| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 05/10/1994 | US5310432 Toothed wheel for use in automobiles and its manufacturing method |
| 05/04/1994 | EP0595451A1 A powder feed composition for forming a refractory oxide coating, a process used for producing the coating and the article so produced |
| 05/04/1994 | CN1086234A Powder feed composition for forming a refraction oxide coating, process used and article so produced |
| 05/03/1994 | US5308946 Induction heating apparatus and method for heating metal strips and slabs |
| 05/03/1994 | US5308286 Device for manufacturing austenitic stainless steel drill screws |
| 05/03/1994 | US5308046 For admitting elongate articles to a treatment chamber |
| 04/28/1994 | WO1994009171A1 Heavy-duty solid wheels and tyres for rail locomotives and trucks |
| 04/28/1994 | WO1994009164A1 Method for the thermal treatment of metal products |
| 04/28/1994 | DE4233916A1 Industrial heat treatment furnace - returns portion of recirculating gas into treatment zone through jets across main gas flow |
| 04/26/1994 | US5306897 Heat treatment method and apparatus for turbine blades using flexible heater sleeve |
| 04/26/1994 | US5306365 Reduces air entrapment in billet |
| 04/26/1994 | US5306361 Method for improving service life of rail welds by aluminothermic heat treatment |
| 04/26/1994 | US5306359 Method and apparatus for heat treating |
| 04/26/1994 | US5306356 Easy magnetization, magnetocrystalline anisotropic |
| 04/26/1994 | US5306354 Method of blackening treating a stainless steel strip surface |
| 04/26/1994 | US5305515 Method and arrangement for rolling hot wide strips from continuously cast thin slabs |
| 04/21/1994 | DE4332854A1 Ferritic steel for use as impulse wheel in ABS systems - which is free of titanium@ and niobium@ |
| 04/20/1994 | EP0593002A1 Method and device for rolling of hot wide strip of continuously cast thin stabs |
| 04/20/1994 | EP0593001A1 Method and device for making hot-rolled strips or beams from continuously cast material |
| 04/20/1994 | CN2162469Y Tempering heating arrangement for new hammer forging mould |
| 04/19/1994 | US5304777 Method of connecting a manganese steel part to another carbon steel part and assembly thus obtained |
| 04/19/1994 | US5304519 Powder feed composition for forming a refraction oxide coating, process used and article so produced |
| 04/19/1994 | US5303985 Cast one-piece axle housing |
| 04/19/1994 | CA1328648C Wear resistant rails capability of preventing propagation of unstable rupture |
| 04/14/1994 | WO1994008190A1 Method and apparatus for improving the performance of a heating furnace for metal slabs |
| 04/14/1994 | DE4334687A1 Furnace installation and method for heat treatment of metal components - with division walls and with three empty stations left between the stations loaded first and last |
| 04/14/1994 | DE4303686A1 Furnace installation for heat treatment of metal components - with ring-shaped furnaces and component receptacles rotatable through them |
| 04/14/1994 | DE4234285A1 Verfahren zur Wärmebehandlung von metallischem Gut A method of heat treatment of metallic materials |
| 04/14/1994 | DE4234192A1 Hoch belastbare Vollräder und Radreifen für Schienen-Triebfahrzeuge und Wagen Heavy-duty, solid wheels and tires for rail locomotives and wagons |
| 04/14/1994 | DE4233462A1 Improving the properties of martensitic steel wire - through further forming by cold-rolling processes |
| 04/14/1994 | CA2108239A1 Method of and apparatus for producing of hot rolled strips or profiles from a continuously cast primary material |
| 04/13/1994 | EP0592267A1 Steel for packaging purposes and its use for cans with closures of the easy-to-open type by tearing along a line of weakness |
| 04/13/1994 | EP0591151A1 A steel bar and billet heating system located upstream of shears for further processing. |
| 04/13/1994 | EP0506768B1 Steel wire having a structure of the cold-drawn lower bainite type; method for producing such wire |
| 04/13/1994 | CN1085258A Method for heat treatment of rail |
| 04/12/1994 | US5302216 Method for producing by continuous heat treatments oil-tempered steel wires for springs having high strength and high toughness |
| 04/12/1994 | US5302215 Method and apparatus for selectively heating a workpiece subjected to low temperature thermomechanical processing |
| 04/12/1994 | CA2027316C Process for preparing wound core having low core loss |
| 04/07/1994 | DE4313543C1 Method and appts. for heat treatment of continuously fed metal strips - with the edge regions of the strip receiving more heat per unit area than the central region |
| 04/06/1994 | CN1024141C Steel sheets for porcelain enameling and method of producing same |
| 04/06/1994 | CN1024120C Producing method for hand clothes cutting scissors |
| 04/05/1994 | US5299783 Rod cooling apparatus |
| 04/05/1994 | US5299441 Method of making a mandrel comprising a drill section for a self-drilling blind rivet |
| 03/31/1994 | WO1994006943A1 Process for changing the microstructure of metallic rails |
| 03/31/1994 | DE4232115A1 High-duty fastening element with uniform strength over entire length - has differential degrees of cold forming of the material over the length of the element |
| 03/30/1994 | EP0589530A1 Method of producing a rivated joint |
| 03/30/1994 | EP0589424A2 Shape steel material having high strength, high toughness and excellent fire resistance and process for producing rolled shape steel of said material |
| 03/30/1994 | EP0589128A1 Leaf spring constraining apparatus |
| 03/29/1994 | US5297338 Method of connecting metal ring gear to metal boss portion |
| 03/23/1994 | EP0588458A1 Method of nitriding austenitic stainless steel |
| 03/23/1994 | EP0587732A1 Apparatus for and method of induction-hardening machine components |
| 03/23/1994 | CN1084226A Method of nitriding austenitic stainless steel products |
| 03/22/1994 | US5295822 Convective heat transfer by cascading jet impingement in a batch coil annealling furnace |
| 03/22/1994 | US5295668 Metal tube oxidation treatment apparatus |
| 03/22/1994 | US5295417 Multistep finishing process for saw blade teeth and a saw finishing machine to carry out the process |
| 03/17/1994 | WO1994005824A1 Structural member and process for producing the same |
| 03/16/1994 | EP0587489A1 Method and device to produce a hardened twisted bar with holes |
| 03/16/1994 | EP0587150A1 Process for hot working continuous-cast bloom and steel ingot |
| 03/16/1994 | CN1083866A Silicate's aqueous solution quench treatment of grinding ball made of nodular cast iron |
| 03/16/1994 | CN1024025C Process for producing high strength stainless steel of duplex structure having excellent spring limit value |
| 03/15/1994 | US5294271 Heat treatment for manufacturing spring steel excellent in high-temperature relaxation resistance |
| 03/15/1994 | CA2048149C Continuous annealing line having carburizing/nitriding furnace |
| 03/15/1994 | CA1327815C Monobloc arrangement with tiered platform for heating treatment of shafts and axles |
| 03/09/1994 | EP0585843A2 High-formability steel plate with a great potential for strength enhancement by high-density energy treatment |
| 03/09/1994 | EP0429581B1 Induction furnace for heating and temperature homogenization in hot-rolling of thin steel strips |
| 03/08/1994 | US5292383 Improved fish scale resistance and press formability |
| 03/08/1994 | US5292200 Ball-and-roller bearing |
| 03/03/1994 | WO1994004708A1 Process and device for regulating the calorific output in a continuous annealing and processing line for continuously cast metal products |
| 03/03/1994 | WO1994004304A1 Apparatus and method for precision gear finishing by controlled deformation |
| 03/03/1994 | DE4312347A1 Heat resistant roller, used in appts. to mfr. steel plates - comprises outer periphery surface made of para-aromatic polyamide fibre |
| 03/02/1994 | EP0584474A1 Process and apparatus for manufacturing curved helical springs |
| 03/02/1994 | CN2158025Y Wear-resisting steel pipe |
| 03/02/1994 | CN1083194A Steel pipe with hardened wear-proof inner wall and machining device thereof |
| 03/01/1994 | US5290508 Manufacturing process for ring-shaped parts |
| 03/01/1994 | US5290017 Cooling cover for batch coil annealing furnace |
| 02/24/1994 | DE4227812A1 Verfahren und Vorrichtung zur Regelung der Heizleistung in einer Durchlauf-Glühanlage für metallisches Stranggut Method and apparatus for controlling heating output in a continuous annealing line for cast metal products |
| 02/23/1994 | EP0583793A1 Method of irradiating running strip with energy beam |
| 02/23/1994 | EP0583445A1 Work hardened stainless steel for springs. |
| 02/23/1994 | CN2157193Y Laser quenching machine tool for camshaft of motorcycle |
| 02/23/1994 | CN1082763A An inner-shield material to be attached inside a color cathode ray tube and manufacturing method thereof |
| 02/23/1994 | CN1082477A Method for producing austenic stainless steel self tapping and self drilling screw |
| 02/17/1994 | DE4321354A1 Producing cold rolled strip with good deep drawing properties - by subjecting strip to holding phase during heating up at 590-600 deg.C. |
| 02/16/1994 | EP0471679B1 Avoiding lead drag-out during patenting |
| 02/16/1994 | CN1023774C Process for improving the plasticity of cold deformation of low-carbon thread reinforcing steel |
| 02/15/1994 | US5286309 Electric-resistance-welded steel pipe with high strength |
| 02/10/1994 | DE4226291A1 Thermally hardening saw blade teeth - using induction devices to heat teeth in controlled manner via eddy currents |
| 02/10/1994 | DE4225982A1 Verfahren zum kontinuierlichen Glühen von metallischem Gut unter wasserstoffreichem Schutzgas Process for the continuous annealing of metallic material at hydrogen-rich gas protection |
| 02/09/1994 | EP0582180A1 Heat treatment process for wire rods |
| 02/09/1994 | EP0581806A1 Knife blades. |
| 02/08/1994 | US5284680 Cleaning and rapidly heating to temper the martenite steel; immersion in a bath melt of zinc or zinc alloy to coat; cooling |
| 02/08/1994 | US5284327 Extrusion quenching apparatus and related method |
| 02/03/1994 | WO1994002652A1 Rail thermal treatment process |
| 02/02/1994 | CN1081490A Process for mfg. high-strength sucker cod |
| 02/01/1994 | US5282906 Martensitic matrix microstructure with dispersed particles of vanadium and niobium carbonitrides and iron carbide; controlled hot roll finishing and cooling; springs |
| 01/26/1994 | EP0580062A1 Process for manufacturing of thick armour plates |
| 01/20/1994 | WO1994001590A1 Apparatus for continuous heat-treatment of metallic body |
| 01/19/1994 | EP0579365A2 Method of improving wear-resistance characteristics of a porous metal machine part |
| 01/19/1994 | EP0579344A1 Method of manufacturing a gearwheel element of a pinion shaft |
| 01/19/1994 | EP0578696A1 Process for remelting metal surfaces by laser. |
| 01/18/1994 | US5279666 Hot bridle for metal treating line |