| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 06/02/1988 | WO1988003959A1 Process and device for the partial heat treatment and drawing of steel wire rod products and application of said process |
| 06/01/1988 | EP0269245A1 Solution heat treatment of engine poppet valves |
| 06/01/1988 | EP0268735A1 Method for the folded or flanged connection of part of a tube to a connecting piece |
| 06/01/1988 | DE3640087A1 Process and device for scale-and tarnish-free annealing of welded pipes in line |
| 06/01/1988 | DE3639631A1 Method and apparatus for annealing strand-shaped stock |
| 05/26/1988 | DE3639403A1 Process for improving the corrosion resistance of welded workpieces of stainless steel, and correspondingly produced workpiece |
| 05/26/1988 | DE3638725A1 Method for the heat treatment of metallic stock, in particular metal strips |
| 05/24/1988 | US4746101 Induction hardening of gear teeth |
| 05/19/1988 | DE3638816C1 Method for the production of steel rails with low residual stress by means of roller straightening |
| 05/18/1988 | CN86106415A Making-up method of heating salt bath for quenching hand saw blade |
| 05/17/1988 | US4745252 In a reheating furnace |
| 05/17/1988 | US4744838 Method of continuously processing amorphous metal punchings |
| 05/17/1988 | US4744836 Method for selectively heating a workpiece subjected to low temperature thermomechanical processing |
| 05/17/1988 | CA1236688A1 Heat treating, curing or stress relieving furnace |
| 05/11/1988 | EP0267080A1 Apparatus for the internal and external quenching of tubular work pieces |
| 05/11/1988 | EP0266818A1 Feed-through element for vacuum apparatus and apparatus provided with such feed-through elements |
| 05/11/1988 | EP0266509A1 Apparatus for continuously annealing metal strip and hearth roll therefor |
| 05/10/1988 | US4743309 Method for zone heat treatment of a metallic workpiece |
| 05/10/1988 | US4743197 High temperature fan plug apparatus |
| 05/10/1988 | US4743196 Continuous annealing furnace for a strip |
| 05/10/1988 | CA1236382A1 Method of and apparatus for remelting and hardening a shaft |
| 05/10/1988 | CA1236291A1 Fluidized bed furnace heated by infrared radiation |
| 05/04/1988 | EP0266167A1 Insitu energy beam processing of railroad track and equipment for increasing service lifetime |
| 05/04/1988 | EP0265992A1 Feed-through element for application in a vacuum apparatus; apparatus provided with such feed-through elements as well as wire material formed in such an apparatus |
| 05/04/1988 | EP0265700A1 Method and system for controlling tension to be exerted on metal strip in continuous annealing furnace |
| 05/04/1988 | CN86106929A A new technology of high pressure relaxation treatment for helical compression springs by means of electric pulse |
| 05/03/1988 | US4741785 Process for forming hardened contact surfaces in a universal ball joint |
| 05/03/1988 | CA1235927A1 Work-hardenable substantially austenitic stainless steel and method |
| 04/27/1988 | EP0264459A1 Production of hot-rolled steel strip from continuously cast slabs |
| 04/27/1988 | CN87202638U Clean annealing device |
| 04/20/1988 | EP0264163A1 Process for preventing transverse displacement of metal strip |
| 04/20/1988 | EP0263971A1 Method and device for leveling metal strip to be fed into continuous annealing furnace |
| 04/20/1988 | CN87106902A Method and apparatus for manufacturing hot-rolled steel band |
| 04/19/1988 | US4738733 Method for heat-treatment of a strip |
| 04/19/1988 | US4738577 Furnace for the heat treatment of work pieces |
| 04/14/1988 | DE3730398A1 Verfahren zur beschleunigten abkuehlung von gussteilen A method for accelerated cooling-down of molded parts |
| 04/13/1988 | EP0263439A2 Electromagnetic induction furnace for the thermic treatment of wires |
| 04/13/1988 | EP0263300A1 Method and apparatus for manufacturing coil springs |
| 04/12/1988 | US4737381 Hot-dipped alloy support strips for catalytic converters |
| 04/12/1988 | US4737202 Controlled cooling by spraying |
| 04/12/1988 | US4737201 Varying microstructure to match stresses, temperature and wear conditions encountered in service |
| 04/12/1988 | US4736608 Heat retaining means |
| 04/12/1988 | US4736529 Device for the uniform application of gas on a plane surface |
| 04/12/1988 | CA1234977A1 Cooling apparatus for metal strip |
| 04/12/1988 | CA1234976A1 Apparatus for soaking steel pieces |
| 04/07/1988 | DE3732006C1 Inductor in particular for hardening crankshafts |
| 04/07/1988 | DE3726246C1 Method for hardening rings |
| 04/07/1988 | DE3631552A1 Process for avoiding blue annealing edges in the annealing of steel strip |
| 04/06/1988 | EP0263093A2 Apparatus for heat-treating a continuously moving metal wire |
| 04/06/1988 | EP0262874A2 Cold-rolled steel sheets and method for producing cold-rolled steel sheets |
| 04/06/1988 | EP0262363A2 Process and device for continuously manufacturing tubular articles using longitudinal laser seam welding |
| 04/06/1988 | CN87105296A Method of thermomechanical treatment for a sort of high-speed steel cutter |
| 04/05/1988 | US4736092 Braze heater assembly and method |
| 03/30/1988 | EP0261880A2 Nickel-base alloy heat treatment |
| 03/30/1988 | EP0261570A1 Method for welding nodular iron to steel |
| 03/29/1988 | US4734729 For spreading a fluid composition between sheets or layers |
| 03/29/1988 | CA1234533A1 Process for producing heat-resistant, ferritic stainless steel sheet |
| 03/24/1988 | WO1988002031A1 Process for manufacturing rolled steel products |
| 03/24/1988 | DE3720251C1 Method for cleaning the off-gases from the annealing chamber (carburizing chamber, case-hardening chamber) of annealing installations in the steel industry |
| 03/23/1988 | EP0260717A1 Process for manufacturing rolled steel products |
| 03/22/1988 | US4732624 Induction heating, quenching |
| 03/22/1988 | US4732623 Method of making high strength steel tube |
| 03/22/1988 | US4732367 Installation for the continuous heat treatment of wire rod |
| 03/22/1988 | CA1234338A1 Method and apparatus for quenching steel pipes |
| 03/22/1988 | CA1234337A1 Process for manufacturing cylinder-shaped hollow parts |
| 03/17/1988 | DE3630625A1 Method for the production of an internally galvanised pipe (tube) |
| 03/16/1988 | EP0260233A1 A process to connect austenitic manganese steel frogs of point to carbon or low-alloy steel rails |
| 03/16/1988 | EP0259825A2 Process and apparatus for edge-hardening work pieces |
| 03/16/1988 | CN87206171U High-frequency hardening device for ring-type workpieces |
| 03/15/1988 | US4731131 Method of subjecting welded structure to heat treatment |
| 03/15/1988 | US4730970 Selectively hardened self drilling fasteners |
| 03/15/1988 | US4730811 For metals |
| 03/15/1988 | CA1234019A1 Coating of wire or strip |
| 03/15/1988 | CA1233985A1 Vacuum heat treating furnace and quench system with drop transfer |
| 03/15/1988 | CA1233984A1 Strip cooling apparatus for continuous annealing furnace |
| 03/10/1988 | WO1988001652A1 Process for heat-treating rolled steel product |
| 03/09/1988 | CN87204413U Cooling device for heat-treating wire |
| 03/09/1988 | CN86103917B Heat treatment for increasing fatigue strength of 18cr 2ni 4wa steel crankshaft |
| 03/08/1988 | US4729912 Aluminum coated, catalyst supports, exhaust systems |
| 03/08/1988 | US4729802 Hardening |
| 03/08/1988 | US4729800 Method for cooling steel strip |
| 03/08/1988 | CA1233734A1 Steel pipe hardening apparatus |
| 03/08/1988 | CA1233639A1 Furnace for heating up cylindrical charges |
| 03/02/1988 | EP0257540A2 Processing steel slabs |
| 03/01/1988 | US4728761 Method and apparatus for hardening axially spaced cams on a camshaft |
| 03/01/1988 | US4728374 Solution heat treated engine poppet valves |
| 03/01/1988 | US4727641 Thermoplastic method of reducing the diameter of a metal tube |
| 02/25/1988 | DE3643285A1 Charging and discharging machine for a reheating furnace for articles to be reheated, such as slabs, ingots or the like |
| 02/25/1988 | DE3628264A1 Process for the manufacture of components from steel of high strength with at the same time high toughness, which retain these properties even after hot-forming |
| 02/24/1988 | EP0255999A1 Device for heating simultaneously one or several steel cables |
| 02/24/1988 | CN87104467A Process for making vulnerable parts of grain and oil machinery |
| 02/24/1988 | CN86108728B Continuous electric baking machine for daylight lamp |
| 02/23/1988 | US4726857 Jig unit and method for heat treatment of vessel-like workpiece |
| 02/23/1988 | US4726856 Method for heat treating metal pipes |
| 02/23/1988 | US4726855 Winding annealing coils around yokes of cores, flowing electric current to heat coils |
| 02/23/1988 | US4726853 Ductility, corrosion resistance |
| 02/23/1988 | US4726852 Press forming titanium, or alloy, then heat treatment |
| 02/23/1988 | US4726432 Method of manufacturing an earth boring drill bit |
| 02/23/1988 | US4726417 Adamite compound roll |
| 02/23/1988 | CA1233095A1 Process for producing grain-oriented electrical steel sheet having both improved magnetic properties and properties of glass film |