| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 09/08/1998 | US5803993 Outer ring for high strength constant velocity joint and production process for same |
| 09/08/1998 | US5803991 High chromium content by diffusion; heat treatment in a plurality of heat cycles to achieve uniform chromium content in the thickness direction |
| 09/03/1998 | WO1998038346A1 Method and installation for tempering metallic strips |
| 09/03/1998 | WO1998038344A1 Heating method and heating apparatus |
| 09/03/1998 | DE19706833A1 Producing cylinder running surfaces in piston machinery |
| 09/02/1998 | EP0862033A1 Device for the replacement of a band support roller in a heating furnace |
| 09/02/1998 | EP0861907A2 Process for producing a bearing component |
| 09/02/1998 | EP0776380A4 Surface treated iron bearing element |
| 09/02/1998 | CN2289799Y Drilling rod welding region liquid cooling device |
| 09/02/1998 | CN1192171A Method and device for operating a continuous casting plant |
| 09/01/1998 | US5800774 Heat treating furnace and method |
| 09/01/1998 | US5800641 Method of thermal or thermochemical treatment of precision steel components |
| 09/01/1998 | US5800637 Steel alloy of carbon, chromium, vanadium, molybdenum and iron |
| 09/01/1998 | US5800161 Heating and/or temperature-maintaining furnace for slabs |
| 09/01/1998 | US5799683 Poppet valve and method of manufacturing it |
| 09/01/1998 | US5799398 Method for precision gear finishing by controlled deformation |
| 08/26/1998 | EP0752012B1 Process for producing magnetic steel sheets with a glass coating |
| 08/26/1998 | CN1191241A Bell tempering furnace |
| 08/25/1998 | US5798007 Process and apparatus for the continuous heat treatment of a metal strip travelling in a different atmosphere |
| 08/25/1998 | CA2106616C Shape steel material having high strength, high toughness and excellent fire resistance and process for producing rolled shape steel of said material |
| 08/19/1998 | EP0858860A1 Process for manufacturing welding wire |
| 08/19/1998 | CN2288184Y Medium-frequency induction heater for changed section steel rail |
| 08/19/1998 | CN2288183Y Steel-pushing type continuous heating furnace |
| 08/19/1998 | CN1190918A Gear shot peening method and gear |
| 08/19/1998 | CN1190675A Air flow controller |
| 08/19/1998 | CN1039544C Alloy sheet and making method thereof |
| 08/18/1998 | US5796078 Method for the inductive surface hardening of workpieces |
| 08/13/1998 | WO1998035066A1 Method for hardening camshafts and linear inductor for the implementation of said method |
| 08/13/1998 | DE19709929C1 Hüllrohr eines Brennstabs für ein Siedewasserreaktor-Brennelement und Verfahren zu seiner Herstellung Cladding tube of a fuel rod for a boiling water reactor fuel element and process for its preparation |
| 08/13/1998 | CA2280501A1 Method for hardening camshafts and linear inductor for the implementation of said method |
| 08/12/1998 | EP0857933A1 Slab transport tire roller and method of producing same |
| 08/12/1998 | EP0857794A1 Cold rolled steel sheet and manufacturing process |
| 08/12/1998 | EP0857523A1 Method and means of temperature control |
| 08/12/1998 | EP0660883B1 Improved beta-quenching process for nuclear fuel cladding |
| 08/12/1998 | CN1190441A Cast iron and piston ring |
| 08/12/1998 | CN1190157A Variable displacement compressor, swash plate, and method for hardening swash plate |
| 08/11/1998 | US5791656 Seal assembly for heat treatment furnaces using an atmospheric gas containing hydrogen gas |
| 08/06/1998 | WO1998033946A1 Top hat furnace |
| 08/06/1998 | DE19803259A1 Bell furnace, especially for bright annealing steel strip coils |
| 08/05/1998 | EP0856588A2 Heat treating furnace for a continuously supplied metal strip |
| 08/05/1998 | CN1189858A Low-alloy heat-treated pearlitic steel rails with excellent wear resistance and welding characteristics and process for prodn. thereof |
| 08/05/1998 | CN1189789A Method and plant for the manufacture of a strip of formable steel |
| 08/04/1998 | US5788483 Furnace for coils |
| 08/04/1998 | US5788034 Lockup clutch for a torque converter and method of thermally treating a lockup clutch piston |
| 07/29/1998 | CN1189111A Seamless steel pipe manufacturing method and equipment |
| 07/28/1998 | US5785773 Coating cold strip during holding time with thin surface film by oxidation by adding carbon dioxide to protective gas containing hydrogen and nitrogen |
| 07/28/1998 | US5785772 Method and apparatus for controlling galvanneal induction furnace operation |
| 07/28/1998 | US5784803 Oil removing method for a pipe coil |
| 07/23/1998 | WO1998031843A1 Method for making seamless tubing with a stable elastic limit at high application temperatures |
| 07/22/1998 | EP0853989A2 Method and device for winding steel bar |
| 07/21/1998 | US5783141 Annular furnace |
| 07/21/1998 | US5783001 Exposure to vacuum to remove volatile surface contaminants |
| 07/21/1998 | US5783000 Method for heat treatment of steel, and products of steel |
| 07/21/1998 | US5782999 Containing carbon, manganese, aluminum, nitrogen and niobium;excellent strength; automatic laundering machines |
| 07/21/1998 | CA2006384C Induction heating apparatus |
| 07/16/1998 | CA2195284A1 Valve assembly |
| 07/15/1998 | CN2286187Y Non-water-cooling gravity discharging apparatus for heating furnace |
| 07/15/1998 | CN2286087Y Multi-function rocker arm type laser processing machine |
| 07/15/1998 | CN1039134C Walking-beam furnace for accelerated heating of billets or like |
| 07/14/1998 | US5778716 Coiler furnace for a hot strip |
| 07/08/1998 | CN1186865A Die and quenching method of the same |
| 07/07/1998 | US5775122 Method of and apparatus for cooling hot-rolled structural shapes |
| 07/02/1998 | WO1998028453A1 Process for the treatment of grain oriented silicon steel |
| 07/02/1998 | WO1998028452A1 Process for the production of oriented-grain electrical steel sheet with high magnetic characteristics |
| 07/02/1998 | WO1998028451A1 Process for the production of grain oriented silicon steel sheet |
| 07/02/1998 | WO1998028450A1 High strength deep drawing steel developed by reaction with ammonia |
| 07/02/1998 | DE19758138A1 Wear resistant metal component production |
| 07/02/1998 | DE19757359A1 Carbon steel for hot forged connecting rod |
| 07/02/1998 | CA2250742A1 High strength deep drawing steel developed by reaction with ammonia |
| 07/01/1998 | EP0851195A1 Tire roller for transporting slabs |
| 07/01/1998 | EP0851039A1 Stainless steel wire and process for production |
| 07/01/1998 | EP0850719A1 Welding method and welding material |
| 07/01/1998 | CN1186122A Production of cutting edges for chemical fibers |
| 06/30/1998 | US5772957 High strength steel composition having enhanced low temperature toughness |
| 06/30/1998 | US5772795 Nitriding in annealing furnace; strengthening |
| 06/30/1998 | US5772567 Composite furnace rolls |
| 06/30/1998 | US5771731 Hot strip production plant for ferritic rolling and method of producing ferritic rolled strip |
| 06/30/1998 | CA2116504C Process for manufacturing high-strength bainitic steel rails with excellent rolling-contact fatigue resistance |
| 06/25/1998 | WO1998027235A1 Method for stretching of a profile in an induction heat treatment process |
| 06/25/1998 | WO1998027234A2 Helical spring with high volumetric efficiency and method for the production thereof |
| 06/25/1998 | DE19704438C1 Induction hardening of camshaft |
| 06/24/1998 | EP0849434A2 Heat resisting steam turbine rotor |
| 06/24/1998 | EP0849369A2 Process for heat treatment of steel wire or bar winding onto coils |
| 06/24/1998 | EP0849368A1 Shaped rolled product and method of making the same |
| 06/24/1998 | EP0849367A1 Installation for hardening metallic articles |
| 06/24/1998 | CN1185814A Preparation of pre-coated aluminium alloy articles |
| 06/24/1998 | CN1185359A Formed rolled piece and mfg. method thereof |
| 06/23/1998 | US5770838 Induction heaters to improve transitions in continuous heating system, and method |
| 06/23/1998 | US5770832 Method for determining and controlling the cooling rate for metal alloys in an electrical resistance welding process |
| 06/23/1998 | US5770146 System for the heat treatment of metallic annealing material |
| 06/23/1998 | US5769973 Thermally conditioning the bainite state to a martensite state to remove memory of its original shape, stress tempering without restraining |
| 06/23/1998 | US5769629 Sealing apparatus for inlet/outlet of atmosphere heat treatment furnace |
| 06/23/1998 | CA2117481C Process and apparatus for applying and removing liquid coolant to control temperature of continuously moving metal strip |
| 06/18/1998 | DE19651408A1 Workpiece carrier for heat treatment of workpieces |
| 06/17/1998 | EP0848265A2 Improvements in or relating to micro mechanical devices |
| 06/17/1998 | CN1185182A Martensitic stainless steel having high mechanical strength and corrosion resistance and relative mfd. articles |
| 06/16/1998 | US5766382 Arranging pieces in charges in trays or baskets, introducing into furnace, transporting through furnace, between furnace and quenching cell, through cell, with controlled charge displacement to ensure stability of treatment |
| 06/16/1998 | US5766378 Stainless steel surface claddings of continuous caster rolls |
| 06/10/1998 | EP0846929A2 Part or jig for gas carburizing furnace |
| 06/10/1998 | EP0846780A2 A method of making a self-sharpening metallic cutting blade or a cultivator swep and a cutting blade or a cultivator sweep |