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| Number | Title | Issue Date |
| 7354487 | Cooled and annealed bainite steel part, and a method of manufacturing it The invention provides a method of fabricating a steel part, the method comprising the steps of: preparing and casting a steel having the following composition in percentage by weight: 0.06%≦C≦0.25%; 0.5%≦Mn≦2%; traces≦Si... | 04/08/2008 |
| 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 |
| 6974511 | Steel sheet with low aluminum content for containers The present invention provides a process for manufacturing a steel strip with low aluminum content, which includes: hot-rolling a steel strip including between 0.050 and 0.080% by weight of carbon, between 0.25 and 0.40% by weight ... | 12/13/2005 |
| 6939419 | Method for producing axially symmetric parts and the article The invention relates to plastic metal working, more specifically to methods for producing parts of the disk- or shell-type having conical, hemispherical, and also combined parts, such as disk-and-shaft ones. The invention is instrumental in producing large axially ... | 09/06/2005 |
| 6682613 | Process for making high strength micro-alloy steel A process for enhancing precipitation strengthening in steel and for making a high-strength micro-alloy steel, and a steel made from the process. The process includes the step of deforming the steel containing a suitable precipitate strengthening substanc... | 01/27/2004 |
| 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 |
| 6641682 | Method for manufacturing an aperture grill material for color picture tube An aperture grill material for a color picture tube having excellent tensile strength and high-temperature creep characteristics and magnetic characteristics superior to existing materials, a production method therefor, an aperture grill and a color pictu... | 11/04/2003 |
| 6565683 | Method for processing billets from multiphase alloys and the article The invention relates to plastic working of metals and alloys, predominantly low-plastic and hard-to-work ones, e.g., nickel-, titanium-, and iron-base high-temperature alloys, and producing billets for parts made by plastic working of said billets. The m... | 05/20/2003 |
| 6478898 | Method of producing tool steels A method of producing a tool steel comprises quenching a steel containing, by mass percent, C: 0.25 to 0.60%, Si: 0.10 to 1.20%, Mn: 0.20 to 1.50%, Ni: 0.50 to 2.00%, Cr: 1.00 to 4.20%, Mo: 0.30 to 2.00%, V: 0.10 to 1.00% and Al: 0.005 to 0.10%, in order ... | 11/12/2002 |
| 6420054 | Masking device for a color cathode-ray display tube with a flat screen, of the type comprising a support frame for a tensioned shadowmask, and tensioned shadowmask Masking device for a color cathode-ray display tube with a flat scree, of the type comprising a support frame for a tensioned shadowmask and a tensioned shadowmask mounted on the support frame so as to undergo tensioning at room temperature, in which devi... | 07/16/2002 |
| 6358335 | Continuous casting slab suitable for the production of non-tempered high tensile steel material N--V(nitrogen-vanadium) containing continuous casting slab with no surface cracks suitable for the manufacture of non-tempered high tensile steel materials has a tensile strength of 490 MPa or more and excellent toughness. A method of manufacturing non-te... | 03/19/2002 |
| 6143100 | Bake-hardenable cold rolled steel sheet and method of producing same A bake hardenable cold-rolled steel sheet and a method for producing the steel sheet are provided, wherein the steel sheet includes carbon in a range of about 0.003-0.1 wt. %, with the amount of carbon in solution being about 3-30 ppm, and the steel is su... | 11/07/2000 |
| 6129795 | Metallurgical method for processing nickel- and iron-based superalloys A method is provided for improving the microstructure of nickel and iron-based precipitation strengthened superalloys used in high temperature applications by increasing the frequency of "special", low-Σ CSL grain boundaries to levels in excess of 50%. P... | 10/10/2000 |
| 6027581 | Cold rolled steel sheet and method of making Cold rolled steel sheet with excellent deep drawability and excellent anti-aging properties, and manufacturing method. The cold rolled steel sheet comprises about C: above 0.015 to 0.150 wt %, Si: 1.0 wt % or less, Mn: 0.01 to 1.50 wt %, P: 0.10 wt % or l... | 02/22/2000 |
| 5900076 | Bainitic steel materials having a less scattering of properties and method of producing the same This invention provides bainite steel materials having a less scattering of properties in a thickness direction or between steel materials by using a chemical composition of C: not less than 0.001 wt % but less than 0.030 wt %, Si: not more than 0.60 wt %... | 05/04/1999 |
| 5895534 | Method of increasing the yield strength of cold formed steel sections Yield strength of a cold rolled steel section is increased and controlled by performing a predetermined amount of strain by way of cold working in an in-line roll forming process followed by a controlled amount of strain aging wherein the temperature of t... | 04/20/1999 |
| 5769974 | Process for improving magnetic performance in a free-machining ferritic stainless steel A method for making a corrosion resistant, ferritic steel alloy, with reduced magnetic coercivity is disclosed. The process includes the step of providing an intermediate form of a ferritic alloy consisting essentially of, in weight percent, about ... | 06/23/1998 |
| 5766381 | Method of producing bainitic steel materials having a less scattering of properties This invention provides bainite steel materials having a less scattering of properties in a thickness direction or between steel materials by using a chemical composition of C: not less than 0.001 wt % but less than 0.030 wt %, Si: not more than 0.60 wt %... | 06/16/1998 |
| 5637161 | Method of producing an alloy sheet for a shadow mask A method for manufacturing an alloy sheet for a shadow mask is provided which includes: (i) annealing a hot-rolled sheet containing Fe and Ni at a temperature of 910° to 990° C.; (ii) cold-rolling the annealed hot-rolled sheet from step (i) to produce a... | 06/10/1997 |
| 5522953 | Method of manufacturing an alloy sheet A method for manufacturing an alloy sheet comprising the steps of: (a) hot-rolling a slab containing Fe, Ni and Cr into a hot-rolled strip; (b) annealing the hot-rolled strip at a temperature of 810° to 890° C.; (c) cold-rolling the annealed hot-rolled ... | 06/04/1996 |
| 5520755 | Method for manufacturing thin Fe--Ni alloy sheet for shadow mask A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy shee... | 05/28/1996 |
| 5503693 | Method for producing a thin Fe-Ni alloy for shadow mask A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy shee... | 04/02/1996 |
| 5501749 | Method for producing a thin Fe-Ni alloy for shadow mask thereof A thin Fe--Ni alloy sheet for shadow mask consists essentially of Ni of 34 to 38 wt. %, Si of 0.05 wt. % or less, B of 0.0005 wt. % or less, O of 0.002 wt. % or less and N of 0.0015% or less, the balance being Fe and inevitable impurities; said alloy shee... | 03/26/1996 |
| 5405463 | Continuous annealing process of producing cold rolled mild steel sheet excellent in deep drawability and aging resistibility Deep drawability and aging resistibility as required are imparted to cold rolled steel sheet by controlling the amount of C, starting temperatures of rapid cooling and cooling rate in a proposed continuous annealing process.... | 04/11/1995 |
| 5374323 | Nickel base alloy forged parts Disclosed is a large alloy forging, the forging having an alloy composition selected from one of a nickel base alloy, a cobalt-chromium-nickel base alloy, a nickel-cobalt base alloy and an iron-nickel-chromium-molybdenum alloy, the forging having a grain ... | 12/20/1994 |
| 5360496 | Nickel base alloy forged parts Disclosed is a large alloy forging and method for making it. The forging having an alloy composition selected from one of a nickel base alloy, a cobalt-chromium-nickel base alloy, a nickel-cobalt base alloy and an iron-nickel-chromium-molybdenum alloy and... | 11/01/1994 |
| 5342457 | Method for the production of a switch diamond In a method for the production of a switch diamond for switch rails and double crossovers with a switch diamond point out of carbon steel and connector rails, the switch diamond point is rolled and submitted to heat treatment, by which the switch diamond ... | 08/30/1994 |
| 5294271 | Heat treatment for manufacturing spring steel excellent in high-temperature relaxation resistance The high-temperature relaxation resistance of spring steel is improved by providing a specified composition of the steel, and subjecting that steel composition to a controlled heat treatment. The high-temperature relaxation resistance, which can not be es... | 03/15/1994 |
| 5290374 | Method of making a pin type bearing retainer A pin type retainer for roller bearings is stamped in one piece from flat metal stock. The flat metal is first drawn into a cup shape having a broad flange around an open first end and a closed second end. The closed end provides solid support and alignme... | 03/01/1994 |
| 5246511 | High-strength lead frame material and method of producing same A high-strength lead frame material consists, by weight, of 0.5 to 22% Co, 22 to 32.5% Ni, not more than 1.0% Mn, not more than 0.5% Si, at least one kind of 0.1 to 3.0% in total selected from the group consisting of Nb, Ti, Zr, Mo, V, W and Be, and the b... | 09/21/1993 |
| 5238511 | Double C-shaped clamp A double C-shaped, resilient, biased clamp for fixing a track rail to a support is manufactured by bending a piece of bar material to a double C-shape. Thereafter the clamp is hardened and heat treated. Prior to bending heating takes place at approximatel... | 08/24/1993 |
| 5223053 | Warm work processing for iron base alloy A process for strengthening heavy, thick-section forgings of precipitation age hardenable iron base superalloys. The process includes initial recrystallization to achieve a uniform grain size, intermediate temperature warm working at controlled strain rat... | 06/29/1993 |
| 5139582 | Method of manufacturing an oriented silicon steel sheet having improved magnetic characeristics A method of manufacturing an oriented silicon steel sheet improved in magnetic characteristics, in which a hot-rolled steel sheet of oriented silicon steel containing about 0.01 to 0.10% by weight of Al and about 0.01 to 0.04% by weight of Sb as inhibitor... | 08/18/1992 |
| 5122199 | Copper brazed torque converter pump housing made from formable high strength microalloyed steel A method is provided for thermally treating a high strength, microalloyed steel so as to first induce sufficient ductility (and corresponding low strength) in the microalloyed steel to readily enable the room temperature forming and/or machining of the st... | 06/16/1992 |
| 5098489 | Process for manufacturing high-strength parts of an automobile transmission system Steel containing, on a weight percent basis, 0.01 to 0.15% of carbon, 0.05 to 0.50% of silicon, 0.20 to 1.0% of manganese, 0.01 to 0.1% of aluminum, 0.3 to 2.0% of copper, 0.1 to 2.0% of nickel, 0.015 to 0.1% of niobium and 0.0005 to 0.0050% of calcium, t... | 03/24/1992 |
| 5061325 | Method of producing high tension steel superior in weldability and low-temperature toughness A method of high tension steel having superior weldability and low temperature toughness, comprises the steps of preparing a steel billet having a composition consisting, by weight, of 0.02 to 0.05% C, 0.02 to 0.5% Si, 0.4 to 1.5% Mn, 0.5 to 4.0% Ni, 0.20... | 10/29/1991 |
| 4851054 | Method of producing rolled steel having excellent resistance to sulfide stress corrosion cracking Disclosed herein is a rolled steel having excellent resistance to sulfide stress corrosion cracking. It comprises 0.20-0.40 wt. % C, ࣘ0.50 wt. % Si, ࣘ1.90 wt. % Mn, ࣘ0.06 wt. % Al, 0.0030-0.0090 wt. % N, 0.005-0.10 wt. % Nb, 0.005-0.050 wt. % Ti, an... | 07/25/1989 |
| 4824492 | Method for producing a precipitation hardenable martensitic low alloy steel forging A precipitation-hardenable martensitic low alloy steel for use in producing forgings having an improved combination of strength and toughness. The steel may be quenched directly from forging temperature. The composition of the steel consists essentially o... | 04/25/1989 |
| 4775429 | Large diameter high strength rolled steel bar and a process for the production of the same A large diameter high strength hot rolled steel bar consisting of a low alloy steel having a carbon content of 0.3 to 0.9% and a metallurgical structure with a interlammelar spacing of 0.05 to 0.15 μm, and having a diameter of at least 20 mm, a tensile s... | 10/04/1988 |
| 4741080 | Process for providing valve members having varied microstructure A process for providing an engine valve (2) with varied microstructure grain size is provided. The process includes the steps of: providing a slug (4) of suitable metallic valve composition having a grain size of less than about A.S.T.M. 8; solution heat ... | 05/03/1988 |
