| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 09/13/1988 | US4770719 Method of manufacturing a low yield ratio high-strength steel sheet having good ductility and resistance to secondary cold-work embrittlement |
| 09/07/1988 | EP0281249A1 Improved method of heat treating ferrous metals |
| 09/06/1988 | US4769092 Variable cooling device for turbo engine wall parts |
| 09/06/1988 | US4769091 Amorphous metal alloy |
| 09/06/1988 | US4768363 Method of levelling two-layered clad metal sheet |
| 09/06/1988 | CA1241507A1 Barium or chromium additives to magnesium oxide coating slurry |
| 08/31/1988 | EP0279896A1 Method of manufacturing cast iron sheaves for hoisting devices |
| 08/31/1988 | EP0151165B1 Improvement in method and apparatus for heat treating |
| 08/30/1988 | US4767493 Molds, spacings, controlling, thermal properties |
| 08/30/1988 | US4767472 Method for the treatment of steel wires |
| 08/16/1988 | US4763880 Rotary hearth multi-chamber, multi-purpose furnace system |
| 08/16/1988 | CA1240592A1 Processing for cube-on-edge oriented silicon steel |
| 08/16/1988 | CA1240507A1 Device for the uniform application of gas on a plane surface |
| 08/10/1988 | EP0277143A1 Shallow case hardening and corrosion inhibition process |
| 08/10/1988 | CN88100515A High temp. character of improved selected chromium-molybdenum improved alloy and method for soldable ability |
| 08/09/1988 | US4762577 9 Chromium- 1 molybdenum steel alloy having superior high temperature properties and weldability, a method for preparing same and articles fabricated therefrom |
| 08/03/1988 | EP0276461A2 Method for processing large cast iron dies, particularly for vehicle sheet-metal pressing, and the apparatus for its implementation |
| 08/02/1988 | US4761192 Camshafts for automobiles |
| 08/02/1988 | US4761191 Method of forming closely sized openings |
| 08/02/1988 | CA1239853A1 Quench oils, concentrates for making quench oils and methods of treating metals |
| 07/27/1988 | EP0275529A1 Method for preparing large cast iron dies, particularly for vehicle-sheet metal pressing, and the apparatus for its implementation |
| 07/26/1988 | US4759808 Method for hardening cam lobes on a camshaft |
| 07/20/1988 | EP0275220A2 Apparatus for internally and externally quenching pipes |
| 07/13/1988 | EP0274335A2 Induction for the inductive reheating of metallurgical products |
| 07/13/1988 | EP0274206A2 Heating stock in a heating chamber |
| 07/13/1988 | CN87107467A Lazer heat treatment technique of internal combustion engine cylinder bore |
| 07/12/1988 | US4756774 Immersing metal pieces in fluidized bed of particles, heating with ammonia, nitrogen, and natural gas, then with nitrogen and water, contacting with polymeric additives, curing |
| 07/12/1988 | US4756773 Directing noble gas into furnace, allowing furnace to be cooled, injecting second non-noble gas |
| 07/12/1988 | CA1239078A1 Process for heat treating ferrous material |
| 07/06/1988 | EP0273571A2 Separating-agents composition and method using same |
| 07/05/1988 | US4754952 Fluidized-bed type carburizing furnace means for use as bright heat-treating furnace |
| 06/30/1988 | DE3642839A1 Process for producing a sintered metal workpiece with a hardened edge layer |
| 06/29/1988 | EP0272867A2 Method for improving magnesium oxide steel coatings |
| 06/29/1988 | EP0272788A1 A method of making wear resistant gray cast iron |
| 06/28/1988 | US4754124 Resistance heaters |
| 06/28/1988 | US4753691 Controlled cooling or isothermal holding for transformation to pearlite |
| 06/28/1988 | US4753687 Easy removal of excess from silicon steels after high temperature annealing |
| 06/22/1988 | EP0271657A2 Fe-base soft magnetic alloy and method of producing same |
| 06/21/1988 | CA1238262A1 Machine for three dimension shaping and/or straightening of steel plates with flame heating followed by water and/or air cooling |
| 06/21/1988 | CA1238183A1 High temperature fluidized bed furnace |
| 06/09/1988 | DE3702784C1 Method for hardening steel tubes |
| 06/07/1988 | US4749419 Method for heat treating rail |
| 06/01/1988 | DE3639658A1 Process for producing castings from a nodular graphite iron |
| 06/01/1988 | CN85101950B High temp. ballshaping and annealing technology of high carbon low alloyed steel |
| 05/31/1988 | US4747887 Method and device for actuating shape memory alloy member |
| 05/25/1988 | CN87201684U Internal combustion high temp. flow particle furnace |
| 05/24/1988 | US4746376 Method of preventing diffusion of N2, O2 or C in selected metal surfaces |
| 05/24/1988 | US4746289 Heat treating process, hood for carrying out this process, and its use in heat treating furnaces |
| 05/24/1988 | US4746101 Induction hardening of gear teeth |
| 05/18/1988 | CN87206803U Half-circle inductor block for surface quenching of big axle journal |
| 05/18/1988 | CN87106584A Method of operating maching for relaxing of workpieces by vibration |
| 05/18/1988 | CN86106415A Making-up method of heating salt bath for quenching hand saw blade |
| 05/17/1988 | US4744838 Method of continuously processing amorphous metal punchings |
| 05/17/1988 | US4744837 Bright annealing of stainless steels |
| 05/17/1988 | US4744836 Method for selectively heating a workpiece subjected to low temperature thermomechanical processing |
| 05/17/1988 | US4744226 Apparatus for cooling a metal product in motion |
| 05/11/1988 | EP0267080A1 Apparatus for the internal and external quenching of tubular work pieces |
| 05/11/1988 | CN87211115U Crankshaft medium frequency quenching inductor |
| 05/10/1988 | US4743309 Method for zone heat treatment of a metallic workpiece |
| 05/10/1988 | CA1236382A1 Method of and apparatus for remelting and hardening a shaft |
| 05/10/1988 | CA1236293A1 Workpiece charger for heating furnace |
| 05/04/1988 | EP0266167A1 Insitu energy beam processing of railroad track and equipment for increasing service lifetime |
| 05/04/1988 | CN87105737A Process for rapid quenching in a fluidized bed |
| 05/03/1988 | US4741785 Process for forming hardened contact surfaces in a universal ball joint |
| 05/03/1988 | US4741695 Walking beam type reheating furnace |
| 05/03/1988 | CA1235985A1 Materials system for high strength corrosion resistant bimetallic products |
| 04/27/1988 | EP0264459A1 Production of hot-rolled steel strip from continuously cast slabs |
| 04/27/1988 | CN87107579A Magnetic-field quenching bath |
| 04/26/1988 | US4740251 Calcining magnesium hydroxide with barium, chromium salts, silica; slurrying, annealing |
| 04/26/1988 | US4739622 Apparatus and method for the deep cryogenic treatment of materials |
| 04/20/1988 | CN87106902A Method and apparatus for manufacturing hot-rolled steel band |
| 04/19/1988 | US4739148 Apparatus for improving surface quality of rotary machine parts |
| 04/19/1988 | US4738731 Method of heat treating metal using a washable synthetic quenchant |
| 04/19/1988 | US4738577 Furnace for the heat treatment of work pieces |
| 04/19/1988 | US4738301 Method for mitigating solidification segregation of steel |
| 04/12/1988 | US4737202 Controlled cooling by spraying |
| 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 | 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 | EP0262324A1 Process for rapid quenching in a fluidized bed |
| 04/06/1988 | EP0262225A1 Installation for laser treatment of materials |
| 04/06/1988 | CN87105296A Method of thermomechanical treatment for a sort of high-speed steel cutter |
| 04/05/1988 | CA1234740A1 Promoting directional grain growth in objects |
| 03/30/1988 | EP0261462A2 Radiant tube burner comprising a catalyst bed for a heat treatment furnace |
| 03/30/1988 | EP0261461A2 Method and apparatus for heat treating metal work pieces |
| 03/30/1988 | EP0261278A1 Heating apparatus |
| 03/30/1988 | EP0261273A1 Method for the operation of a machine for stress relief by vibration |
| 03/29/1988 | CA1234532A1 High tensile-high toughness steel |
| 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 | US4732623 Method of making high strength steel tube |
| 03/22/1988 | CA1234338A1 Method and apparatus for quenching steel pipes |
| 03/16/1988 | EP0260207A1 Apparatus for studying quenching fluids and the quenchability of materials |
| 03/16/1988 | EP0259414A1 Apparatus for thermal treatments of thin parts such as silicon wafers. |
| 03/16/1988 | CN87105410A Carbon potential regulation in low-temperature methanol catalyst cracking |
| 03/15/1988 | US4730811 For metals |