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| Number | Title | Issue Date |
| 7503985 | Quenching method Provided is a quenching method capable of producing quenched articles having little distortion and having a desired hardness. The quenching method with a coolant is specifically so controlled that the surface of the quenching bath is kept under pressure all the time... | 03/17/2009 |
| 7418782 | Method of manufacturing a gas storage tank The technique of the invention manufactures a gas storage tank, which includes a gas absorbent/adsorbent and is capable of storing a high-pressure gas. The manufacturing process of a hydrogen storage tank first assembles a heat exchanger unit and packs the particles... | 09/02/2008 |
| 7347927 | Oil composition for heat treatment A heat treatment oil composition comprising a mixed base oil containing 50-95 weight % of (A) a low viscosity base oil with kinematic viscosity of 5-60 mm2/s at 40° C., and 50-5 weight % of (B) a high viscosity base oil with kinematic viscosity of more t... | 03/25/2008 |
| 7294215 | Method and device for cooling steel sheet The present invention relates to a method for cooling a steel plate comprising the steps of: forming a water pool with jets of cooling water being injected to impinge on one another by using one slit-nozzle and a plurality of induced laminar flow nozzles, the slit n... | 11/13/2007 |
| 7226493 | Method for grain refining of steel, grain refining alloy for steel and method for producing grain refining alloy The present invention relates to a method for grain refining of steel. A grain refining alloy having a composition FeXY where X is one or more elements selected from the group consisting of Cr, Mn, Si, Ni, and Mo and where Y is one or more oxide and/or sulphide and ... | 06/05/2007 |
| 7138020 | Method for reducing heat treatment residual stresses in super-solvus solutioned nickel-base superalloy articles In accordance with an embodiment of the present invention, a method for reducing residual stress in a nickel-base superalloy article comprising about 40–70% of gamma prime phase and having a gamma prime solvus temperature is disclosed. The method comprises the ste... | 11/21/2006 |
| 6843867 | Method of austempering steel parts A method of austempering of steel parts is described. The steel parts are initially austenitized and subsequently quenched to a start temperature which is higher than the martensite start temperature. Then the steel parts are subjected to a first isothermal holding ... | 01/18/2005 |
| 6837948 | Process of production of compressor shoe A process of production of a compressor shoe superior in durability and reduced in manufacturing cost, wherein a process of quenching the shoe is performed in a vacuum, inert gas, or modified gas so as to prevent oxidation of the chrome and manganese of the surface ... | 01/04/2005 |
| 6723188 | Steel workpiece oil quenching method A steel workpiece maintained at a specified quenching temperature is rapidly cooled to a temperature just above the martensite transformation start point (Ms point) by being immersed in a high-temperature quenching oil. Thereafter, the steel workpiece is taken out o... | 04/20/2004 |
| 6630038 | Processing apparatus for forming metallic material A processing apparatus forms a metallic material such as steel. The apparatus includes a heating tub, spray nozzles, a cooling tub, and a circulator. The heating tub heats the steel to equal to or higher than the modification point of the steel. The spray... | 10/07/2003 |
| 6364974 | Quenching apparatus and method for hardening steel parts A quenching apparatus and a method for hardening steel parts is disclosed. The method optimizes cooling conditions preventing the occurrence of film boiling and the "self-regulated thermal process" while optimizing the depth of the hardened layer and prov... | 04/02/2002 |
| 6231698 | Surface hardened swage mount for improved performance A swage mount including a base plate having a first side and a second side. A hub extends from the first side of said base plate with the hub having an aperture therethrough. The second side of the base plate is mounted on either the actuator arm or the l... | 05/15/2001 |
| 6099666 | Variable cooling rate quench method and apparatus A variable rate quench system allows the cooling of a heated workpiece to be controlled more closely. A liquid quenchant used in the system has an initial temperature, density and heat extraction index. The system comprises a first tank containing the liq... | 08/08/2000 |
| 6086685 | Profiled rolling stock and method for manufacturing the same A profiled rolling stock, in particular a running rail or railroad track made of an iron-based alloy, is provided. The alloy contains silicon plus aluminum below 0.99 wt. % of the rolling stock. A structure in the cross section is formed, at least partial... | 07/11/2000 |
| 5820705 | Spray quenching of metal with liquid coolant containing dissolved gas A method of quenching a metal object having steps of: (a) providing a liquid coolant having a temperature from about 100° F. to about 180° F. and containing about 0.01 to about 0.1 standard cubic feet of carbon dioxide gas per gallon of water dissolved ... | 10/13/1998 |
| 5759309 | Thermal process for selectively hardening track chain links A process for selectively hardening a forged track chain link has the following steps. A forged track chain link having a pad portion, a rail portion, a first side portion and a second side portion, is provided. A quench tank is provided and adapted for s... | 06/02/1998 |
| 5591277 | Method for thermally conditioning disc drive swage mounts A method for thermally conditioning a disc drive swage mount to enhance torque retention capability and plate stiffness wherein the swage mount is baked in an oxygen depleted environment to an elevated temperature within a predetermined range of temperatu... | 01/07/1997 |
| 5490886 | Methods for quenching metal A method for quenching hot metals especially iron steel or copper with a quenching fluid comprising a major proportion of an organic phosphate ester. The preferred esters are trialkyl phosphates and tri(alkyl phenyl) phosphates. The quenched article may e... | 02/13/1996 |
| 5487796 | Method of quenching metals A method of quenching metals, in particular steel alloys includes treatment of the article being quenched in a boiling aqueous solution of sodium tetraborate, with gas being additionally introduced into the quench bath. The supply of gas enables a continu... | 01/30/1996 |
| 5419792 | Method and apparatus for cooling a workpiece Cooling of a workpiece is conducted at selected workpiece locations in accordance with predetermined heat flux, at the locations, required to result in a desired workpiece cooling rate for workpiece integrity, microstructure and mechanical properties. A c... | 05/30/1995 |
| 5382306 | Spray unit for cooling extruded sections The spray unit lies downstream, in-line with an extrusion press and serves to cool metallic sections in particular sections of aluminum or an aluminum alloy from all sides. The cooling medium emerges from spray nozzles program-controlled in the direction ... | 01/17/1995 |
| 5292384 | Cr-W-V bainitic/ferritic steel with improved strength and toughness and method of making A high strength, high toughness Cr-W-V ferritic steel composition suitable for fast induced-radioactivity (FIRD) decay after irradiation in a fusion reactor comprises 2.5-3.5 wt % Cr, 2. This invention was made with Government support under contract DE-AC... | 03/08/1994 |
| 5182079 | Metallic composition and processes for use of the same The invention provides a novel metallic composition and method of using the same. More particularly, the invention affords a tool steel and a method of heat treating the tool steel. In one of the preferred embodiments the tool steel includes about 0.50 to... | 01/26/1993 |
| 5112411 | Process of making mining/construction tool bit body fabricated from MN/B steel alloy composition A mining and construction bit body is composed of a Mn-B steel alloy composition. The alloy content of the composition in percents by weight includes: carbon, 0.33-0.38; manganese, 1.10-1.35; boron, 0.0005 minimum; silicon 0.15-0.30; sulfur, 0.045 maximum... | 05/12/1992 |
| 4946515 | High strength, high toughness steel and method of manufacturing thereof A relatively low cost, high strength, high toughness bar and sheet steel, which is substantially non-susceptible to the formation of delayed surface cracks in the as-rolled condition and its method of preparation, are provided, the constitution of the ste... | 08/07/1990 |
| 4618379 | Method for the continuous annealing of steel strips This invention relates to the continuous annealing of moving steel strips. A rapid quenching between the annealing treatment and the overaging process is effected in an electrolytic pickling bath, in which the steel strip acts first as a cathode and there... | 10/21/1986 |
| 4440583 | Method of controlled cooling for steel strip In controlledly cooling steel strip in a continuous annealing line, the heat transfer rate needed for attaining the desired cooling rate is calculated from an equation including strip thickness, the cooling starting and finishing temperatures, and the des... | 04/03/1984 |
| 4361448 | Method for producing dual-phase and zinc-aluminum coated steels from plain low carbon steels The invention relates to a method for producing coated high strength low alloy steel. A strip of steel is cleaned from rolling oil, is heated to the temperature range A1 to A3 in a protective atmosphere, is soaked and subsequently qu... | 11/30/1982 |
| 3972751 | Method of heat treating ferrous workpieces A novel method of and apparatus for automatically heat treating ferrous work rapidly from austenite stage temperature through the martensite stage and automaticaally slowly cooling the same thereafter to impart uniform hardness and other desired character... | 08/03/1976 |
| 3963535 | Method for controlling quenching A method for regulated cooling of hot objects by liquid medium or media in which the cooling is varied by varying the pressure under which said cooling takes place, and means for carrying out the method, said means comprising an open or closed container f... | 06/15/1976 |
| 3944444 | Method for heat treating cylindrical products Method and apparatus for producing cylindrical products having a range of hardness through a cross section such as a roll. The method includes conventional forging and heat treatment steps with or without the addition of a rapid water quench derived from ... | 03/16/1976 |
