| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 03/17/1981 | US4256517 Steel composed of carbon, manganese, silicon, chromium and iron |
| 03/17/1981 | CA1097523A1 Cast steel roll for manufacturing float glass |
| 03/11/1981 | EP0024437A1 Process for producing non-aging cold-rolled steel sheets |
| 03/10/1981 | US4255205 Method of producing grain-oriented silicon steel sheets having substantially no glass film |
| 03/10/1981 | US4255136 Furnace for heat treatment of wire materials |
| 03/10/1981 | US4255133 Method for controlling furnace temperature of multi-zone heating furnace |
| 03/10/1981 | US4254944 Framework for a basket for heat treating at high temperatures, and a method for manufacturing the same |
| 03/10/1981 | CA1097197A1 Method of and apparatus for controlled cooling of metallurgical products |
| 03/04/1981 | EP0024317A1 Installation for cooling bars and profiles |
| 03/03/1981 | US4253868 Apparatus for nitriding metal materials and ferroalloys under pressure |
| 03/03/1981 | CA1096611A1 Continuous furnace |
| 02/25/1981 | EP0024124A1 Ferritic stainless steel and process for producing it |
| 02/24/1981 | US4252578 In bundles |
| 02/24/1981 | CA1096280A1 Method of producing silicon-iron sheet material with boron addition, and product |
| 02/11/1981 | EP0023546A1 Process and device for finishing the structure and/or surface of metals |
| 02/10/1981 | US4250374 Process and apparatus for the surface heat treatment of steel products by a laser beam |
| 02/10/1981 | US4250372 Process and apparatus for the heat treatment by high energy beams of surfaces of steel products |
| 02/10/1981 | US4249966 Method of forming a forsterite insulating film on the surface of a grain-oriented silicon steel sheet |
| 02/10/1981 | US4249724 Apparatus for tempering the surfaces of mutually displaced cams of a cast-iron camshaft |
| 02/10/1981 | US4249720 Apparatus for the continuous treatment of metal objects |
| 01/28/1981 | EP0009050A4 High strength steel and process of making. |
| 01/27/1981 | US4247284 Internal cooling of heat exchanger tubes |
| 01/27/1981 | US4246844 Method of forming high fragmentation mortar shells |
| 01/27/1981 | CA1094395A1 Process and apparatus for annealing can bodies |
| 01/21/1981 | EP0022707A1 Induction heating apparatus for long and thin products advancing continuously |
| 01/20/1981 | US4246046 Splits instead of fragmenting in case of failure |
| 01/20/1981 | US4245943 Unloading apparatus for vacuum electric furnaces |
| 01/20/1981 | US4245819 Apparatus for stabilizing springs |
| 01/20/1981 | US4245818 Apparatus for heat treatment of material to be worked on, especially of aluminum or magnesium alloys |
| 01/13/1981 | CA1093438A1 Method of treating aluminum-killed and low alloy steel strip surfaces in a sulfur-bearing atmosphere |
| 01/13/1981 | CA1093436A1 Annealing of wire |
| 01/07/1981 | EP0021865A1 Apparatus for cooling metal sheets or similar products |
| 01/07/1981 | EP0020937A1 Method of enhancing the magnetic properties of amorphous metal alloys |
| 01/07/1981 | EP0020357A1 Lower bainite alloy steel article. |
| 01/06/1981 | US4243441 Method for metal strip temperature control |
| 01/06/1981 | CA1092809A2 Rotary retort furnace |
| 12/30/1980 | US4242155 Method of forming an insulating film on a grain-oriented silicon steel sheet |
| 12/30/1980 | US4242154 Preheat and cleaning system |
| 12/30/1980 | US4242153 Methods for hot rolling and treating rod |
| 12/30/1980 | US4241903 Apparatus for heat treating elongated sheets |
| 12/30/1980 | CA1092496A1 Method for improving the surface quality of annealed steel strip |
| 12/23/1980 | US4240616 Apparatus for heat-treating metallic material |
| 12/23/1980 | CA1091922A1 Rotary retort furnace |
| 12/16/1980 | US4239483 Method of controlling steel strip temperature in continuous heating equipment |
| 12/16/1980 | CA1091482A1 Process and apparatus for sequentially forming and treating steel rod |
| 12/10/1980 | EP0020246A1 Cooling device for hot rolled elongate laminated products |
| 12/09/1980 | US4238119 Steel wire heat treatment equipment |
| 12/09/1980 | US4237717 Method of manufacturing rollers |
| 12/02/1980 | US4236551 Method of and apparatus for cooling rolled wire |
| 12/02/1980 | CA1090682A1 Method of heat tretment of ductile metal strip |
| 12/02/1980 | CA1090620A1 Heat treatment for ball bearing steel |
| 12/02/1980 | CA1090564A1 Immersion cooling apparatus for hot metal pipes |
| 11/28/1980 | EP0020357A4 Lower bainite alloy steel article. |
| 11/25/1980 | US4235591 Continuous flow oven |
| 11/25/1980 | CA1090122A1 Method and apparatus for effecting uniform heat transfer in an industrial furnace |
| 11/18/1980 | CA1089936A1 Induction heating apparatus for metallic sheet of various widths |
| 11/13/1980 | WO1980002434A1 Surface hardening of metals by electric arc discharge |
| 11/12/1980 | EP0018703A2 Camshaft manufacturing process |
| 11/12/1980 | EP0018379A1 Process for putting into operation a furnace with movable supports |
| 11/04/1980 | US4231812 Surface treatment of metal strip |
| 11/04/1980 | US4231553 Apparatus for cooling rapidly moving rolled material |
| 11/04/1980 | US4231382 Cooling strand for cooling small-section steel |
| 11/04/1980 | CA1088747A1 Preheating furnace |
| 10/29/1980 | EP0018059A1 Apparatus for and method of heating and cooling metal products |
| 10/29/1980 | EP0017830A1 Slab heating furnace |
| 10/29/1980 | EP0017695A1 Process for improving the strength of a wire |
| 10/28/1980 | US4230506 Heat treating gray cast iron |
| 10/28/1980 | US4230488 Abrasion resistant rails and/or rail wheels, and process for producing the same |
| 10/21/1980 | US4229236 Stress relieving |
| 10/21/1980 | US4229235 Passing coolant through inside or pipe while heating outside, stress relieving |
| 10/21/1980 | US4229162 Closure apparatus for a slab furnace and method of heating slabs therein |
| 10/21/1980 | CA1087965A1 Processing for cube-on-edge oriented silicon steel |
| 10/15/1980 | EP0016846A1 Process for producing high-strength cold-rolled steel plate for press working |
| 10/14/1980 | US4227945 Method for preventing decarburization of steel materials |
| 10/14/1980 | US4227923 Plastic molding steel having improved resistance to corrosion by halogen gas |
| 10/14/1980 | US4227874 Temperature resistant, structurally stable member |
| 10/14/1980 | CA1087503A1 Method of treating wire rod |
| 10/07/1980 | US4226645 Hydrogen sulfide stress cracking resistance, aluminum-killed, rolling, austenitizing, quenching to martensite |
| 10/07/1980 | US4226106 Plants for treating rolled steel products |
| 10/01/1980 | EP0016049A1 Process and device for manufacturing hardened surfaces by second fusion of a part comprising variable radius of curvature, in particular of cames of a came shaft in internal combustion machines |
| 09/30/1980 | US4225366 Recrystallization annealing |
| 09/30/1980 | US4225306 Method of controlling a heating furnace for steel ingots |
| 09/30/1980 | US4225121 Energy efficient heat-treating furnace system |
| 09/30/1980 | CA1086497A1 Vertical direct fired strip heating furnaces |
| 09/23/1980 | US4223877 Annealing furnace |
| 09/17/1980 | EP0015373A1 Annealing box |
| 09/16/1980 | US4222799 High-strength spring steel and its manufacturing process |
| 09/16/1980 | CA1085611A1 Method for enhancing the heating efficiency of continuous slab reheating furnaces |
| 09/09/1980 | US4221947 Annealing of wire |
| 09/09/1980 | US4221832 Coating with metal |
| 09/04/1980 | WO1980001811A1 Process for producing non-aging cold-rolled steel plate |
| 09/03/1980 | EP0015154A1 Method of producing bearing cups by deep drawing |
| 09/02/1980 | US4220106 Process and apparatus for annealing can bodies |
| 09/02/1980 | CA1085023A1 Process for manufacturing forge-welding steel pipe |
| 09/02/1980 | CA1084823A1 Treatment of rolled steel products |
| 09/02/1980 | CA1084818A1 Silicon steel and processing therefore |
| 08/26/1980 | US4219371 Process for producing high-tension bainitic steel having high-toughness and excellent weldability |
| 08/26/1980 | US4219355 Iron-metalloid amorphous alloys for electromagnetic devices |
| 08/19/1980 | US4217769 Method of forming a coating application roll |
| 08/12/1980 | CA1083467A1 Method of stabilising springs and apparatus or equipment therefor |