| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148325000 |
Nine percent or more chromium containing
| 24 |
| 148330000 |
Beryllium or boron containing
| 20 |
| 148333000 |
Chromium containing, but less than 9 percent
| 14 |
| 148332000 |
Copper containing
| 13 |
| 148328000 |
Age or precipitation hardened or strengthed
| 13 |
| 148331000 |
Rare earth meal containing | 5 |
| 20090194204 | STEEL FOR HIGH-CLEANLINESS SPRING WITH EXCELLENT FATIGUE CHARACTERISTICS AND HIGH-CLEANLINESS SPRING - High cleanliness spring steel useful in manufacturing a spring with SiO | 08-06-2009 |
| 20110005643 | COLD ROLLED STEEL SHEET - Provided are the following cold-rolled steel sheets: 1) a cold-rolled steel sheet having higher stretch flangeability than conventional steels; 2) a cold-rolled steel sheet having a higher balance between elongation and stretch flangeability than conventional steels; and 3) a cold-rolled steel sheet heightened in all of yield stress, elongation, and stretch flangeability. The cold-rolled steel sheets are characterized by containing 0.03-0.30 mass % carbon, up to 3.0 mass % (including 0 mass %) silicon, 0.1-5.0 mass % manganese, up to 0.1 mass % phosphorus, less than 0.01 mass % sulfur, up to 0.01 mass % nitrogen, and 0.01-1.00 mass % aluminum and having a structure which comprises tempered martensite in an amount of 50% or more (including 100%) in terms of areal proportion and in which the remainder is ferrite. The steel sheets are further characterized in that at least one of the following structural factors has been regulated: the proportions of cementite particles and of the ferrite grains in the tempered martensite and the dislocation density in all structures. | 01-13-2011 |
| 20130192724 | STEEL SHEET AND A METHOD FOR ITS MANUFACTURE - A high-strength steel sheet has a chemical composition comprising C: 0.05-0.20%, Si: 0.02-3.0%, Mn: 0.5-3.0%, P: at most 0.5%, S: at most 0.05%, Cr: 0.05-1.0%, sol. Al: 0.01-1.0%, one or more elements selected from the group consisting of Ti, Nb, Mo, V, and W: a total of 0.002-0.03%, and a remainder of Fe and impurities. The sheet has an average grain diameter of ferrite of at most 3.0 μm at least in a region of 100-200 μm in the sheet thickness direction from the surface of the steel sheet. The average spacing in the sheet thickness direction of the remaining structure in this region is at most 3.0 μm. Mechanical properties include at least | 08-01-2013 |
| 20130284319 | High Strength, High Toughness Steel Alloy - A high strength, high toughness steel alloy is disclosed. The alloy has the following weight percent composition. | 10-31-2013 |
| 20150329932 | HOT-ROLLED STEEL SHEET EXHIBITING EXCELLENT COLD FORMABILITY AND EXCELLENT SURFACE HARDNESS AFTER FORMING - Disclosed is a hot-rolled steel sheet that has a thickness of 3 to 20 mm and includes, in a chemical composition in mass percent, C of 0.3% or less (excluding 0%), Si of 0.5% or less (excluding 0%), Mn of 0.2% to 1%, P of 0.05% or less (excluding 0%), S of 0.05% or less (excluding 0%), Al of 0.01% to 0.1%, and N of 0.008% to 0.025%, with the remainder consisting of iron and inevitable impurities. A solute nitrogen content is 0.007% or more, and the carbon and nitrogen contents meet a condition as specified by 10C+N≦3.0. The microstructure of the steel sheet includes pearlite of less than 20% in area percentage, with the remainder approximately consisting of ferrite. The average grain size of the ferrite is 3 to 35 μm. The steel sheet has good cold formability during forming and still has predetermined surface hardness after forming. | 11-19-2015 |
| 148321000 |
1.7 percent or more carbon containing (e.g., cast iron) | 4 |
| 20080308193 | Heat-Resistant Cast Iron And Exhaust Equipment Member Formed Thereby - A graphite-containing, heat-resistant cast iron for exhaust equipment members used at temperatures exceeding 800° C., comprising 3.5-5.6% of Si and 1.2-15% of W on a weight basis, and having intermediate layers, in which W and Si are concentrated, in the boundaries of graphite particles and a matrix. An exhaust equipment member formed by this heat-resistant cast iron has an A | 12-18-2008 |
| 20110094632 | LEDEBURITE CAST IRON WITH A HIGH CARBIDE CONTENT AND AN EVENLY DISTRIBUTED GRAPHITE EMBODIMENT - Disclosed is a cast iron material, especially a ledeburite cast iron material which has a high carbide content of at least 15.0 percent by weight and is provided with a characteristic, free, evenly distributed graphite embodiment that can comprise flake graphite and/or vermicular graphite and/or nodular graphite. The basic matrix can be embodied in a pearlitic and/or bainitic and/or martensitic manner according to the application thereof (diameter (D) of the seal of the running gear, peripheral velocity). The thermal conductivity of the inventive material is three to four times greater than that of white cast materials as a result of the high graphite content, thus advantageously preventing seals of running gears from fretting in case of great peripheral velocities (>5 m/s) and large diameters (D>600 mm) of the seals. Additionally, the high carbide content of at least 15 percent by weight provides for good resistance to wear while additional alloying elements such as chromium, vanadium, molybdenum, and nickel provide the material with adequate resistance to corrosion. The disclosed ledeburite cast iron material featuring an evenly distributed graphite embodiment can be used for producing axial face seals and cylinder hushes, for example. | 04-28-2011 |
| 20110297277 | STEEL ALLOY AND TOOLS OR COMPONENTS MANUFACTURED OUT OF THE STEEL ALLOY - The invention relates to a powder metallurgically manufactured steel with a chemical composition containing, in % by weight: 0.01-2 C, 0.6-10 N, 0.01-3.0 Si, 0.01-10.0 Mn, 16-30 Cr, 0.01-5 Ni, 0.01-5.0 (Mo+W/2), 0.01-9 Co, max. 0.5 S and 0.5-14 (V+Nb/2), where the contents of N on the one hand and of (V+Nb/2) on the other hand are balanced in relation to each other such that the contents of these elements are within an area that is defined by the coordinates A′, 13% G, H, A′, where the coordinates of [N, (V+Nb/2)] are: A′: [0.6,0.5]; B′: [1.6,0.5]; G: [9.8,14.0]; H: [2.6,14.0], and max. 7 of (Ti+Zr+Al), balance essentially only iron and impurities at normal amounts. The steel may be used for tools for injection moulding, compression moulding and extrusion of components of plastics, and cold working. | 12-08-2011 |
| 20110041960 | HIGH RIGIDITY, HIGH DAMPING CAPACITY CAST IRON - A high rigidity, high damping capacity cast iron, which is a cast iron containing 3 to 7% of Al, and produced by heating at 280 to 630° C. after casting, and then cooling. | 02-24-2011 |
| 148329000 |
Eight percent or more manganese containing | 1 |
| 20090165897 | AUSTENITIC STEEL HAVING HIGH STRENGTH AND FORMABILITY, METHOD OF PRODUCING SAID STEEL AND USE THEREOF - Substantially austenitic steel having high strength and good formability for cold rolling including (in weight percent): 0.05 to 1.0% C; 11.0 to 14.9% Mn; 1.0 to 5.0% Al; O to 2.5% Ni the remainder being iron and unavoidable impurities, wherein the microstructure includes at least 75% in volume of austenite, and wherein (Ni+Mn) is from 11.0 to 15.9%. | 07-02-2009 |
| Entries |
| Document | Title | Date |
|---|
| 20090014095 | HIGH-STRENGTH COLD ROLLED STEEL SHEET EXCELLING IN CHEMICAL TREATABILITY - The invention provides a high strength cold rolled steel sheet having excellent chemical conversion treatment property stably even Mo is added aiming high strengthening. The surface property of the cold rolled steel sheet satisfies that the characteristic of 10 μm or more of the maximum depth (Ry) of the unevenness and 30 μm or less of the average spacing (Sm) of the unevenness, and that either one or more preferably both of, the characteristic of the load length ratio (tp40) of the unevenness of the surface is 20% or less, and the characteristic of the difference of the load length ratios (tp60) and (tp40) is 60% or more, is satisfied, and the crack of 3 μm or less width and 5 μm or more depth does not exist on the surface. | 01-15-2009 |
| 20090120535 | METHOD OF BONDING STEEL MEMBERS, METHOD OF ENHANCING BONDING STRENGTH OF UNITED BODY FORMED OF STEEL MEMBERS, STEEL PRODUCT, AND DIE-CAST PRODUCT - The present invention provides a method of bonding steel members by bonding a plurality of steel members made of a Cr-containing steel material to each other. The method includes a united body forming step S | 05-14-2009 |
| 20090199933 | SIDE RAIL FOR A SHREDDER WITH EMBEDDED FINGERS - A side rail for installation in a shredder and method of fabrication in which the side rail has fingers that are partially embedded in a base. The fingers are made from steel and the base is made from cast aluminum. The fingers have a dovetail shape at an outer end thereof that is immersed in molten aluminum in a mold. When the aluminum is allowed to harden the fingers are embedded in the base. The side rails are much lighter weight than previous side rails, and are still sufficiently strong to be used in a mobile shredder. | 08-13-2009 |
| 20090205753 | High strength spring-use heat treated steel - The present invention provides spring-use heat treated steel which is cold coiled, can achieve both sufficient atmospheric strength and coiling workability, has a tensile strength of 2000 MPa or more, and can improve the performance as a spring by heat treatment after shaping the spring, that is, heat treated steel for high strength spring containing, by mass %, C: 0.45 to 0.9%, Si: 1.0 to 3.0%, Mn: 0.1 to 2.0%, V: over 0.1 to 1.0%, N: limited to 0.007% or less, and a balance of Fe and unavoidable impurities, and satisfying, in terms of the analyzed value of the extracted residue after heat treatment, [amount of V in filtrate filtered by 0.2 μm filter (mass %)]≧[amount of V in steel (mass %)]×0.4. | 08-20-2009 |
| 20090223603 | METHOD FOR MANUFACTURING FERRITIC STAINLESS STEEL SLABS WITH EQUIAXED GRAIN STRUCTURES AND THE FERRITIC STAINLESS STEEL MANUFACTURED BY IT - Disclosed is a method for manufacturing ferritic stainless steel slabs with equiaxed grain structures and the ferritic stainless steel manufactured by it, which control concentration of alumina inclusions in molten steel to maximize an available TiN generation effect serving as a non-uniform nucleating site of ferrite when solidifying it, thereby improving equiaxed crystal ratio, the method comprising the steps of: performing oxygen decarburization reaction by blowing oxygen from the upper part of the molten steel in a vacuum oxygen decarburization ladle; injecting Al in the molten steel to which the oxygen decarburization reaction is made for Cr | 09-10-2009 |
| 20090301609 | High-Strength Non-Oriented Electrical Steel Sheet - The invention provides a non-oriented electrical steel sheet excellent in yield strength for use as an iron core material for high rpm motors that does not sacrifice yield or productivity in motor core punching or steel sheet production, which non-oriented electrical steel sheet is given a chemical composition of, in mass %, C: 0.01 to 0.05%, Si: 2.0 to 4.0%, Mn: 0.05 to 0.5%, Al: 3.0% or less and Nb: 0.01 to 0.05%, and optionally Ni at a preferable content of more than 0.5% and less than 3.0%, the balance being Fe and unavoidable impurities, Mn and C contents expressed in mass % are made to satisfy Mn≦0.6−10×C, recrystallized portion area fraction is made 50% or greater, yield strength in tensile testing is made 650 MPa or greater, and average-grain diameter viewed in steel sheet cross-section is made 40 μm or less, and electrical steel sheet production is conducted using a hot-rolled sheet whose transition temperature in impact testing is 70° C. or less. | 12-10-2009 |
| 20100018612 | MG-BASED ALLOY PLATED STEEL MATERIAL - An Mg-based alloy plated steel material superior in adhesion and corrosion resistance characterized by being provided with a hot dip Mg-based alloy plating layer (preferably containing Zn: 15 atm % to less than 45 atm %). | 01-28-2010 |
| 20100024923 | SI-KILLED STEEL WIRE ROD AND SPRING - A Si-killed steel wire rod for obtaining a spring excellent in fatigue properties and a spring excellent in fatigue properties obtained from such steel wire rod are provided. In the Si-killed steel wire rod of the present invention, oxide-based inclusions present in the wire rod contain SiO | 02-04-2010 |
| 20110017354 | MATERIALS FOR THE PRODUCTION OF ECOLOGICAL AMMUNITION AND OTHER APPLICATIONS - The present invention provides an ODS type material (Oxide dispersion strengthened or particle dispersion) which comprises an alloy metal matrix and a dispersion of strengthening particles distributed therein which provide the same with optimum density and deformability. Said metal matrix is constituted by an alloy of zinc and bismuth, of zinc and aluminium, of tin and bismuth, or of tin and zinc, the strengthening material being of tungsten or ferro tungsten, oxides of both, carbides of both, or derivatives of the same. Said new material can substitute for lead in the production of ecological ammunition, hooks for fishing, inertial counterweights in automobiles, X-rays and ionising radiation screens, golf sticks, water pipes and plumbing fittings, as well as in electrical and magnetic applications. The invention also provides an ecological ammunition manufactured from said composite material, such as, for example, pellets. | 01-27-2011 |
| 20120012230 | STAINLESS-STEEL SEAMLESS BELT AND MANUFACTURING METHOD THEREFOR, FIXING BELT AND HEAT FIXING APPARATUS - Provided is a stainless-steel seamless belt formed by subjecting a stainless-steel plate to a plastic forming process and having a thickness of 50 μm or less. The seamless belt has a bending durability of 100,000 or more times in a specific bending test and has a Vickers hardness of 450 (Hv) or more. | 01-19-2012 |
| 20120037279 | STRUCTURAL MATERIAL - A structural material is provided, the strength and toughness of which are well-balanced at a high level, suitable in particular for seat frames in automobiles, aircrafts and the like. Specifically disclosed is a structural material produced by integrally joining thin steel members in a part thereof and, after joining, thermally heating a part thereof so that the heat-treated part differs from the other parts in strength and toughness. Unlike a structural material, the strength of which as a whole has been uniformly improved by heat treatment, the above-described structural material consists of a part having a high strength and a part having low strength. Thus, a structural material, the strength and toughness of which are well-balanced at a high level can be obtained. Since the strength and toughness are well-balanced at a high level, the structural material is suitable particularly for seat frames in automobiles, aircrafts and the like. | 02-16-2012 |
| 20120298263 | METHOD OF MAKING HYPEREUTECTOID, HEAD-HARDENED STEEL RAIL - A method of making a hypereutectoid, head-hardened steel rail is provided that includes a step of head hardening a steel rail having a composition containing 0.86-1.00 wt % carbon, 0.40-0.75 wt % manganese, 0.40-1.00 wt % silicon, 0.05-0.15 wt % vanadium, 0.015-0.030 wt % titanium, and sufficient nitrogen to react with the titanium to form titanium nitride. Head hardening is conducted at a cooling rate that, if plotted on a graph with xy-coordinates with the x-axis representing cooling time in seconds, and the y-axis representing temperature in Celsius of the surface of the head of the steel rail, is maintained in a region between an upper cooling rate boundary plot defined by an upper line connecting xy-coordinates (0 s, 775° C.), (20 s, 670° C.), and (110 s, 550° C.) and a lower cooling rate boundary plot defined by a lower line connecting xy-coordinates (0 s, 750° C.), (20 s, 610° C.), and (110 s, 500° C.). | 11-29-2012 |
| 20150041023 | Fe-BASED METAL PLATE AND METHOD OF MANUFACTURING THE SAME - On at least one surface of a base metal plate ( | 02-12-2015 |
