| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 03/14/1978 | US4079224 Method for preventing brittle fracture of steel pipe structures |
| 03/14/1978 | US4079157 Method of fabrication of distortion-resistant material |
| 03/07/1978 | US4077814 Method for thermally treating metal components |
| 02/28/1978 | US4076222 Runout cooling method and apparatus for metal rolling mills |
| 02/21/1978 | US4075041 Combined mechanical and thermal processing method for production of seamless steel pipe |
| 02/07/1978 | US4072543 Dual-phase hot-rolled steel strip |
| 01/24/1978 | US4070209 Method of producing a high pressure fuel injection pipe |
| 01/24/1978 | US4070147 Method and apparatus for post-weld heat treating a tank |
| 01/24/1978 | US4069595 Arrangement for conveying web material through a treating plant |
| 01/17/1978 | US4069070 Free manganese |
| 01/17/1978 | US4069069 Method for improving the surface quality of annealed steel strip |
| 01/17/1978 | US4069008 Method and apparatus for heating a workpiece |
| 01/17/1978 | US4069007 Rotary retort furnace |
| 01/10/1978 | US4067754 Cold rolled, ductile, high strength steel strip and sheet and method therefor |
| 01/03/1978 | US4066477 Method of maintaining temperature of salt bath during quenching of steel wire |
| 12/27/1977 | US4065329 Continuous heat treatment of cold rolled steel strip |
| 12/27/1977 | US4065252 Spray mist cooling arrangement |
| 12/27/1977 | US4065251 Furnaces |
| 12/27/1977 | US4065249 Heater for billets |
| 12/13/1977 | US4062705 Method for heat treatment of high-toughness weld metals |
| 12/13/1977 | US4062701 Method of forming end flanges |
| 12/13/1977 | US4062700 Method for producing a steel sheet with dual-phase structure composed of ferrite- and rapidly-cooled-transformed phases |
| 12/13/1977 | US4062528 Device for direct annealing of metal wire leaving an operating machine |
| 12/13/1977 | US4062504 Apparatus for continuously accumulating a travelling metal strip or wire-like material |
| 11/22/1977 | US4059399 Cooled tunnel-furnace with ground effect |
| 11/15/1977 | US4058414 Automobiles |
| 11/01/1977 | US4056412 Quenching |
| 11/01/1977 | US4056351 Workpiece-engaging element for furnaces |
| 10/25/1977 | US4055333 Apparatus for heat treating work |
| 10/18/1977 | US4054770 Induction heating of strip and other elongate metal workpieces |
| 10/18/1977 | US4054276 Process and apparatus for cooling hot rolled steel rod |
| 10/18/1977 | US4054044 Seals for the passage of wire between regions of different pressure |
| 10/04/1977 | US4052235 Method of preventing oxidation during water quenching of steel strip |
| 10/04/1977 | US4052234 Method for continuously quenching electrolytic tin-plated steel strip |
| 09/27/1977 | US4050963 Method of quenching large-diameter thin-wall metal pipe |
| 09/27/1977 | US4050959 Process of making a high strength cold reduced steel sheet having high bake-hardenability and excellent non-aging property |
| 09/20/1977 | US4049372 Apparatus for supporting and removing a work supporting roll |
| 09/20/1977 | US4049186 Process for reducing stress corrosion in a weld by applying an overlay weld |
| 09/13/1977 | US4047985 Method and apparatus for symmetrically cooling heated workpieces |
| 09/06/1977 | US4046604 Method for continuously quenching electrolytic tin-plated steel strip while preventing quench stains |
| 09/06/1977 | US4046603 Process for the continuous hardening of tubes |
| 09/06/1977 | US4046600 Method of producing large diameter steel rods |
| 09/06/1977 | US4046599 Processing wire rod |
| 09/06/1977 | US4046598 Procedure for manufacture of steel band or strip |
| 08/23/1977 | US4043847 Hardening process for crankshafts |
| 08/23/1977 | US4043170 Patenting process and apparatus combined with a wire |
| 08/16/1977 | US4042515 Dimeric carboxylic acids in mineral oil |
| 08/16/1977 | US4042423 Method for providing strong wire and strip |
| 08/16/1977 | US4042422 Method for forming bearing unit |
| 08/16/1977 | US4042227 Method and apparatus for continuously homogenizing and quenching aluminum billets |
| 08/09/1977 | US4040873 Method of making low yield point cold-reduced steel sheet by continuous annealing process |
| 08/09/1977 | US4040688 Hot rolled sorbitic carbon steel wire |
| 08/02/1977 | US4039354 Method of making Belleville springs |
| 08/02/1977 | US4039148 Conveying device for long articles within heat treatment furnaces |
| 07/26/1977 | US4038109 Three phase heat treatment of steel sheet |
| 07/19/1977 | US4036243 Apparatus for cooling hot slabs |
| 07/12/1977 | US4035202 Annealing treatment for controlling warhead fragmentation size distribution |
| 07/12/1977 | US4035142 Continuous heating furnace for elongated metal ingots |
| 07/12/1977 | US4035141 Support rail for furnaces |
| 07/05/1977 | US4033737 Method of cooling a steel material without deformation |
| 06/28/1977 | US4032369 Method for quenching ferrous tubing to achieve full hardening without quench cracking |
| 06/28/1977 | US4032366 Grain-oriented silicon steel and processing therefor |
| 06/21/1977 | US4030951 Method of hardening saw teeth |
| 06/21/1977 | US4030950 Process for cube-on-edge oriented boron-bearing silicon steel including normalizing |
| 06/21/1977 | US4030944 Annealing, austenization, hot-working |
| 06/14/1977 | US4029832 Method for producing an adhesive-coated high-strength steel reinforcing member |
| 06/14/1977 | US4029526 Method of flame hardening gears |
| 06/14/1977 | US4029524 Heat treating process for a rod within a fluidized bed |
| 05/31/1977 | US4026732 Method for induction hardening gear teeth |
| 05/31/1977 | US4026731 Multistage, multizonal |
| 05/31/1977 | US4026729 Method of making a soft steel sheet by continuous annealing |
| 05/24/1977 | US4025298 Walking beam furnace for round bar and the like |
| 05/24/1977 | US4025297 Rotary retort furnace |
| 05/24/1977 | US4025061 Apparatus for heat treatment of discrete metallic commodities |
| 05/24/1977 | US4024745 Rod cooling and coiling system |
| 05/17/1977 | US4023989 Method for producing corded steel wire |
| 05/17/1977 | US4023988 Heat treatment for ball bearing steel to improve resistance to rolling contact fatigue |
| 05/17/1977 | US4023987 Method of producing soft thin steel sheet by continuous annealing |
| 05/17/1977 | US4023392 Method and apparatus for cooling hot rolled rod |
| 05/10/1977 | US4022570 Warm form cooling and heat recovery tunnel |
| 05/03/1977 | US4021272 Method of isothermal annealing of band steels for tools and razor blades |
| 04/26/1977 | US4019446 Rail girder for soaking-pit cover |
| 04/12/1977 | US4017708 Method and apparatus for heat treating an internal bore in a workpiece |
| 04/12/1977 | US4017338 Steel member for reinforcing rubber composites and method of making same |
| 04/12/1977 | US4016740 Method and an apparatus for the manufacture of a steel sheet |
| 04/05/1977 | US4016009 Producing rolled steel products |
| 03/15/1977 | US4012028 Furnace of a continuous metal strip heat-treatment plant |
| 03/15/1977 | US4011899 Steel member for reinforcing rubber compositions and method of making same |
| 03/15/1977 | US4011780 Apparatus for trimming and/or subdividing mill product at a coil forming station |
| 03/08/1977 | US4011110 Method and apparatus for forming and treating bundles of steel rods |
| 03/08/1977 | US4011109 Method for producing steel filaments |
| 03/01/1977 | US4010050 Processing for aluminum nitride inhibited oriented silicon steel |
| 03/01/1977 | US4009869 Apparatus for treatment of rolled wire |
| 02/15/1977 | US4008078 Carbon-silicon-manganese-niobium-nitrogen-aluminum-iron |
| 02/08/1977 | US4007351 System for installing high strength steel belts |
| 01/25/1977 | US4004789 Tunnelized burner for panel type furnace |
| 01/18/1977 | US4003763 Method of and plant for patenting steel wire bundles |
| 01/11/1977 | US4002509 Steel, hot rolling, heat treatment |
| 01/04/1977 | US4001054 Process for making metal pipe |
| 01/04/1977 | US4000887 Device for low-warp hardening of annular sealing members |