| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 07/12/1989 | CN1033840A Vacuum furnace for heat treatment of metallic workpieces |
| 07/12/1989 | CN1033839A Temp.-increasing and-varying quench technology for steel |
| 07/11/1989 | US4846903 Method for producing a grain oriented electrical steel sheet |
| 07/11/1989 | US4846448 Apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material |
| 07/05/1989 | EP0323362A1 Adaptive method of transform coding and decoding a sequence of pictures, and devices for carrying out this method |
| 07/05/1989 | CN1004708B Making-up method of heating salt bath for quenching hand saw blade |
| 07/04/1989 | US4845328 Apparatus for and method of induction-hardening machine components |
| 07/04/1989 | US4844752 Process for making internally hardened tubes |
| 07/04/1989 | US4844427 Quenching apparatus |
| 06/29/1989 | WO1989005865A1 Carburized low silicon steel article and process |
| 06/29/1989 | WO1989005707A1 Laser surface treatment |
| 06/28/1989 | EP0322156A1 High nickel chromium alloy |
| 06/28/1989 | CN2040102U Moving-coil type pid pulse carbon quantity controller |
| 06/27/1989 | US4842655 Heating to critical temperature, cooling surfaces to result in plastic flow |
| 06/27/1989 | CA1256355A1 Method and apparatus for cooling steel strip |
| 06/21/1989 | EP0321370A1 Process for modifying the cooling power of aqueous liquids for quenching metal alloys |
| 06/21/1989 | EP0321109A2 Thermocouple selection switch |
| 06/21/1989 | EP0320763A1 Method for the heat treatment of metals |
| 06/20/1989 | US4840560 Heating stock in a heating chamber |
| 06/20/1989 | US4840353 Apparatus for studying quenching fluids and quenchability of materials |
| 06/15/1989 | WO1989005431A1 Long life cover for heat chamber |
| 06/14/1989 | EP0320003A1 Method of producing steel having a low yield ratio |
| 06/13/1989 | US4838956 Method of producing a spheroidal graphite cast iron |
| 06/13/1989 | US4838785 Walking beam furnace insulation |
| 06/07/1989 | EP0319397A1 Laser shock treatment of materials |
| 06/07/1989 | EP0318875A1 Process for rejuvenating the ductility of brittle amorphous alloys |
| 06/06/1989 | US4836866 Quenching stretched heated tensioned metal bars |
| 06/06/1989 | US4836864 Method of gas carburizing and hardening |
| 06/06/1989 | US4836776 Furnace for heat treatment in vacuo with cooling by a stream of gas |
| 05/31/1989 | EP0317832A1 Multi-tier load fixture for a top-loading furnace |
| 05/31/1989 | EP0317830A2 A method of bending metal objects |
| 05/31/1989 | EP0215830B1 Plant for cooling by spraying means |
| 05/30/1989 | US4834345 Process and apparatus for direct softening heat treatment of rolled wire rods |
| 05/30/1989 | US4834344 Apparatus for inside-outside tube quenching |
| 05/30/1989 | CA1254953A1 Rail head inductor |
| 05/24/1989 | EP0317407A1 Process for thermal treatment in a gas atmosphere based on nitrogen and hydrocarbon |
| 05/24/1989 | DE3825839A1 Vorrichtung zum kuehlen und zum hydraulischen transport von unsymmetrischen walzprofilen Apparatus for cooling and hydraulic transport of unbalanced rolled profiles |
| 05/24/1989 | CN2038107U Composite field-effect quenching tank |
| 05/23/1989 | US4832764 Process for the low-distortion thermomechanical treatment of workpieces in mass production as well as application of the process |
| 05/23/1989 | US4832757 Pumps, carbon, manganese, molybdenum steels |
| 05/17/1989 | EP0315975A1 Process for rapid quenching |
| 05/17/1989 | EP0315787A1 Improving fatigue life of component such as a bar |
| 05/17/1989 | CN2037737U Horizental annealer |
| 05/16/1989 | US4830686 Low yield ratio high-strength annealed steel sheet having good ductility and resistance to secondary cold-work embrittlement |
| 05/16/1989 | US4830611 Process for welding a railway rail, aluminothermic heating blocks for use in the process, and method of making said aluminothermic heating blocks |
| 05/16/1989 | US4829656 Process for making hot-rolled steel strip |
| 05/10/1989 | EP0315590A2 Convection cooling vessel for materials exhibiting surfaces |
| 05/10/1989 | EP0314876A1 Apparatus for applying anti-sticking agent on annealed oriented electrical sheet steel in coil |
| 05/10/1989 | CN1032819A Physical strengthening for low carbon martensitic stainless steel |
| 05/09/1989 | US4828227 Inductor for the inductive reheating of metallurgical products |
| 05/03/1989 | EP0314145A1 Method for manufacturing steel article having high toughness and high strength |
| 05/03/1989 | EP0314144A1 Method for manufacturing steel article having high toughness and high strength |
| 05/03/1989 | EP0313889A1 Vacuum furnace for the heat treatment of metallic work-pieces |
| 05/03/1989 | EP0313888A1 Method for the heat treatment of metallic work pieces |
| 05/03/1989 | EP0313669A1 Ejector apparatus of fluidized bed heat-treating furnace |
| 05/03/1989 | CN1004080B Annealing-oxidating method for high strength bolts |
| 05/03/1989 | CN1004079B Aq. solution quenching medium for high-speed steel |
| 05/02/1989 | US4826545 Method of heat treating metal parts using a washable synthetic quenchant |
| 05/02/1989 | US4826542 Temperature control |
| 05/02/1989 | US4825807 Apparatus for applying anti-sticking agent on annealed oriented electrical sheet steel in coil |
| 04/27/1989 | DE3734169A1 Verfahren zum warmbadhaerten von gegenstaenden aus legierten staehlen Steels alloyed method for Martempering of objects from |
| 04/26/1989 | EP0312909A1 Vacuum chamber type furnace |
| 04/25/1989 | US4825035 Control apparatus for energy beam hardening |
| 04/25/1989 | US4824492 Method for producing a precipitation hardenable martensitic low alloy steel forging |
| 04/25/1989 | US4823599 Method of operating a machine for the stress relief of workpieces by vibration |
| 04/25/1989 | CA1253054A1 Method for the surface hardening of drill rod couplings, and the rods thus obtained |
| 04/20/1989 | WO1989003433A1 Process for hot quenching of alloyed steel objects |
| 04/19/1989 | EP0311753A1 Device for changing tools in quenching machines |
| 04/19/1989 | CN1032428A Automatical device for rapid heat chemical processing |
| 04/18/1989 | US4821386 Method of producing a rolling bearing race |
| 04/12/1989 | EP0311030A1 Process for annealing metallic work pieces in a continuous furnace |
| 04/12/1989 | EP0310809A1 Process for continuously desludging salt baths |
| 04/12/1989 | CN2035663U Water-cooling device for bar and wire material |
| 04/11/1989 | US4821285 Thermocouple selection switch |
| 04/11/1989 | US4820150 Walking beam type reheating furnace |
| 04/11/1989 | US4819917 Apparatus for deburring workpieces by gas detonation |
| 04/06/1989 | WO1989002937A1 A method and arrangement for supplying liquid to an oven |
| 04/06/1989 | WO1989002936A1 Die-less drawing method and apparatus |
| 04/05/1989 | EP0309973A1 Process for thermal treating of workpieces in solid state by a laser beam |
| 04/04/1989 | US4818303 Fused salt bath tanks |
| 04/04/1989 | US4818302 Method of heat treatment |
| 03/29/1989 | EP0309354A1 Automatic apparatus for fast thermochemical treatment |
| 03/29/1989 | CN1032073A Apparatus and method for deep cryogenic treatment of materials |
| 03/28/1989 | US4816090 Heat treated cold rolled steel strapping |
| 03/28/1989 | US4816089 Process for heat treating a heat exchanger tube surrounded by a support plate |
| 03/28/1989 | US4815971 Multi-tier load fixture for a top-loading furnace furnace |
| 03/23/1989 | DE3824261C1 Method for producing recesses, serving to receive lubricant, on workpiece surfaces |
| 03/22/1989 | EP0308361A1 Process for manufacturing steel pressure vessels |
| 03/22/1989 | EP0307905A2 Method for producing grainoriented electrical steel sheet with very high magnetic flux density |
| 03/21/1989 | US4814026 Method of producing composite welded components |
| 03/21/1989 | US4813653 Fluidized bed apparatus |
| 03/21/1989 | US4813652 Plant for effecting the controlled cooling of metal sheets |
| 03/15/1989 | EP0307386A1 Process for producing a titanium alloy, and use of a spraying apparatus for carrying out the process |
| 03/15/1989 | EP0306837A1 Electric furnace in particular for thermic treatment |
| 03/14/1989 | US4812608 Oven for thermo-magnetic treatment of toroidal coils of amorphous ferro-magnetic ribbon material |
| 03/14/1989 | US4811584 Thermal processing methods |
| 03/09/1989 | WO1989001841A1 Method and device for laser processing of an object |
| 03/09/1989 | DE3803973C1 Apparatus for quenching elongated cylindrical pressure vessels |
| 03/08/1989 | EP0305966A1 Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property |
| 03/08/1989 | CN2033818U High-frequency induction automatic hardening device |