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| Number | Title | Issue Date |
| 7115177 | Method for the treatment of metallic materials In a method for the treatment of metallic materials especially for the consolidation of the texture of the materials, a blank of the metallic material is heated to a transformation temperature and the blank is then subjected to twisting preferably while, at the same... | 10/03/2006 |
| 7077993 | Apparatus for softening a selected portion of a steel object by heating Differential hardening apparatus for softening a portion only of a metal workpiece such as a die block consisting of apparatus for presenting a workpiece to a heat source which impinges heat directly on the workpiece and control means for causing the heat to be dire... | 07/18/2006 |
| 6903296 | Method of making a metallic component A metallic component is made by heating with subsequent hardening by rapid cooling. In the component unhardened regions remain, in that the component is electrically resistant heated and defined regions, either by partial resistance heating of the other regions, by ... | 06/07/2005 |
| 6632302 | Method and means for heat treating cutting tools Apparatus for heat treating a cutting tool comprises a furnace and a tool holder within the furnace adapted to receive therein a first portion of the tool, a second portion of the tool projecting from the tool holder, the second portion of the tool being ... | 10/14/2003 |
| 6398885 | Method and apparatus for preventing cracking of the shank junction of die blocks A method and apparatus for tempering the shank portion only of die blocks which comprises subjecting the shank portion of a die block or other large metal part to electrical energy derived from induction heating or infrared heating to a controlled depth, ... | 06/04/2002 |
| 6368428 | Method of adjusting two shielding elements and an associated assembly A method of adjusting two shielding elements and including transporting a metal strip on a roller table, shielding a cooling medium from the edge regions of the metal strip with adjusting shielding elements, and adjusting the shielding elements asymmetric... | 04/09/2002 |
| 6344098 | High strength steam turbine rotor and methods of fabricating the rotor without increased stress corrosion cracking A heat treatment process is provided that produces a monoblock, low alloy steel rotor for use in low pressure steam turbines. The process includes austenitizing the rotor at a substantially uniformly applied treatment temperature of about 840° C., quench... | 02/05/2002 |
| 6174389 | Fixture and method for selectively quenching a predetermined area of a workpiece An apparatus and method for excluding specific areas of a workpiece from quenching during a heat treat process. A workpiece, having preselected areas to be quenched, is positioned in a manner so that quench sprays are aimed toward the surface to be quench... | 01/16/2001 |
| 5916389 | Method of producing a sheet steel product such as a reinforcement element in a larger structure A product of sheet steel is formed in a pair of cooled tools when hot and is then hardened to a martensitic structure while still in the tools. In this manner, the tools function as a fixture while the steel is hardening. The steel is kept mild in the are... | 06/29/1999 |
| 4737202 | Method of producing steel components that simultaneously have high strength and high ductility and which retain these properties even after a hot forming operation A steel with a carbon content of less than 0.3 percent by weight is used for steel-based components which are subjected to hot forming. A predominantly lower bainite structure is achieved by controlled cooling. The advantage is that components, such as tr... | 04/12/1988 |
| 4737201 | Solution heat treatment of engine poppet valves and valves made therefrom An engine poppet valve is manufactured to have a microstructure that varies by location to match the stresses, temperature, wear and other conditions encountered in service. The microstructure is characterized by a coarse grain size in the head adjacent i... | 04/12/1988 |
| 4596615 | Method of cooling hot steel plates Hot steel plate as hot-rolled is passed forward longitudinally through pairs of top and bottom rollers disposed in the direction of the plate travel. The steel plate is cooled with water supplied to its top and bottom surfaces from the nozzles on a plural... | 06/24/1986 |
| 4547229 | Solution heat treating of engine poppet valves A new solution heat treated engine poppet valve has been developed which has a microstructure characterized by a large grain size in the head for optimum high temperature creep and fatigue properties and a finer grain size in the stem for good low tempera... | 10/15/1985 |
| 4440584 | Method and apparatus for cooling steel sheet A method and an apparatus for cooling a steel sheet, which comprises: ejecting cooling water onto a steel sheet laid horizontally from above and from below said steel sheet immediately after the completion of hot rolling to cool said steel sheet; shieldin... | 04/03/1984 |
| 4394195 | Cooling of center plate to avoid softening In accordance with the invention, an insulating box (32) is applied to the depending portion (28) of the center plate (24) of a railway freight car. This box is provided with external insulation (27) and a cooling medium such as air or water is passed thr... | 07/19/1983 |
| 4323404 | Method for providing single piece with plural different mechanical characteristics A method for producing a single solid metal work piece having different mechanical characteristics in different sections. A groove is cut in the piece between each section. A partitioning wall is inserted in the groove with the remainder of the groove fil... | 04/06/1982 |
| 4305272 | Agricultural discs Agricultural discs are given a hardened annular run by providing a differential heat treatment. During the heat treatment step an annular ring of heat conductive material is placed on the outer periphery of the disc. Thus ensures that the outer edge is of... | 12/15/1981 |
| 4268246 | Method and apparatus for metal object heat treatment Apparatus comprising a metal shell enclosing a spaced adapted to be heated, low heat retention, thermal shock resistant insulation on one substantially entire surface of the metal shell, a heater to heat the space enclosed by the metal shell, a vent for h... | 05/19/1981 |
| 4155780 | Method for prestressing turbine disks A method for adding a residual compressive stress to the rim of a turbine disk by heating the disk to a uniform high temperature, then insulating the rim from the remainder of the disk and cooling to a temperature wherein the rim yields in tension.... | 05/22/1979 |
| 4062705 | Method for heat treatment of high-toughness weld metals A method for obtaining a weld metal having excellent toughness at low temperatures as below -40° C, which method comprises heating the weld metal having a specific steel composition to its austenitizing temperature and cooling it or holding it at the tem... | 12/13/1977 |
