| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 03/15/1988 | CA1233985A1 Vacuum heat treating furnace and quench system with drop transfer |
| 03/10/1988 | WO1988001715A1 An improved fluid barrier curtain system |
| 03/10/1988 | WO1988001652A1 Process for heat-treating rolled steel product |
| 03/08/1988 | CA1233734A1 Steel pipe hardening apparatus |
| 03/08/1988 | CA1233639A1 Furnace for heating up cylindrical charges |
| 03/02/1988 | EP0257787A1 Process for producing optically active benzene-sulfonamide derivates |
| 03/02/1988 | CN86202483U U-type electrode deep-well salt-bath furnace |
| 03/02/1988 | CN86104863A Nodular cast iron with biphase structure of ferrite and bainite |
| 03/01/1988 | US4728374 Solution heat treated engine poppet valves |
| 02/25/1988 | DE3722956C1 Process for roasting iron powder |
| 02/25/1988 | DE3628264A1 Process for the manufacture of components from steel of high strength with at the same time high toughness, which retain these properties even after hot-forming |
| 02/24/1988 | EP0256116A1 Method of heat treatment |
| 02/23/1988 | US4726857 Jig unit and method for heat treatment of vessel-like workpiece |
| 02/23/1988 | US4726855 Winding annealing coils around yokes of cores, flowing electric current to heat coils |
| 02/23/1988 | CA1233095A1 Process for producing grain-oriented electrical steel sheet having both improved magnetic properties and properties of glass film |
| 02/16/1988 | CA1232828A1 Quenching bath and quenching method for metals |
| 02/11/1988 | DE3622668C1 Fluidised bed kiln for the heat treatment of metallic objects |
| 02/09/1988 | US4724015 Method for improving the magnetic properties of Fe-based amorphous-alloy thin strip |
| 02/09/1988 | US4723909 Walking beam oven for advancing products at different speeds in different sections of the oven |
| 02/09/1988 | US4723562 Apparatus for cooling a moving metal product |
| 02/03/1988 | EP0254932A2 Heat treatment of rapidly quenched Fe-6.5 wt si ribbon |
| 02/03/1988 | CN86104349A Technology of surface hardening treatment by laser and the equipment |
| 02/03/1988 | CN85102501B Preparation and uses of protecting film on metal parts during heat treatment |
| 01/27/1988 | CN86104697A Heat treatment method for high strength bolts |
| 01/26/1988 | CA1231834A1 Car stabilizer and a manufacturing method therefor |
| 01/20/1988 | EP0253176A2 Method for heat treating steel work pieces |
| 01/19/1988 | US4720312 Process for producing surface remelted chilled layer camshaft |
| 01/19/1988 | US4720311 Camshaft lobe hardening method and apparatus |
| 01/19/1988 | US4720310 Process for effecting the controlled cooling of metal sheets |
| 01/19/1988 | CA1231631A1 High strength low carbon steels, steel articles thereof and method for manufacturing the steels |
| 01/13/1988 | EP0252895A2 Method and apparatus for producing high resistant rails |
| 01/13/1988 | EP0252856A1 Process and device to optimize the firing in an open chamber furnace for burning carbonaceous blocks |
| 01/13/1988 | CN86108867B Full-sealing device for feed end of atmospheric control bottom-vibrating furnace |
| 01/12/1988 | US4718952 Process for producing a remelted and chilled camshaft |
| 01/12/1988 | US4718950 With graphite |
| 01/07/1988 | DE3622302A1 Working method for heating semifinished products cast in continuous casting installations or formed in forming installations, for introduction into forming and/or further-processing installations |
| 01/07/1988 | DE3621814A1 Apparatus for the heat and surface treatment of metal parts |
| 01/06/1988 | CN87104218A Combustion apparatus and process for baking block carbon in chamber |
| 01/05/1988 | US4717433 Method of cooling a heated workpiece utilizing a fluidized bed |
| 01/05/1988 | US4717429 Process for the removal of alkali metal nitrite from nitrate containing salt baths |
| 12/31/1987 | CN87200996U Vacuum heat treatment pot used in an electric resistance furnace |
| 12/30/1987 | WO1987007938A1 Device and method for optimizing combustion in open chamber furnaces for firing carbon blocks |
| 12/30/1987 | WO1987007861A1 Device for removing barbs from parts by gas detonation |
| 12/29/1987 | US4715907 Method for heat treating ferrous parts |
| 12/29/1987 | US4715904 Method for producing a magnet with radial magnetic anisotropy |
| 12/29/1987 | CA1230933A1 Method and apparatus for laser gear hardening |
| 12/26/1987 | CN87201380U Revolving hardening bath |
| 12/23/1987 | EP0249888A2 Aluminothermic preformed body for heating rails and process of its manufacturing |
| 12/23/1987 | EP0149623B1 Polyoxazolines in aqueous quenchants |
| 12/22/1987 | US4714809 Method and apparatus for shaping the surfaces of cams on a camshaft |
| 12/22/1987 | US4714497 Process for the preparation of ferrous parts of a color television tube and furnace for operating such a process |
| 12/22/1987 | CA1230478A1 Apparatus for in situ annealing of a pressure vessel |
| 12/16/1987 | CN87100594A Method and system for cooling metal strip |
| 12/15/1987 | US4713124 Uniformly |
| 12/10/1987 | DE3619304A1 Method of tempering or hardening workpiece edges |
| 12/09/1987 | CN86209673U Heat-treatment furnace with non-oxidization heating box |
| 12/08/1987 | US4711431 Spray-cooling apparatus |
| 12/08/1987 | CA1229982A1 Billet heating furnace with adjustable pressurized entrance seal |
| 12/03/1987 | DE3617979A1 Method and device for reworking props and the like |
| 12/01/1987 | US4709904 Vacuum furnace for heat-treating a charge |
| 12/01/1987 | US4709570 Method for setting steel stock discharge temperature of heating furnace in hot rolling line |
| 11/26/1987 | DE3711451A1 Partially surface-hardened grooved roller, and surface-hardening process |
| 11/26/1987 | DE3711450A1 Partially surface-hardened grooved roller, and surface-hardening process |
| 11/25/1987 | EP0247021A2 Apparatus for the controlled thermal treatment of railroad-switch components |
| 11/24/1987 | US4708752 Process for laser hardening drilling bit cones having hard cutter inserts placed therein |
| 11/19/1987 | EP0245776A1 Flexible radiant tube-heater |
| 11/19/1987 | DE3631551C1 Process for avoiding black annealing edges in the annealing of steel strip |
| 11/19/1987 | DE3619712C1 Process for producing steel materials from multi-pass welding material |
| 11/11/1987 | EP0245194A2 A method and apparatus for the induction heat treatment of irregularly shaped workpieces |
| 11/10/1987 | US4705578 Method of constructing a magnetic core |
| 11/10/1987 | CA1229145A1 Method of controlling cooling of hot-rolled steel sheet and system therefor |
| 11/07/1987 | CN86206964U Heat treatment furnace with far infrared resistant metal strips |
| 11/04/1987 | EP0243578A1 Method of manufacturing a rolling bearing ring with a continuous split gap at at least one point of its periphery |
| 11/03/1987 | US4704167 Low speed and high speed |
| 11/03/1987 | CA1228788A1 Method of manufacturing grain-oriented silicon steel sheets |
| 10/28/1987 | EP0243340A1 Device for compensating skid marks on heated slabs |
| 10/27/1987 | US4702778 Hot rolling, then controlled cooling |
| 10/22/1987 | DE3623791C1 Method and apparatus for the heat treatment of hot-formed upper and lower straps |
| 10/21/1987 | EP0241582A2 Method for the manufacture of non-allergy creating precious metal objects. |
| 10/20/1987 | US4701589 Method and apparatus for heat treating coiled springs |
| 10/20/1987 | US4701584 Method and apparatus for the induction heat treatment of irregularly shaped workpieces |
| 10/08/1987 | WO1987005843A1 Installation for laser treatment of materials |
| 10/07/1987 | EP0239688A1 Annealing separator used in the finishing annealing step for producing a grain-oriented electrical steel sheet |
| 10/06/1987 | US4698130 Using pulsed pressure cycle and halide gas |
| 10/06/1987 | US4698103 Continuous annealing with rapid cooling; reduced fractures; flatness |
| 10/06/1987 | CA1227728A1 Method for improving the annealing separator coating on silicon steel and coating therefor |
| 09/30/1987 | EP0239295A2 Process for forming hard cutter insert bearing cones for rock bits |
| 09/29/1987 | US4696226 Fluid barrier curtain system |
| 09/29/1987 | US4696080 Metallic wire for spinning machinery and the method of manufacturing the same |
| 09/24/1987 | DE3609329A1 Apparatus for pushing on the last ingots through an ingot-heating plant |
| 09/23/1987 | CN86103933A Cool-controlling treatment and cooling device of hot-rolled steel tube |
| 09/23/1987 | CN86101552A Cyclic annealing technique for making low manganese dual-phase steel |
| 09/22/1987 | CA1227110A1 Pipe quenching apparatus and method |
| 09/16/1987 | EP0236666A2 Process for reheating semiproducts from continuous-casting installations or from shaping installations for their introduction into shaping and/or finishing installations |
| 09/16/1987 | EP0236521A1 Reflection type optical device |
| 09/16/1987 | EP0109436B1 Divorced eutectoid transformation process and product of ultrahigh carbon steels |
| 09/15/1987 | US4694131 Induction heating method and apparatus for relieving residual stress in welded joint between main and branch pipes |
| 09/15/1987 | US4693762 Isothermal heating |
| 09/11/1987 | WO1987005335A1 Shallow case hardening and corrosion inhibition process |
| 09/09/1987 | EP0236247A1 Metallic components of which at least one face presents at least one zone region resistant to wear |