Patents
Sitemap › C21 - Metallurgy of iron › C21D - Modifying the physical structure of ferrous metals; General devices for heat treatment of ferrous or non-ferrous metals or alloys; Making metal malleable by decarburisation, tempering, or other treatments › C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor
Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082)
12/1981
12/09/1981EP0041317A1 Method and apparatus for inductively heating valve seat inserts for hardening the seat surfaces
12/01/1981US4303388 Preheating furnace
12/01/1981US4303137 Method for making a cone for a rock bit and product
11/1981
11/25/1981EP0040553A1 Process for producing a dual-phase steel
11/24/1981US4302658 Welding silicon steel
11/12/1981WO1981003183A1 Method and device for heat treatment of moving lengthy articles
11/10/1981US4299401 Piston ring and method of making same
11/10/1981CA1112139A1 Method and apparatus for treating strip
11/10/1981CA1112136A1 Method of stabilizing viscosity and increasing concentration of aqueous magnesia slurry
11/04/1981EP0039019A1 Equipment for the continuous contactless control of the structural condition of a cold-drawn band
11/04/1981EP0038993A1 Method and apparatus for heat treating multilayer welded joints
11/03/1981US4298406 Manufacture of steel products
11/03/1981US4298188 Machines for cooling metal sheets or like products
10/1981
10/27/1981US4297398 Manufacturing coated steel strip
10/27/1981US4296919 Apparatus for continuously producing a high strength dual-phase steel strip or sheet
10/21/1981EP0038084A1 Method of treating a solid web
10/21/1981EP0037844A1 Process and apparatus for heat exchange between a web and its moving support
10/20/1981US4295900 Rolled wire having a fine-grain structure
10/14/1981EP0037752A1 Device for guiding webs and its applications
10/13/1981US4295033 Annealing oven
10/13/1981US4294632 Method for overaging of hot dip metal coated steel material
10/13/1981US4294098 Apparatus for manufacturing steel spring leaves
10/13/1981CA1110446A1 Method for cooling an aluminum strip during the process of heat treatment
10/06/1981US4293350 Grain-oriented electromagnetic steel sheet with improved watt loss
10/06/1981US4293335 Roll for manufacturing float glass
10/06/1981CA1110196A1 Non slipping driving and braking engines for sliding material through heat treatment zones
09/1981
09/29/1981US4292097 High tensile strength steel sheets having high press-formability and a process for producing the same
09/29/1981CA1109772A1 Process of producing an electrically insulative glass film on silicon steel
09/23/1981EP0036035A2 Method and apparatus for controlling tensions in a continuous steelstrip annealing furnace
09/22/1981US4290829 Process for box annealing a steel strip coil
09/22/1981US4290753 Heat treating basket
09/22/1981CA1109371A1 Continuous heat-treatment process for steel-strip
09/15/1981US4289944 Apparatus for reheating, storing and conveying cast bars
09/08/1981US4288261 Waving
09/08/1981US4288260 Method of heat treatments of amorphous alloy ribbons
09/08/1981US4288258 Method for cooling a metal strip during the process of heat treatment
09/08/1981US4287940 Cooling apparatus for diffusers
09/01/1981US4287007 For use in a rotary wood chipper
09/01/1981US4286986 With controlled amounts of niobium
08/1981
08/26/1981EP0034283A2 Process and apparatus for the zonal heating or cooling of elongated workpieces
08/25/1981US4285741 Process for producing high-strength, low yield ratio and high ductility dual-phase structure steel sheets
08/20/1981WO1981002309A1 Furnace for heating articles
08/19/1981EP0034057A2 Method for postweld heat treatment
08/19/1981EP0033845A1 Process and apparatus for changing transport rollers in a roller-hearth furnace
08/18/1981US4284441 Method for improvement of magnetic property of thin strip of amorphous alloy
08/18/1981US4284439 Process for the production of sheet and strip from ferritic, stabilized, stainless chromium-molybdenum-nickel steels
08/18/1981US4284438 Manufacture of steel products
08/18/1981CA1107179A1 Method for making a hard steel elongated element
08/18/1981CA1107042A1 Method of manufacturing springs, including the production of rod therefor
08/12/1981EP0033600A2 Process for producing a steel with dual-phase structure
08/11/1981CA1106597A1 Tangentially gas-fired muffle
08/05/1981EP0033194A2 Steel rod rolling process, and apparatus
08/04/1981US4282047 Method of producing steel pipe material for oil well
08/04/1981US4281824 Heat treating apparatus
08/04/1981CA1106168A1 Method and apparatus for heating coils of strip
07/1981
07/29/1981EP0032775A1 Furnace, especially a ceramic or heating furnace
07/29/1981EP0032583A1 Process for continuously annealing of a cold rolled steel strip
07/29/1981EP0032536A2 Device for obtaining a uniform temperature distribution in a hot steel strip during rolling
07/28/1981US4280857 Wire in slip drawing
07/21/1981US4279952 Carbon fibers, felts, carbonization
07/21/1981US4279528 Tulip member for a tripod joint and process for producing the same
07/14/1981US4278421 Industrial furnaces for the heat treatment of metallic workpieces
07/14/1981US4278242 Bell-type coil annealing furnace inner cover
07/14/1981CA1104910A1 Method of treating strip surfaces for metallic coating
07/08/1981EP0031517A1 Gas-liquid cooling apparatus
07/07/1981US4276979 Slab cooling and conveying apparatus
07/01/1981EP0031013A1 Steel strip continuous annealing furnace
07/01/1981EP0031012A1 Steel strip continuous annealing apparatus
06/1981
06/30/1981US4275569 Internal cooling of heat exchanger tubes
06/24/1981EP0030699A2 Process for producing a wire rod for cold forging
06/24/1981EP0030614A1 Steel strip continuous annealing apparatus
06/23/1981CA1103569A1 Preheat and cleaning system
06/16/1981US4273159 Earth boring apparatus with multiple welds
06/16/1981CA1103065A1 Well casing steel
06/09/1981US4271571 Process for manufacturing shadow mask of Braun tube for color TV
06/09/1981CA1102850A1 Apparatus for providing a curtain of cooling liquid
06/09/1981CA1102673A1 Multilayer insulating material and process for production thereof
06/03/1981EP0029660A1 Slicing knife and method of making it
06/02/1981US4270959 Method for the heat treatment of metal strip
05/1981
05/19/1981US4268326 Two-stage decarburization, specific water and hydrogen partial pressures
05/19/1981US4268246 Method and apparatus for metal object heat treatment
05/12/1981CA1101077A1 Workpiece rotating and feeding apparatus for induction heating inductor
05/06/1981EP0027828A1 Inductor for heating rotating metal workpieces, in particular crankshafts, for the purpose of surface hardening at varying operational depths
04/1981
04/29/1981EP0027787A1 Installation for the recovery of sensible heat from slabs produced by continuous casting
04/28/1981US4263798 Method of operating a wide band hot rolling mill
04/14/1981US4261769 Steel, resistant to cracking or breaking by vibration
04/14/1981US4261739 Ferritic steel alloy with improved high temperature properties
04/14/1981CA1099406A1 Reducing magnetic hysteresis losses in thin tapes of soft magnetic amorphous metal alloys
04/14/1981CA1099202A1 Process and apparatus for the heat treatment of metallic strap coils
04/01/1981EP0026032A1 Heat treatment process and apparatus
03/1981
03/31/1981US4259126 Nickel, chromium, titanium, aluminum, iron, and impurities
03/31/1981US4259125 Process for making low carbon fibers
03/31/1981US4258906 Device for gradient heating of wire
03/31/1981CA1098426A1 Electromagnetic silicon steel from thin castings
03/24/1981US4257829 Method for cooling an aluminum strip during the process of heat treatment
03/24/1981US4257767 Furnace temperature control
03/24/1981CA1098180A1 Device for inductively heating cylindrical surfaces
03/24/1981CA1098012A1 Rail hardening machine
03/17/1981US4256519 Method for heat treatment of low melting point-metal plated steel band
03/17/1981US4256518 Welding and austenitizing earth boring apparatus
1 ... 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301