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WO/2008/081517A1 |
This invention provides a method for manufacturing a tool steel, comprising a hot working step of heating a tool steel material containing C: 0.10 to 2.0% to 1050 to 1250ºC for hot working of the tool steel material, a cooling step of, ...
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WO/2008/072664A1 |
A base material is produced by quenching a steel material, which contains not less than 0.3 wt% but not more than 2.7 wt% of carbon and not more than 13 wt% of chromium, while being added with at least one of not less than 0.5 wt% but no...
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WO/2008/072665A1 |
A base composed of a martensitic structure is produced by quenching a steel base material, and a surface coating layer composed of an amorphous Ni-P alloy is formed on the surface of the base. Then the base is subjected to a heat treatme...
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WO/2008/059540A1 |
A method of constructing parts of leather-splitting machines comprises a step of preparing a piece of a splitting machine and a step in which said piece is submitted to heat-treatment; the heat-treatment includes a sub-step of submitting...
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WO/2008/056552A1 |
This invention provides a process for producing a high-concentration carburized steel which can realize dispersion of a large amount of fine and spherical carbides without causing lowered service life of a furnace, deformed steel product...
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WO/2008/050563A2 |
A frictionally press-bonded member includes a steel pipe, and a stab. The steel pipe has opposite ends. The stab is frictionally press-bonded to at least one of the opposite ends of the steel pipe. The steel pipe is subjected to a normal...
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WO/2008/047806A1 |
Disclosed is a cold work die steel which comprises (by mass): C: 0.20-0.60%, Si: 0.5-2.00%, Mn: 0.1-2%, Cr: 3.00-9.00%, Al: 0.3-2.0%, Cu: 1.00-5%, Ni: 1.00-5%, Mo: 0.5-3% and/or W: 2% or less (including 0%), and S: 0.10% or less (excludi...
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WO/2008/031457A1 |
The invention relates to a method for the production of steels. A heat treatment is carried out, which is characterized in that the steel is hardened in water twice at different high temperatures, and subsequently subjected to an anneali...
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WO/2008/032816A1 |
Disclosed is a hot-working tool steel having improved stiffness and high-temperature strength. Also disclosed is a method for producing the hot-working tool steel. The hot-working tool steel comprises the following components (by mass): ...
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WO/2008/020601A1 |
Disclosed is a coil spring for fuel cells which is used in a fuel cell or a cartridge for fuel cells. This coil spring for fuel cells is composed of an austenitic stainless steel without having a nickel plating layer on the surface. The ...
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WO/2008/020602A1 |
Disclosed is a stainless steel member for fuel cells which is used in a fuel cell or a cartridge for fuel cells. This stainless steel member for fuel cells has a magnetic permeability of 1,000-2,500, while having a value of chromium atom...
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WO/2008/016158A1 |
A free-cutting stainless steel that not only ensures excellent cutting and environmental performances but also is simultaneously satisfactory in corrosion resistance and mechanical properties; and a process for producing the same. There ...
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WO/2008/006346A2 |
The invention relates to a method for production of a sheet metal semi-finished product suitable for press hardening, with an improved ratio of strength to ductility, a sheet metal semi-finished product produced by said method and a comp...
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WO/2007/142075A1 |
A process for producing a magnetic powder which is sufficiently reduced in core losses such as iron loss and hysteresis loss and has sufficient strength; and a process for producing a dust core. The process for magnetic powder production...
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WO/2007/132436A2 |
The present invention relates to a process for the production of Carbon steel strips with a mainly fine grained ferrite microstructure, comprising the following steps : • transferring a strip, optionally coiled in the form of a coil, h...
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WO/2007/123164A1 |
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 mat...
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WO/2007/119551A1 |
Disclosed is a method for producing a rare earth permanent magnet material which is characterized in that a sintered magnet body and a mixed powder are subjected to a heat treatment in vacuum or in an inert gas at a temperature not highe...
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WO/2007/119721A1 |
A method of the pretreatment for quenching of a martensitic tool steel. The method prevents a metal structure from suffering particle inclusion through quenching and can further improve toughness. Also provided is a method of quenching. ...
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WO/2007/119553A1 |
A process for producing a rare-earth permanent magnet material which comprises: repeatedly subjecting a sintered magnetic object having the composition R1 aTbAcMd (wherein R1 is any of the rare earth elements including Sc and Y; T is Fe ...
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WO/2007/119271A1 |
This invention provides a thin-film rare earth magnet that has significantly increased magnetic coercive force while suppressing a lowering in residual magnetization of the thin-film magnet. This magnet is a 1 μm to 300 μm-thick thin-f...
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WO/2007/114077A1 |
A process for producing a seamless two-phase stainless-steel pipe in which a two-phase stainless-steel billet is inhibited from generating an oxide scale on the surface thereof during heating and the generation of outer-surface defect is...
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WO/2007/102280A1 |
A method of metal surface hardening treatment inducing transformation, in which transformation is induced in a surface interior of material as hardening treatment object by simple, rapid treatment utilizing a frictional heat under pressu...
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WO/2007/087785A1 |
Disclosed is a creep-resistant low-expansion iron-nickel alloy that is provided with increased mechanical resistance and contains 40 to 43 wt. % of Ni, a maximum of 0.1 wt. % of C, 2.0 to 3.5 wt. % of Ti, 0.1 to 1.5 wt. % of Al, 0.1 to 1...
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WO/2007/085720A1 |
The invention concerns a method for making a unitary spark ignition valve, characterized in that it consists in preparing and casting a steel made up in wt.% of: 0.45 % ≤ C 0.55 % ; 12 % ≤ Cr ≤ 18 % ; 1 % ≤ Si ≤ 2.5 % ; traces ...
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WO/2007/079876A1 |
Compared to conventional steel products, polyphase steels have a significantly improved combination of resistance and ductility and are therefore becoming more and more important - especially for the automobile industry. The currently mo...
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WO/2007/076748A1 |
The invention relates to a deformable lightweight structural steel, which exhibits a resistance to hydrogen embrittlement, has TRIP- and TWIP properties and contains the following elements (in wt.-%): C 0.05 to <= 1.0; Al 0.0 to <= 11.0;...
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WO/2007/077651A1 |
A nanocrystalline soft magnetic alloy that even when produced from a broad amorphous alloy thin-band, excels in alternating-current magnetic properties, realizing low fluctuation and excellent aging stability at high temperature, and tha...
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WO/2007/074157A2 |
The invention relates to a method for producing a cold-rolled strip with a ferritic structure. According to said method, molten steel that forms a ferritic structure on cooling is cast into a strip, if necessary the cast strip is hot-rol...
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WO/2007/038789A1 |
A method for heat treating thick-walled forgings including heating a low alloy steel to an austenitizing temperature, wherein the low alloy steel comprises carbon of about 0.05- 0.2 wt.%, manganese of about 0.3-0.8 wt.%, and nickel of ab...
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WO/2007/033635A1 |
A method is disclosed for manufacturing cold-formed, in particular cold-drawn, precision steel pipes for use, in particular, as cylinder pipes under pressure, with optimum admixture of one or more alloying elements, as well as impurities...
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WO/2007/033711A1 |
The present invention relates to a method for treating a steel strip, particularly a steel strip made of highly resistant heat-treated steel, by cold rolling. The inventive method comprises at least a first step of heat treatment consist...
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WO/2007/032531A1 |
Disclosed is a magnetic alloy having a chemical composition represented by the following general formula: Fe100-x-yCuxBy (atom%) (wherein x and y represent numbers respectively satisfying 0.1 ≤ x ≤ 3 and 10 ≤ y ≤ 20) or the follo...
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WO/2007/013485A1 |
A method of heat treatment for high-strength steel pipe that not only ensures secondary workability but also realizes a satisfactory pressure resisting performance capable of coping with recent-year high pressurization of common rail fue...
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WO2006128050B1 |
Razor blades for use in wet shave razors are produced from a precipitation hardenable ferrous composition having an austenitic structure and being supersaturated in certain elements, by a cold rolling process which converts most of the a...
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WO/2007/003748A1 |
The invention concerns martensitic stainless steel, characterized in that its composition in weight percentages is as follows: 9 % = Cr = 13 %; 1.5 % = Mo = 3 %; 8 % = Ni = 14 %; 1 % = Al = 2 %; 0.5 % = Ti = 1.5 % with AI + Ti = 2.25 %; ...
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WO/2006/136079A1 |
The present invention concerns an austenite-film-toughened martensite wear-resisting cast steel and its manufacture process. The steel comprises 0.25-0.34wt%C, 1.40-2.05wt%Si, 0.90-1.20wt%Mn, 1.80-2.50wt%Cr, 0.0005-0.005wt%B, 0.01-0.06wt...
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WO/2006/134541A1 |
The invention relates to a method for making a thin finished product to be formed by deformation that combines strength with resistance to a highly corrosive environment. The method comprises forming a sheet of stainless steel with a mic...
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WO/2006/114499A2 |
The invention relates to steel which is characterised by the following composition as expressed in percentages by weight: - C = 0.18 0.30 %, - Co = 5 -7 %, - Cr = 2 - 5 %, - Al = 1 - 2 %, - Mo + W/2 = 1 - 4 %, - V = trace 0.3 %, - Nb = t...
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WO/2006/112213A1 |
This invention provides a movement guide apparatus comprising a trajectory member and a moving member provided in the trajectory member through a plurality of rolling elements reciprocatably or rotatably in the axial line direction or ci...
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WO/2006/112214A1 |
A stabilized austenitic stainless steel for use in a component member of a motion guide device is produced through a forming and working process (steps S10 to S18) of subjecting a raw material to machining, to form it into a prescribed s...
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WO/2006/106650A1 |
The delayed fracture occurring after the hot working of a martensitic stainless steel is prevented by, after the hot working and prior to an heat treatment in which a quenching from a temperature equal to or higher than an Ac1 temperatur...
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WO/2006/101117A1 |
An iron-based rare-earth-containing nanocomposite magnet which is an iron-based rare-earth-containing nanocomposite magnet containing an Nd2Fe14B phase and an &agr -Fe phase and having a composition represented by the empirical formula T...
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WO/2006/082104A1 |
Substantially austenitic steel having high strength and good formability for cold rolling comprising (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 impuri...
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WO/2006/071437A2 |
A carbon steel alloy that exhibits the combined properties of high strength, ductility, and corrosion resistance is one whose microstructure contains ferrite regions combined with martensite-austenite regions, with carbide precipitates d...
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WO/2006/068258A1 |
A ferritic stainless steel pipe, which is producing by subjecting a raw material plate, which has a chemical composition, in mass %, that C: 0.001 to 0.015 %, N: 0.001 to 0.020 %, Cr: 11 to 25 %, Mo: 0.01 to 2.0 %, one or more of Ti and ...
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WO/2006/064553A1 |
A steel which has a chemical composition, in wt %, C: 0.005 to 0.05 %, Si: 0.1 to 0.5 %, Mn: 0.1 to 2.0 %, P: 0.05 % or less, S: 0.005 % or less, Cr: 10.0 to 12.5 %, Mo: 0.1 to 0.5 %, Ni: 1.5 to 3.0 %, N: 0.02 % or less, Al: 0.01 to 0.1 ...
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WO/2006/054430A1 |
A martensitic stainless steel which has a chemical composition, in mass %, that C: 0.001 to 0.01 %, Si: 0.5 % or less, Mn: 0.1 to 3.0 %, P: 0.04 % or less, S: 0.01 % or less, Cr: 10 to 15 %, Ni: 4 to 8 %, Mo: 2.8 to 5.0 %, Al: 0.001 to 0...
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WO/2006/054368A1 |
This invention provides a technique for rendering bio-toxicity such as allergy toxicity derived from Ni trace impurity, i.e., nickel toxicity, which is unavoidably present in a bio-Co-Cr-Mo alloy or an Ni-free stainless steel alloy unhar...
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WO/2006/050696A1 |
The invention relates to a method for thermally treating a component consisting of a fully hardenable, heat-resistant steel, said thermal treatment comprising the full hardening, case hardening and annealing of said component, in additio...
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WO/2006/048034A1 |
The inventive method for producing cold-formable high-strength steel strips or sheets exhibiting TWIP properties consists of successive working steps carried out without interruption, wherein a molten material has the following compositi...
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