| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 02/12/1991 | CA1280176C Method and apparatus for hardening axially spaced cams on a camshaft |
| 02/12/1991 | CA1280056C Method for heat-treatment of a strip |
| 02/07/1991 | WO1991001386A1 Process for hardening the cutting edges of saws, knives and cutting tools |
| 02/07/1991 | WO1991001385A1 Method of producing high-strength stainless steel strip having duplex structure and excellent spring characteristics |
| 02/07/1991 | CA2064032A1 Process for hardening the cutting edges of saws, knives and cutting tools |
| 02/06/1991 | EP0411161A1 Method for thermal treatment of high-speed steel |
| 02/06/1991 | EP0410969A1 Improvements in scanning induction hardening |
| 02/06/1991 | CN1049032A Process for producing high strength stainless steel of duplex structure having excellent spring limit value |
| 02/06/1991 | CN1049030A Process for hardening cutting edges of saws, blades and punching dies |
| 01/30/1991 | EP0410521A1 Method and apparatus for manufacturing netting of steel wire |
| 01/30/1991 | EP0410501A1 Fluidized bed for quenching steel wire |
| 01/30/1991 | EP0410300A1 Method and apparatus for heat treating at least one metal wire by means of heat transfer plates |
| 01/30/1991 | EP0410294A1 Method and apparatus for annealing metal strips |
| 01/30/1991 | EP0410033A1 Process for manufacturing ferritic steel work pieces |
| 01/30/1991 | CN1048918A Heat treating stove by using waste heat of cupola furnace |
| 01/27/1991 | CA2022046A1 Process and apparatus for the beat treatment of at least one metal wire with heat transfer plates |
| 01/27/1991 | CA2022042A1 Process and apparatus for the heat treatment of metal strip shuts |
| 01/27/1991 | CA2021383A1 Fluidized bed for quenching steel wires |
| 01/24/1991 | WO1991000929A1 Process for case-hardening roller bearing components of low-alloy nickel steel |
| 01/23/1991 | EP0409389A2 Method and apparatus for refining the domain structure of electrical steels by local hot deformation and product thereof |
| 01/23/1991 | CN2069862U Resistance-heated hydraulic tempering machine tool |
| 01/22/1991 | US4987281 Apparatus for continuous-direct-resistance heating of long-length particles |
| 01/22/1991 | US4986857 Hot working and heat treatment of corrosion resistant steels |
| 01/20/1991 | CA2020160A1 Method and apparatus for refining the domain structure of electrical steels by local hot deformation and product thereof |
| 01/16/1991 | EP0407660A1 Induction heating apparatus |
| 01/15/1991 | US4985090 Non-ageing low-alloy hot-rolled strip-form formable steel |
| 01/15/1991 | US4984770 Apparatus for partial tempering of rolled wire products made of steel |
| 01/15/1991 | CA1278985C Grain-oriented silicon steel and stress coating therefor |
| 01/15/1991 | CA1278917C Support device for moving metal strip |
| 01/10/1991 | WO1991000368A1 Method and device for continuously cooling a drawn steel wire |
| 01/09/1991 | EP0407254A1 Process for thermal treating of metals |
| 01/09/1991 | EP0406619A1 Process for producing galvanized, non-aging cold rolled steel sheets having good formability in a continuous galvanizing line |
| 01/09/1991 | EP0406249A1 Installation for manufacturing hot-rolled steel strip. |
| 01/09/1991 | CN1011121B Cold rolled steel sheets having improved press formability |
| 01/08/1991 | US4983227 Cooling, pearlitization, heat exchanging |
| 01/08/1991 | US4982936 Furnace |
| 01/08/1991 | US4982934 Reheating, holding and accumulation furnace for steelworks products |
| 01/03/1991 | DE4015248A1 Mfg. coil-break-free hot rolled strip |
| 01/02/1991 | EP0405092A1 Process for annealing thin steel sheet |
| 01/02/1991 | EP0404898A1 Device for hardening the surfaces of workpieces of different lengths. |
| 01/02/1991 | CN2068511U Far-infrared furnace used for heat treatment |
| 01/02/1991 | CA1278443C Heat retaining means |
| 01/01/1991 | US4981531 Process for producing cold rolled steel sheets having excellent press formability and ageing property |
| 12/27/1990 | WO1990015885A1 Steel material cooling control method |
| 12/27/1990 | EP0404431A2 Annealing unit insertion and removal system |
| 12/27/1990 | EP0404430A2 Modular annealing apparatus for in situ reactor vessel annealing and related method of assembly |
| 12/27/1990 | EP0404313A2 Electric resistance heater unit assembly |
| 12/27/1990 | EP0403747A2 Heating equipment installation system and method |
| 12/27/1990 | EP0403564A1 Method of producing case-hardened plate armor |
| 12/25/1990 | US4979996 Low temerpature heating, nitriding runnign strip |
| 12/20/1990 | DE3934474A1 Increasing capacity of box annealing furnaces for coiled products - involves introducing scavenging gas during cooling phase to reduce cooling time and prevent oxidation of product surface |
| 12/20/1990 | DE3919536A1 Cardboard cutting tool - is hardened by HF in chamber filled with protective gas |
| 12/20/1990 | DE3919199A1 Verfahren zur herstellung von waelzlagerelementen A process for preparing waelzlagerelementen |
| 12/18/1990 | US4978109 Unitary construction multideck tray device for heat treatment of shafts or like members |
| 12/13/1990 | WO1990015297A1 Forge tunnel-furnace with unit load chain conveyor |
| 12/12/1990 | EP0401726A1 Process for increasing the strength of heat-treatable steel and use of the steel obtained therefrom |
| 12/12/1990 | CN1010752B Steel sheets for painting and method of producing the same |
| 12/11/1990 | CA1277478C Process and installation for continuously manufacturing structurally controlled spheroidal graphite cast iron pipes |
| 12/05/1990 | EP0401172A1 A heating mantle with a porous radiation wall |
| 12/05/1990 | EP0401098A1 Hot rolled magnetic steel sheet |
| 12/05/1990 | EP0400348A1 Temperature-maintaining furnace for metallurgic products |
| 12/05/1990 | CN1010696B Continuoue annealing furnace for metallic strip |
| 12/04/1990 | US4975128 Method for heat-treating straight bead welded pipes |
| 12/04/1990 | US4975127 Method of producing grain oriented silicon steel sheets having magnetic properties |
| 12/04/1990 | CA1277158C Steel foil excellent in shielding characteristics to electromagnetic waves |
| 11/29/1990 | WO1990014743A1 Apparatus for and method of induction-hardening machine components |
| 11/29/1990 | DE3916684A1 Re-melting surface hardening process esp. for cam shaft or drag lever - has central and border regions heated at different times or using geometrical displacement to minimise surface deformation |
| 11/28/1990 | EP0399246A1 Process for increasing the creep rupture strength of crankshafts for piston engines, especially for internal-combustion engines |
| 11/28/1990 | CN1010560B Rolling of base steel sheet to be surfacetreated without producing stretcher strain markings |
| 11/27/1990 | US4973368 Method of manufacturing steel elements designed to withstand high stress, such as roller bearing elements |
| 11/27/1990 | CA1276986C Inductive edge heater |
| 11/20/1990 | US4971634 Method of carburizing spheroidizing and quenching |
| 11/18/1990 | WO1990014742A1 Induction furnace for heating and temperature homogenization in hot-rolling of thin steel strips |
| 11/18/1990 | CA2033072A1 Induction furnace for heating and temperature homogenization in hot-rolling of thin steel strips |
| 11/15/1990 | WO1990013672A1 Process for manufacturing coil-break-free hot strip and age-resistant hot-galvanized cold strip |
| 11/15/1990 | DE4001144C1 Case hardening of metallic workpiece - by rotating and locally heating above transformation temp. by energy beam |
| 11/14/1990 | CN2065621U Universal tyre heating furnace |
| 11/13/1990 | US4969957 Method of producing a mechanical component with superior fatigue strength |
| 11/13/1990 | CA1276244C Induction heating apparatus |
| 11/11/1990 | WO1990013674A1 Avoiding lead drag-out during patenting |
| 11/11/1990 | CA2050294A1 Avoiding lead drag-out during patenting |
| 11/07/1990 | CN1046764A Smog inhibitor for liquid lead and zinc |
| 11/06/1990 | US4968866 Closed loop induction type electrical wire preheater |
| 11/06/1990 | US4968359 Stress relief of metals |
| 10/31/1990 | EP0395191A1 Method of and device for cooling a long cylindrical body |
| 10/31/1990 | EP0394754A2 Process and device for the selective heat treatment of the weld seam region of a longitudinally welded pipe |
| 10/30/1990 | US4966632 Process for the annealing treatment of metal strips |
| 10/30/1990 | US4966348 Method and apparatus for monitoring atmosphere in furnaces |
| 10/24/1990 | CN1046353A Process of heat treatment technology for gear steel |
| 10/23/1990 | US4964621 Used to reinorce article of pneumatic tires |
| 10/23/1990 | US4964195 Metallic card clothing |
| 10/18/1990 | WO1990012266A1 Vacuum furnace |
| 10/17/1990 | EP0392889A1 A heating furnace |
| 10/17/1990 | CN1046196A Quick thermal treatment process of tooth palm of drill toothed wheel |
| 10/16/1990 | CA1275154C Cold rolled steel sheets having an improved press formability |
| 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 | EP0391007A1 Intermediate member for connecting a part made from manganese steel to a part made from carbon steel, process for connecting these materials using this intermediate member and assembly obtained by this process |
| 10/10/1990 | CN2063618U Box electric resistance furnace |