| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 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 |
| 01/11/1990 | WO1990000100A1 Process and installation for manufacturing a metal strip having a thickness less than or equal to 10 mm |
| 01/10/1990 | EP0350173A1 Method and apparatus for continuous annealing |
| 01/10/1990 | CN2050958U High efficiency radiation infrared resistance furnace |
| 01/04/1990 | DE3920951A1 Annealing grate |
| 01/03/1990 | EP0349299A1 A method and apparatus for heating a metallic elongated product |
| 01/03/1990 | CN2050576U Full carbofrax energy-saving heat-treating box type resistance furnace |
| 01/02/1990 | US4891008 High temperature convection furnace |
| 01/02/1990 | US4890820 Heating apparatus for a metallic strand |
| 01/02/1990 | US4890819 Machine for heat treating camshafts |
| 01/02/1990 | US4890785 Preventive method for plate deformation due to welding in flat plate welded structure |
| 12/27/1989 | EP0347699A1 Process and device for making a homogeneous austenitic structure |
| 12/27/1989 | EP0347662A2 Strip steel casting installation with a rotating hearth furnace |
| 12/27/1989 | EP0347568A2 Method of making wear-resisting castings |
| 12/27/1989 | EP0347512A1 A bimetal construction roll for reducing and finishing stands in a rolling mill train |
| 12/27/1989 | CN2050043U Heat treatment electric furnace |
| 12/20/1989 | EP0346547A1 Method for processing cold-rolled stainless-steel sheet and strip |
| 12/19/1989 | US4888066 Method for producing grain-oriented electrical steel sheet with very high magnetic flux density |
| 12/19/1989 | US4888065 Method of making roller bearing element and product therefrom |
| 12/19/1989 | CA1263933A1 Pack carburizing process for earth boring drill bits |
| 12/13/1989 | EP0345936A1 Method of refining magnetic domains of electrical steels |
| 12/13/1989 | CN2049337U Composition electric resistance furnace |
| 12/12/1989 | US4886710 Hardness, machinability |
| 12/12/1989 | US4886558 Controlled cooling |
| 12/12/1989 | US4885831 Method for forming a contour hardened gear |
| 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 | EP0345206A1 Method of producing thick plate |
| 12/06/1989 | EP0345205A1 Method for tempering a hollow cylindrical steel product |
| 12/06/1989 | EP0345103A1 Process and installation for in-line homogenizing and recrystallization of continuously cast metallic products |
| 12/05/1989 | US4885041 Hot rolling slab from casting machine, cooling, more rolling, coiling |
| 12/05/1989 | US4884967 Steel reheating furnace |
| 11/29/1989 | EP0343242A1 Method of restoration of worn side surfaces of bushing-type parts |
| 11/28/1989 | US4883946 Heating apparatus, particularly for the heat treatment of a tube of small diameter and of curved shape |
| 11/28/1989 | CA1263294A1 Heat treated high strength bimetallic cylinder |
| 11/28/1989 | CA1263259A1 High strength bolt and method of manufacturing same |
| 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 | DE3840905C1 Use of a steel alloy for camshafts |
| 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 |
| 11/21/1989 | US4881987 Process for direct softening heat treatment of rolled wire rods |
| 11/16/1989 | WO1989010806A1 A method and apparatus for correcting deviations in the shape of hardened metal objects |
| 11/15/1989 | CN2047769U Walking beam electric furnace for heating short plate spring |
| 11/15/1989 | CN2047668U Universal crawler-type resistance heater |
| 11/14/1989 | US4880477 Process of making an austempered ductile iron article |
| 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 |
| 11/08/1989 | EP0340939A1 Cooling workpieces being manufactured by shape melting |
| 11/07/1989 | USH709 Heater system for curing rocket motor materials |
| 11/07/1989 | US4879448 Apparatus for laser welding and annealing |
| 11/07/1989 | US4878961 Method and system for controlling tension to be exerted on metal strip in continuous annealing furnace |
| 11/07/1989 | US4878960 Process for preparing alloyed-zinc-plated titanium-killed steel sheet having excellent deep-drawability |
| 11/07/1989 | CA1262670A1 Method and apparatus for manufacturing rails |
| 11/02/1989 | EP0339703A1 Prevention of lead entrainment |
| 11/02/1989 | EP0339474A1 Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics |
| 11/02/1989 | EP0339152A1 Heat treatment process for bushing used in track of endless track tractor |
| 11/02/1989 | DE3825912C1 Process for producing metallic projectile shells which form fragments |
| 11/01/1989 | CN2046994U Movable leakage-bottom electric furnace |
| 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 | US4877462 Oil tempering, descaling, phosphate treatment, cold working |
| 10/25/1989 | EP0338038A1 Process and means for making metal inking rolls |
| 10/25/1989 | CN1036518A Electric heating arrangement |
| 10/12/1989 | DE3809786A1 Method for the removal of rolling defects in the rolling of tool steels of high Brinell hardness |
| 10/11/1989 | EP0336161A1 Method for improving the fatigue strength of welded high strength steels |
| 10/11/1989 | EP0336130A1 Method and apparatus for the positioning of slabs |
| 10/11/1989 | EP0336090A1 Bainitic core grinding rod |
| 10/11/1989 | CN2045739U Cam spindle quenching machine tool |
| 10/05/1989 | DE3908653A1 Process for improving the fatigue strength of welded high-strength steels |
| 10/05/1989 | DE3810104A1 Device for eliminating the spring pretensioning of the front springs of motor vehicles so that the front springs can be removed without risk |
| 10/05/1989 | DE3809516A1 Method for supplying inert gas and reaction gas to a vertical or horizontal annealing unit |
| 10/04/1989 | EP0335434A1 Reheating, holding and accumulation furnace for steelworks products |
| 10/04/1989 | CN1036043A Alloy composition and method of forming drive axle shafts |
| 10/04/1989 | CN1036042A Heat treatment equipment and quenching technology for rails |
| 10/04/1989 | CN1035982A Process and means for making metal inking rolls, particularly for flexographic printing, and rolls obtained with such process and means |
| 10/03/1989 | US4871403 Method for producing electrical steel core laminations |
| 10/03/1989 | US4871146 Apparatus for heat treatment of steel rods |
| 10/03/1989 | US4870850 Method and device for leveling metal strip to be fed into continuous annealing furnace |
| 10/03/1989 | CA1262043A1 Processing steel slabs |
| 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 |
| 09/27/1989 | EP0334222A1 Permanent domain refinement by aluminum deposition |
| 09/27/1989 | EP0334200A1 Process for heating elongated stock |
| 09/26/1989 | US4869089 Coil box apparatus |
| 09/26/1989 | CA1260551A1 Thermoplastic method of reducing the diameter of a metal tube |
| 09/26/1989 | CA1260292A1 Cobalt-base superalloy and cast and welded industrial gas turbine components thereof |
| 09/21/1989 | WO1989008512A1 Installation for manufacturing hot-rolled steel strip |
| 09/21/1989 | DE3808388A1 Method and device for influencing the properties of electromagnetic relays, especially hinged-armature relays for motor vehicles |
| 09/21/1989 | DE3808258A1 Continuous weld-annealing process |
| 09/20/1989 | EP0332745A1 Manufacturing method for the casing of an explosive charge |
| 09/20/1989 | CN1035634A Method for manufacturing piston |
| 09/19/1989 | US4867810 Method and apparatus for hardening cam lobes on a camshaft |
| 09/19/1989 | US4867807 Fine grain |
| 09/19/1989 | US4867015 Carburizing, heat treatment to increase hardness |
| 09/19/1989 | CA1259552A1 Method of and apparatus for heat-treating rails |
| 09/14/1989 | DE3906095A1 Method for hardening metallic workpieces |
| 09/13/1989 | EP0332284A1 Low grade material axle shaft |