| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 05/10/1990 | DE3937197A1 Multicell compressor - with borided high carbon pearlitic steel blades |
| 05/10/1990 | DE3837980A1 Heat treatment process for improving the resistance of hardenable steels of high chromium content to pitting and intergranular corrosion by the application of double hardening |
| 05/09/1990 | EP0366862A1 Hardening installation comprising a low-induction suspension gear |
| 05/09/1990 | CN2056924U Guiding sleeve type hydraulic induction-quenching machine tool with short guiding column |
| 05/09/1990 | CN1007896B Method for producing nontoxic quenching agent |
| 05/08/1990 | US4924062 Method for hardening discrete identical elements integral with a common structure and regularly separated from each other and device for embodying this method |
| 05/08/1990 | US4924052 Processing grain-oriented "electrical" steel |
| 05/08/1990 | US4923528 Method for manufacturing rolled steel products |
| 05/08/1990 | CA1268690A1 Protective atmosphere process for annealing and/or hardening ferrous metals |
| 05/02/1990 | EP0366639A2 Device for cooling a moving cylindrical member |
| 05/02/1990 | EP0365985A1 Steel alloys containing boron, and process for annealing the same |
| 05/02/1990 | EP0365543A1 System for peripheral differential heat treatment to form dual-property workpieces. |
| 05/01/1990 | USH777 Method for jet gas impingement quenching |
| 05/01/1990 | US4921549 Promoting directional grain growth in objects |
| 05/01/1990 | US4921025 Carburized low silicon steel article and process |
| 05/01/1990 | US4920998 Method and apparatus for controlling flow bias in a multiple zone process |
| 04/26/1990 | DE3926571C1 Inductor head for piston engines - consists of inductor loop following periphery of cylinder around radial laminated yokes |
| 04/25/1990 | EP0364709A1 Method of producing a gas-annealing atmosphere in a heat-treating device |
| 04/25/1990 | CN2056426U Quench spontaneous gas protection heating adjustable device |
| 04/25/1990 | CN1007752B Combustion apparatus and process for baking block carbon in chamber |
| 04/24/1990 | US4919177 Rearranging crystal orientation; heat, electric current, elongation, cooling |
| 04/24/1990 | CA2001183A1 Apparatus for cooling a cylindrical member in linear motion |
| 04/22/1990 | CA2001163A1 Boron-containing steels and process for their annealing |
| 04/17/1990 | US4917736 Method of transforming a passive ferromagnetic material into a permanent magnet |
| 04/17/1990 | US4917358 Apparatus for producing electrical steel core laminations |
| 04/11/1990 | EP0362736A2 Oxygen probe for a heat treatment oven |
| 04/11/1990 | CN2055824U 钢球淬火机 Ball hardening machine |
| 04/10/1990 | US4915622 Fluid barrier curtain system |
| 04/10/1990 | US4915361 Treatment apparatus for parts |
| 04/05/1990 | WO1990003449A1 Process and device for surface hardening of crack-prone work pieces |
| 04/05/1990 | WO1990003218A1 An endothermic gas generator |
| 04/05/1990 | DE3840812A1 Verfahren und anlage zur kontinuierlichen herstellung von stahlband oder stahlblech nach dem stranggussverfahren Method and system for the continuous production of steel strip or sheet steel for the continuous casting process |
| 04/05/1990 | DE3833067A1 Process for operating a heat treatment furnace provided with burners |
| 04/04/1990 | EP0360955A2 Process for producing a cold rolled steel sheet having a good ageing resistance by continuous annealing |
| 04/03/1990 | US4913749 Process for case-hardening rolling bearing elements of low-alloy nickeliferous steel |
| 03/29/1990 | DE3931195A1 Bright annealing of steel strip coils - by adjusting inert gas flow rate to correspond to emulsion evaporation |
| 03/29/1990 | DE3931164A1 Surface hardening monitored for cracks - by fixture for hardening-quenching fitted with piezoelectric sensors |
| 03/28/1990 | EP0359756A1 Rotary hearth multi-chamber multi-purpose furnace system |
| 03/27/1990 | US4911763 Process for producing a low alloy white cast iron |
| 03/20/1990 | US4909732 Heat treating furnace |
| 03/20/1990 | CA1266790A1 Process for production of high-hardness, hardened and tempered special steel and special steel alloy |
| 03/15/1990 | DE3828597A1 Method of changing process parameters in pulse soldering |
| 03/14/1990 | EP0358362A1 Method for the manufacture of alloy railway rails |
| 03/14/1990 | EP0357898A2 Industrial furnace, in particular a chamber-type furnace for the heat treatment of metallic objects |
| 03/13/1990 | CA1266602A1 Method and apparatus for cooling steel strips |
| 03/08/1990 | DE3827267A1 Gassing apparatus for heat-treatment installations with protective- or reactive-gas operation |
| 03/07/1990 | EP0232346B1 Oven with movable beams |
| 03/07/1990 | EP0215032B1 Process and installation to permit the assembly line thermo-mechanical working, with little deformation of workpieces; also application of the process |
| 03/06/1990 | US4906184 Long life cover for heat chamber |
| 03/06/1990 | US4906182 Gas cooling system for processing furnace |
| 02/28/1990 | EP0355622A2 Method and apparatus for the surface pretreatment of a moulded single or multilayered material by electric corona discharge |
| 02/28/1990 | EP0355520A2 Method of heat treating workpieces |
| 02/27/1990 | US4904315 Method for improving magnesium oxide steel coatings using non-aqueous solvents |
| 02/27/1990 | US4904094 Carbonitrided carbon steel |
| 02/21/1990 | CN1039846A Quench medium containing magnesium chloride and compounding method |
| 02/20/1990 | US4902355 Method of and a spray for manufacturing a titanium alloy |
| 02/20/1990 | US4902354 High temperature electric arc furnace and method |
| 02/20/1990 | US4902342 Method for the manufacture of non-allergy creating precious metal objects |
| 02/14/1990 | EP0354389A1 Process for manufacturing sintered steel bodies, and bodies obtained thereby |
| 02/14/1990 | CN1039621A Thermal treatment for making two-phase steel with fine crystal grain |
| 02/13/1990 | US4900376 Hardening a cylindrical hollow object preferably made of steel |
| 02/13/1990 | US4900375 Magnesium-treated, decarburizingly-annealed cast iron material |
| 02/13/1990 | US4900248 Alloy reinforced with dispersed ceramic |
| 02/13/1990 | CA1265729A1 Simultaneous carburizing and boronizing of earth boring drill bits |
| 02/08/1990 | DE3908562A1 Method for thermal surface (superficial) hardening using energy beams |
| 02/08/1990 | DE3908561A1 Method for thermal surface modification using electron beams |
| 02/07/1990 | EP0353699A1 Method of heat-treating a high-alloy chromium steel |
| 02/06/1990 | US4899024 Method for treating large cast iron dies, particularly for vehicle-sheet metal pressing |
| 02/06/1990 | US4898627 Ultra-rapid annealing of nonoriented electrical steel |
| 02/06/1990 | US4898626 Pretreatment of cold rolling and decarbonization; improved core loss for stress relieving annealing |
| 02/06/1990 | CA1265420A1 Process for making internally hardened tubes |
| 02/06/1990 | CA1265419A1 Heat treatment with an autoregulating heater |
| 02/01/1990 | DE3925147A1 Hot isostatic pressing equipment interlocking safety device |
| 01/31/1990 | CN1039268A Fe-mn-al-c austenite containing nonmagnetic and low-temp. steels |
| 01/31/1990 | CN1039265A Method for producing roller chain with low-carbon low-alloy steel |
| 01/25/1990 | WO1990000630A1 Fe-Mn-Al-C ALLOYS AND THEIR TREATMENT |
| 01/25/1990 | DE3824415A1 Cooling hood for rapid cooling of red-hot material, in particular steel strip |
| 01/24/1990 | CN1039105A Roller for transpting steel metallurgical products moving in stove |
| 01/24/1990 | CN1039062A Process and apparatus for obtaining homogeneous austenite structure |
| 01/23/1990 | US4895605 Steel, heat treatment |
| 01/18/1990 | DE3909117C1 Induction hardening installation |
| 01/17/1990 | CN1038842A Reinforcement process of tool and die steel with steel tipped structure |
| 01/17/1990 | CN1038841A Deep cooling treatment and the chemical process of nickel-phosphorus-rare earth plating |
| 01/17/1990 | CN1038778A Automatic apparatus of forming and heat treatment of circular pieces |
| 01/16/1990 | US4894501 Method and apparatus for induction heating of gear teeth |
| 01/16/1990 | US4894099 Method for influencing the internal stress state of solid railroad wheels |
| 01/16/1990 | US4893789 Method and apparatus for hardening cam lobes on a camshaft |
| 01/10/1990 | EP0350146A1 Walking beam furnace insulation |
| 01/10/1990 | CN1038672A Treatment for inhibiting irradiation induced stress corrasion cracking in austenitic stainless steel |
| 01/04/1990 | DE3915729A1 Method and apparatus for the differential cooling of broad, flat products |
| 01/03/1990 | CN2050426U Manipulator type end-quench texting machine |
| 12/28/1989 | DE3920144A1 Orbital umgelagerte, monoatomare elemente, verfahrenzu ihrer herstellung und ihre weiterverarbeitung Orbital rearranged monoatomic, elements, verfahrenzu their production and their further processing |
| 12/27/1989 | EP0347699A1 Process and device for making a homogeneous austenitic structure |
| 12/20/1989 | EP0347409A1 Method of producing parts, subject to high stresses, with wear-resistant surfaces |
| 12/20/1989 | EP0347130A1 Treatment for inhibiting irradiation induced stress corrosion cracking in austenitic stainless steel |
| 12/20/1989 | CN1038128A Composite heat treatment technology of unity nodular cast iron parts by once heating and deeply and intensively toughening |
| 12/19/1989 | US4888066 Method for producing grain-oriented electrical steel sheet with very high magnetic flux density |
| 12/14/1989 | WO1989012208A1 Roller for the handling of metallurgical products moved inside a furnace |
| 12/14/1989 | WO1989012111A1 Heat-treatment process for metallic workpieces |
| 12/12/1989 | US4886558 Controlled cooling |