| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148546000 | With working | 63 |
| 20080202645 | Multi-phase steel sheet excellent in hole expandability and method of producing the same - The present invention provides a steel sheet excellent in both a balance between strength and elongation and a balance between strength and hole expandability, in other words, a multi-phase steel sheet having an excellent balance between strength and hole expandability. | 08-28-2008 |
| 20090250145 | Method of producing non-oriented electrical steel sheet excellent in magnetic properties - A rapidly-solidified non-oriented electrical steel sheet having high magnetic flux density and low core loss is provided. | 10-08-2009 |
| 20090320968 | DIFFERENTIAL HEAT SHAPING AND HARDENING USING INFRARED LIGHT - A shaped part having at least two structural regions of different ductility is made from one unitary blank of a hardenable steel alloy by first heating the entire blank to an elevated temperature below an AC | 12-31-2009 |
| 20100032062 | STEEL PLATE HAVING A LOW WELDING CRACK SUSCEPTIBILITY AND A YIELD STRENGTH OF 800MPa AND MANUFACTURE METHOD THEREOF - The present invention provides a steel plate having a low welding crack susceptibility and a yield strength of 800 MPa and a manufacturing method for the same. The steel plate having a low welding crack susceptibility comprises the following chemical components (wt. %: percent by weight): C: 0.03-0.08 wt. %, Si: 0.05-0.70 wt. %, Mn: 1.30-2.20 w.t %, Mo: 0.10-0.30 wt. %, Nb: 0.03-0.10 wt. %, V: 0.03-0.45 wt. %, Ti: 0.002-0.040 wt. %, Al: 0.02-0.04 wt. %, B: 0.0010-0.0020 wt. %, the balance being Fe and unavoidable impurities, and the welding crack susceptibility index meets the following formula: Pcm≦0.20%. The thermo-mechanical controlled rolling and cooling processes is used to obtain an ultrafine bainite batten matrix structure, which increases the intensity, plasticity and toughness of the steel plate. The steel plate with a low welding crack susceptibility of the present invention has a yield strength of greater than 800 MPa, a tensile strength of greater than 900 MPa, a Charpy impact energy Akv (−20° C.) of no less than 150 J and an excellent welding performance. | 02-11-2010 |
| 20100065161 | Method for manufacturing flat steel products from silicon alloyed multi-phase steel - A method, which allows high-tensile flat steel products to be manufactured with less effort includes a steel that forms a multi-phase microstructure and contains (in wt. %) 0.10-0.15% C, 0.80-1.20 % Mn, up to 0.030% P, up to 0.004 % S, 1.10-1.30 % Si, 0.0-0.05% Al, up to 0.0060% N, 0.30-0.60% Cr, 0.080-0.120% Ti, 0.040-0.060% Nb, 0.150-0.250% Mo remainder iron and unavoidable impurities, being cast into a cast strip having a thickness of 1-4 mm. The cast strip is hot-rolled in-line into a hot-rolled strip having a thickness of 0.5-3.2 mm in a continuous process at a final hot-rolling temperature ranging from 850 to 1000° C., the deformation degree being greater than 20%. The hot-rolled strip is coiled at a coiling temperature ranging from 450 to 700° C., so as to obtain a hot-rolled strip, which has a minimum tensile strength R | 03-18-2010 |
| 20100065162 | Method for Manufacturing Flat Steel Products From Aluminum Alloyed Multi-Phase Steel - A method, which allows high-tensile flat steel products to be manufactured with less effort includes a steel that forms a multi-phase microstructure and contains (in wt. %) 0.10-0.14% C, 1.30-1.70% Mn, up to 0.030% P, up to 0.004% S, 0.10-0.30% Si, 0.90-1.2% Al, up to 0.0070% N, 0.070-0.130% Ti, 0.040-0.060% Nb, 0.140-0.260% Mo, remainder iron and unavoidable impurities, being cast into a cast strip having a thickness of 1-4 mm. The cast strip is hot-rolled in-line into a hot-rolled strip having a thickness of 0.5-3.2 mm in a continuous process at a final hot-rolling temperature ranging from 850 to 1000° C., the deformation degree being greater than 20%. The hot-rolled strip is coiled at a coiling temperature ranging from 350 to 480° C., so as to obtain a hot-rolled strip, which has a minimum tensile strength R | 03-18-2010 |
| 20100078097 | STEEL MATERIAL SUPERIOR IN HIGH TEMPERATURE CHARACTERISTICS AND TOUGHNESS AND METHOD OF PRODUCTION OF SAME - A steel material superior in high temperature characteristics and toughness is provided, that is, a steel material containing, by mass %, C: 0.005% to 0.03%, Si: 0.05% to 0.40%, Mn: 0.40% to 1.70%, Nb: 0.02% to 0.25%, Ti: 0.005% to 0.025%, N: 0.0008% to 0.0045%, B: 0.0003% to 0.0030%, restricting P: 0.030% or less, S: 0.020% or less, Al: 0.03% or less, and having a balance of Fe and unavoidable impurities, where the contents of C and Nb satisfy | 04-01-2010 |
| 20100096047 | Method for manufacturing flat steel products from a steel forming a martensitic microstructure - A method, which allows extremely high-tensile flat steel products to be manufactured with less effort includes a steel that forms a martensitic microstructure and contains (in wt. %) C: 0.15-0.19%, Mn: 0.80-1.20%, P: <0.030%, S: <0.004%, Si: 0.60-1.00%, Al: <0.05%, N: <0.0060%, Cr: 0.30-0.60%, Nb: 0.040-0.070%, remainder iron and unavoidable impurities, being cast into a cast strip having a thickness of 1-4 mm. The cast strip is hot-rolled in-line into a hot-rolled strip having a thickness of 0.5-3.2 mm in a continuous process at a final hot-rolling temperature ranging from 900 to 1050 ° C., the deformation degree being greater than 20%. The hot-rolled strip is coiled at a coiling temperature of at most 350° C., so as to obtain a hot-rolled strip, which has a minimum tensile strength R | 04-22-2010 |
| 20100307644 | PROCESS FOR MANUFACTURING COLD-ROLLED AND ANNEALED STEEL SHEET WITH A VERY HIGH STRENGTH, AND SHEET THUS PRODUCED - The invention relates to a cold-rolled and annealed steel sheet with a strength greater than 1200 MPa, the composition of which comprises, the contents being expressed by weight: 0.10%≦C≦0.25%, 1%≦Mn≦3%, Al≧0.010%, Si≦2.990%, S≦0.015%, P≦0.1%, N≦0.008%, it being understood that 1%≦Si+Al≦3%, the composition optionally comprising: 0.05%≦V≦0.15%, B≦0.005%, Mo≦0.25%, Cr≦1.65%, it being understood that Cr+3Mo≧0.3%, Ti in an amount such that Ti/N≧4 and Ti≦0.040%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel comprising 15 to 90% bainite, the remainder consisting of martensite and residual austenite. | 12-09-2010 |
| 20100319816 | Thin gauge steel sheet excellent in surface conditions, formability, and workability and method for producing the same - The present invention provides ultralow carbon thin gauge steel sheet and a method for producing the same where coalescence and growth of inclusions in the molten steel are prevented and the inclusions are finely dispersed in the steel sheet, whereby surface defects and cracks at the time of press forming are prevented, growth of recrystallized grains at the time of continuous annealing is promoted, and a high r value (r value≧2.0) and elongation (total elongation≧0%) are exhibited, that is, ultralow carbon thin gauge steel sheet excellent in surface conditions, formability, and workability comprised of, by mass %, 0.00030.003%≦C≦0.003%, Si≦0.01%, Mn≦0.1%, P≦0.02%, S≦0.01%, 0.0005%≦N≦0.0025%, 0.01%≦acid soluble Ti≦0.07%, acid soluble Al≦0.003%, and 0.002%≦La+Ce+Nd≦0.02% and a balance of iron and unavoidable impurities, said steel sheet characterized by containing at least cerium oxysulfite, lanthanum oxysulfite, and neodymium oxysulfite. | 12-23-2010 |
| 20110083775 | HEAVY WALL STEEL MATERIAL HAVING SUPERIOR WELDABILITY AND METHOD FOR PRODUCING THE SAME - A tough high strength heavy wall steel material having superior weldability is provided, said steel material has a diameter or a side 5 mm or more in length, and comprises oxides 1 μm or less in particle diameter homogeneously dispersed at a dispersion density in a range of from 10,000 to 100,000 particles/mm | 04-14-2011 |
| 20110192504 | Method for producing a galvanized steel sheet - A method for producing a galvanized steel sheet including (a) melting a steel having a steel composition comprising 0.005 to 0.04 mass % C, 1.5 mass % or lower Si, 1.0 to 2.0 mass % Mn, 0.10 mass % or lower P, 0.03 mass % or lower S, 0.01 to 0.1 mass % Al, less than 0.008 mass % N and 0.2 to 1.0 mass % Cr, wherein Mn (mass %)+1.29 Cr (mass %) is 2.1 to 2.8, and the balance being iron and unavoidable impurities, (b) hot rolling and cold rolling the steel from step (a) to provide a steel sheet, and (c) annealing the steel sheet from step (c) at an annealing temperature of at least the Ac1 point and not more than the Ac3 point, wherein the galvanized steel sheet has a structure which includes a ferrite phase and a martensite phase with a volume fraction being at least 3.0% and less than 10%, the average particle diameter of the ferrite is larger than 6 μm and not more than 15 μm, and 90% or more of the martensite phase exists in a ferrite grain boundary. | 08-11-2011 |
| 20110220252 | DUAL-PHASE STEEL, FLAT PRODUCT MADE OF SUCH A DUAL-PHASE STEEL AND PROCESS FOR THE PRODUCTION OF A FLAT PRODUCT - A dual-phase steel, a flat product and processes for the production thereof. The dual-phase steel having a strength of at least 950 MPa, good deformability, and good surface finish. It is possible, when a simple production process is used, for the flat product produced from this steel to be formed into a complexly formed component, such as part of a car body, either uncoated or provided with an anti-corrosion coating. The steel according to the invention has a structure comprising 20-70% martensite, up to 8% retained austenite and the remainder ferrite and/or bainite and has the following composition (in % by weight): C: 0.050-0.105%, Si: 0.20-0.60%, Mn: 2.10-2.80%, Cr: 0.20-0.80%, Ti: 0.02-0.10%, B: <0.0020%, Mo: <0.25%, Al: <0.10%, Cu: up to 0.20%, Ni: up to 0.10%, Ca: up to 0.005%, P: up to 0.2%, S: up to 0.01%, N: up to 0.012%, remainder iron and unavoidable impurities. | 09-15-2011 |
| 20110308673 | Manganese steel strip having an increased phosphorous content and process for producing the same - A hot-rolled austenitic manganese steel strip having a chemical composition in percent by weight of 0.4%≦C≦1.2%, 12.0%≦Mn≦25.0%, P≧0.01% and Al≦0.05% has a product of elongation at break in % and tensile strength in MPa of above 65,000 MPa %, in particular above 70,000 MPa %. A cold-rolled austenitic manganese steel strip having the same chemical composition achieves a product of elongation at break in % and tensile strength in MPa of above 75,000 MPa %, in particular above 80,000 MPa %. | 12-22-2011 |
| 20120285584 | Manufacture Process Of Non-Oriented Silicon Steel With High Magnetic Induction - A manufacture process of non-oriented silicon steel with high magnetic induction includes smelting and casting steel having a chemical composition by weight percent: Si 0.1˜1%, Al 0.005˜1.0%, C≦0.004%, Mn=0.10˜1.50%, P≦0.2%, S≦0.005%, N≦0.002, Nb+V+Ti≦0.006%, and the rest is Fe. The steel is cast into a billet, which is heated and hot-rolled to 1150˜1200° C. into a plate at a finish-rolling temperature 830˜900° C. The plate is cooled to a temperature ≧570° C. and cold-roll flattened at compression ratio 2˜5%. The flattened plate is normalized at temperature not below 950° C. for 30˜180s, and then pickled and cold-rolled into a sheet with thickness of the finished product. The sheet is finish-annealed quickly heating the sheet to 800˜1000° C. at temperature rise rate ≧100° C./s, soaking the heated sheet for 5˜60s at the temperature, and then slowly cooling the sheet to 600˜750° C. | 11-15-2012 |
| 20120298267 | Non-Oriented Electrical Steel Having High Magnetic Induction And High Intensity And Manufacturing Method Thereof - A non-oriented electrical steel has relative high magnetic induction and high intensity without increasing manufacturing difficulty. The weight percentage of the compositions of the electrical steel are as follows: C≦0.0040%, Si is 2.50% to 4.00%, Al is 0.20% to 0.80%, Cr is 1.0 to 8.0%, Ni is 0.5 to 5.0%, Mn≦0.50%, P≦0.30%, S≦0.0020%, N≦0.0030%, Ti≦0.0030%, Nb≦0.010%, V≦0.010%, C+S+N+Ti≦0.010%, and a balance substantially being Fe and inevitable impurities. | 11-29-2012 |
| 20130174942 | STEEL PLATE FOR PRODUCING LIGHT STRUCTURES AND METHOD FOR PRODUCING SAID PLATE - The invention relates to a steel plate, the chemical composition of which comprises, the contents being expressed by weight: 0.010%≦C≦0.20%, 0.06%≦Mn≦3%, Si≦1.5%, 0.005%≦Al≦1.5%, S≦0.030%, P≦0.040%, 2.5%≦Ti≦7.2%, (0.45×Ti)−0.35%≦B≦(0.45×Ti)+0.70%, and optionally one or more elements chosen from: Ni≦1%, Mo≦1%, Cr≦3%, Nb≦0.1%, V≦0.1%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting. | 07-11-2013 |
| 20130174943 | CASE HARDENED STEEL AND METHOD FOR PRODUCING SAME - A case hardened steel with excellent cold forgeability and excellent impact properties after case hardening processing contains C, Si, Mn, S, Cr, Al, Ti, Nb, B, and N, with the balance being iron and unavoidable impurities. Of precipitates containing Ti and/or Nb, precipitates having a size of not less than 20 μm | 07-11-2013 |
| 20130299049 | MANUFACTURE METHOD OF ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE - A method for manufacturing a grain-oriented silicon steel having excellent magnetic performance, comprising steps as follows 1)conventionally melting and casting into a steel blank; 2) heating the steel blank and hot rolling the same into a strip of steel; 3)normalizing process; carrying out the normalizing process having two stages, wherein the strip is firstly heated to 1100˜1200° C., then cooled to 900˜1000° C. within 50˜200 s; and next, the strip is rapidly cooled in water having a temperature of 10-100; in this period, a tension force is applied to the strip of steel, the strip of steel in the temperature range of 900 ° C.˜500° C. has a stress of 1˜200N/mm | 11-14-2013 |
| 20140000767 | STEEL WIRE ROD AND METHOD OF PRODUCING SAME | 01-02-2014 |
| 20140007992 | Method for Producing a Hot-Rolled Flat Steel Product - A method for generating a flat steel product comprising the steps of: melting a steel melt, comprising, in addition to Fe and unavoidable impurities (in wt %) C: 0.5-1.3%, Mn: 18-26%, Al: 5.9-11.5%, Si: <1%, Cr: <8%, Ni: <3%, Mo: <2%, N: <0.1%, B: <0.1%, Cu: <5%, Nb: <1%, Ti: <1%, V: <1%, Ca: <0.05%, Zr: <0.1%, P: <0.04%, S: <0.04%; casting the steel melt into a cast strip; heating the cast strip to an initial hot-rolling temperature of 1100-1300° C. at a heating rate of at least 20 K/s; hot rolling the cast strip into a hot strip; cooling the hot strip within 10 seconds after the hot rolling at a cooling rate of at least 100 K/s to <400° C.; and winding the cooled hot strip into a coil at a coiling temperature of up to 400° C. | 01-09-2014 |
| 20140041767 | Hot-Rolled Flat Steel Product Produced from a Complex Phase Steel and Method for the Production Thereof - A hot-rolled flat steel product having a tensile strength of at least 1100 MPa, good elongation properties, and good deformation properties. The flat steel product is produced from a complex phase steel, which contains, in addition to iron and inevitable impurities (in % by weight), C: 0.13-0.2%, Mn: 1.8-2.5%, Si: 0.70-1.3%, Al: 0.01 to 0.1%, P: up to 0.1%, S: up to 0.01%, Cr: 0.25-0.70%, optionally Mo, the total of the Cr and Mo contents being 0.25-0.7%, Ti: 0.08-0.2%, B: 0.0005-0.005%, and a structure which consists of at the most 10% by volume of residual austenite, 10-60% by volume of martensite, at the most 30% by volume of ferrite and at least 10% by volume of bainite. Also, a method for producing such a flat steel product. | 02-13-2014 |
| 20140102600 | Bainitic Steel of High Strength and High Elongation and Method to Manufacture Said Bainitic Steel - The invention relates to a bainite steel consisting of the following elements in weight %: C: 0.25-0.55 Si: 0.5-1.8 Mn: 0.8-3.8 Cr: 0.2-2.0 Ti: 0.0-0.1 Cu: 0.0-1.2 V: 0.0-0.5 Nb: 0.0-0.06 Al: 0.0-2.75 N: <0.004 P: <0.025 S: <0.025 and a method for manufacturing a bainite steel strip that comprises the step of cooling the coiled strip of such composition to ambient temperature, during which the bainite transformation takes place. | 04-17-2014 |
| 20140130943 | Method of Making High Strength Steel Crane Rail - A method of making a high strength head-hardened crane rail and the crane rail produced by the method. The method comprises the steps of providing a steel rail having a composition comprising, in weight percent: C, 0.79-1.00%; Mn, 0.40-1.00; Si, 0.30-1.00; Cr, 0.20-1.00; V, 0.05-0.35; Ti, 0.01-0.035; N, 0.002 to 0.0150; and the remainder being predominantly iron. The steel rail is cooled from a temperature between about 700 and 800° C. at a cooling rate having an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 800° C.), (40 s, 700° C.), and (140 s, 600° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 700° C.), (40 s, 600° C.), and (140 s, 500° C.). | 05-15-2014 |
| 20150041026 | INGOT FOR BEARING AND PRODUCTION PROCESS - A method is provided with which a bearing steel, even when obtained from an ingot, is made to have a segregation part reduced in the degree of segregation and maximum inclusion diameter. The ingot contains 0.56-0.70 mass % C, 0.15-0.50 mass %, excluding 0.50 mass %, Si, 0.60-1.50 mass % Mn, 0.50-1.10 mass % Cr, 0.05-0.5 mass % Mo, up to 0.025 mass % P, up to 0.025 mass % S, 0.005-0.500 mass % Al, up to 0.0015 mass % O, and 0.0030-0.015 mass % N, with the remainder comprising Fe and incidental impurities. The ingot has a degree of segregation of 2.8 or less and a predicted value of the maximum diameter of inclusions present in 30,000 mm | 02-12-2015 |
| 20150337416 | HIGH-FORMABILITY AND SUPER-STRENGTH COLD-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREOF - A high-formability and super-strength cold-rolled steel sheet and a manufacturing method thereof. The weight percentage of its components is: C 0.15-0.25%, Si 1.00-2.00%, Mn 1.50-3.00%, P≦0.015%, S≦0.012%, Al 0.03-0.06%, N≦0.008%, and the rest are Fe and inevitable impurities. The manufacturing method comprises the following steps: 1) smelting and casting; 2) heating to 117˜1230° C. and performing thermal insulation; 3) performing hot rolling, the finish rolling temperature being 880+30° C., and coiling at 550˜650° C.; and 4) performing acid washing, cold rolling, and annealing, the cold rolling reduction being 40-60%, annealing at 860-920° C., and performing slow cooling to 690-750° C. with the cooling rate of 3˜10° C./s; performing rapid cooling at 240˜320° C., with the cooling speed ≧50° C./s, then heating to 360˜460° C., and performing thermal insulation for 100˜500 s to cool to the room temperature at last. Finally, a high-formability, low-rebound property and super-strength cold-rolled steel sheet with the yield strength of 600˜900 MPa, the tensile strength of 980˜1150 MPa, the elongation of 17˜25% is obtained. | 11-26-2015 |
| 20150361519 | A 780MPA COLD-ROLLED DUEL-PHASE STRIP STEEL AND METHOD FOR MANUFACTURING THE SAME - The invention discloses a 780 MPa cold-rolled duel-phase strip steel having a microstructure of fine equiaxed ferrite matrix and martensite islands distributed homogeneously on the ferrite matrix, and comprising the following chemical elements in mass percentage: C:0.06-0.1%; Si≦0.28%; Mn:1.8-2.3%; Cr:0.1-0.4%; Mo: not added when Cr≧0.3%; Mo=0.3-Cr when Cr<0.3%; Al: 0.015-0.05%; at least one of Nb and Ti elements, wherein Nb+Ti is in the range of 0.02-0.05%; and the balance amounts of Fe and other unavoidable impurities. Correspondingly, the invention also discloses a method for manufacturing the 780 MPa cold-rolled duel-phase strip steel. The 780 MPa cold-rolled duel-phase strip steel has high strength, superior elongation, good phosphating property and small anisotropy in mechanical properties. | 12-17-2015 |
| 20150368740 | COLD-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREFOR - A cold-rolled steel plate having favorable heat spot resistance and favorable antiwear performance is provided. | 12-24-2015 |
| 20150369301 | CLUTCH PLATE FOR MULTI-PLATE WET CLUTCH, AND PRODUCTION METHOD THEREFOR - A clutch plate for a multiplate wet clutch having favorable fatigue strength is provided. | 12-24-2015 |
| 20150376751 | Cold-Rolled Flat Steel Product for Deep Drawing Applications and Method for Production Thereof - A cold-rolled flat steel product for deep drawing applications is disclosed, composed of a steel which, in addition to Fe and unavoidable impurities (in % by weight) contains C: <0.1%, Al: 6.5-11%, REM: 0.02-0.2%, P: <0.1%, S: <0.03%, N: <0.1% and optionally one or more elements from the group of “Mn, Si, Nb, Ti, Mo, Cr, Zr, V, W, Co, Ni, B, Cu, Ca, N”, provided that Mn: <6%, Si: <1%, Nb: <0.3%, Ti: <0.3%, Zr: <1%, V: <1%, V: <1%, Mo: <1%, Cr: <3%, Co: <1%, Ni: <2%, B: <0.1%, Cu: <3%, Ca: <0.015%. For production of such a flat steel product, a steel of appropriate composition is cast to give a pre-product, which is then hot-rolled to hot strip at a hot rolling end temperature of 820-1000° C. The latter is subsequently wound at a winding temperature of up to 850° C., after winding annealed at an annealing temperature of >650-1200° C. for 1-50 h, then cold-rolled in one or more stages with a total cold rolling level of ≧30% to give the cold-rolled flat steel product and finally annealed at 650-850° C. | 12-31-2015 |
| 20160002745 | HOT-ROLLED STEEL SHEET HAVING EXCELLENT DRAWABILITY AND POST-PROCESSING SURFACE HARDNESS - The present invention intends a hot-rolled steel sheet with a sheet thickness in a range of 2 to 15 mm, having component composition including C: 0.3% or less by mass %, Si: 0.5% or less, Mn: in a range of 0.2 to 1%, P: 0.05% or less, S: 0.05% or less, Al: in a range of 0.01 to 0.1%, N: in a range of 0.008 to 0.025%, and the remainder being iron and unavoidable impurities. The hot-rolled steel sheet includes an amount of solute N: not less than 0.007%, and ferrite grains existing at a position of t/4 in depth (t: the sheet thickness) includes the ferrite grains, a sheet plane orientation thereof, within 10° from the (123) plane, having an area ratio: not less than 20%, the ferrite grains, a sheet plane orientation thereof, within 10° from the (111) plane, having an area ratio: not less than 5%, and the ferrite grains, a sheet plane orientation thereof, within 10° from the (001) plane, having an area ratio: 20% or less, the average grain size of the ferrite grains existing at the position of t/4 in depth being in a range of 3 to 35 μm. | 01-07-2016 |
| 20160017449 | 700MPA-Level High-Strength Hot Rolling Q&P Steel And Method Of Manufacturing The Same - A 700 Mpa-level high-strength hot rolling Q&P steel and the method of manufacturing the same, which steel has the chemical compositions in weight percentage as follows: C: 0.15%˜0.40%; Si: 1.0%˜2.0%; Mn: 1.5%˜3.0%; P: less than or equal to 0.015%; S: less than or equal to 0.005%; Al: 0.3%˜1.0%; N: less than or equal to 0.006%; Ti: 0.005%˜0.015%, the remainders being Fe; it having a yield strength of more than or equal to 700 Mpa, a tensile strength of more than or equal to 1300 Mpa and an elongation rate of more than 10%. Through reasonable design on the compositions and on the basis of the compositions of common C—Mn steel, the present invention improves the content of Si to restrict the precipitation of cementite, performs the micro-Ti treatment to refine the austenite grains, and improves the content of Al to quicken the austenite transformation dynamics during the air cooling process; at the same time, combines the hot rolling process with the staged cooling process to obtain the structures of proeutectoid ferrite plus martensite plus retained austenite and reduces the cost of alloy elements substantially. | 01-21-2016 |
| 20160017467 | Cold-Rolled Flat Steel Product for Deep Drawing Applications and Method for Production Thereof - A cold-rolled flat steel product for deep drawing applications is disclosed, composed of a steel which, in addition to Fe and unavoidable impurities (in % by weight) contains C: 0.008%-0.1%, Al: 6.5%-12%, Nb: 0.1%-0.2%, Ti: 0.15-0.5%, P: <0.1%, S: <0.03%, N: <0.1% and optionally one or more elements from the group of “Mn, Si, REM, Mo, Cr, Zr, V, W, Co, Ni, B, Cu, Ca, N”, provided that Mn: <1%, REM: <0.2%, Si: <2%, Zr: <1%, V: <1%, W: <1%, Mo: <1%, Cr: <3%, Co: <1%, Ni: <2%, B: <0.1%, Cu: <3%, Ca: <0.015%. The ratio is 2.5 ≧% Ti/% Nb ≧1.5, %Ti=Ti content and % Nb=Nb content. For production of such a flat steel product, a steel of appropriate composition is cast to give a pre-product, which is then hot-rolled to hot strip at a hot rolling end temperature of 820-1000° C. The latter is subsequently wound at a winding temperature of up to 750° C., after winding annealed at an annealing temperature of >650-1200° C. for 1-50 h, then cold-rolled in one or more stages with a total cold rolling level of ≧65% to give the cold-rolled flat steel product and finally annealed at 650-850° C. | 01-21-2016 |
| 148547000 | With tempering, ageing, solution treating (i.e., for hardening), precipitation hardening or strengthening, or quenching | 30 |
| 20080236707 | Method and Device For Producing a Mechanical Part, in Particular a Bearing Ring and a Part Produced By Said Method - A device and method for producing, by molding, a circular-shaped mechanical part made of a metal alloy. The device has a rotatable hollow mold for receiving a predetermined quantity of the metal alloy. The predetermined quantity of the metal alloy is defined by at least one segment of a metal alloy rod. An inductive heating device melts the metal alloy to a melting point. A blank of the mechanical part being formed by centrifuging the melted metal alloy. Cooling the blank in the hollow mold to a second temperature which corresponds to a desired malleability. Processing the blank with a shaping tool to obtain a desired internal profile. To harden and form the circular-shaped mechanical part, the blank is further cooled to a tempering temperature. | 10-02-2008 |
| 20080283158 | Method for Manufacturing High Tensile Strength Steel Plate - The present invention provides a method for manufacturing high tensile strength steel plate having 570 MPa (N/mm | 11-20-2008 |
| 20080308195 | Steel For Springs, Process Of Manufacture For Spring Using This Steel, And Spring Made From Such Steel - A spring steel with high fatigue resistance in air and in corrosive conditions and with high resistance to cyclic sag, having the composition in weight percent:
| 12-18-2008 |
| 20090107588 | PROCESS FOR MANUFACTURING STEEL SHEET HAVING VERY HIGH STRENGTH, DUCTILITY AND TOUGHNESS CHARACTERISTICS, AND SHEET THUS PRODUCED - The invention relates to a hot-rolled steel sheet having a tensile strength of greater than 1200 MPa, an Re/Rm ratio of less than 0.75 and an elongation at break of greater than 10%, the composition of which contains, the contents being expressed by weight: 0.10%≦C≦0.25%; 1%≦Mn≦3%; Al≧0.015%; Si≦1.985%; Mo≦0.30%; Cr≦1.5%; S≦0.015%; P≦0.1%; Co≦1.5%; B≦0.005%; it being understood that 1%≦Si+Al≦2%; Cr+(3×Mo)≧0.3%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the microstructure of the steel consisting of at least 75% bainite, residual austenite in an amount equal to or greater than 5% and martensite in an amount equal to or greater than 2%. | 04-30-2009 |
| 20100006188 | POWER CLAMPING FOR WATER BOXES - A water box for use in cooling a hot rolled product in a rolling mill comprises a plurality of nozzles arranged sequentially along a first axis. The nozzles are subdivided into base and top sections, with the top sections being adjustable between closed positions coacting with the base sections to define tubular enclosures through which the product is directed, and open positions. A clamp support extends in parallel relationship to the first axis, and carries clamp members. An operating mechanism adjusts the clamp support between an open setting at which the clamp members are separated from the nozzle top sections and the nozzle top sections are adjustable to their open positions, and a closed setting at which the top sections are in their closed positions and the clamp members are in contact with and urge the top sections into their closed positions. | 01-14-2010 |
| 20100024926 | HIGH TENSILE STRENGTH STEEL HAVING FAVORABLE DELAYED FRACTURE RESISTANCE AND METHOD FOR MANUFACTURING THE SAME - High tensile strength steels that have both favorable delayed fracture resistance and a tensile strength of 600 MPa or higher and are suitably used in construction machinery, tanks, penstocks, and pipelines, as well as methods for manufacturing such steels are provided. The safety index of delayed fracture resistance (%) is 100×(X | 02-04-2010 |
| 20100212785 | HIGH-STRENGTH LOW-ALLOY STEEL EXCELLENT IN HIGH-PRESSURE HYDROGEN ENVIRONMENT EMBRITTLEMENT RESISTANCE CHARACTERISTICS AND METHOD FOR PRODUCING THE SAME - An object of the present invention is to provide at a low cost a low-alloy steel having a high strength and excellent high-pressure hydrogen environment embrittlement resistance characteristics under a high-pressure hydrogen environment. The invention is a high-strength low-alloy steel excellent in high-pressure hydrogen environment embrittlement resistance characteristics, which is characterized in that the steel has a composition comprising C: 0.10 to 0.20%, Si: 0.10 to 0.40%, Mn: 0.50 to 1.20%, Cr: 0.20 to 0.80%, Cu: 0.10 to 0.50%, Mo: 0.10 to 1.00%, V: 0.01 to 0.10%, B: 0.0005 to 0.005% and N: 0.01% or less, by mass, with the balance consisting of Fe and unavoidable impurities. | 08-26-2010 |
| 20100300585 | LOW-DENSITY STEEL HAVING GOOD DRAWABILITY - The invention relates to a hot-rolled ferritic steel sheet, the composition of the steel of which comprises, the contents being expressed by weight: 0.001≦C≦0.15%, Mn≦1%, Si≦1.5%, 6%≦Al≦10%, 0.020%≦Ti≦0.5%, S≦0.050%, P≦0.1%, and, optionally, one or more elements chosen from: Cr≦1%, Mo≦1%, Ni≦1%, Nb≦0.1%, V≦0.2%, B≦0.010%, the balance of the composition consisting of iron and inevitable impurities resulting from the smelting, the average ferrite grain size d | 12-02-2010 |
| 20110000587 | STEEL, PROCESS FOR THE MANUFACTURE OF A STEEL BLANK AND PROCESS FOR THE MANUFACTURE OF A COMPONENT OF THE STEEL - Steel is described having a chemical composition, in weight-%, of 0.3 to 0.5% carbon (C), from traces to a max. of 1.5% silicon (Si), 0.2 to 1.5% manganese (Mn), 0.01 to 0.2% sulfur (S), 1.5 to 4% chromium (Cr), 1.5 to 5% nickel (Ni), 0.5 to 2% molybdenum (Mo), which at least partially may be replaced by twice as much tungsten (W), 0.2 to 1.5% vanadium (V), from traces to a max. of 0.2% rare earth metals, and a balance essentially of only iron, impurities and accessory elements in normal amounts. In addition, a method for manufacturing a blank of the steel and a process for manufacturing a cutting tool body or holder for cutting tools of the steel is described. | 01-06-2011 |
| 20110017365 | ALLOY AND METHOD FOR PRODUCING ALLOY - To provide an alloy which can suppress minute temporal deformation of a Super Invar alloy as much as possible, and a method for producing the alloy. The alloy of the present invention includes iron, nickel, and cobalt, which are the basic components of a Super Invar alloy, and is characterized in that an amount of a fraction which has not carbidized in carbon contained in the alloy is 0.010 wt % or less. | 01-27-2011 |
| 20110067787 | HIGH-STRENGTH LOW-ALLOY STEEL EXCELLENT IN HIGH-PRESSURE HYDROGEN ENVIRONMENT EMBRITTLEMENT RESISTANCE CHARACTERISTICS AND METHOD FOR PRODUCING THE SAME - An object of the present invention is to provide at a low cost a low-alloy steel having a high strength and excellent high-pressure hydrogen environment embrittlement resistance characteristics under a high-pressure hydrogen environment. The invention is a high-strength low-alloy steel having high-pressure hydrogen environment embrittlement resistance characteristics, which has a composition comprising C: 0.10 to 0.20% by mass, Si: 0.10 to 0.40% by mass, Mn: 0.50 to 1.20% by mass, Ni: 0.75 to 1.75% by mass, Cr: 0.20 to 0.80% by mass, Cu: 0.10 to 0.50% by mass, Mo: 0.10 to 1.00% by mass, V: 0.01 to 0.10% by mass, B: 0.0005 to 0.005% by mass and N: 0.01% by mass or less, and further comprising one or two of Nb: 0.01 to 0.10% by mass and Ti: 0.005 to 0.050% by mass, with the balance consisting of Fe and unavoidable impurities. | 03-24-2011 |
| 20110114229 | Ausferritic Wear-Resistant Steel Castings - A method for preparing an austempered, work-hardening steel casting. A melt with certain chemical ranges including relatively high carbon and silicon content is poured, heat treated, cooled, austenitized, quenched and austempered, before final cooling to room temperature. This process provides a steel casting with increased wear life, characterized by a duplex microstructure containing ferrite plus carbon in solution in austenite known as ausferrite. The austenite will transform during abrasive service to a hard, wear-resistant martensite on the surface. | 05-19-2011 |
| 20110303329 | CAST IRON SEMI-FINISHED PRODUCT EXCELLENT IN WORKABILITY AND METHOD OF PRODUCTION OF THE SAME - The present invention provides tough cast iron and cast iron semi-finished products excellent in workability without heat treatment requiring massive heat energy and long time and a method of production enabling these to be efficiently produced, that is, cast iron of ingredients of white cast iron where particles of spheroidal graphite or flattened graphite are dispersed, cast iron where the ingredients of the white cast iron satisfy, by wt %, (% C)≦4.3-(% Si)÷3 and C≧1.7% and where the particles of spheroidal graphite are dispersed at a density of 50 particles/mm | 12-15-2011 |
| 20120125492 | Ultratough high-strength weldable plate steel - A transformation toughened, high-strength steel alloy useful in plate steel applications achieves extreme fracture toughness (Cv & gt; 80 ft-lbs corresponding to KId=200 ksi.in ½) at strength levels of 150-180 ksi yield strength, is weldable and formable. The alloy is characterized by dispersed austenite stabilization for transformation toughening to a weldable, bainitic plate steel and is strengthened by precipitation of M2C carbides in combination with copper and nickel. The desired microstructure is a matrix containing a bainite-martensite mix, BCC copper and M2C carbide particles for strengthening with a fine dispersion of optimum stability austenite for transformation toughening. The bainite-martensite mix is formed by air-cooling from solution treatment temperature and subsequent aging at secondary hardening temperatures to precipitate the toughening and strengthening dispersions. | 05-24-2012 |
| 20120132322 | ABRASION RESISTANT STEEL, METHOD OF MANUFACTURING AN ABRASION RESISTANT STEEL AND ARTICLES MADE THEREFROM - An abrasion resistant steel consisting essentially of, in weight %: 0.20-0.30% carbon, 0.40-1.25% manganese, 0.05% maximum phosphorous, 0.01% maximum sulfur, 0.20-0.60% silicon, 0.50-1.70% chromium, 0.20-2.00% nickel, 0.07-0.60% molybdenum, 0.010-0.10% titanium, 0.001-0.10% boron, 0.015-0.10% aluminum, balance iron, and incidental impurities. The steel may be melted and cast into a steel ingot or slab, hot rolled to a desired plate thickness; austenitized at 1650-1700° F.; water quenched; and tempered at 350-450° F. The resulting steel plate may have a surface hardness of at least 440 HBW, a mid-thickness hardness of at least 90% of the surface hardness, and toughness in the transverse direction at −60° F. of at least 20 ft-lbs and at room temperature of at least 40 ft-lbs. | 05-31-2012 |
| 20120132323 | THIN CAST STRIP PRODUCT WITH MICROALLOY ADDITIONS, AND METHOD FOR MAKING THE SAME - A steel product having, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, aluminum 0.008% or less by weight, and at least one element selected from the group consisting of titanium between about 0.01% and about 0.20%, niobium between about 0.01% and about 0.20%, molybdenum between about 0.05% and about 0.50%, and vanadium between about 0.01% and about 0.20%, and having a microstructure comprised of a majority bainite, and fine oxide particles of silicon and iron distributed through the steel microstructure of average precipitate size less than 50 nanometers. The yield strength of the steel product may be at least 55 ksi (380 MPa) or the tensile strength of at least 500 MPa, or both. The steel product may have total elongation of at least 6% or 10%, and thickness less than 3.0 mm. | 05-31-2012 |
| 20130213531 | METHOD FOR PRODUCING ALLOY - To provide an alloy which can suppress minute temporal deformation of a Super Invar alloy as much as possible, and a method for producing the alloy. The alloy of the present invention includes iron, nickel, and cobalt, which are the basic components of a Super Invar alloy, and is characterized in that an amount of a fraction which has not carbidized in carbon contained in the alloy is 0.010 wt % or less. | 08-22-2013 |
| 20130284321 | Multi-Phase Steel, Cold-Rolled Flat Product Produced from Such a Multi-Phase Steel and Method for Producing It - A multi-phase steel including in % wt. C: 0.14-0.25%, Mn: 1.7-2.5%, Si: 0.2-0.7%, Al: 0.5-1.5%, Cr: <0.1%, Mo: <0.05%, Nb: 0.02-0.06%, S: up to 0.01%, P: up to 0.02%, N: up to 0.01% and optionally at least one of Ti, B, and V according to the following stipulation: Ti: up to 0.1%, B: up to 0.002%, V: up to 0.15%, with the remainder iron and unavoidable impurities, wherein the microstructure has at least 10% vol. ferrite and at least 6% vol. residual austenite and the steel has a tensile strength R | 10-31-2013 |
| 20140144557 | METHOD FOR PRODUCING LOW TEMPERATURE BAINITE STEEL CONTAINING ALUMINUM - A method for producing low temperature bainite steel containing aluminum may include providing an alloy steel containing aluminum, carbon, chromium, silicon, molybdenum, manganese and nickel, wherein the amount of aluminum is in the range of 0.5 to 1.5 wt. %, and the amount of carbon is in the range of 0.2 to 1.1 wt. %; smelting to convert the alloy steel into a molten steel, followed by subjecting to refining and vacuum degassing, and then subjected to rolling or forging; heating the steel to 880-950° C., cooling the steel to M | 05-29-2014 |
| 20140182749 | IRON-BASED COMPOSITION FOR FUEL ELEMENT - Disclosed embodiments include fuel assemblies, fuel element, cladding material, methods of making a fuel element, and methods of using same. | 07-03-2014 |
| 20140238556 | Class of Warm Forming Advanced High Strength Steel - Metallic alloys are disclosed containing Fe at 48.0 to 81.0 atomic percent, B at 2.0 to 8.0 atomic percent, Si at 4.0 to 14.0 atomic percent, and at least one or more of Cu, Mn or Ni, wherein the Cu is present at 0.1 to 6.0 atomic percent, Mn is present at 0.1 to 21.0 atomic percent and Ni is present at 0.1 to 16.0 atomic percent. The alloys may be heated at temperatures of 200° C. to 850° C. for a time period of up to 1 hour and upon cooling there is no eutectoid transformation. The alloys may then be formed into a selected shape. | 08-28-2014 |
| 20150047754 | Cr-Mo ALLOY STEEL COMPOSITION HAVING EXCELLENT HYDROGEN BRITTLENESS RESISTANCE AND METHOD FOR HEAT TREATMENT OF THE SAME - Alloy steel compositions having improved resistance to hydrogen brittleness and methods of heat treating same are provided. The alloy steel compositions find applications in hydrogen storage containers, piping systems for hydrogen fuel cell vehicles, or reinforced boards for sound absorption/insulation on a multiple layers. The alloy steel compositions include 1.0 to 2.5% by weight of aluminum (Al), based on the total weight of the composition. Improved resistance to hydrogen brittleness is effected by stabilizing an inner part of the composition and forming an Al | 02-19-2015 |
| 20150329945 | HIGH-HARDNESS, HIGH-TOUGHNESS, WEAR-RESISTANT STEEL PLATE AND MANUFACTURING METHOD THEREOF - The invention provides a wear-resistant steel plate, which has the following chemical composition (wt. %): C: 0.36-0.45%, Si: 0.10-0.30%, Mn: 0.40-1.00%, P≦0.015%, S≦0.010%, Nb: 0.010-0.040%, Al: 0.010-0.080%, B: 0.0010-0.0020%, Ti: 0.005-0.050%, Ca: 0.0010-0.0080%, V≦0.080%, Cr≦1.00%, RE≦0.10%, N≦0.0080%, O≦0.0060%, H≦0.0004%, wherein the total amount of Nb and Ti is between 0.025% and 0.080%, the total amount of Al and Ti is between 0.030% and 0.12%, and the balance being Fe and unavoidable impurities. The invention also provides a method of manufacturing the wear-resistant steel plate, comprising smelting, casting, rolling, post-rolling direct cooling and other steps. The wear-resistant steel plate obtained from the above composition and process has high hardness and excellent wear resistance, and is suitable for quick-wear devices in engineering machinery, such as crusher baffle, etc. | 11-19-2015 |
| 20150361531 | HIGH STRENGTH STEEL PLATE AND MANUFACTURING METHOD THEREOF - The invention discloses a high-strength steel plate, comprising the following chemical elements in mass percentages: C: 0.070-0.115%, Si: 0.20-0.50%, Mn: 1.80-2.30%, Cr: 0-0.35%, Mo: 0.10-0.40%, Nb: 0.03-0.06%, V: 0.03-0.06%, Ti: 0.002-0.04%, Al: 0.01-0.08%, B: 0.0006-0.0020%, N≦0.0060%, O≦0.0040%, Ca: 0-0.0045%, and the balance of Fe and unavoidable impurities. The invention further discloses a process of manufacturing said high-strength steel plate. | 12-17-2015 |
| 20160002759 | HIGH-TOUGHNESS LOW-ALLOY WEAR-RESISTANT STEEL SHEET AND METHOD OF MANUFACTURING THE SAME - A high-toughness low-alloy wear-resistant steel sheet and a method of manufacturing the same, which has the chemical compositions (wt %): C: 0.08-0.20%; Si: 0.10-0.60%; Mn: 1.00-2.00%; B: 0.0005-0.0040%; Cr: less than or equal to 1.50%; Mo: less than or equal to 0.80%; Ni: less than or equal to 1.50%; Nb: less than or equal to 0.080%; V: less than or equal to 0.080%; Ti: less than or equal to 0.060%; Al: 0.010-0.080%, Ca: 0.0010-0.0080%, N: less than or equal to 0.0080%, 0: less than or equal to 0.0080%, H: less than or equal to 0.0004%, P: less than or equal to 0.015%, S: less than or equal to 0.010%, and (Cr/5+Mn/6+50B): more than or equal to 0.20% and less than or equal to 0.55%; (Mo/3+Ni/5+2Nb): more than or equal to 0.02% and less than or equal to 0.45%; (Al+Ti): more than or equal to 0.01% and less than or equal to 0.13%, the remainders being Fe and unavoidable impurities. The present invention reduces the contents of carbon and alloy elements, and makes full use of the characteristics of refinement, strengthening, etc. of micro-alloy elements such as Nb, Ti, etc., and through TMCP process, the wear-resistant steel sheet has high strength, high hardness, good toughness, good weldability, excellent wear-resistant performance, and is applicable to wearing parts in various mechanical equipments. | 01-07-2016 |
| 20160010191 | HIGH-HARDNESS LOW-ALLOY WEAR-RESISTANT STEEL SHEET AND METHOD OF MANUFACTURING THE SAME | 01-14-2016 |
| 20160032432 | HIGH-PERFORMANCE LOW-ALLOY WEAR-RESISTANT STEEL AND METHOD OF MANUFACTURING THE SAME - A high-performance low-alloy wear-resistant steel sheet and a method of manufacturing the same, which has the chemical compositions (wt %): C: 0.21-0.32%; Si: 0.10-0.50%; Mn: 0.60-1.60%; B: 0.0005-0.0040%; Cr: less than or equal to 1.50%; Mo: less than or equal to 0.80%; Ni: less than or equal to 1.50%; Nb: less than or equal to 0.080%; V: less than or equal to 0.080%; Ti: less than or equal to 0.060%; Al: 0.010-0.080%, Ca: 0.0010-0.0080%, N: less than or equal to 0.0080%, O: less than or equal to 0.0080%, H: less than or equal to 0.0004%, P: less than or equal to 0.015%, S: less than or equal to 0.010%, and (Cr/5+Mn/6+50B): more than or equal to 0.20% and less than or equal to 0.55%; (Mo/3+Ni/5+2Nb): more than or equal to 0.02% and less than or equal to 0.45%; (Al+Ti): more than or equal to 0.01% and less than or equal to 0.13%, the remainders being Fe and unavoidable impurities. The wear-resistant steel sheet of the present invention obtained by the above-mentioned compositions and TMCP process, has high strength, high hardness, good toughness, excellent wear-resistant performance, and is applicable to wearing parts in various mechanical equipments. | 02-04-2016 |
| 20160060721 | ABRASION RESISTANT STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS AND HYDROGEN EMBRITTLEMENT RESISTANCE AND METHOD FOR MANUFACTURING THE SAME - Abrasion resistant steel plates with excellent low-temperature toughness and hydrogen embrittlement resistance having a Brinell hardness of 401 or more, and methods for manufacturing such steel plates. The steel plates have a lath martensitic structure with an average grain size of not more than 20 μm, and the steel plates include fine precipitates that are 50 nm or less in diameter and that have a density of 50 or more particles per 100 μm | 03-03-2016 |
| 20160076118 | ABRASION RESISTANT STEEL PLATE HAVING EXCELLENT LOW-TEMPERATURE TOUGHNESS AND METHOD FOR MANUFACTURING THE SAME - Abrasion resistant steel plates with excellent low-temperature toughness having a Brinell hardness of 361 or more, and methods for manufacturing such steel plates. The steel plates have a lath martensitic structure with an average grain size of not more than 20 μm, and the steel plates include fine precipitates that are 50 nm or less in diameter and that have a density of 50 or more particles per 100 μm | 03-17-2016 |
| 20160194730 | HIGH-IMPACT-TOUGHNESS STEEL RAIL AND PRODUCTION METHOD THEREOF | 07-07-2016 |
