| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 01/04/1977 | US4000625 Method of cooling a moving strand of hot material |
| 12/14/1976 | US3997376 Spray mist cooling method |
| 12/14/1976 | US3997375 Steel hardening method |
| 12/14/1976 | US3997374 Heat treatment of welds |
| 12/07/1976 | US3995684 Apparatus for the direct cooling of a strand |
| 11/30/1976 | US3994752 Annealing treatment for controlling warhead fragmentation size distribution |
| 11/30/1976 | US3994750 Method of producing abrasion resistant plastification elements for injection molding machines |
| 11/30/1976 | US3994678 Heater for billets |
| 11/30/1976 | US3994670 Furnace heating |
| 11/23/1976 | US3993086 Device for cooling band coils in hot rolling strip mills |
| 11/16/1976 | US3992231 Quenching |
| 11/16/1976 | US3991986 Fluid quench housing assembly with external flow adjustment |
| 11/16/1976 | US3991450 Method of separating apertured shadow mask flats after annealing |
| 11/02/1976 | US3989923 Wire heat treating apparatus |
| 11/02/1976 | US3988955 Coated steel product and process of producing the same |
| 10/26/1976 | US3988106 Sickle blade heater |
| 10/19/1976 | US3986898 Copper-silicon alloy |
| 10/12/1976 | US3985583 Method for forming an insulating coating on an oriented silicon steel sheet |
| 09/28/1976 | US3982968 Method for the manufacture of a cold-rolled steel strip in thin and super-thin metal plate thickness for producing stretch-formed cans or other deep-drawn parts |
| 09/28/1976 | US3982885 Method and arrangement for inhomogeneous annealing of small parts |
| 09/21/1976 | US3981754 Scale prevention |
| 09/14/1976 | USRE28964 Ultrahigh strength steels |
| 09/14/1976 | US3980506 Process for manufacturing highly wear-resistant, undistorted, axially symmetrical parts |
| 09/14/1976 | US3980467 Method of operating a batch type annealing furnace using a plasma heat source |
| 09/07/1976 | US3979231 Method for producing large diameter steel pipes |
| 08/31/1976 | US3977029 Box spring assembly with coated wire components |
| 08/24/1976 | US3976520 Pipe and process for producing a welded and quench hardened steel |
| 08/17/1976 | US3975610 Welding |
| 08/17/1976 | US3975145 Open coil heat shielding |
| 08/17/1976 | US3974564 Surface hardened steel cutting blade |
| 08/10/1976 | US3973999 Method for producing a high tensile strength and high toughness bend pipe |
| 08/10/1976 | US3973426 Method of cooling steel wire |
| 08/03/1976 | US3972751 Method of heat treating ferrous workpieces |
| 07/27/1976 | US3971679 Method of annealing oriented silicon steel |
| 07/13/1976 | US3969158 Heat treatment |
| 06/29/1976 | US3967089 Apparatus for the inductive hardening of workpieces rotatable around a rotational axis |
| 06/29/1976 | US3966509 Method for reducing carbon deposits during box annealing |
| 06/22/1976 | US3964938 Method and apparatus for forming high tensile steel from low and medium carbon steel |
| 06/22/1976 | US3964737 Belleville spring |
| 06/22/1976 | US3964734 Apparatus for thermally treating metal components |
| 06/15/1976 | US3963531 Carbon-manganese-niobium-aluminum-iron |
| 06/15/1976 | US3962898 Apparatus for the manufacture of wire |
| 06/08/1976 | US3961514 Twist drawn wire, process and apparatus for making same |
| 06/01/1976 | US3959858 Bridge top stop for slide fasteners |
| 05/25/1976 | US3958918 Method for elimination of furnace roll pickup marks on silicon containing sheet steel |
| 05/25/1976 | US3958796 Quench-hardening of pipes |
| 05/25/1976 | US3958439 Method for recovering ductility of a cold rolled metal strip |
| 05/18/1976 | US3957257 Hardening apparatus with a hardening tank, especially in hardening machines for crankshafts |
| 05/18/1976 | US3956989 Fragmentation device |
| 05/11/1976 | US3956029 Annealing separator for heat treatment of silicon steel sheets |
| 05/11/1976 | US3955390 Twist drawn wire, process and apparatus for making same |
| 05/04/1976 | US3954516 Method for enhancing the drawability of low manganese steel strip |
| 05/04/1976 | US3954133 Spheroidal graphite cast iron pipe of ferritic structure and method of producing the same |
| 04/27/1976 | US3953247 Method for heat treatment of material to be worked on, especially of aluminium or magnesium alloys |
| 04/27/1976 | US3952568 Vacuum processing of rod, wire or strip material |
| 04/20/1976 | US3951696 Method for producing a high-strength cold rolled steel sheet having excellent press-formability |
| 04/13/1976 | US3950192 Hydrocarbon gas |
| 04/06/1976 | US3948786 Insulative coating for electrical steels |
| 04/06/1976 | US3948595 Apparatus for the high temperature annealing of metallic coils |
| 04/06/1976 | US3948428 Device for cooling welds |
| 03/30/1976 | US3946817 Differentially carburized rock bit cutter |
| 03/30/1976 | US3946583 Method and apparatus for improving fatigue strength in weld zones |
| 03/23/1976 | US3945623 Device for cooling metal wire |
| 03/23/1976 | US3945483 Device for treating production parts, especially for inductive hardening of the parts |
| 03/16/1976 | US3944446 Method of inductively heating and quench hardening camshafts |
| 03/16/1976 | US3944444 Method for heat treating cylindrical products |
| 03/09/1976 | US3942943 Gravity flow discrete article gas flow isolated thermal treatment device |
| 03/09/1976 | US3942659 Cradle hearth oven |
| 03/02/1976 | US3941623 Method for producing a grain-oriented electrical steel sheet using separators comprising metal nitrides |
| 03/02/1976 | US3941611 Apparatus for cooling strip like material |
| 03/02/1976 | US3940967 Apparatus for controlled cooling hot rolled steel rod in direct sequence with rod mill |
| 03/02/1976 | US3940961 Apparatus for cooling hot rolled steel rod by forced air convection or by supplying heat |
| 02/17/1976 | US3939296 Annealing furnace base plate supports |
| 02/17/1976 | US3939015 In-line heat treatment of hot-rolled rod |
| 02/10/1976 | US3937448 Apparatus for hardening steel pipes |
| 02/03/1976 | US3936543 Method of coating carbon steel |
| 02/03/1976 | US3936324 Carbon-silicon-manganese-iron alloy |
| 01/27/1976 | US3935416 Inductor-workpiece position detector |
| 01/13/1976 | US3932238 Method and apparatus for quenching pipe |
| 01/13/1976 | US3932237 Method for forming an insulating glass film on surfaces of an oriented silicon steel sheet |
| 01/13/1976 | US3932234 Method for manufacturing single-oriented electrical steel sheets comprising antimony and having a high magnetic induction |
| 01/06/1976 | US3930900 Process for cooling hot rolled steel rod |