| Patents for C21D 1 - General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (27,435) |
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| 03/07/1989 | US4810312 Treatment of superalloy surfaces |
| 03/07/1989 | US4810311 Process for manufacturing a high strength rail |
| 03/07/1989 | US4809765 Method for controlling solidification segregation of steel |
| 03/02/1989 | DE3728041A1 Method for the production of bent parts from pre-hardened metals by cold forming |
| 03/02/1989 | DE3727937A1 Heat insulation of skid pipes, support pipes or transverse pipes of an industrial furnace installation |
| 03/01/1989 | EP0305114A1 Heat treating oil |
| 02/28/1989 | US4808791 Method for processing large cast iron dies, particularly for vehicle sheet-metal pressing, and the apparatus for its implementation |
| 02/28/1989 | US4807853 Continuous furnace for gas carburizing and hardening |
| 02/28/1989 | CA1250513A1 Aqueous quenchants containing polyoxazolines and n- vinyl heterocyclic polymers |
| 02/23/1989 | WO1989001529A1 Control of straightness in scanning induction hardening of steel |
| 02/23/1989 | WO1989001385A1 Workpiece-machining device |
| 02/21/1989 | US4806728 Laser process apparatus |
| 02/21/1989 | US4805881 Internal gas generator for heat treating furnace |
| 02/16/1989 | DE3726466A1 Werkstueckbearbeitungsvorrichtung Werkstueckbearbeitungsvorrichtung |
| 02/15/1989 | EP0303419A1 Process for laser hardsurfacing drill bit cones having hard cutter inserts |
| 02/15/1989 | CN1003309B Technology for forging and rolling steel ball of high wear resistence and low manganese content |
| 02/09/1989 | WO1989001051A1 Method and apparatus for forming bainite |
| 02/09/1989 | DE3725175A1 Process for the decarbonising annealing of metal parts |
| 02/09/1989 | DE3725174A1 Method of bright and recrystallisation annealing |
| 02/07/1989 | US4803037 Pipe quenching apparatus |
| 02/07/1989 | US4802441 Double wall fast cool-down furnace |
| 02/01/1989 | EP0301168A1 Apparatus and method for the deep cryogenic treatment of materials |
| 01/24/1989 | US4799969 To improve glass-like insulation film |
| 01/24/1989 | US4799881 "Twist-lock" gas nozzle for a heat treating furnace |
| 01/24/1989 | CA1249207A1 Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes |
| 01/18/1989 | EP0299111A2 Method and apparatus for straightening unbalanced workpieces |
| 01/18/1989 | CN2031008U Surface local hardening device for crushing roll teeth of cane crusher |
| 01/17/1989 | US4798368 Apparatus for controlled slow cooling of steel tubulars |
| 01/11/1989 | CN2030598U Medium-cooling performance determining instrument for double-beam laser quench |
| 01/10/1989 | US4797532 Apparatus for laser treatment of materials |
| 01/05/1989 | DE3734168C1 Process and installation for the heat treatment of metallic objects in a fluidised-bed retort |
| 01/04/1989 | CN1030132A Process for preheating blanks casted in continous casting machine or worked in metal working apparatus in order to send them into metal working and/or reworking machine |
| 01/04/1989 | CN1030097A Thermomechanical annealing technology for martensite steel sections |
| 01/04/1989 | CN1030061A 材料输送辊 Material conveyor roller |
| 12/29/1988 | DE3719735A1 Gas-tight furnace, in particular vacuum furnace |
| 12/29/1988 | DE3719695A1 Gas-tight furnace, in particular vacuum furnace |
| 12/28/1988 | EP0297024A1 Method for hardening a hollow article |
| 12/27/1988 | US4793873 Coating with magnesium oxide, high temperature annealing, removal of boron using group six compounds |
| 12/21/1988 | EP0296102A1 Device with several components for heat treatment |
| 12/21/1988 | EP0295500A1 Hot rolled steel sheet with a high strength and a distinguished formability |
| 12/21/1988 | EP0214208B1 Linear spraying device |
| 12/21/1988 | CN87214522U Colling bath for quenching |
| 12/20/1988 | CA1246971A1 Aqueous solution for cooling cold-rolled steel strip in a continuous annealing process |
| 12/20/1988 | CA1246969A1 Method for producing high-strength steel having improved weldability |
| 12/14/1988 | EP0294628A2 Process for heat treating a heat exchanger tube surrounded by a support plate |
| 12/13/1988 | US4790888 Stop-off composition |
| 12/13/1988 | US4790885 Direct quenching after rolling and tempering process |
| 12/13/1988 | CA1246339A1 Apparatus for cooling a moving metal product |
| 12/07/1988 | EP0294134A2 Manufacture of ductile high-permeability grain-oriented silicon steel |
| 12/06/1988 | US4789410 Minimization of temperature differences due to thickness variations; uniformity, noncracking |
| 12/06/1988 | US4789333 Convective heat transfer within an industrial heat treating furnace |
| 11/30/1988 | EP0293286A1 Method and device for manufacturing articles for magnetic use |
| 11/30/1988 | EP0293002A1 Method for heat-treating steel rail head |
| 11/30/1988 | EP0292953A1 Transport roller |
| 11/29/1988 | US4788394 Multi-wire induction heating |
| 11/29/1988 | US4787945 High nickel chromium alloy |
| 11/29/1988 | US4787944 Using high density radiation and self-cooling |
| 11/29/1988 | CA1245545A1 Method and apparatus for applying heat to articles and materials |
| 11/24/1988 | DE3716134A1 Method of reworking cylindrical components |
| 11/23/1988 | EP0292250A1 Rotary gas seals and turbine and compressor blades |
| 11/22/1988 | US4786772 Induction heating coil for heat-treating metallic tubes |
| 11/22/1988 | US4786249 Spring heat treating furnace |
| 11/22/1988 | US4785646 Method of cooling hot-rolled steel plate |
| 11/17/1988 | WO1988008884A1 Ejector apparatus of fluidized bed heat-treating furnace |
| 11/17/1988 | EP0197079B1 Method for the continuous tempering of sheet metal such as steel and plant for implementing it |
| 11/10/1988 | DE3714259A1 Device for the continuous annealing of pipes |
| 11/09/1988 | EP0290196A2 Method for improving magnesium oxide steel coatings using non-aqueous solvents |
| 11/08/1988 | CA1244325A1 Method and apparatus for laser hardening of steel |
| 11/02/1988 | EP0289435A1 Gas-cooled vacuum furnace for thermal treatment |
| 11/02/1988 | EP0288661A1 Method for the selective decarborization of ferrous alloys |
| 11/01/1988 | US4781770 Process for laser hardfacing drill bit cones having hard cutter inserts |
| 11/01/1988 | US4781769 Separating-agent composition and method using same |
| 10/26/1988 | EP0288036A2 Process for cooling a heated material, and device to carry out the process |
| 10/26/1988 | EP0287790A2 Device for maintaining a uniform temperature across the width of a hot-rolled strip |
| 10/25/1988 | US4779848 Cooling muff used in thermal processing method |
| 10/19/1988 | EP0287503A2 Method of and pressure cooling apparatus for cooling a continuous product |
| 10/19/1988 | EP0286984A1 Reheating furnace with rotating flame burners for slabs and billets |
| 10/19/1988 | CN88101735A Rotary hearth multi-chamber, multi-purpose furnace system |
| 10/19/1988 | CN87101136A Heat treatment method for perforating head |
| 10/18/1988 | CA1243200A1 Process and apparatus for direct softening heat treatment of rolled wire rods |
| 10/13/1988 | DE3737694C1 Verfahren zum Betrieb einer Induktions-Haertevorrichtung fuer Kurbelwellen und eine solche Vorrichtung Method for operating an induction Haertevorrichtung for crankshafts and apparatus |
| 10/12/1988 | CN87213414U Energy-saving vibrating-wave quenching device |
| 10/12/1988 | CN87205202U Multi-functional, high-speed spray quenching apparatus for steel tube |
| 10/06/1988 | WO1988007595A1 System for peripheral differential heat treatment to form dual-property workpieces |
| 10/06/1988 | WO1988007589A1 Rotary hearth multi-chamber multi-purpose furnace system |
| 10/06/1988 | DE3709650A1 Device for rapid, oxide-free cooling of heat-treated pipes |
| 10/05/1988 | EP0285128A2 Manufacturing method for high hardness member |
| 10/05/1988 | CN87107567A System for controlling temperature of running-conducter heating apparatus |
| 10/04/1988 | US4775430 Forming glass film on surface |
| 09/29/1988 | DE3709349A1 Process for tempering components |
| 09/28/1988 | EP0283869A2 Device to expose to a gas stream objects with flat surfaces in a position which can be traversed |
| 09/28/1988 | EP0222002A4 Alloy toughening method. |
| 09/27/1988 | CA1242409A1 Cast iron article and method of making same |
| 09/22/1988 | WO1988006940A1 Method of restoration of worn side surfaces of bushing-type parts |
| 09/21/1988 | EP0282860A2 Method and laying out for applying heat to the surface of a work piece |
| 09/21/1988 | EP0282822A1 Process for producing turbine wheels discs with locally raised internal stresses in the hub bore |
| 09/21/1988 | CN87101512A Microdeformational integral quenching technology and apparatus for thin-wall parts |
| 09/20/1988 | US4772338 Process and apparatus for improvement of iron loss of electromagnetic steel sheet or amorphous material |
| 09/14/1988 | CN88101145A Improved method of heat treating ferrous alloys |
| 09/13/1988 | US4770804 Thickening systems for high water based functional fluids and the high water based functional fluids containing these thickening systems |