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| Number | Title | Issue Date |
| 7754032 | Method for manufacturing a high speed tool steel A high speed tool steel, which is high in impact value and free from variations in tool performance, comprising, by mass %, of: 0.4≦C≧0.9; Si≦1.0; Mn≦1.0; 4≦Cr≧6; 1.6-6 in total of either or both of W and Mo in the form of (½W+Mo) wherein W≦3; 0.5-3 i... | 07/13/2010 |
| 7648597 | 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/mm2) or larger tensile strength and having also extremely superior balance of strength and toughness both before PWHT and after PWHT to that of t... | 01/19/2010 |
| 7425240 | Method for the production of a siderurgical product made of carbon steel with a high copper content The invention relates to a method for producing a siderurgical product made of carbon steel having a high copper content, according to which: —a liquid steel having the composition: 0.0005%≦1%; 0.5≦Cu≦10%; 0≦Mn≦2%; 0≦Si≦5% 0≦Ti≦0.5%; 0≦Nb≦0.5... | 09/16/2008 |
| 7396423 | Method for manufacturing steel plate having superior toughness in weld heat-affected zone A welding structural steel product exhibiting a superior heat affected zone toughness, comprising, in terms of percent by weight, 0.03 to 0.17% C, 0.01 to 0.5% Si, 0.4 to 2.0% Mn, 0.005 to 0.2% Ti, 0.0005 to 0.1% Al, 0.008 to 0.030% N, 0.0003 to 0.01% B, 0.001 to 0.... | 07/08/2008 |
| 7357060 | Vehicle armor A vehicle is armored the steps of sequentially making a steel plate with a thickness of 4 mm to 15 mm of by weight | 04/15/2008 |
| 7323070 | Maraging steel excellent in fatigue characteristics and method for producing the same A process of producing a maraging steel includes melting a steel of a defined composition, casting the molten steel to obtain a steel ingot, hot forging the steel ingot at a forging ratio of at least 4, then soaking the forged piece one or more times to keep the for... | 01/29/2008 |
| 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 |
| 7168880 | Impact attenuator system An impact attenuator system includes a hyperelastic member that comprises an energy absorbing material which behaves in a rate-independent hyperelastic manner so that its permanent set is minimized and the material can absorb tremendous amounts of impact energy whil... | 01/30/2007 |
| 7096075 | Apparatus, method and program for physical state controller For determination as to whether there is a possibility that temperature control satisfying conditions according to an upper limit LH_i and a lower limit LL_i of the annealing control temperatures of annealing object steel sections i will be realized under restrictio... | 08/22/2006 |
| 7037388 | Steel plate for paint use and manufacturing method thereof A steel plate for paint use which contains C (0.12% or less), Si (1.0% or less), Mn (2.5% or less), P (0.05% or less), S (0.02% or less), and Cr (0.05% or less), Cu (0.05–3.0%), Ni (0.05–6.0%), Ti (0.025–0.15%), and Cu+Ni (0.50% or more), with PCM b... | 05/02/2006 |
| 7005017 | Steel for mechanical construction, method of hot-shaping of a part from this steel, and part thus obtained The invention relates to a steel for mechanical construction, wherein its composition in percentages by weight is: 0.35%≦C≦1.2%; 0.10%≦Mn≦2.0%; 0.10%≦Si≦3.0%; traces≦Cr≦4.5%; traces≦Mo≦2.0%; traces≦Ni≦4.5%; traces≦V≦0.5%; traces≦Cu≦3.... | 02/28/2006 |
| 6994758 | Steel for mechanical construction, method of hot-shaping of a part from this steel, and part thus obtained The invention relates to a steel for mechanical construction, wherein its composition in percentages by weight is: 0.35%≦C≦2.5%; 0.10%≦Mn≦2.5%; 0.60%≦Si≦3.0%; traces≦Cr≦4.5%; traces≦Mo≦2.0%; traces≦Ni≦4.5%; traces≦V≦0.5%; traces≦Cu≦4%... | 02/07/2006 |
| 6971351 | Valve timing adjusting device A region including an engaging hole is given surface treatment such as partial quench hardening by induction hardening for improving surface hardness of the region. The partial quench hardening by induction hardening provides the region with satisfactory mechanical ... | 12/06/2005 |
| 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 |
| 6863749 | Method of improving the toughness of low-carbon, high-strength steels A method of post-solidification processing to minimize the content of extremely coarse grain-refining precipitates that may form during solidification is low-alloy and alloy high-strength steels containing approximately 0.09-0.17% by weight C so as to provide improv... | 03/08/2005 |
| 6855213 | Non-ridging ferritic chromium alloyed steel A ferritic non-ridging stainless steel and process therefor. A chromium alloyed steel melt containing sufficient titanium and nitrogen but a controlled amount of aluminum is cast into an ingot or continuously cast into a strip or a slab having an as-cast fine equiax... | 02/15/2005 |
| 6852180 | Method for making carbon steel bands, in particular packaging steel bands, and resulting bands The invention relates to the iron and steel industry. More specifically, the invention describes the manufacture of steel strip intended to be converted into thin packaging, such as for drinks and preserved food. ... | 02/08/2005 |
| 6835253 | Method for producing a hot strip The invention relates to a method for producing a hot strip, in particular for producing a hot strip intended for the production of a cold strip with good deep-drawing characteristics; in which a steel melt comprising (in % by weight) C:≦0.07%, Si:≦0.5%, Mn:≦2... | 12/28/2004 |
| 6818079 | Method for manufacturing a steel sheet A method for manufacturing a steel sheet comprising continuously casting a steel containing 0.04 to 0.2 wt. % C, 0.25 to 2 wt. % Si, 0.5 to 2.5 wt. % Mn, and 0.1 wt. % or less Al to form a slab; hot-rolling by rough-rolling the slab to form a sheet bar and finish-ro... | 11/16/2004 |
| 6793744 | Martenstic stainless steel having high mechanical strength and corrosion The present invention relates to a martensitic stainless steel that can be used in manufacturing articles such as a shaft or an impeller which require high mechanical strength and corrosion resistance and provides a martensitic stainless steel comprising less than 0... | 09/21/2004 |
| 6793745 | Maraging type spring steel The invention relates to a high-strength, age-hardenable, corrosion-resistant maraging type spring steel, which is essentially comprised of 6.0 to 9.0 wt. % of Ni, 11.0 to 15.0 wt. % of Cr, 0.1 to 0.3 wt. % of Ti, 0.2 to 0.3 wt. % of Be and of a remainder consisting... | 09/21/2004 |
| 6689229 | High strength cold rolled steel sheet and method for manufacturing the same A high strength cold rolled steel sheet consists essentially of 0.0040 to 0.01% C, not more than 0.05% Si, 0.1 to 1.0% Mn, 0.01 to 0.05% P, not more than 0.02% S, 0.01 to 0.1% sol.Al, not more than 0.004% N, 0.01 to 0.14% Nb, by weight, and a balance of s... | 02/10/2004 |
| 6669789 | Method for producing titanium-bearing microalloyed high-strength low-alloy steel A composition and method of making a high-strength low-alloy hot-rolled steel sheet, strip, or plate bearing titanium as the principal or only microalloy strengthening element. The steel is substantially ferritic and has a microstructure that is at least ... | 12/30/2003 |
| 6663725 | High strength steel sheet and method for manufacturing the same The present invention relates to a high strength steel sheet consisting essentially of 0.04 to 0.1% C, 0.5% or less Si, 0.5 to 2% Mn, 0.05% or less P, 0.005% or less 0, 0.005% or less S, by weight, having 10 μm or less of average ferritic grain size, and... | 12/16/2003 |
| 6663730 | Maraging steel and process for manufacturing a strip or a part cut out of a strip of cold-rolled maraging steel A maraging steel strip or part and process for manufacture of a strip or of a part cut out of a strip of cold-rolled maraging steel and hardened by a hardening heat treatment. In the process, before the hardening heat treatment is performed, the strip or ... | 12/16/2003 |
| 6652670 | Steel sheet and method for manufacturing the same The method for manufacturing steel sheet comprises the steps of: rough-rolling to form a sheet bar; finish-rolling the sheet bar to form a steel strip; applying primary cooling and secondary cooling to the finish-rolled steel strip; and coiling the second... | 11/25/2003 |
| 6648991 | LOW-ALLOY CARBON STEEL FOR THE MANUFACTURE OF PIPES FOR EXPLORATION AND THE PRODUCTION OF OIL AND/OR GAS HAVING AN IMPROVED CORROSION RESISTANCE, A PROCESS FOR THE MANUFACTURE OF SEAMLESS PIPES, AND THE SEAMLESS PIPES OBTAINED THEREFROM Low-alloy carbon steel for the manufacture of seamless pipes having improved resistance to corrosion, particularly the "sweet corrosion" that occurs in the media rich in CO2, for using in exploration and production of oil and/or natural gas. Th... | 11/18/2003 |
| 6641681 | Steel material and its manufacture The invention concerns a steel material which consists of a steel having the following chemical composition in weigh-%: 1.0-1.9 C, 0.5-2.0 Si, 0.1-1.5 Mn, 4.0-5.5 Cr, 2.5-4.0 (Mo+W/2), however max 1.0 W, 2.0-4.5 (V+Nb/2), however max 1.0. Nb, balance iron... | 11/04/2003 |
| 6623573 | Steel sheet and method for manufacturing the same The method for manufacturing steel sheet comprises the steps of: forming a sheet bar; forming a steel strip; primary-cooling; air-cooling; secondary-cooling; and coiling. The sheet bar is finish-rolled at finish temperatures of (Ar3 transformat... | 09/23/2003 |
| 6579385 | Free machining steel for use in machine structure of excellent mechanical characteristics Free machining steel for use in machine structures capable of stably and reliably providing excellent machinability (chip disposability and tool life) and mechanical characteristics (transverse direction toughness) comparable, in a Pb free state, with exi... | 06/17/2003 |
| 6557622 | Differential quench method and apparatus Surface defects in rolled steel are remedied by quenching a surface layer of the steel product downstream of the caster and upstream of the reheat furnace by transversely differentiated quenching to match the transverse temperature profile of the steel pr... | 05/06/2003 |
| 6558486 | Method of producing cold rolled steel strip Method of producing strip comprising continuously casting plain carbon steel into a strip of no more than 5 mm thickness and coiling the strip. The strip is subsequently uncoiled and cold rolled then annealed to produce a stress relieved microstructure th... | 05/06/2003 |
| 6524408 | Method for producing load-optimized steel strips To produce sheet steel components optimised for loading, a steel strip is cast between two cooled rolls with a variable nip and the thickness of the steel strip is changed by changing the time of contact between the strand shells and the rolls or by chang... | 02/25/2003 |
| 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 |
| 6494969 | High strength cold rolled steel sheet and method for manufacturing the same The present invention relates to a very low C--Nb cold rolled steel sheet giving 340 to 440 MPa of tensile strength. For example, the cold rolled steel sheet consists essentially of 0.0040 to 0.01% C, not more than 0.05% Si, 0.1 to 1.0% Mn, 0.01 to 0.05% ... | 12/17/2002 |
| 6475307 | Method for fabricating vehicle components and new use of a precipitation hardenable martensitic stainless steel A composition and method for the manufacture of products of a precipitation hardenable martensitic stainless steel, the composition of which comprises at least 0.5% by weight of Cr and at least 0.5% by weight of Mo wherein the sum of Cr, Ni and Fe exceeds... | 11/05/2002 |
| 6383316 | Cold drawn wire and method for the manufacturing of such wire Through electro slag refining of a bloom of a stainless, precipitation hardenable stainless steel of 17-7 PH type, the fatigue resistance of springs made of cold drawn wires of said material is increased substantially. This depends on the fact that large ... | 05/07/2002 |
| 6372063 | Process for manufacturing metallic component and such metallic component The process for manufacturing a metallic component, such as a wheel part for the rolling system of a vehicle, which includes, in an initial stage, forming the component of a metallic material in a semi-solid state and having a thixotropic structure, and i... | 04/16/2002 |
| 6358338 | Process for manufacturing strip made of an iron-carbon-manganese alloy, and strip thus produced The invention relates to a process for producing strip made of an iron-carbon-manganese alloy, in which: a thin strip, having a thickness of 1.5 to 10 mm, is cast directly on a casting machine from a liquid metal of composition, in percentages by weight: ... | 03/19/2002 |
| 6319338 | High-strength steel plate having high dynamic deformation resistance and method of manufacturing the same The object of the present invention is to provide high-strength steel sheets exhibiting high impact energy absorption properties, as steel materials, to be used for shaping and working into such parts as front side members of automobiles which absorb impa... | 11/20/2001 |
