| Patents for C21D 8 - Modifying the physical properties by deformation combined with, or followed by, heat treatment (18,654) |
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| 04/17/1990 | US4917969 Corrosion resistance |
| 04/17/1990 | US4917738 Improved creep rupture strengths |
| 04/11/1990 | EP0198024B1 Method for producing prestressed steel |
| 04/11/1990 | CN1007521B Permanent magnet made from the rare-earth with very low coercive force transition metal, boron alloy |
| 04/10/1990 | US4915900 Free-cutting steel having high fatigue strength |
| 04/10/1990 | US4915750 Annealing, electron beam treatment |
| 04/10/1990 | US4915749 Method of reducing iron loss of grain oriented silicon steel sheet |
| 04/05/1990 | WO1990003244A1 Method and apparatus for continuous in-line annealing of amorphous strip |
| 04/05/1990 | DE3840812A1 Verfahren und anlage zur kontinuierlichen herstellung von stahlband oder stahlblech nach dem stranggussverfahren Method and system for the continuous production of steel strip or sheet steel for the continuous casting process |
| 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 |
| 03/27/1990 | US4911766 Method of refining magnetic domains of electrical steels using phosphorus |
| 03/22/1990 | WO1990002615A1 Production method of stainless thin steel sheet having excellent surface luster and high corrosion resistance |
| 03/20/1990 | US4909864 Forming insulative coating of a phosphate and colloidal silica; annealing with electron beam |
| 03/20/1990 | US4909058 Method of controlled rod or wire rolling of alloy steel |
| 03/14/1990 | EP0357800A1 Process for producing nonoriented silicon steel sheet having excellent magnetic properties |
| 03/14/1990 | EP0357797A1 Process for producing nonoriented electric steel sheet having excellent magnetic properties in lowly magnetic field |
| 03/14/1990 | EP0357796A1 Process for producing nonoriented electric steel sheet |
| 03/14/1990 | EP0357794A1 Process for pickling electrical steel sheet |
| 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 |
| 03/06/1990 | US4906530 Grain oriented electromagnetic steel sheets having a very low iron loss |
| 03/06/1990 | US4906305 Method of making a composite drawn article |
| 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 | CN1040057A High-tensile steel, in particular concrete steel or drawed preformative material, with improved material properties and good workability |
| 02/27/1990 | US4904527 Lamination for use in transformers or the like and method of making the same |
| 02/27/1990 | US4904314 Method of refining magnetic domains of barrier-coated electrical steels using metallic contaminants |
| 02/27/1990 | US4904313 Method of producing stable magnetic domain refinement of electrical steels by metallic contaminants |
| 02/27/1990 | US4904312 Mild acid; heat resistance; reduced power loss |
| 02/27/1990 | CA1266306A1 High-strength conductors and process for manufacturing same |
| 02/21/1990 | EP0355046A2 Composite material and method of making |
| 02/20/1990 | US4902472 High strength stainless steel |
| 02/20/1990 | US4901550 Manufacturing method of extra fine wire |
| 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 |
| 01/31/1990 | EP0352597A1 Process for producing hot-rolled strip or heavy plates |
| 01/30/1990 | US4897131 Grain-oriented electrical steel sheet having improved glass film properties and low watt loss |
| 01/25/1990 | WO1990000454A1 PROCESS FOR PRODUCING THIN Cr-Ni STAINLESS STEEL SHEET EXCELLENT IN BOTH SURFACE QUALITY AND QUALITY OF MATERIAL |
| 01/23/1990 | US4895700 Alloy steel; high strength, controlled hardenability |
| 01/23/1990 | CA1264646A1 Hot rolling method and apparatus for hot rolling |
| 01/17/1990 | CN1038778A Automatic apparatus of forming and heat treatment of circular pieces |
| 01/11/1990 | WO1990000100A1 Process and installation for manufacturing a metal strip having a thickness less than or equal to 10 mm |
| 01/10/1990 | EP0349853A2 Method of producing non-oriented magnetic steel heavy plate having high magnetic flux density |
| 01/10/1990 | EP0148957B1 Steel plated with molten aluminum excellent in high-temperature oxidation resistance and high-temperature strength and process fo r its production |
| 01/09/1990 | US4892595 Method of forming high quality mold pin insert |
| 01/03/1990 | EP0348952A2 Method for manufacturing steel article having high magnetic permeability and low coercive force |
| 12/26/1989 | US4889567 High strength and high toughness steel bar, rod and wire and the process of producing the same |
| 12/20/1989 | EP0347156A2 Process for manufacturing building construction steel having excellent fire resistance and low yield ratio, and construction steel obtained thereby |
| 12/20/1989 | CN1006121B Method for rolling and heat treating small diameter stainless steel rod |
| 12/19/1989 | US4888066 Method for producing grain-oriented electrical steel sheet with very high magnetic flux density |
| 12/13/1989 | EP0345937A1 Method of refining magnetic domains of electrical steels |
| 12/13/1989 | EP0345936A1 Method of refining magnetic domains of electrical steels |
| 12/06/1989 | EP0345206A1 Method of producing thick plate |
| 12/06/1989 | EP0345103A1 Process and installation for in-line homogenizing and recrystallization of continuously cast metallic products |
| 12/05/1989 | US4885042 Method and apparatus for preliminary treatment of stainless steel for cold rolling |
| 12/05/1989 | US4885041 Hot rolling slab from casting machine, cooling, more rolling, coiling |
| 12/05/1989 | CA1263588A1 Method of forming high-strength corrosion-resistant steel |
| 11/30/1989 | WO1989011549A1 PRODUCTION OF NON-ORIENTED HIGH-Si STEEL SHEET |
| 11/30/1989 | WO1989011363A1 Process for continuous production of steel strip or steel sheet from flat products made by the circular-arc type continuous casting process |
| 11/30/1989 | DE3817242A1 Producing fine steel sheet or tin plate for drink prodn. - by hot rolling to sheet, coiling cold rolling recrystallisation annealing and dressage rolling |
| 11/28/1989 | US4883545 Grain size gradient |
| 11/28/1989 | US4883544 Process for preparation of austenitic stainless steel having excellent seawater resistance |
| 11/23/1989 | EP0343008A2 Heat treatment of corrosion resistant steels |
| 11/16/1989 | WO1989010806A1 A method and apparatus for correcting deviations in the shape of hardened metal objects |
| 11/08/1989 | EP0341146A1 Automatic apparatus for the shaping and heat treatment of circular work pieces |
| 11/08/1989 | EP0340747A2 Method of and device for improving the coating quality of bar-shaped metallic products |
| 11/07/1989 | US4878959 Casting, hot rolling, cold working, annealing, refractory coating |
| 11/07/1989 | US4878955 Heat treatment, martensite and minute austenite crystal structure |
| 11/07/1989 | US4878954 Cycles of hot and cold working |
| 11/02/1989 | EP0339475A2 High-flux density, grain-oriented electrical steel sheet having highly improved watt loss characteristic and process for preparation thereof |
| 11/02/1989 | EP0339474A1 Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics |
| 10/31/1989 | US4877463 Method for producing rolled steel products, particularly threaded steel tension members |
| 10/31/1989 | US4877462 Oil tempering, descaling, phosphate treatment, cold working |
| 10/25/1989 | EP0338682A2 Method of strengthening metal material and apparatus therefor |
| 10/24/1989 | US4875947 Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property |
| 10/17/1989 | US4874644 Variable strength materials formed through rapid deformation |
| 10/10/1989 | US4872923 Changing microstructure by controlled heating, cooling, stretching during elongation |
| 10/10/1989 | CA1262226A1 Method for producing steel bars having improved low temperature toughness and steel bars produced thereby |
| 10/04/1989 | CN1036043A Alloy composition and method of forming drive axle shafts |
| 10/03/1989 | US4871402 Separating-agent composition and method using same |
| 09/27/1989 | EP0334224A2 Ultra-rapid annealing of nonoriented electrical steel |
| 09/27/1989 | EP0334223A2 Ultra-rapid heat treatment of grain oriented electrical steel |
| 09/27/1989 | EP0334222A1 Permanent domain refinement by aluminum deposition |
| 09/27/1989 | EP0334221A2 Method for treating electrical steel by electroetching and electrical steel having permanent domain refinement |
| 09/27/1989 | CN1035853A Components and production technology of high-magnetism oriented silicon steel |
| 09/26/1989 | CA1260367A1 Method of manufacturing pressure vessel steel with high strength and toughness |
| 09/26/1989 | CA1259827A1 Cold-rolled steel sheets and a method of manufacturing the same |
| 09/21/1989 | WO1989008729A1 Process for pickling electrical steel sheet |
| 09/21/1989 | WO1989008722A1 Method of manufacturing non-oriented electromagnetic steel plates |
| 09/21/1989 | WO1989008721A1 Process for producing nonoriented electric steel sheet |
| 09/21/1989 | WO1989008720A1 Process for producing nonoriented electric steel sheet |
| 09/20/1989 | EP0333221A2 Process for producing grain-oriented thin electrical steel sheet having high magnetic flux density by one-stage cold-rolling method |
| 09/20/1989 | EP0332745A1 Manufacturing method for the casing of an explosive charge |
| 09/19/1989 | US4867807 Fine grain |
| 09/19/1989 | US4867788 Powder metallurgy process |
| 09/13/1989 | EP0332284A1 Low grade material axle shaft |
| 09/13/1989 | EP0332041A2 Processing grain oriented electrical steel |
| 09/12/1989 | US4865664 Amorphous alloy strips having a large thickness and method for producing the same |