| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 12/07/1989 | DE3908631A1 Method for surface treatment (finishing) by fusion using electron beams |
| 12/07/1989 | DE3908630A1 Method for surface modification by means of electron beams |
| 12/07/1989 | DE3818878A1 Process for hardening a cylindrical hollow steel body |
| 12/07/1989 | DE3818679A1 Device for hardening the surface of workpieces |
| 12/06/1989 | EP0345205A1 Method for tempering a hollow cylindrical steel product |
| 12/06/1989 | EP0345147A1 Roll for handling siderurgical products transported inside a furnace |
| 12/06/1989 | EP0344413A1 Furnace for the heat treatment of iron and steel parts |
| 12/05/1989 | US4885043 Method for selective decarburization of iron based material |
| 12/05/1989 | US4884820 Wear resistant, abrasive laser-engraved ceramic or metallic carbide surfaces for rotary labyrinth seal members |
| 12/05/1989 | CA1263529A1 Apparatus for thermal deburring of parts |
| 11/30/1989 | WO1989011363A1 Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process |
| 11/30/1989 | DE3908629A1 Method for producing hardened tracks on workpieces by means of an electron beam |
| 11/29/1989 | EP0343242A1 Method of restoration of worn side surfaces of bushing-type parts |
| 11/29/1989 | CN1037546A Dry removing method of salt and oil after salt-bath quenching |
| 11/23/1989 | EP0343103A1 Method and apparatus for cooling an object |
| 11/23/1989 | EP0343008A2 Heat treatment of corrosion resistant steels |
| 11/23/1989 | DE3906217C1 Rod- or ring-shaped workpiece-adapted receiving device for rotationally symmetrical workpieces |
| 11/23/1989 | DE3817237A1 Method and pressure-cooling aggregate for cooling passing-through hot production material of steel and other materials, by controlling the heat absorption via continuously adjustable pressure-water orifice plates |
| 11/22/1989 | CN1037362A Method for eliminating metallic residual stress corrosion |
| 11/21/1989 | US4882468 Four electrique notamment pour traitement thermique |
| 11/21/1989 | US4881989 Fe-base soft magnetic alloy and method of producing same |
| 11/21/1989 | US4881987 Process for direct softening heat treatment of rolled wire rods |
| 11/15/1989 | CN2047668U Universal crawler-type resistance heater |
| 11/14/1989 | US4880477 Process of making an austempered ductile iron article |
| 11/14/1989 | US4880461 Super hard high-speed tool steel |
| 11/14/1989 | US4879793 Method of manufacturing turbine wheel disks with locally high internal compressive strains in the hub bore |
| 11/08/1989 | EP0341146A1 Automatic apparatus for the shaping and heat treatment of circular work pieces |
| 11/07/1989 | US4878962 Treatment for inhibiting irradiation induced stress corrosion cracking in austenitic stainless steel |
| 11/07/1989 | CA1262671A1 Method of cooling a moving metal product |
| 11/07/1989 | CA1262670A1 Method and apparatus for manufacturing rails |
| 11/02/1989 | EP0339703A1 Prevention of lead entrainment |
| 11/02/1989 | EP0339152A1 Heat treatment process for bushing used in track of endless track tractor |
| 11/01/1989 | CN2046892U High-frequency quenching inductor for paper cutting blade and plowshare |
| 10/31/1989 | US4877464 Rapid magnetic annealing of amorphous metal in molten tin |
| 10/31/1989 | US4877463 Method for producing rolled steel products, particularly threaded steel tension members |
| 10/31/1989 | CA1262523A1 Method of quenching |
| 10/24/1989 | US4875947 Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property |
| 10/18/1989 | EP0337008A2 Method and apparatus for controlling flow bias in a multiple zone process |
| 10/18/1989 | CN1036396A Oxidation preventive coating for heating the blank plates of silicon steels |
| 10/17/1989 | US4874437 Induction tempering |
| 10/11/1989 | CN2045739U Cam spindle quenching machine tool |
| 10/10/1989 | US4872926 Process for heat treating metals or metal alloys in a thermal plasma |
| 10/10/1989 | US4872923 Changing microstructure by controlled heating, cooling, stretching during elongation |
| 10/05/1989 | DE3809516A1 Method for supplying inert gas and reaction gas to a vertical or horizontal annealing unit |
| 10/04/1989 | EP0334920A1 Process for hot quenching of alloyed steel objects |
| 10/04/1989 | EP0277143A4 Shallow case hardening and corrosion inhibition process. |
| 10/04/1989 | CN1036040A Production of controllable atmosphere of nitrogen contg. co |
| 10/03/1989 | US4871624 Multilayer; magnetic base fused to thin metallic film |
| 10/03/1989 | US4871403 Method for producing electrical steel core laminations |
| 10/03/1989 | US4871402 Separating-agent composition and method using same |
| 09/27/1989 | EP0334803A1 Process for cooling hollow products |
| 09/27/1989 | EP0334224A2 Ultra-rapid annealing of nonoriented electrical steel |
| 09/27/1989 | EP0334223A2 Ultra-rapid heat treatment of grain oriented electrical steel |
| 09/26/1989 | US4869470 Vacuum furnace for heat treatment of metallic workpieces |
| 09/26/1989 | CA1261136A1 Corrosion inhibiting quenchant compositions |
| 09/26/1989 | CA1260258A1 Apparatus for cooling a metal product in motion |
| 09/21/1989 | DE3843285A1 Verfahren zur schadlosen entsorgung toxischer haertereialtsalze Procedures for the safe disposal of toxic haertereialtsalze |
| 09/19/1989 | US4867810 Method and apparatus for hardening cam lobes on a camshaft |
| 09/19/1989 | US4867808 Heat treating a metallic workpiece by quenching under cooling gas under above atmospheric pressure and specified circulation rate |
| 09/14/1989 | DE3906095A1 Method for hardening metallic workpieces |
| 09/13/1989 | EP0332041A2 Processing grain oriented electrical steel |
| 09/13/1989 | EP0331929A1 Method for producing a protective atmosphere for heat treating ferrous and non-ferrous metals |
| 09/12/1989 | US4865657 Annealing in two stages, at different temperature, under vacuum and under hydrogen, to promote order-disorder reaction |
| 09/05/1989 | US4863533 Apex seal for rotary piston engine and method for manufacturing the same |
| 09/05/1989 | CA1259050A1 Method and apparatus for the continuous annealing of steel strips |
| 09/05/1989 | CA1258971A1 Method and apparatus for continuously annealing metal strip and hearth roll therefor |
| 08/31/1989 | DE3805473A1 Process and equipment for hardening wire rings |
| 08/30/1989 | EP0329787A1 Method and device for laser processing of an object |
| 08/30/1989 | CN2043620U Stepless speed-regulating face hardening machine tool |
| 08/29/1989 | US4861394 Controlled slow cooling of steel tubulars |
| 08/29/1989 | US4861000 Installation having several elements for heat treatments |
| 08/23/1989 | EP0329611A1 Process for continuously coating a filamentary steel article by immersing the article in a bath of the molten coating metal |
| 08/23/1989 | EP0329604A1 Process and device for hardening similar elements fixed to a common support in a regularly spaced manner |
| 08/23/1989 | EP0329378A2 Vacuum heat treating furnace |
| 08/23/1989 | EP0328603A1 Control of straightness in scanning induction hardening of steel |
| 08/22/1989 | US4859175 Apparatus and process for optimizing combustion in chamber-type furnaces for baking carbonaceous blocks |
| 08/22/1989 | CA1258609A1 Shallow case hardening process |
| 08/22/1989 | CA1258560A1 Method of searing an engagement surface of a brake pad |
| 08/16/1989 | EP0328505A1 Device for cooling metal rod or wire |
| 08/16/1989 | CN1034760A Anticracking coating material for parts with large section ratio and complex shape |
| 08/15/1989 | US4857704 Apparatus for thermal treatments of thin parts such as silicon wafers |
| 08/09/1989 | CN2042469U Quick start salt bath furnace |
| 08/08/1989 | US4854978 Heat treatment to volatilize high vapor pressure elements |
| 08/08/1989 | US4854976 With microstructure of ferrite, bainite, retained austenite; ductility, weldability, workability, light-weight; automobile bodies |
| 08/08/1989 | US4854863 Convective heat transfer within an industrial heat treating furnace |
| 08/08/1989 | US4854860 Convective heat transfer within an industrial heat treating furnace |
| 08/02/1989 | EP0326371A1 Skid rail |
| 08/02/1989 | CN2042080U Hydraulic atomizing nozzle |
| 07/26/1989 | CN1034226A Surface hardening process of nitrogen plasma-arc |
| 07/25/1989 | US4851637 Method for processing large cast iron dies, particularly for vehicle sheet-metal pressing, and the apparatus for its implementation |
| 07/25/1989 | US4851054 Method of producing rolled steel having excellent resistance to sulfide stress corrosion cracking |
| 07/25/1989 | US4850576 Heat treatment of materials |
| 07/19/1989 | EP0324727A1 Control process of the humidity of the atmosphere of a thermal treatment furnace, and installation therefor |
| 07/19/1989 | EP0324721A2 Method for induction-hardening machine components |
| 07/19/1989 | EP0324294A1 Process for heat treating metals or metal alloys in a thermal plasma flame |
| 07/19/1989 | EP0324183A1 One piece support with several levels for the thermal treatment of shafts or axles |
| 07/18/1989 | US4848753 Apparatus for the inner and outer quenching of tubular pieces |
| 07/18/1989 | US4848752 Apparatus for the inside and outside quenching of tubular pieces |
| 07/13/1989 | WO1989006470A1 Adaptive method and device for coding and decoding a series of images by transformation |
| 07/12/1989 | CN1033841A Process for heat treatment of metallic workpieces |