| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 11/07/1990 | CN1046763A Mn alloy steel |
| 10/31/1990 | EP0395191A1 Method of and device for cooling a long cylindrical body |
| 10/30/1990 | US4966632 Process for the annealing treatment of metal strips |
| 10/30/1990 | US4966348 Method and apparatus for monitoring atmosphere in furnaces |
| 10/30/1990 | US4966269 Clutch disc having a hub disc and a sintered steel hub blank and a method of producing the clutch disc |
| 10/25/1990 | DE3823670A1 Process and apparatus for heating preforms |
| 10/24/1990 | EP0393137A1 Carburized low silicon steel article and process. |
| 10/18/1990 | WO1990012124A1 Sticker for preventing carburization, nitridation or oxidation, and method of preventing carburization, nitridation or oxidation |
| 10/17/1990 | EP0392889A1 A heating furnace |
| 10/17/1990 | CN1046218A Means of controlling gas flow in vakuum furnaces |
| 10/16/1990 | US4963091 Method and apparatus for effecting convective heat transfer in a cylindrical, industrial heat treat furnace |
| 10/11/1990 | DE3933930A1 Anordnung zur steuerung der walgutabkuehlung Arrangement for controlling the walgutabkuehlung |
| 10/11/1990 | DE3923673A1 Inductive heating element for bearing surfaces - made of fixed jaw and movable jaw which rotated around bearing surface, movable longitudinally over bearing surface |
| 10/11/1990 | DE3910959A1 Verfahren zum herstellen von waelzlagerelementen aus durchhaertendem waelzlagerstahl Method for the manufacture of waelzlagerelementen from durchhaertendem waelzlagerstahl |
| 10/11/1990 | DE3910280A1 Method for the remelt-hardening of metallic workpieces |
| 10/10/1990 | EP0391881A2 Machine element, particularly tool holder with high vibration stability and process for its manufacture |
| 10/10/1990 | CN2063522U Machine controlled by microcomputer for crankshaft middle frequency quenching |
| 10/03/1990 | EP0389889A1 Operational device for gas streams in vacuum furnaces |
| 10/02/1990 | CA1274756A1 Alloy toughening method |
| 09/30/1990 | CA2013083A1 Means of controlling gas flows in vacuum furnaces |
| 09/26/1990 | EP0388437A1 Long life cover for heat chamber. |
| 09/25/1990 | US4959107 Heat treatment of aluminum alloy |
| 09/19/1990 | EP0388333A1 Apparatus for performing sequences of continous heat treatments in vacuum |
| 09/19/1990 | EP0388332A1 Device for pressurised injection of large quantities of gas into a closed receptacle and recovery of the gas |
| 09/19/1990 | CN1045421A Improvements in scanning induction hardening |
| 09/17/1990 | CA2012269A1 Device for injecting gas under high pressure and high flow rate into an airtight chamber and recovery of the gas |
| 09/05/1990 | EP0385284A1 Process and apparatus for heat treating with low distortion of hardenable materials and where in at least a partial recycling of the cooling and the washing fluid is effected |
| 09/05/1990 | EP0384964A1 Process and apparatus for induction hardening of the corrugated surfaces of a workpiece |
| 09/04/1990 | US4954183 Lead heat treatment of wire with prevention of lead entrainment |
| 09/04/1990 | US4953832 Apparatus for the controlled cooling of hot rolled steel samples |
| 08/30/1990 | DE3905551A1 Method and apparatus for treating surfaces by means of laser beam |
| 08/28/1990 | US4952250 Method for manufacturing steel article having high toughness and high strength |
| 08/23/1990 | WO1990009459A1 Method for thermal treatment of high-speed steel |
| 08/23/1990 | WO1990009458A1 Improvements in scanning induction hardening |
| 08/23/1990 | DE3905347A1 Method for providing erosion protection for turbine blades |
| 08/22/1990 | EP0382763A1 A method and arrangement for supplying liquid to an oven |
| 08/21/1990 | US4950338 Prevention of dimensional distortiion |
| 08/21/1990 | US4950337 Magnetic and mechanical properties of amorphous alloys by pulse high current |
| 08/21/1990 | US4950335 Process for producing articles for magnetic use |
| 08/21/1990 | US4950334 Gas carburizing method and apparatus |
| 08/16/1990 | EP0382125A1 Method and apparatus for thermal suface-hardening of metallic workpieces |
| 08/14/1990 | US4948675 Separating-agent coatings on silicon steel |
| 08/14/1990 | US4948625 Method for forming surface layer by electric discharge process |
| 08/14/1990 | CA1272583A1 Method of constructing a magnetic core |
| 08/09/1990 | DE3903727A1 Method and apparatus for the thermal treatment of metal coils |
| 08/09/1990 | DE3903726A1 Method and apparatus for the thermal treatment of metal coils |
| 08/07/1990 | US4946516 Heating, hot rolling, quenching and tempering a slab composed of carbon, silicon, manganese, nickel, molybdenum, chromium, a luminum and iron at controlled temperatures |
| 08/02/1990 | DE3926733A1 Forming scale layer on hardenable steel - esp. piercing mandrel, without rim decarburisation |
| 08/01/1990 | EP0380144A1 Process for producing optically active benzene-sulfonamide derivatives |
| 07/31/1990 | US4944805 Method of heat treatment amorphous soft magnetic film layers to reduce magnetic anisotropy |
| 07/31/1990 | US4944174 Process for cooling heated material |
| 07/25/1990 | EP0379104A1 Process for annealing metal work pieces in a hydrogen-enriched protective atmosphere in a continuous furnace |
| 07/25/1990 | EP0218677B1 Corrosion inhibiting quenchant compositions |
| 07/25/1990 | CN1044155A Process for increasing pre-loading bearing precision |
| 07/18/1990 | CN1043958A Improvement in automatic apparatus of heat treatment |
| 07/17/1990 | CA1271649A1 Formable, temperature-resistant martensitic steel having enhanced resistance to wear |
| 07/12/1990 | WO1990007584A1 Device for hardening the surfaces of workpieces of different lengths |
| 07/12/1990 | WO1990007583A1 Automated thermal processing installation |
| 07/11/1990 | CN2059166U Rapid cool cover |
| 07/10/1990 | US4940521 Process and apparatus for pretreating the surface of a single-layer or multilayer molded material by means of an electrical corona discharge |
| 07/10/1990 | CA1271395A1 Annealing of thermally insulated core |
| 07/04/1990 | EP0376832A1 Automatic thermal treatment installations |
| 07/03/1990 | US4939042 Fatigue life of a component such as a bar |
| 07/03/1990 | US4938460 Apparatus for air quenching railway heads |
| 07/03/1990 | US4938266 Hot rolling, quenching, reheating, water-cooling, and tempering; high strength |
| 06/28/1990 | DE3843284A1 Torch head for a torch for TIG remelt hardening |
| 06/27/1990 | EP0375491A1 Method and installation for heat treatment for case-hardening, carbonitriding or heating before the quenching of metallic work pieces |
| 06/27/1990 | EP0375477A1 Process for producing an atmosphere for thermal treatment by air separation by permeation |
| 06/27/1990 | EP0374389A2 Process for the pretreatment of parts for a composite camshaft |
| 06/27/1990 | EP0374373A1 Process and device for the low distortion hardening of crankshafts |
| 06/27/1990 | CN2058680U Laser processor |
| 06/27/1990 | CN1043385A Stove for heating, insulating and store of metallurgical products |
| 06/27/1990 | CA2004761A1 Automatic thermal processing facilities |
| 06/26/1990 | US4936926 Hot working, controlled cooling |
| 06/26/1990 | CA1270732A1 Methanol vaporization of metal processing furnaces and the like |
| 06/26/1990 | CA1270731A1 Method of thermal deburring of metal parts |
| 06/21/1990 | DE3941338A1 Improving wear and pin-hole corrosion properties of cast iron - by remelting surface of casting and quenching to reduce size of modular graphite |
| 06/21/1990 | DE3842372A1 Device for the heating of metallic workpieces |
| 06/19/1990 | US4934445 Process and device for cooling an object |
| 06/14/1990 | WO1990006379A1 Furnace for reheating, holding and storing steelworks products |
| 06/13/1990 | EP0372850A1 Improvements in or relating to the heating of substances |
| 06/13/1990 | CN1042945A Improvements in scanning induction hardening |
| 06/12/1990 | US4933023 Method for manufacture of non-allergy creating precious metal objects |
| 06/12/1990 | US4932864 Roller hearth type heat treating furnace |
| 06/05/1990 | US4931108 Method of heat treatment of rolled steel material using foams impregnated with water soluble polymers |
| 06/05/1990 | US4931107 Process for producing a cold rolled steel sheet having a good ageing resistance by continuous annealing |
| 06/05/1990 | EP0328603A4 Control of straightness in scanning induction hardening of steel. |
| 05/30/1990 | EP0370916A1 Furnace for reheating, holding and storing of metallurgical products |
| 05/30/1990 | EP0370872A1 Process for producing an atmosphere for thermal treatment by air separation by adsorption |
| 05/30/1990 | EP0370061A1 Method and apparatus for forming bainite |
| 05/30/1990 | CN1042569A Laser heat-treament for the shell of spherulitic iron steering gear of rare-earth ferrite |
| 05/29/1990 | US4929283 Precipitation hardeing, quenching |
| 05/25/1990 | CA2003834A1 Steel products heating, keeping and accumulating oven |
| 05/24/1990 | CA2003473A1 Method for controlling atmosphere in heat treatment process by way of permeation |
| 05/24/1990 | CA2003472A1 Method for controlling atmosphere in heat treatment process by way of adsorption |
| 05/22/1990 | US4927469 Heating; aluminum-iron-cerium alloy |
| 05/22/1990 | CA1269418A1 Multi-wire induction heating |
| 05/16/1990 | EP0368035A1 Apparatus for the discontinuous desludging of salt baths |
| 05/16/1990 | CN1042187A Remelting hardening technique for the surface of ductile iron workpieces |
| 05/15/1990 | CA1268957A1 Method for producing rolled steel products, particularly threaded steel tension members |