| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 03/03/1982 | EP0046567A2 Inhibited annealing of ferrous metals containing chromium |
| 03/02/1982 | US4317687 Carburizing process utilizing atmospheres generated from nitrogen-ethanol based mixtures |
| 02/18/1982 | WO1982000475A1 Protecting steel during heat treatment |
| 02/09/1982 | US4315130 Method of treating object by laser beam and apparatus therefor |
| 02/09/1982 | US4315124 Heating modules for billets in inductive heating furnaces |
| 02/09/1982 | US4314861 Manufacturing method of elbows made of cast stainless steel |
| 02/09/1982 | US4314790 Method of and device for shipping hot metal goods |
| 02/03/1982 | EP0045207A1 Protecting steel during heat treatment |
| 02/03/1982 | EP0044853A1 Device for sealing a fluidized bed. |
| 02/02/1982 | US4313772 Continuous heat-treatment process for steel strip |
| 02/02/1982 | US4313771 Laser hardening of steel work pieces |
| 01/26/1982 | US4312685 Axial reciprocation of torch and camshaft |
| 01/26/1982 | US4312683 Suppression of induced magnetic anisotropy |
| 01/26/1982 | US4312094 Apparatus for rapidly cooling elongated metallic products during their movement in longitudinal direction by a liquid cooling jet and for removing the latter from the surface of the product after the cooling |
| 01/20/1982 | EP0043866A1 Process for producing a high-toughness steel |
| 01/19/1982 | US4311537 Low-cobalt Fe-Cr-Co permanent magnet alloy processing |
| 01/19/1982 | US4311454 Method of soaking steel pieces |
| 01/13/1982 | EP0043705A2 Aluminoborosilicate glasses and their use as protective and lubricating coatings in the heat treatment of metals |
| 01/12/1982 | US4310381 Method for improving magnetic properties of metallic glass ribbon |
| 01/12/1982 | US4310301 Combination burner and exhaust gas recirculation system for a carbottom furnace |
| 01/12/1982 | CA1116057A1 Heat treatment methods for annealing cast iron pipes |
| 12/23/1981 | EP0042029A1 Conveyor roll for an annealing furnace |
| 12/22/1981 | US4307276 Induction heating method for metal products |
| 12/22/1981 | CA1114656A1 Process for sintering powder metal parts |
| 12/22/1981 | CA1114591A1 Method for manufacturing shaft seals |
| 12/15/1981 | US4305765 Cooling metal products |
| 12/15/1981 | US4305574 Quenching device |
| 12/09/1981 | EP0041317A1 Method and apparatus for inductively heating valve seat inserts for hardening the seat surfaces |
| 12/08/1981 | US4304978 Heat treating using a laser |
| 12/01/1981 | US4303699 For use with high density recording |
| 12/01/1981 | US4303228 Apparatus for heat treating containing air-purged molecular sieves in O.sub. -free N2 atmospheres |
| 12/01/1981 | US4303137 Method for making a cone for a rock bit and product |
| 11/25/1981 | EP0040553A1 Process for producing a dual-phase steel |
| 11/18/1981 | EP0040094A1 Carburizing process utilizing atmospheres generated from nitrogen-ethanol based mixtures |
| 11/17/1981 | US4300376 Cooling of rolled metal products |
| 11/17/1981 | CA1112549A1 Method of producing steel sections of improved quality |
| 11/12/1981 | WO1981003184A1 Method of heating,holding or heat treatment of metal material |
| 11/12/1981 | WO1981003183A1 Method and device for heat treatment of moving lengthy articles |
| 11/11/1981 | EP0039659A1 Method for the production of black surfaces on metal |
| 11/11/1981 | EP0039630A1 Skid provided with refractory ledges for a walking beam furnace |
| 11/10/1981 | US4299401 Piston ring and method of making same |
| 11/10/1981 | CA1112136A1 Method of stabilizing viscosity and increasing concentration of aqueous magnesia slurry |
| 11/03/1981 | US4298409 Annealing for high frequency applications |
| 11/03/1981 | US4298189 Apparatus for the continuous hardening of pump casings |
| 11/03/1981 | US4298188 Machines for cooling metal sheets or like products |
| 10/28/1981 | EP0038673A2 Apparatus and process for delivering liquid cryogen |
| 10/27/1981 | US4296610 Liquid cryogen delivery system |
| 10/21/1981 | EP0038257A1 Oxygen aspirator burner and process for firing a furnace with an oxygen-enriched oxidant gas |
| 10/20/1981 | US4295902 Method of manufacturing rolled steel products with high elastic limit |
| 10/14/1981 | EP0037752A1 Device for guiding webs and its applications |
| 10/13/1981 | US4294436 Furnace with protective atmosphere for heating metals |
| 10/13/1981 | US4294102 Device for bending and hardening bar material |
| 10/13/1981 | US4294098 Apparatus for manufacturing steel spring leaves |
| 10/13/1981 | CA1110425A1 Method of manufacturing an amorphous alloy |
| 10/07/1981 | EP0036900A1 Method and apparatus for reclaiming spent quenching salt |
| 10/06/1981 | CA1110196A1 Non slipping driving and braking engines for sliding material through heat treatment zones |
| 10/06/1981 | CA1110144A1 Water spray quench process and apparatus |
| 09/29/1981 | US4292097 High tensile strength steel sheets having high press-formability and a process for producing the same |
| 09/23/1981 | EP0036035A2 Method and apparatus for controlling tensions in a continuous steelstrip annealing furnace |
| 09/22/1981 | US4290829 Process for box annealing a steel strip coil |
| 09/22/1981 | US4290827 Annealing, tempering in magnetic cross-field |
| 09/22/1981 | US4290808 Metallic glass powders from glassy alloys |
| 09/22/1981 | US4290457 Truncated triangular insulator |
| 09/22/1981 | CA1109371A1 Continuous heat-treatment process for steel-strip |
| 09/22/1981 | CA1109255A1 Protective refractory member |
| 09/17/1981 | WO1981002585A1 Arrangement for cooling metal workpieces |
| 09/16/1981 | EP0035865A2 Vertical-shaft type kiln provided with means for transporting goods therethrough |
| 09/15/1981 | CA1108970A1 Method of induction heat treating, quenching and tempering of structural members |
| 09/15/1981 | CA1108851A1 Vacuum furnace with cooling means |
| 09/09/1981 | EP0035401A1 Heat treatment of steel work pieces |
| 09/08/1981 | US4288219 Refractory insulated member and method of installation thereof in a reheat furnace |
| 09/08/1981 | US4288062 Apparatus for control and monitoring of the carbon potential of an atmosphere in a heat-processing furnace |
| 09/08/1981 | CA1108398A1 Jet recirculation method for vacuum carburizing |
| 09/02/1981 | EP0034761A2 Method for the surface improvement of machine parts and cutting tools of ferrous alloys |
| 09/01/1981 | US4287006 Said separator being a mixture of magnesium oxide, magnesium hydroxide, and an aluminum compound |
| 09/01/1981 | CA1108044A1 Skid pipe covering |
| 08/25/1981 | US4285741 Process for producing high-strength, low yield ratio and high ductility dual-phase structure steel sheets |
| 08/25/1981 | CA1107575A1 Method for applying scale-converting agent on a hot steel strip and an apparatus therefor |
| 08/20/1981 | WO1981002309A1 Furnace for heating articles |
| 08/20/1981 | WO1981002258A1 Method of sealing at fluidized bed and device for carrying out the method |
| 08/19/1981 | EP0033878A2 Method for treating an electromagnetic steel sheet by laser-beam irradiation |
| 08/18/1981 | CA1107179A1 Method for making a hard steel elongated element |
| 08/12/1981 | EP0033403A1 Method of treating the surfaces of high carbon steel bodies and bodies of high carbon steel |
| 08/04/1981 | US4282048 Method for cooling hot-rolled shapes |
| 08/04/1981 | US4281984 Method of heating a side-burner type heating furnace for slab |
| 08/04/1981 | CA1106265A1 Heat treating and tempering of forged workpieces |
| 08/04/1981 | CA1106246A1 Rotor for an open end spinning machine |
| 07/29/1981 | EP0032755A2 Walking-beam type furnace with supporting plates |
| 07/28/1981 | US4280807 Autoclave furnace with cooling system |
| 07/28/1981 | CA1105783A1 Boronizing-resistant removable polymeric paints |
| 07/21/1981 | US4279406 Plant for generating an atmosphere for the heat treatment of metals |
| 07/21/1981 | CA1105254A1 Heating assembly for a heat treating furnace |
| 07/14/1981 | US4278421 Industrial furnaces for the heat treatment of metallic workpieces |
| 07/14/1981 | CA1104910A1 Method of treating strip surfaces for metallic coating |
| 07/08/1981 | EP0031517A1 Gas-liquid cooling apparatus |
| 07/07/1981 | US4277322 Compressible, porous ceramic boot over metal electrode |
| 07/07/1981 | US4276979 Slab cooling and conveying apparatus |
| 07/01/1981 | EP0031034A1 Process for the adjustable carburizing or heating in a protective gas of steel work pieces |
| 07/01/1981 | EP0031012A1 Steel strip continuous annealing apparatus |
| 06/30/1981 | US4275771 Interlocking truncated triangular insulator |