| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148601000 |
With coiling or treating of coiled strip
| 139 |
| 148648000 |
With working
| 77 |
| 148645000 |
With flattening, straightening, or tensioning by external force
| 74 |
| 148605000 |
Nine percent or more chromium(Cr) (e.g., Stainless steel, etc.)
| 72 |
| 148590000 |
Pipe or tube
| 52 |
| 148595000 |
Wire, rod, or filament
| 44 |
| 148660000 |
Including cooling (e.g., quenching, etc.)
| 35 |
| 148622000 |
Ageing, solution treating (i.e., for hardening), precipitation hardening or strengthening
| 31 |
| 148581000 |
Railway stock (e.g., rails, wheels, axles, etc.)
| 19 |
| 148621000 |
Highly alloyed (i.e., greater than 10 percent alloying elements)
| 13 |
| 148639000 |
Localized or zone heating or cooling
| 12 |
| 148580000 |
Spring or spring material
| 11 |
| 148625000 |
Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum
| 10 |
| 148619000 |
Containing 10 percent or more manganese(Mn) (e.g., Hadfield steel, etc.)
| 9 |
| 148612000 |
Starting material contains 1.7 percent or more carbon (e.g., cast iron, etc.)
| 8 |
| 148587000 |
Threaded article (e.g., screws, drill bits, etc.) | 3 |
| 20080210351 | Formed product and method for production thereof - A formed product, characterized in that it is produced by using, as a material, a steel having an ultra fine structure comprising ferrite grains having an average grain diameter of 3 μm or less and by a method comprising only a forming step and including none of refining steps; and a method for producting the above formed product with ease. The formed product contains no alloying element and has been subjected to no refining step, and has been imparted with high strength and high toughness by the above ultra fine structure. | 09-04-2008 |
| 20080216927 | High Temperature Bolt Material - A high temperature bolt material, characterized in that it is a ferrite steel comprising 8 wt % or more of Cr and having a tempered martensite structure and can be used in a high temperature region of higher than 500° C.; and a method for producing the high temperature bolt material which comprises subjecting the above-mentioned steel material to a heat treatment comprising a quenching or normalizing at a temperature of 1000° C. or higher and then to a tempering at a temperature of 730° C. or higher. The above ferrite steel high temperature bolt material is excellent in characteristics of the resistance to stress relaxation. | 09-11-2008 |
| 20150344997 | BAINITIC STEEL FOR ROCK DRILLING COMPONENT - A bainitic steel comprising, in weight % (wt %): C: 0.16-0.23, Si: 0.8-1.0, Mo: 0.67-0.9, Cr: 1.10-1.30, V: 0.18-0.4, Ni: 1.60-2.0, Mn: 0.65-0.9, P: ≦0.020, S: ≦0.02, Cu: <0.20, N: 0.005-0.012 balance Fe and unavoidable impurities. | 12-03-2015 |
| 148589000 |
Ring | 2 |
| 20100024929 | METHOD FOR THE THERMOMECHANICAL TREATMENT OF SEAMLESS RINGS PRODUCED ON RADIAL-AXIAL RING ROLLING MACHINES - A method and a device are provided for the thermomechanical treatment of seamless steel rings produced on radial-axial ring rolling machines, particularly rings of fine grain steel, heat-treatable steel, case hardened steel, or austenitic steel, preferably of steel tower flanges for wind turbine generators. The ring blank is inserted into the ring rolling machine at a temperature in the range of 900° C. to 1150° C. and is rolled to an outer diameter preferably in the range of 0.2 m to 10 m by a hot forming process. The hot ring ( | 02-04-2010 |
| 20120145289 | Piston Ring Material For Internal Combustion Engine - A piston ring material that when formed into a piston ring product, maintains excellent properties, and that at the production of piston ring rod, realizes excellent processability and shape stability. There is provided a piston ring material for internal combustion engine comprising, by mass, 0.5 to less than 0.7% C, 1.0% or less Si, 1.0% or less Mn, 12.0 to 16.0% Cr, 3.0% or less Mo and/or W (Mo+½W), 0.02 to 0.14% N and the balance Fe and unavoidable impurities, wherein the relationship of contained C, N and Cr satisfies the formulae: 25≦43.22C (%)+42.45N (%)−0.02Cr (%)≦40, and 0.15≦0.92C (%)+0.67N (%)−0.03Cr (%)≦0.30. | 06-14-2012 |
| 148655000 |
With separate handling or treating of air, water, or unspecified fluid treating media | 2 |
| 20080277035 | Method and Device for Quenching Flat Steel Products - An apparatus for quenching flat steel products includes a roller conveyor for such flat steel products. The roller conveyor includes upper and lower rollers. At least one nozzle device is arranged above the roller conveyor, and transversely to it, for spraying water onto the flat steel products. At least one suction removal device is arranged above the roller conveyor, and transversely to it, for removing water by suction upstream of an associated upper roller. A method of quenching flat steel products is also provided. | 11-13-2008 |
| 20150114528 | METHOD OF LOWERING DEW POINT OF AMIBIENT GAS WITHIN ANNEALING FURNACE, DEVICE THEREOF, AND METHOD OF PRODUCING COLD-ROLLED ANNEALED STEEL SHEET - Part of an ambient gas in a heating zone and/or a soaking zone is sucked out and is cooled through a high-temperature gas passage of a heat exchanger by heat exchange with a gas in a low-temperature gas passage, further cooled by mixing with part of an ambient gas in a cooling zone, further cooled through a gas cooler, dehumidified to a dew point of −45° C. or less in a dryer, heated through the low-temperature gas passage of the heat exchanger by heat exchange with a gas in the high-temperature gas passage, and returned to the heating zone and/or the soaking zone. | 04-30-2015 |
| 148604000 |
Of stacked plural workpieces | 1 |
| 20180023161 | HIGH-STRENGTH STEEL SHEET AND PRODUCTION METHOD THEREFOR | 01-25-2018 |
| 148586000 |
Gear | 1 |
| 20130248058 | Heat Treatment Process for Engine Ring Gear - The present disclosure relates to methods of hardening toothed gear parts for engines. The method results in a uniformly hardened gear with minimized distortion. | 09-26-2013 |
| 148646000 |
With restraining of metal from expanding or contracting during heating or cooling | 1 |
| 20140041771 | ANNULAR WORKPIECE QUENCHING METHOD AND QUENCHING APPARATUS USED IN THE METHOD - An annular workplace quenching method includes: cooling an annular workpiece with an inner die arranged radially inward of the workpiece heated at a quenching temperature; pressing the workpiece in a width direction at a low pressure and inserting the workpiece in an outer die with restraint of an inner peripheral surface of the workpiece continued, when the restraint is started by contact with the inner die, after a temperature of the workpiece is decreased to 500° C. or lower but before the temperature is decreased to a martensitic transformation start temperature (Ms point); and restraining the workpiece in the width direction by pressing the workpiece in the width direction at a high pressure, and restraining an outer peripheral surface of the workpiece that undergoes volume expansion due to martensitic transformation, using the outer die, after the temperature of the workpiece is decreased to the Ms point or lower. | 02-13-2014 |
| Entries |
| Document | Title | Date |
|---|
| 20080202651 | Method For Manufacturing High-Density Iron-Based Compacted Body and High-Density Iron-Based Sintered Body - An iron-based compact having a high density and also an iron-based sintered body having a high strength and a high density are manufactured with a high productivity by pre-compacting an iron-based mixed powder prepared by mixing an iron-based metal powder and a graphite powder; pre-sintering the resulting pre-compacted iron-based mixed powder at a temperature higher than 1000° C. but not higher than 1300° C. to produce a sintered iron-based powder preform containing C: 0.10 to 0.50 mass %, O: 0.3 mass % or less, and N: 0.010 mass % or less and having a density of 7.2 Mg/m | 08-28-2008 |
| 20080236709 | COLD-WORKED STEELS WITH PACKET-LATH MARTENSITE/AUSTENITE MICROSTRUCTURE - Strain-hardened steel alloys having a high tensile strength are prepared by cold working of alloys whose microstructure includes grains in which laths of martensite alternate with thin films of stabilized austenite. Due to the high dislocation density of this microstructure and the tendency of the strains to move between the martensite and austenite phases, the strains created by cold working provide the microstructure with unique mechanical properties including a high tensile strength. Surprisingly, this is achieved without the need for intermediate heat treatments (patenting, in the case of steel wire) of the steel between cold working reductions. | 10-02-2008 |
| 20080264528 | ROLLING, SLIDING PART AND PROCESS FOR PRODUCING SAME - A rolling, sliding part is made from a bearing steel, and the rolling, sliding surface thereof has a surface layer portion which is 56 to 64 in Rockwell C hardness, up to 12 vol. % in retained austenite content and 4 to 6 degrees in the X-ray half value width of martensite. Even if made from a common bearing steel, the rolling, sliding part is reduced in the likelihood of developing a WEA or like fatigue structure, consequently exhibiting a prolonged rolling, sliding life for use under severe conditions involving a high temperature, high speed, high load or high vibration. | 10-30-2008 |
| 20090188591 | PROCESS FOR THE HEAT TREATMENT OF STEEL PRODUCTS - The invention provides a process for the heat treatment of steel products, in particular of steel strips or sheets, in which the product is brought from a starting temperature to a target temperature in a booster zone having at least one burner; the burner is operated with a fuel, in particular a fuel gas, and an oxygen-containing gas which contains more than 21% oxygen; and the product is brought into direct contact with the flame generated by the burner, the air ratio λ within the flame being set as a function of the starting temperature and/or the target temperature. | 07-30-2009 |
| 20090194207 | Cooling Method of Steel Plate - A cooling method of steel plate able to raise a cooling uniformity in a steel plate conveyance direction comprising, at a front stage part of a cooling apparatus, not spraying while a front end region of steel plate is passing, spraying by successively increasing the cooling water rate from 80 to 95 vol % (Q | 08-06-2009 |
| 20090277542 | STEEL MATERIAL FOR AUTOMOBILE CHASSIS PARTS SUPERIOR IN FATIGUE CHARACTERISTICS AND METHOD OF PRODUCTION OF AUTOMOBILE CHASSIS PARTS USING THE SAME - The present invention provides a steel material for automobile chassis parts which has high fatigue characteristics, does not require much cost for heat treatment, and further is superior in shapeability and a method of production of automobile chassis parts using this steel material, that is, one being a steel material to which Nb and Mo have been compositely added and having a difference 50 to 150 points between a Vicker's hardness of the center of plate thickness and a maximum value of Vicker's hardness within 0.5 mm from the surface after bending by a bending R of the plate outer surface of 2 to 5 times the plate thickness. The surface is high in hardness and the center part is low in hardness, so the fatigue characteristics and shapeability are superior. Note that if annealing under conditions giving a tempering parameter λ defined by λ=T(20+log(t)) of 14000 to 19000 (where T is the absolute temperature, t is the time (h), and the temperature rise is 660° C.), it is possible to relieve the internal stress and further improve the fatigue characteristics. | 11-12-2009 |
| 20100065164 | System and method for annealing nuclear fission reactor materials - Illustrative embodiments provide systems, methods, apparatuses, and applications related to annealing nuclear fission reactor materials. | 03-18-2010 |
| 20100065165 | System and method for annealing nuclear fission reactor materials - Illustrative embodiments provide systems, methods, apparatuses, and applications related to annealing nuclear fission reactor materials. | 03-18-2010 |
| 20100147423 | STEEL ALLOY FOR MACHINE COMPONENTS - A machine component or part for alternating mechanical stresses up to a temperature of at most 160° C. The component or part comprises a thermally quenched and tempered steel alloy which comprises carbon, silicon, manganese, chromium, molybdenum and vanadium in certain concentrations, the remainder being iron (Fe) and accompanying elements and contaminants due to smelting. This abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way. | 06-17-2010 |
| 20110005645 | AUSTENITIC STAINLESS STEEL, AND METHOD FOR REMOVING HYDROGEN THEREFROM - The present invention focuses on diffusible hydrogen and non-diffusible hydrogen that cause hydrogen embrittlement in an austenitic stainless steel, and provides the austenitic stainless steel having diffusible hydrogen and non-diffusible hydrogen removed therefrom, and a method for removing hydrogen therefrom. In order to remove diffusible hydrogen and non-diffusible hydrogen, which cause hydrogen embrittlement in the austenitic stainless steel, an aging treatment is performed to the austenitic stainless steel at a temperature ranging from 200 to 1100° C. while being kept in an air atmosphere. As a result, the hydrogen (H) content in the austenitic steel is removed to 0.001 wt % (1 wt ppm) or less. | 01-13-2011 |
| 20110174419 | SYSTEM AND METHOD FOR ANNEALING ALLOY STEEL COMPONENTS - A system for heat treating an alloy steel component includes a first enclosure and a second enclosure opposed to the first enclosure. The first and second enclosures define a chamber around only a portion of the alloy steel component. The system further includes a heating element in the chamber to heat the portion of the alloy steel component. A method for heat treating an alloy steel component includes placing a first enclosure against a first side of the alloy steel component and placing a second enclosure against a second side of the alloy steel component. The method further includes creating a substantially airtight chamber around only a portion of the alloy steel component between the first and second enclosures and heating the portion of the alloy steel component inside the substantially airtight chamber. | 07-21-2011 |
| 20120199254 | ALLOY COMPOSITION, FE-BASED NANO-CRYSTALLINE ALLOY AND FORMING METHOD OF THE SAME - An alloy composition of Fe | 08-09-2012 |
| 20130048157 | METHOD FOR MANUFACTURING HIGH-Si COLD ROLLED STEEL SHEET HAVING EXCELLENT CHEMICAL CONVERSION PROPERTIES - A method for manufacturing high-Si cold rolled steel sheets includes heating a cold rolled steel sheet with a direct flame burner (A) having an air ratio of not more than 0.89 when the temperature of the cold rolled steel sheet that is being increased is in the temperature range of not less than 300° C. and less than Ta° C., subsequently heating the cold rolled steel sheet with a direct flame burner (B) having an air ratio of not less than 0.95 when the temperature of the cold rolled steel sheet is in the temperature range of not less than Ta° C. and less than Tb° C., and subsequently soak-annealing the cold rolled steel sheet in a furnace having an atmospheric gas composition which has a dew point of not more than −25° C. and contains 1 to 10 volume % of H | 02-28-2013 |
| 20130174945 | BEARING STEEL AND INGOT MATERIAL FOR BEARING HAVING EXCELLENT ROLLING CONTACT FATIGUE LIFE CHARACTERISTICS AND METHOD FOR MANUFACTURING THE SAME - The present invention provides bearing steel, comprising a chemical composition including by mass %, C: 0.56%≧[% C]≦0.70%, Si: 0.15%≦[% Si]<0.50%, Mn: 0.60%≦[% Mn]≦1.50%, Cr: 0.50%≦[% Cr]≦1.10%, Mo: 0.05%≦[% Mo]≦0.5%, P: [% P]≦0.025%, S: [% S]≦0.025%, Al: 0.005%≦[% Al]≦0.500%, O: [% O]≦0.0015%, N: 0.0030%≦[% N]≦0.015%, and remainder as Fe and incidental impurities. | 07-11-2013 |
| 20130174946 | HIGH STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME - A method for manufacturing such steel sheet includes continuous annealing of a steel sheet which includes, in terms of mass %, C at 0.01 to 0.18%, Si at 0.4 to 2.0%, Mn at 1.0 to 3.0%, Al at 0.001 to 1.0%, P at 0.005 to 0.060% and S at ≦0.01%, the balance being represented by Fe and inevitable impurities, in such a manner that the dew point of the atmosphere is controlled to become not more than −45° C. during the course of soaking when the annealing furnace inside temperature is in the range of not less than 820° C. and not more than 1000° C. as well as that the dew point of the atmosphere is controlled to become not more than −45° C. during the course of cooling when the annealing furnace inside temperature is in the range of not less than 750° C. | 07-11-2013 |
| 20130255844 | PRIMARY MATERIAL FOR MOLDS ADAPTED TO MOLD PLASTICS - A mold material having a material hardness higher than 340 HB and a fine-grain structure. The mold material having a composition in weight percent that includes:
| 10-03-2013 |
| 20130306203 | HIGH STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME - The invention provides a high strength steel sheet which exhibits excellent chemical convertibility and corrosion resistance after electrodeposition coating even in the case where the steel sheet has a high Si content, and a method for manufacturing such steel sheets. The method includes continuous annealing of a steel sheet which includes, in terms of mass %, C at 0.01 to 0.18%, Si at 0.4 to 2.0%, Mn at 1.0 to 3.0%, Al at 0.001 to 1.0%, P at 0.005 to 0.060% and S at ≦0.01%, the balance being represented by Fe and inevitable impurities, while controlling the dew-point temperature of the atmosphere to become not more than −40° C. when the annealing furnace inside temperature is in the range of not less than 750° C. | 11-21-2013 |
| 20130327452 | HIGH STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME - The invention provides a high strength steel sheet which exhibits excellent chemical convertibility and corrosion resistance after electrodeposition coating even in the case where the steel sheet has a high Si content, and a method for manufacturing such steel sheets. The method includes continuous annealing of a steel sheet which includes, in terms of mass %, C at 0.01 to 0.18%, Si at 0.4 to 2.0%, Mn at 1.0 to 3.0%, Al at 0.001 to 1.0%, P at 0.005 to 0.060% and S at ≦0.01%, the balance being represented by Fe and inevitable impurities, while controlling the dew-point temperature of the atmosphere to become not less than −10° C. when the heating furnace inside temperature is in the range of not less than A° C. and not more than B° C. during the course of heating (A: 600≦A≦780, B: 800≦B≦900). | 12-12-2013 |
| 20140202599 | METHOD FOR PRODUCING ORIENTED MAGNETIC STEEL SHEET - In a method of producing a grain-oriented electrical steel sheet by subjecting a coil for grain-oriented electrical steel sheet after cold rolling to a primary recrystallization annealing, applying an annealing separator thereon, and conducting final annealing, rapid heating is conducted at a rate of not less than 80° C./sec from 500° C. to 700° C. in the course of heating for the primary recrystallization annealing, and a temperature keeping treatment is conducted for 2 to 100 hours from 700° C. to 1000° C. in the course of heating for the final annealing, and further, the final annealing is preferably conducted by laying a thermal insulation material on an upper surface of a coil supporting stand in an annealing furnace used for the final annealing concentrically from the outer periphery of the coil supporting stand and over an area of not less than 20% of the radius of the coil supporting stand. | 07-24-2014 |
| 20150322557 | METHOD FOR POST-BUILT HEAT TREATMENT OF ADDITIVELY MANUFACTURED COMPONENTS MADE OF GAMMA-PRIME STRENGTHENED SUPERALLOYS - The invention relates to a method of post-built up heat treatment of an additively manufactured high strength component made of a gamma-prime strengthened superalloy based on Ni or Co or Fe or combinations thereof. An application of a rapid heating-up rate of 25 to 60° C./min in a specific temperature range during the first post-built heat treatment after additive manufacturing avoids or at least minimizes the gamma-prime precipitation in the component during heat-up. This results in crack-free components/articles compared to significant cracking present in conventionally heat treated components. | 11-12-2015 |
| 20160130689 | AUSTENITIC STEEL MATRIX-NANOPARTICLE COMPOSITE AND PRODUCING METHOD THEREOF - An austenitic steel matrix-nanoparticle composite and a producing method thereof are provided. The composite includes: an austenitic steel matrix that includes an alloying element; and a nanoparticle that grows in situ in the matrix and that is formed in the matrix. The nanoparticle grows from the alloying element included in the austenitic steel matrix. The method includes: preparing an austenitic steel matrix including an alloying element; and heating the austenitic steel matrix. In the method, the nanoparticle grows in situ in the matrix from the alloying element which is solid-dissolved in the austenitic steel matrix by the heating. | 05-12-2016 |
