| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 05/29/1991 | EP0429328A1 Stock room for metallurgical products |
| 05/29/1991 | DE4007852C1 Withdrawal device in heat-treatment plant - has grip of parallel bars with rollers positioned between them |
| 05/29/1991 | CN1012685B Method for forming black oxidized film on the surface of a sheet metal |
| 05/28/1991 | US5019180 Method of manufacturing of high-strength seamless steel tubes |
| 05/28/1991 | US5018707 Heating furnace |
| 05/28/1991 | US5018706 Apparatus for inhibiting stress corrosion cracking |
| 05/23/1991 | DE4010309C1 Maintenance of annealing temp. even after stoppage - involves measuring speed of wire and tacho:generator output voltage to produce control signal for thyristor |
| 05/21/1991 | US5017761 Fiber-optic heater probe assembly for heat treating metallic conduits |
| 05/21/1991 | US5016860 "No-nick" part-handling apparatus and method |
| 05/15/1991 | EP0427359A2 Method of and device for accelerated cooling of a cylindrical metal tube |
| 05/15/1991 | EP0426935A2 Process for hot working article defining hole at the center thereof |
| 05/15/1991 | EP0426903A1 Procedure for the treatment of the surface of a metal receptacle and receptacle treated according to this procedure |
| 05/14/1991 | US5015828 System and method for stress-relief of welds in heat exchanger tubes |
| 05/14/1991 | US5015539 Welded bimetallic strips for saw blades |
| 05/14/1991 | US5014760 Steel wire for reinforcing elastomer articles with improved adhesion promoting layer |
| 05/14/1991 | US5014412 Strip casting installation with rotary hearth furnace and method for producing hot-rolled steel strip therefrom |
| 05/08/1991 | EP0426561A1 Plant for reheating and rolling long workpieces |
| 05/08/1991 | EP0425863A1 Heat treatment of drive shafts |
| 05/08/1991 | EP0425768A1 Method of making stainless ferritic chromium comprising steel |
| 05/08/1991 | CN2076662U Low-voltage direct heating tube type resistance furnace |
| 05/08/1991 | CA2029467A1 Method of shape control of rail during accelerated cooling |
| 05/07/1991 | US5013374 Permanent domain refinement by aluminum deposition |
| 05/07/1991 | US5013370 Method of analyzing cracking at welded joints |
| 05/02/1991 | DE3935929A1 Convective heat treatment unit for e.g. semi-finished wire - uses gas steam for rapid cooling of wire positioned transverse to flow in venturi-line guide |
| 05/01/1991 | CN2076106U Cooling-controlled continuous heat treatment apparatus |
| 04/30/1991 | US5012066 Method of and apparatus for manufacturing eyeless suture needle |
| 04/24/1991 | EP0423623A1 Process for preparing wound core having low core loss |
| 04/23/1991 | US5009396 Method and apparatus for the manufacture of formable steel strip |
| 04/23/1991 | US5009395 Method and apparatus for selectively heating a workpiece subjected to low temperature thermomechanical processing |
| 04/23/1991 | US5009092 Coiler arrangement |
| 04/23/1991 | US5009001 Method of increasing the fatigue strength of crankshafts |
| 04/23/1991 | US5009000 Overcoating steel plunger with boronized case; heating; quenching |
| 04/23/1991 | CA1283287C Fluidised bed installation |
| 04/18/1991 | DE4031378A1 Expansion joint for wall of electric furnace - has stack of disc springs which exert force tending to close joint |
| 04/17/1991 | EP0422607A1 Furnace for baking coating powder |
| 04/17/1991 | EP0422353A2 Furnace for the partial thermic treatment of tools |
| 04/17/1991 | EP0422056A1 Process and installation for manufacturing a metal strip having a thickness less than or equal to 10 mm. |
| 04/17/1991 | CN2075206U Soaking pit cap with spring hanger |
| 04/17/1991 | CN2075205U Low-temp. tempering heat treating furnace for cutter soldering |
| 04/17/1991 | CN1050747A Depressant of pb-zn dust |
| 04/16/1991 | US5008514 Method and apparatus for heating a metallic elongated product |
| 04/16/1991 | US5008073 Mn-B steel alloy composition |
| 04/16/1991 | US5007824 Skid mark erasure system |
| 04/16/1991 | US5007165 Method of producing a cam shaft |
| 04/11/1991 | DE3929145C1 Solid copper inductor for surface hardening workpieces - is split into 2 halves with power supplied to both fixed and movable halves, and is equipped with cooling channels |
| 04/09/1991 | US5006064 Furnace seal |
| 04/09/1991 | US5006061 Method for bringing a plurality of steel slabs to rolling temperature in a furnace |
| 04/04/1991 | WO1991004109A1 Method of cooling hot-rolled sheet |
| 04/03/1991 | EP0419999A1 Method for working friction stressed surfaces in internal combustion engines |
| 04/03/1991 | CN1050409A Method and device for hot-treatment of deformation at joint of friction welding |
| 04/02/1991 | US5004510 Heat Treatment |
| 04/02/1991 | US5004213 Leaf-spring hardener |
| 04/02/1991 | CA1282288C Oxidation resistant ferrous base foil |
| 03/28/1991 | DE4003363C1 Hardening rails from rolling temp. - using appts. with manipulator engaging rail from exit roller table with support arms positioned pivotably on each side |
| 03/27/1991 | WO1991005071A1 Oxidation treatment apparatus for metal pipes |
| 03/27/1991 | CN1012144B Cold-rolled steel sheets and a method of manufacturing the same |
| 03/27/1991 | CA2067095A1 Oxidation treatment apparatus for metal pipes |
| 03/26/1991 | US5002009 Furnace for formation of black oxide film on the surface of thin metal sheet and method for formation of black oxide film on the surface of shadow mask material by use of said furnace |
| 03/26/1991 | CA1281974C Steel strip cooling method |
| 03/21/1991 | WO1991003576A1 Process and device for the intermediate heating of a forged piece |
| 03/21/1991 | DE4009770A1 Coolant stripping device for rolled prods. - includes air blowing channel feeding into guide section just before widened funnel section |
| 03/20/1991 | WO1991004345A1 Processes and devices for the heat treatment of metal wires by bringing them around capstans |
| 03/20/1991 | EP0418166A1 Roll contact cooling device for continuous quenching of preheated steel strip |
| 03/20/1991 | CN2073572U Micro-oxidation infrared energy-saving resistance furnace |
| 03/20/1991 | CN1050045A Technology and equipment used for heating of blank material of spring |
| 03/20/1991 | CA2065316A1 Processes and devices for the heat treatment of metal wires by bringing them around capstans |
| 03/19/1991 | US5000798 Method for shape control of rail during accelerated cooling |
| 03/19/1991 | US5000681 Apparatus and process for simultaneously positioning and oscillating a plurality of probes in the heat exchanger tubes of a nuclear steam generator |
| 03/19/1991 | CA1281794C Method of cooling hot-rolled steel plate |
| 03/14/1991 | DE4009771A1 End piece for cooling channel of rolling mill - having perpendicular air channel for blowing coolant away from rolled product surface |
| 03/14/1991 | DE4009742A1 Coolant water stripper device for rolled prodn. - has line of water stripper dice arranged behind cooling tube |
| 03/14/1991 | DE3929754A1 Verfahren und anordnung zum zwischenwaermen eines schmiedestuecks Method and arrangement for schmiedestuecks zwischenwaermen a |
| 03/13/1991 | EP0416420A2 Magnesium oxide coating for electrical steels and the method of coating |
| 03/13/1991 | EP0416356A2 Device for producing steel strip |
| 03/13/1991 | EP0416239A1 Procedure for the fabrication of a crunkshaft or a corresponding structural component |
| 03/13/1991 | CN1049868A Process and apparatus for heat treatment of at least one metal wire by using heat-conducting plate |
| 03/13/1991 | CN1011982B Steel strip continuous treatment production line with open fire furnace |
| 03/12/1991 | US4999166 Enamelled Copper Wire |
| 03/08/1991 | CA2024749A1 Plant for manufacturing steel strip |
| 03/07/1991 | WO1991002823A1 Production method of unidirectional electromagnetic steel sheet having excellent iron loss and high flux density |
| 03/07/1991 | WO1991002603A1 Method and device for regulating the temperature of metal strip during its hot rolling |
| 03/07/1991 | DE3929829A1 Heat treatment cooling for cylindrical steel parts and containers - has part in continuous variable speed rotation sprayed with water at varying rate to maintain precise temp. gradient |
| 03/06/1991 | EP0415611A1 Method for detecting roller breakdowns in roller hearth kiln systems |
| 03/06/1991 | EP0233944B1 Continuous strip steel processing line having direct firing furnace |
| 03/05/1991 | US4997077 Method and apparatus for the positioning of slabs |
| 03/05/1991 | CA1280915C High strength and high toughness steel bar, rod and wire and the process of producing the same |
| 02/28/1991 | DE4019635A1 Resistance heat treating of a ferromagnetic amorphous strip - using alternating or pulsed current with direct current magnetic field to improve magnetic properties |
| 02/27/1991 | CN1011801B Heat treatment equipment and quenching technology for rails |
| 02/21/1991 | DE3926975A1 Secure hoist mountings on steel heat treatment unit - has segmented support ring to accommodate thermal stresses and various design for attaching mountings to mantle's tank top |
| 02/20/1991 | EP0413181A2 Stress relief of metals |
| 02/20/1991 | EP0413169A1 Production line for making steel plate |
| 02/20/1991 | CN1049379A Long-life measure of an active ebv st 45.8/iii furnace steel pipe of gfr |
| 02/20/1991 | CN1049378A Deoxidising agent for manufacture of steel with converters |
| 02/20/1991 | CN1049303A Method for cooling hot-rolling sheets |
| 02/20/1991 | CN1011706B Heat treatment method for perforating head |
| 02/19/1991 | CA1280340C Process for preventing transverse displacement of metal strip |
| 02/18/1991 | CA2023431A1 Method for purifying low molecular weight compounds of peptide or pseudo-peptide structure |
| 02/12/1991 | US4992112 Gripper, sluicer valve |
| 02/12/1991 | US4992111 Bearing race member and method of fabrication |
| 02/12/1991 | CA1280190C Method and system for controlling tension to be exerted on metal strip in continuous annealing furnace |