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| Number | Title | Issue Date |
| 7918948 | Method of production of 780 MPa class high strength steel plate excellent in low temperature toughness A method of production of 780 MPa class high strength steel plate excellent low temperature toughness comprising heating a steel slab of containing, by mass %, C: 0.06 to 0.15%, Si: 0.05 to 0.35%, Mn: 0.60 to 2.00%, P: 0.015% or less, S: 0.015% or less, Cu: 0.1 to 0... | 04/05/2011 |
| 7435307 | Fe-Ni based permalloy and method of producing the same and cast slab A Fe—Ni based permalloy comprises Ni: 30-85 wt %, C: not more than 0.015 wt %, Si: not more than 1.0 wt %, Nin: not more than 1.0 wt %, P: not more than 0.01 wt %, S: not more than 0.005 wt %, O: not more than 0.0060 wt %, Al: not more than 0.02 wt % and, if neces... | 10/14/2008 |
| 7431781 | Method for forming a common-rail injection system for diesel engine A common-rail injection system is provided for a diesel engine and has excellent internal pressure fatigue resisting characteristics, vibrational fatigue resisting characteristics and cavitation resisting property and sheet face flawing resisting property, and can b... | 10/07/2008 |
| 7429302 | Stainless steel sheet for welded structural components and method for making the same A structural hot-rolled or cold-rolled stainless steel sheet having improved intergranular corrosion resistance and toughness at the welding heat affected zone and further having low strength and high elongation. The composition of the steel sheet contains less than... | 09/30/2008 |
| 7361235 | Method for producing dispersed oxide reinforced ferritic steel having coarse grain structure and being excellent in high temperature creep strength A method of manufacturing an oxide dispersion strengthened ferritic steel excellent in high-temperature creep strength having a coarse grain structure. The method comprises mixing alloy powders and an Y2O3 powder, subjecting the mixed powder to... | 04/22/2008 |
| 7288158 | Manufacturing process for producing high strength steel product with improved formability A flat rolled, high strength, formable steel product has a yield strength of at least about 100 ksi. The product has sufficient formability such that it can withstand a longitudinal or transverse 180° bend of less than 1.0 times its thickness and is preferably comp... | 10/30/2007 |
| 7074497 | Coated steel sheet and method for manufacturing the same A coated steel sheet having a coated layer on surfaces of a steel sheet of a composition containing not less than 0.1 mass % and under 3 mass % of Al, wherein a following condition A or B is met: A: An AlN precipitate layer exists on a matr... | 07/11/2006 |
| 6982012 | Method of manufacturing steel sheet having excellent workability and shape accuracy A method of manufacturing a high strength steel sheet containing, in mass %, C: 0.02 to 0.04%, Si: at most 0.4%, Mn: 0.5-3.0%, P: at most 0.15%, S: at most 0.03%, Al: at most 0.50%, N: at most 0.01%, and Mo: 0.01-1.0%. The method includes performing hot rough rollin... | 01/03/2006 |
| 6962631 | Steel plate excellent in shape freezing property and method for production thereof A ferritic steel sheet wherein a mean value of X-ray random intensity ratios of a group of {100} to {223} orientations is 3.0 or more and a mean value of X-ray random intensity ratios of three crystal orientations of {554}, {111}, and {111} ... | 11/08/2005 |
| 6896747 | Austenitic alloy for heat strength with improved pouring and manufacturing, process for manufacturing billets and wire Austenitic alloy for high-temperature strength with improved pourability and manufacturing, of which the composition comprises, in weight-%: 0.010% | 05/24/2005 |
| 6884388 | Low carbon martensitic stainless steel and method for production thereof A martensitic stainless steel sheet which is hard to be softened by tempering caused by heating during the use of a disk brake, can maintain the predetermined hardness, and has excellent punching workability, bending workability before quenching, and a particularly ... | 04/26/2005 |
| 6855216 | Method of processing and heat-treating NbC-added Fe-Mn-Si-based shape memory alloy A NbC-added Fe—Mn—Si-based shape memory alloy is provided, showing a shape memory property even if a special treatment such as training is not performed. A Fe—Mn—Si-based shape memory alloy containing Nb and C is rolled by 10 to 30% in a temperature r... | 02/15/2005 |
| 6818072 | High-strength heat-resistant steel, process for producing the same, and process for producing high-strength heat-resistant pipe A heat resistant steel can be produced at a low cost and has an excellent high temperature strength. A high-strength heat-resistant steel is provided which comprises carbon in an amount of 0.06 to 0.15% by weight, silicon in an amount of 1.5% by weight or less, mang... | 11/16/2004 |
| 6783612 | Method and apparatus for in-line heat treatment of hot rolled stock Apparatus for the rolling and heat treatment of elongated metal product of relatively small cross section, such as rods and bars, is described in which the elements required for the conduct of a variety of heat treatments are arranged in in-line disposition whereby ... | 08/31/2004 |
| 6719860 | Method of producing ultra-fine grain structure for unalloyed or low-alloyed steel A method of producing ultra-fine grain structure for an unalloyed or low-alloyed steel is characterized in that it includes as a combination steps wherein the steel is heated (1, 2) to a temperature (T1) above Ac3 temperature for transforming th... | 04/13/2004 |
| 6641931 | Method of production of cold-rolled metal coated steel products, and the products obtained, having a low yield ratio The present invention aims to produce a cold rolled metal coated multi-phase steel, characterized by a tensile strength of at least 500 MPa, a yield ratio (Re/Rm) lower than 0.65 in skinned conditions, lower than 0.60 in unskinned conditions, and with goo... | 11/04/2003 |
| 6586117 | Steel sheet having excellent workability and shape accuracy and a method for its manufacture A steel for forming a high strength steel sheet contains, in mass %, C: at most 0.04%, Si: at most 0.4%, Mn: 0.5-3.0%, P: at most 0.15%, S: at most 0.03%, Al: at most 0.50%, N: at most 0.01%, and Mo: 0.01-1.0%. Steel sheet formed from the steel is suitabl... | 07/01/2003 |
| 6517955 | High strength galvanized steel plate excellent in adhesion of plated metal and formability in press working and high strength alloy galvanized steel plate and method for production thereof The invention relates to a high strength hot-dip galvanized and galvannealed steel sheets with excellent drawability for press forming and excellent plating adhesion that is useful as a member for automobiles, construction, electric devices and the like, ... | 02/11/2003 |
| 6508893 | Method of manufacturing Fe-Ni alloy A method of manufacturing an improved Fe--Ni alloy consisting of 33-37% Ni; 0.001-0.1% Mn; optionally, 0.01-2% Co; and at least one of (1) 0.01-0.8% Nb; (2) 0.01-0.8% Ta; and/or (3) 0.01-0.8% Hf, with the total of Nb, Ta and Hf being in the range of 0.01-... | 01/21/2003 |
| 6478901 | Aluminum-killed low-carbon steel sheet for containers and method for its preparation A process for manufacturing an aluminum-killed low-carbon steel strip by supplying a hot-rolled steel strip having by weight from 0.022 to 0.035% of carbon, from 0.15 to 0.25% of manganese, from 0.040 to 0.70% of aluminum, from 0.0035 to 0.0060% of nitrog... | 11/12/2002 |
| 6464807 | Production method of ultra fine grain steel A method of producing a ultra fine grain steel made of ferrite having a mean grain size of not larger that 3 μm as the base phase, after ingoting raw materials, by austenitizing the ingot by heating it to a temperature of at least an Ac 3 point, then, ap... | 10/15/2002 |
| 6440584 | Hot-dip galvanized steel sheet and method for producing the same A hot-dip galvanized steel sheet is produced by rough rolling a steel, finish rolling the rough rolled steel at a temperature of Ar3 point or more, coiling the finish rolled steel at a temperature of 700° C. or less, and hot-dip galvanizing the coiled st... | 08/27/2002 |
| 6423426 | High tensile hot-dip zinc-coated steel plate excellent in ductility and method for production thereof A steel sheet having a composition comprising C: 0.05-0.20 mass %, Si: 0.3-1.8 mass %, Mn: 1.0-3.0 mass %, Fe of the balance and inevitable impurities is subjected to a primary step of primary heat treatment and subsequent rapid cooling to Ms point or low... | 07/23/2002 |
| 6398884 | Methods of producing steel plate, hot-dip steel plate and alloyed hot-dip steel plate This invention can form a sufficiently internal oxide layer in a surface layer portion of an iron matrix of a steel sheet by hot rolling a base steel and subjecting to a heat treatment at a temperature range of 650-950° C. in an atmosphere substantially ... | 06/04/2002 |
| 6395108 | Flat product, such as sheet, made of steel having a high yield strength and exhibiting good ductility and process for manufacturing this product A flat product made of multiphase steel and a method for preparing the steel includes hot rolling at a temperature at which the austenite phase is stable, then tempering to form a C and Mn-enriched phase in a matrix, followed by a heat treatment to form a... | 05/28/2002 |
| 6395109 | Bar product, cylinder rods, hydraulic cylinders, and method for manufacturing A bar product prepared from microalloyed bar steel is provided. The bar product is prepared by hot rolling and heat treating a microalloyed bar steel. The hot rolled and heat treated microalloyed bar steel is prepared by steps of hot rolling a preform of ... | 05/28/2002 |
| 6383317 | Process for the manufacture of a component for bearings and its products Steel for the manufacture of a component for bearings, the chemical composition of which comprises, by weight: 0.6%ࣘCࣘ1.5%; 0.4%ࣘMnࣘ1.5%; 0.75%ࣘSiࣘ2.5%; 0.2%ࣘCrࣘ2%; 0%ࣘNiࣘ0.5%; 0%ࣘMoࣘ0.2%; 0% | 05/07/2002 |
| 6364973 | Deep-drawn parts made of spring sheet steel which are especially used as a lightweight structural member or vehicle body part, and a method for the production thereof The invention relates to drawn pieces made of steel plate, particularly for motor vehicles bodies, and to a process for manufacturing such drawn pieces. In order to be able to manufacture drawn pieces with a high piece strength but of a low weight and wit... | 04/02/2002 |
| 6364967 | High-strength, high-toughness rolled shape steel and method of producing the same A 590 MPa-class rolled steel shape of high strength and excellent toughness for use as a building structural member and a method of producing the high-tensile rolled steel shape are provided. Strength optimization by an alloy that elevates hardenability, ... | 04/02/2002 |
| 6355364 | Process of heat treating and annealing CIC and CIC created thereby Processes for preparing copper-INVAR-copper (CIC) for use in making chip packaging and the CIC created. One process comprises annealing a CIC section at a temperature in a range of 1475° F. to 1625° F. for a time in a range of 40 to 120 seconds. Another... | 03/12/2002 |
| 6336980 | Method for in-line heat treatment of hot rolled stock Apparatus for the rolling and heat treatment of elongated metal product of relatively small cross section, such as rods and bars, is described in which the elements required for the conduct of a variety of heat treatments are arranged in in-line dispositi... | 01/08/2002 |
| 6306230 | Process for the production of hardened parts of steel A method for producing hardened parts of steel from an air-hardening steel comprising the steps of heating the steel is heated to a temperature above 1,100° C., hot-working the steel parts until they reach the A1 emperature, cooling the steel ... | 10/23/2001 |
| 6290787 | Process for manufacturing drawable sheet by direct casting of thin strip, and sheet thus obtained The subject for the invention is a process for manufacturing strip. The process includes casting directly from liquid metal a steel strip 1.5 to 10 mm in thickness, subjecting the cast steel strip, in the austenitic phase, to a first hot rolling operation... | 09/18/2001 |
| 6270594 | Composition and method for producing an alloy steel and a product therefrom for structural applications A method of making a high strength low-alloy steel includes the steps of casting an alloy steel into a cast form, hot rolling the cast form into a partially rolled form, and control rolling the partially rolled form to a rolled product. The controlled rol... | 08/07/2001 |
| 6248191 | Method for producing ultra-high strength, weldable steels with superior toughness A method is provided for producing an ultra-high strength steel having a tensile strength of at least about 900 MPa (130 ksi), a toughness as measured by Charpy V-notch impact test at -40° C. (-40° F.) of at least about 120 joules (90 ft-lbs), and a mic... | 06/19/2001 |
| 6224824 | Method of using alloy steel having superior corrosion resistance in corrosive environment containing molten salts containing alkali oxides Disclosed is an alloy steel of high corrosion resistance to hot molten salts containing chlorides and/or alkali oxides. The alloy steel is manufactured from a composition comprising 20-40 weight % of Ni, 0-8 weight % of Cr, 0.05 weight % or less of C, 0.5... | 05/01/2001 |
| 6217680 | Thick cold rolled steel sheet excellent in deep drawability and method of manufacturing the same A steel slab having a composition that comprises at most 0.008% by weight of C, at most 0.5% by weight of Si, at most 1.0% by weight of Mn, at most 0.15% by weight of P, at most 0.02% by weight of S, from 0.01 to 0.10% by weight of Al, at most 0.008% by w... | 04/17/2001 |
| 6171416 | Method of producing can steel strip At least both ends of a sheet bar in the length direction, which is obtained by roughly rolling a steel slab including 0.1 wt % or less of C, 0.5 wt % or less of Si, 1.0 wt % or less of Mn, 0.1 wt % or less of P, 0.05 wt % or less of S, 0.20 wt % or less ... | 01/09/2001 |
| 6108894 | Method of making striker for automotive door latch apparatus A striker for use in a door latch apparatus comprises a base made of a normal-strength steel plate having a strength of 30 to 40 kg/mm2 and a U-shaped member made of a high-strength steel rod having a strength equal to or higher than 70 kg/mm | 08/29/2000 |
| 6099669 | Method for producing a Fe-Ni alloy sheet and a Fe-Ni alloy shadow mask Composition segregation which results in streaks in an Fe--Ni alloy sheet shadow-mask is prevented by the following conditions. Heat-treatment from 1150° C. to a temperature lower than the melting point for longer than 1 hour and not longer than 30 hours... | 08/08/2000 |
