| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
|---|
| 10/09/1991 | CN2086370U Spiral reverse burning forging heating furnace |
| 10/09/1991 | CN1014271B Furnace load/unload equipment for long billet and tube |
| 10/09/1991 | CN1014269B Furnace for the heat treatment of work pieces |
| 10/09/1991 | CN1014268B Annealing furnace |
| 10/09/1991 | CN1014211B Method for producing roller chain with low-carbon low-alloy steel |
| 10/08/1991 | US5054746 Apparatus for hardening rails |
| 10/08/1991 | US5054212 Gas-sealing device for web passage section located at treatment chamber wall |
| 10/05/1991 | CA2039385A1 Helium based protective environment for non-continuous heat treatment of metals |
| 10/02/1991 | EP0449030A2 Process for annealing steel material |
| 10/02/1991 | EP0449003A2 Apparatus for cooling rolled strip |
| 10/02/1991 | DE4037170A1 Wire patenting using lead bath - uses wire fed from bath through gravel bed with constantly changing path ensuring wire passes through non-contaminated gravel |
| 10/02/1991 | DE4009868A1 Rolled strip cooler - with spray beams sliding across line of material travel at the cooling roller conveyor for close temp. tolerances |
| 10/02/1991 | CN2085942U Heat treatment furnace with full-fibrofelt lining using residual-oil |
| 10/02/1991 | CN2085799U Equipment for producing lining ring made of steel band by fast heating, rolled forming and quenching |
| 10/01/1991 | US5052923 Oven for partial heat treatment of tools |
| 10/01/1991 | US5052124 Method for transporting hot-rolled wire rod and apparatus therefor |
| 09/26/1991 | DE4009228A1 Differential cooling system for profiled metal prods. e.g. rails - has controlled flows of pressurised water, some mixed with air, directed at different parts of prod. |
| 09/25/1991 | EP0229181B1 Method of reestablishment of camshafts |
| 09/25/1991 | CN1014078B Process for heat treatment of metallic pieces by continous furnace and apparatus thereof |
| 09/24/1991 | US5050416 Sealing element for feeding through at least one elongated object such as wire and a vacuum apparatus provided with one or more of sealing elements |
| 09/20/1991 | CA2038442A1 Ferrous alloy for turbine components and heat treatment for improved properties |
| 09/18/1991 | EP0447363A1 Discharging device in an installation of various thermic treatments |
| 09/18/1991 | CN1013961B High temp. character of improved selected chromium-molybdenum improved alloy and method for soldable ability |
| 09/17/1991 | US5049207 Induction, wear resistance |
| 09/17/1991 | US5048802 Diffuser system for annealing furnace with chain reinforced, nodular iron convector plates |
| 09/17/1991 | US5048162 Manufacturing thin wall steel cartridge cases |
| 09/12/1991 | DE4035155C1 Heat treatment plant for small parts - comprises continuous furnace having rotatable gp. of three baskets which pass through shaft |
| 09/11/1991 | EP0445699A2 Method of forming chilled layer and apparatus therefor |
| 09/10/1991 | CA1288824C Method and apparatus for continuous production of tubular bodies by means of laser longitudinal seam welding |
| 09/04/1991 | EP0444967A2 Cold-rolled steel sheets or hot-dip galvanized cold rolled steel sheets for deep drawing |
| 09/04/1991 | CN1013742B Method of and apparatus for producing tubes with small diameter and thick wall |
| 09/03/1991 | US5045124 Casting a melt, annealing, rolling |
| 09/03/1991 | US5044938 Method of controlling temperature of a joining area between two different strip materials in a continuous strip processing line |
| 09/03/1991 | US5044611 Automatic installation for the forming and thermal treatment of circular pieces |
| 08/29/1991 | DE4005653A1 Box annealing furnace - comprises heat-resistant elastic seal with its top end attached to upper oven part and its weighted lower end resting on lower oven part |
| 08/28/1991 | EP0443201A1 Industrial furnace |
| 08/27/1991 | US5042564 Method for the manufacture of formable steel |
| 08/20/1991 | US5041174 Austenitic-ferritic alloy; railroad tracks |
| 08/20/1991 | US5041167 Hot forging, then cooling a steel of carbon, silicon, molybdenum, manganese, chromium, vanadium, nitrogen, aluminum and iron ; crystal structure |
| 08/20/1991 | US5040287 Heating equipment installation system |
| 08/14/1991 | EP0441766A1 Apparatus for hardening rails |
| 08/13/1991 | US5039357 Method for nitriding and nitrocarburizing rifle barrels in a fluidized bed furnace |
| 08/10/1991 | WO1991012702A1 Radiofrequency heating of thin filaments |
| 08/10/1991 | CA2074185A1 Radiofrequency heating of thin filaments |
| 08/08/1991 | DE4102604A1 Controlled cooling of wide flat prod. - esp. for uniform cooling of hot steel strip |
| 08/07/1991 | EP0439464A1 A method and apparatus for correcting deviations in the shape of hardened metal objects |
| 08/06/1991 | US5037490 Process for allowing pretreatment of assembled camshaft components |
| 07/31/1991 | EP0438971A1 Coated metallic substrate |
| 07/31/1991 | EP0438592A1 Production method of unidirectional electromagnetic steel sheet having excellent iron loss and high flux density |
| 07/30/1991 | US5035405 Apparatus for annealing and quenching |
| 07/30/1991 | US5035403 Apparatus for cooling a cylindrical member in linear motion |
| 07/30/1991 | US5035036 Arrangement for manufacturing steel strips |
| 07/25/1991 | DE4023854C1 Steel wire prodn. - involves pre-drawing, heat treating and finishing |
| 07/24/1991 | CN1013282B Technology for making spring with ordinary carbon steel |
| 07/23/1991 | US5034588 Induction shaft heat treatment apparatus |
| 07/23/1991 | US5034586 Induction heating assembly including an interposed closed conductive loop for suppression of intercoil coupling |
| 07/23/1991 | US5033926 Heat retaining means |
| 07/23/1991 | CA1286575C Preheating method of steel strips |
| 07/16/1991 | US5032192 Carburization of steel |
| 07/16/1991 | US5032191 Heat treatment |
| 07/16/1991 | CA1286209C Production of high strength seamless steel pipe with superior resistanceagainst sulfide stress corrosion cracking |
| 07/16/1991 | CA1286207C Process for laser hardening drilling bit cones having hard cutter inserts |
| 07/11/1991 | WO1991009980A1 Production of anticorrosive and antiwearing alloy |
| 07/10/1991 | EP0436032A1 Method of producing high-strength stainless steel strip having duplex structure and excellent spring characteristics |
| 07/10/1991 | EP0435968A1 Process for manufacturing coil-break-free hot strip and age-resistant hot-galvanized cold strip. |
| 07/09/1991 | US5030297 Hot working, cooling, and tempering of an aluminum killed steel |
| 07/09/1991 | CA1285852C Liquid flow control device in a pipe, namely of a coolant |
| 07/09/1991 | CA1285791C Ferritic stainless steel sheet or strip, namely for exhaust systems |
| 07/04/1991 | DE4040520A1 Transmission shaft made of iron alloy - with outer hardened and inner relatively unhardened layers |
| 07/03/1991 | CN1052698A Expert system application in soaking furnace steel-smelting control |
| 07/02/1991 | US5028281 Camshaft |
| 07/02/1991 | US5028275 Method of producing a liner to cover an explosive charge |
| 06/26/1991 | EP0434487A1 Stocking device for metallurgical products, such as thin slabs |
| 06/26/1991 | EP0433786A1 Apparatus for processing grain-oriented electrical steel strip |
| 06/26/1991 | EP0124574B1 Method and apparatus for the manufacture of non-allergy creating precious metal objects |
| 06/26/1991 | CN2079617U Ac electric contact annealing device |
| 06/26/1991 | CN1012966B Heat treatment and its device for producing high strength steel rail |
| 06/25/1991 | US5026439 Process for preparing wound core having low core loss |
| 06/25/1991 | US5026436 Stress corrosion cracking resistance, controlled heating, differential cooling of inner and outer surfaces; non-magnetizable drill stems and rod sections |
| 06/25/1991 | US5026312 Method of manufacturing a shadow mask, shadow mask manufactured according to such a method, and color display tube comprising such a shadow mask |
| 06/23/1991 | WO1991009933A1 Steel wire having a structure of the cold-drawn lower bainite type; method for producing such wire |
| 06/23/1991 | CA2069511A1 Steel wire having a structure of the cold-drawn lower bainite type and method for producing such wire |
| 06/19/1991 | EP0432732A2 Thermal flattening semi-processed electrical steel |
| 06/19/1991 | EP0432531A1 Apparatus for cooling wire rods |
| 06/19/1991 | EP0432498A2 High tensile cold rolled steel sheet and high tensile not dip galvanized steel sheet having improved stretch flanging property and process for producing same |
| 06/19/1991 | CN1012906B Wear resistant rails having capability of preventing propagation of unstable rupture |
| 06/18/1991 | US5024582 Steam turbine rotor having graded weldments |
| 06/13/1991 | WO1991008089A1 A steel bar and billet heating system located upstream of shears for further processing |
| 06/12/1991 | EP0431502A2 Non-oriented electrical strip and method of manufacturing |
| 06/12/1991 | EP0431224A1 Method of manufacturing a leaf of a leaf spring |
| 06/12/1991 | CN1012826B Continuous annealing method for deep drawable extra-low carbon steel |
| 06/11/1991 | US5022936 Melting treatment resulting in chromium depleted layer changed to delta ferrite; corrosion resistance; reduced tensile stress |
| 06/11/1991 | US5022931 Injecting inert gas into hole, fastening a cap, heating |
| 06/11/1991 | CA1284824C Inductor for inductive heating of metallurgical products |
| 06/06/1991 | DE3939935A1 Producing crank shafts - by machining simultaneously moving surface, side face, and recesses between surface and faces followed by hardening and final grinding |
| 06/06/1991 | DE3939383A1 Device for cooling sealing ring in cupola furnace - has seal in steel ring welded into base and surrounded on three sides by cooling canal |
| 06/05/1991 | EP0430733A1 Device for turning metallurgical products of square or rectangular section through an angle of 180 degrees |
| 06/05/1991 | EP0429581A1 Induction furnace for heating and temperature homogenization in hot-rolling of thin steel strips. |
| 06/05/1991 | CN1051873A Storage enclosure for metallurgical products |
| 06/04/1991 | US5020208 Process for heating a semifinished product produced by continuous casting or deformation |