| Patents for C21D 9 - Heat treatment, e.g. annealing, hardening, quenching, tempering, adapted for particular articles; Furnaces therefor (30,082) |
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| 05/31/1990 | DE3839983A1 Recipient hood for annealing furnaces |
| 05/31/1990 | DE3839773A1 Continuous casting installation with a downstream rolling mill |
| 05/30/1990 | EP0370916A1 Furnace for reheating, holding and storing of metallurgical products |
| 05/30/1990 | EP0370674A1 Drill screw |
| 05/30/1990 | EP0370588A1 Method for producing high-strength seamless steel pipes |
| 05/30/1990 | EP0370575A1 Method for the manufacture of formable steel |
| 05/30/1990 | EP0370542A1 Sealing element for feeding through at least one elongated object such as wire and a vacuum apparatus provided with one or more of such sealing elements |
| 05/29/1990 | CA1269595A1 Opener-disk heat-treating process |
| 05/29/1990 | CA1269594A1 Process for manufacturing pearlitic steel wire |
| 05/25/1990 | CA2003834A1 Steel products heating, keeping and accumulating oven |
| 05/22/1990 | CA1269418A1 Multi-wire induction heating |
| 05/22/1990 | CA1269256A1 Method of producing hot-rolled strip having a dual- phase structure |
| 05/17/1990 | DE3838315A1 Process for treating a cylinder block |
| 05/16/1990 | EP0368638A1 Method of producing a high-strength coil spring |
| 05/16/1990 | CN1008027B Method of manufacturing a shadow mask, shadow mask manufastured according to such a method, and colour display tube comprising such a shadow mask |
| 05/16/1990 | CA2001578A1 Sealing elements for feeding through at least one elongated object such as wire and a vacuum apparatus provided with one or more of such sealing element |
| 05/15/1990 | US4925390 Apparatus for retaining the configuration of an aperture formed through a coil |
| 05/15/1990 | CA1268957A1 Method for producing rolled steel products, particularly threaded steel tension members |
| 05/09/1990 | EP0367360A2 Process for manufacturing seamless pressure vessels |
| 05/09/1990 | EP0366862A1 Hardening installation comprising a low-induction suspension gear |
| 05/08/1990 | US4924062 Method for hardening discrete identical elements integral with a common structure and regularly separated from each other and device for embodying this method |
| 05/08/1990 | US4923528 Method for manufacturing rolled steel products |
| 05/08/1990 | US4923396 Method and apparatus for heating a strip of metallic material in a continuous annealing furnace |
| 05/08/1990 | CA1268825A1 Articulated armature device for inductive heating of elongated moving objects |
| 05/02/1990 | EP0366639A2 Device for cooling a moving cylindrical member |
| 05/02/1990 | CN2056740U 加热炉 Furnace |
| 04/26/1990 | DE3926571C1 Inductor head for piston engines - consists of inductor loop following periphery of cylinder around radial laminated yokes |
| 04/24/1990 | US4919733 Method for refining magnetic domains of electrical steels to reduce core loss |
| 04/24/1990 | US4919395 Apparatus for heat treating a continuously moving metal wire |
| 04/24/1990 | US4919177 Rearranging crystal orientation; heat, electric current, elongation, cooling |
| 04/24/1990 | US4918806 Heat treating to form nitride film on surface |
| 04/24/1990 | US4918803 Plant for rolling long products from billets and blooms coming from a plurality of continuous casting lines |
| 04/24/1990 | CA2001183A1 Apparatus for cooling a cylindrical member in linear motion |
| 04/17/1990 | US4917738 Improved creep rupture strengths |
| 04/17/1990 | US4917600 Reciprocal furnace for heating metal parts |
| 04/17/1990 | US4917358 Apparatus for producing electrical steel core laminations |
| 04/11/1990 | CN2055824U 钢球淬火机 Ball hardening machine |
| 04/10/1990 | US4915750 Annealing, electron beam treatment |
| 04/10/1990 | US4915749 Method of reducing iron loss of grain oriented silicon steel sheet |
| 04/10/1990 | US4915361 Treatment apparatus for parts |
| 04/05/1990 | WO1990003244A1 Method and apparatus for continuous in-line annealing of amorphous strip |
| 04/04/1990 | EP0361058A1 Furnace plant to heat and reheat strip |
| 04/04/1990 | EP0360955A2 Process for producing a cold rolled steel sheet having a good ageing resistance by continuous annealing |
| 04/03/1990 | US4913751 Higher strength steel, especially reinforcing steel or drawing shop feed stock with improved material properties and improved processability |
| 04/03/1990 | US4913749 Process for case-hardening rolling bearing elements of low-alloy nickeliferous steel |
| 04/03/1990 | US4913748 Vertical accumulator furnace |
| 04/03/1990 | US4913747 Method of and apparatus for heat-treating rails |
| 04/03/1990 | US4913650 Apparatus for the heat treatment of a continuously advanced metal wire |
| 03/29/1990 | DE3931195A1 Bright annealing of steel strip coils - by adjusting inert gas flow rate to correspond to emulsion evaporation |
| 03/28/1990 | EP0360115A2 Improvements in and relating to piston rings |
| 03/28/1990 | EP0359756A1 Rotary hearth multi-chamber multi-purpose furnace system |
| 03/27/1990 | US4911415 Holder for the partial heat treatment of tools in furnaces |
| 03/22/1990 | WO1990002615A1 Production method of stainless thin steel sheet having excellent surface luster and high corrosion resistance |
| 03/22/1990 | DE3831910A1 Continuous furnace for elongate products |
| 03/21/1990 | EP0359279A2 Method for rapid direct cooling of a hot-rolled wire rod |
| 03/20/1990 | US4909866 High strength spring and its process of manufacturing |
| 03/20/1990 | US4909485 Apparatus for continuously annealing metal strip and hearth roll therefor |
| 03/14/1990 | EP0358362A1 Method for the manufacture of alloy railway rails |
| 03/14/1990 | EP0357797A1 Process for producing nonoriented electric steel sheet having excellent magnetic properties in lowly magnetic field |
| 03/13/1990 | US4908073 Method of producing a cold rolled steel sheet having a good ageing resistance and small anisotropy and adapted for deep drawing |
| 03/13/1990 | CA1266602A1 Method and apparatus for cooling steel strips |
| 03/07/1990 | EP0215032B1 Process and installation to permit the assembly line thermo-mechanical working, with little deformation of workpieces; also application of the process |
| 03/07/1990 | CN2054039U Programmable heat treating facility |
| 03/06/1990 | US4906305 Method of making a composite drawn article |
| 03/06/1990 | US4906184 Long life cover for heat chamber |
| 03/06/1990 | US4905538 Camshaft |
| 03/06/1990 | CA1266512A1 Electromagnetic induction heating apparatus including a magnetic flux diverting assembly |
| 02/28/1990 | EP0356417A1 Process for manufacturing stress corrosion crack-resistant tubular bodies, particularly non-magnetizable austenitic steel drill collars, and bodies obtained thereby |
| 02/28/1990 | EP0355520A2 Method of heat treating workpieces |
| 02/28/1990 | CN1040057A High-tensile steel, in particular concrete steel or drawed preformative material, with improved material properties and good workability |
| 02/27/1990 | US4904302 Roller in rotary compressor and method for producing the same |
| 02/21/1990 | EP0355046A2 Composite material and method of making |
| 02/21/1990 | CN1039743A Plant to roll flat products |
| 02/20/1990 | US4902354 High temperature electric arc furnace and method |
| 02/20/1990 | US4902342 Method for the manufacture of non-allergy creating precious metal objects |
| 02/14/1990 | CN1006812B Process for making vulnerable parts of grain and oil machinery |
| 02/13/1990 | US4900376 Hardening a cylindrical hollow object preferably made of steel |
| 02/08/1990 | DE3912916A1 Process for producing a casting from lamellar-graphite cast iron and camshaft produced thereby |
| 02/07/1990 | EP0354127A1 Bell-type furnaces, in particular for annealing metallic coils in a controlled atmosphere |
| 02/07/1990 | EP0353487A1 Plant to roll flat products |
| 02/06/1990 | US4899024 Method for treating large cast iron dies, particularly for vehicle-sheet metal pressing |
| 02/06/1990 | US4898629 Low tensile strength; austenite transc ferrite formation starting with coiling |
| 02/06/1990 | US4898628 Hot working method for producing grain oriented silicon steel with improved glass film formation |
| 02/06/1990 | US4898627 Ultra-rapid annealing of nonoriented electrical steel |
| 02/06/1990 | US4898626 Pretreatment of cold rolling and decarbonization; improved core loss for stress relieving annealing |
| 02/06/1990 | CA1265421A1 Method and apparatus for cooling rolled steels |
| 02/06/1990 | CA1265420A1 Process for making internally hardened tubes |
| 02/06/1990 | CA1265419A1 Heat treatment with an autoregulating heater |
| 01/31/1990 | EP0352533A2 Device for the transport of strip metal, particularly high grade strip metal, in the furnaces of annealing or pickling lines |
| 01/31/1990 | CN1039265A Method for producing roller chain with low-carbon low-alloy steel |
| 01/30/1990 | CA1265210A1 Normalizer for linear welds of pipes |
| 01/25/1990 | DE3824415A1 Cooling hood for rapid cooling of red-hot material, in particular steel strip |
| 01/24/1990 | CN1039062A Process and apparatus for obtaining homogeneous austenite structure |
| 01/23/1990 | US4895700 Alloy steel; high strength, controlled hardenability |
| 01/23/1990 | US4895605 Steel, heat treatment |
| 01/18/1990 | DE3909117C1 Induction hardening installation |
| 01/18/1990 | DE3824011A1 Method for the production of a rim base |
| 01/17/1990 | CN1038842A Reinforcement process of tool and die steel with steel tipped structure |
| 01/17/1990 | CN1038778A Automatic apparatus of forming and heat treatment of circular pieces |
| 01/16/1990 | US4894501 Method and apparatus for induction heating of gear teeth |