| Patents for C21D 8 - Modifying the physical properties by deformation combined with, or followed by, heat treatment (18,654) |
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| 04/10/1991 | EP0421087A2 Method of manufacturing a steel sheet |
| 04/03/1991 | EP0420238A2 Process for preparing unidirectional silicon steel sheet having high magnetic flux density |
| 04/02/1991 | US5003804 Method for pre-processing stainless steel strip intended to be cold-rolled |
| 03/27/1991 | EP0418506A1 Steel hardening method with liquid cooling media |
| 03/27/1991 | EP0418424A1 High strength non-oriented electrical steel sheet and method of manufacturing same |
| 03/26/1991 | US5002619 Method of producing Fe-Ni series alloys having improved effect for restraining streaks during etching |
| 03/20/1991 | EP0417699A2 Cold-rolled steel sheet for deep drawing and method of producing the same |
| 03/20/1991 | EP0417318A1 Method of producing rollable metal sheet based on quench-solidified thin cast sheet |
| 03/19/1991 | US5000801 Wrought stainless steel having good corrosion resistance and a good resistance to corrosion in seawater |
| 03/19/1991 | US5000797 Method for producing a stainless steel having a good corrosion resistance and a good resistance to corrosion in seawater |
| 03/19/1991 | US5000796 Anisotropic high energy magnets and a process of preparing the same |
| 03/13/1991 | EP0416420A2 Magnesium oxide coating for electrical steels and the method of coating |
| 03/13/1991 | EP0202339B1 Method of manufacturing unidirectional electromagnetic steel plates of low iron loss |
| 03/13/1991 | CN1011987B Process for production of double structure stainless cr-steel band having high strength, high ductility and low degree aeolotropy |
| 03/07/1991 | WO1991002827A1 Shape-memory stainless steel excellent in stress corrosion cracking resistance |
| 03/07/1991 | WO1991002823A1 Production method of unidirectional electromagnetic steel sheet having excellent iron loss and high flux density |
| 03/07/1991 | DE4010670A1 Heat treated steel with improved mechanical properties - has normalised skin around non-normalised ferrite-perlite core to give high strength steel for sections and reinforcing |
| 03/07/1991 | CA2024149A1 Heat-treated steel with improved mechanical and technological properties |
| 03/05/1991 | US4997493 Process for production of double-oriented electrical steel sheet having high flux density |
| 03/05/1991 | CA1280915C High strength and high toughness steel bar, rod and wire and the process of producing the same |
| 02/28/1991 | DE4015249A1 Mfg. coil-break-free hot rolled strip |
| 02/20/1991 | EP0413306A1 Method of producing non-oriented magnetic steel plate having high magnetic flux density |
| 02/20/1991 | EP0413163A1 Process and installation for producing thermomecanically treated rolled steel pieces |
| 02/19/1991 | US4994120 Process for production of grain oriented electrical steel sheet having high flux density |
| 02/19/1991 | US4994118 Process for the production of hot rolled steel or heavy plates |
| 02/12/1991 | US4992114 Process for producing grain-oriented thin electrical steel sheet having high magnetic flux density by one-stage cold-rolling method |
| 02/07/1991 | WO1991001385A1 Method of producing high-strength stainless steel strip having duplex structure and excellent spring characteristics |
| 02/06/1991 | EP0411356A2 Method of hot rolling continuously cast grain-oriented electrical steel slab |
| 02/06/1991 | CN1049032A Process for producing high strength stainless steel of duplex structure having excellent spring limit value |
| 02/05/1991 | US4990196 Process for manufacturing building construction steel having excellent fire resistance and low yield ratio |
| 01/30/1991 | EP0410521A1 Method and apparatus for manufacturing netting of steel wire |
| 01/29/1991 | US4988393 Method for producing high-strength steel having improved weldability |
| 01/23/1991 | EP0409389A2 Method and apparatus for refining the domain structure of electrical steels by local hot deformation and product thereof |
| 01/23/1991 | EP0409385A1 Method for domain refinement of oriented silicon steel by low pressure abrasion scribing |
| 01/22/1991 | US4986857 Hot working and heat treatment of corrosion resistant steels |
| 01/22/1991 | US4986341 Process for making non-oriented high silicon steel sheet |
| 01/20/1991 | WO1991001390A1 Method of manufacturing enameling steel sheet excellent in adhesiveness |
| 01/20/1991 | CA2036374A1 Method of producing steel sheets for porcelain enameling having improved enamel adhesion property |
| 01/20/1991 | CA2020160A1 Method and apparatus for refining the domain structure of electrical steels by local hot deformation and product thereof |
| 01/20/1991 | CA2020156A1 Method for domain refinement of oriented silicon steel by low pressure abrasion scribing |
| 01/16/1991 | EP0407764A1 Rolling stand with multiple rolls supported as cantilevers for highspeed rolling |
| 01/16/1991 | CN1048554A Production of grain-oriented silicon steel sheets having insulating film formed thereon |
| 01/15/1991 | US4985635 Method of producing extra-low iron loss grain oriented silicon steel sheets |
| 01/15/1991 | US4985090 Non-ageing low-alloy hot-rolled strip-form formable steel |
| 01/15/1991 | CA1278985C Grain-oriented silicon steel and stress coating therefor |
| 01/10/1991 | WO1991000602A1 Method for preparing permanent magnets based on neodymium-iron-boron |
| 01/10/1991 | WO1991000372A1 Pipe joint made of stainless steel and method of making the same |
| 01/09/1991 | EP0407275A1 Method of making workpieces, with excellent mechanical properties, from non-treated steel |
| 01/09/1991 | EP0406833A1 Production of grain-oriented silicon steel sheets having an insulating film formed thereon |
| 01/09/1991 | EP0406619A1 Process for producing galvanized, non-aging cold rolled steel sheets having good formability in a continuous galvanizing line |
| 01/09/1991 | EP0406237A1 Die-less drawing method and apparatus |
| 01/09/1991 | CN1011121B Cold rolled steel sheets having improved press formability |
| 01/08/1991 | CA1278776C Production of a taper rod |
| 01/03/1991 | DE4015248A1 Mfg. coil-break-free hot rolled strip |
| 01/02/1991 | EP0404937A1 Method of manufacturing non-oriented electromagnetic steel plates |
| 01/02/1991 | CN1048237A Iron-based soft magnetic material |
| 01/02/1991 | CN1048236A Manufacturing process for steels of soft magnetic |
| 01/01/1991 | US4981531 Process for producing cold rolled steel sheets having excellent press formability and ageing property |
| 12/27/1990 | WO1990016076A1 Iron base, soft magnetic steel material |
| 12/27/1990 | WO1990015886A1 Production method of soft magnetic steel material |
| 12/27/1990 | EP0403916A1 Method for production of ribbed reinforcing steel |
| 12/26/1990 | CN1048064A Process making super high-carbon steel for firebrick die |
| 12/25/1990 | US4979997 Heating, cold rolling, hot rolling, decarburization, and annealing |
| 12/25/1990 | US4979996 Low temerpature heating, nitriding runnign strip |
| 12/19/1990 | CN1010856B Process for production of double structure stainless cr-steel band having high strength, high ductility and low degree aeolotropy |
| 12/18/1990 | CA2020464A1 Soft magnetic steel materials of iron base |
| 12/17/1990 | CA2019187A1 Method of producing soft magnetic steel materials |
| 12/12/1990 | CN1047698A Cold molding reiforing process for low-carbon manganese niobium steel fastening parts |
| 12/12/1990 | CN1010752B Steel sheets for painting and method of producing the same |
| 12/05/1990 | EP0401098A1 Hot rolled magnetic steel sheet |
| 12/05/1990 | EP0400549A2 Process for producing grainoriented electrical steel sheet having superior magnetic and surface film characteristics |
| 12/04/1990 | US4975131 Comprising limited carbon, boron, silicon, manganese and at least one member selected from copper, sulfur, selenium, nickel, chromium, nitrogen, niobium and iron; crystal structure; corrosion resistance |
| 12/04/1990 | US4975127 Method of producing grain oriented silicon steel sheets having magnetic properties |
| 12/04/1990 | US4975124 Hot isostatic pressing without holding pressure at maximum |
| 11/28/1990 | EP0399054A1 Production method of crystal member having controlled crystal orientation |
| 11/28/1990 | EP0266422B1 Process for producing low core loss, thin, unidirectional silicon steel plate having excellent surface properties |
| 11/28/1990 | CN1047345A Heat treatment of corrosion resistant steels |
| 11/28/1990 | CN1010560B Rolling of base steel sheet to be surfacetreated without producing stretcher strain markings |
| 11/27/1990 | US4973368 Method of manufacturing steel elements designed to withstand high stress, such as roller bearing elements |
| 11/27/1990 | US4973367 Method of manufacturing steel sheet having excellent deep-drawability |
| 11/22/1990 | EP0398114A2 Process for preparation of thin grain oriented electrical steel sheet having superior iron loss and high flux density |
| 11/20/1990 | CA1276529C Method for producing an austenitic stainless steel plates showing highcorrosion resistance and high mechanical strength at ambient and elevated temperatures |
| 11/16/1990 | WO1990014445A1 Process for manufacturing directional silicon steel sheet excellent in magnetic properties |
| 11/15/1990 | WO1990013672A1 Process for manufacturing coil-break-free hot strip and age-resistant hot-galvanized cold strip |
| 11/15/1990 | DE4012960A1 Wire prodn. for material with carbon content over 0.035 per cent - involves applying thermally stable and mechanically loadable sepg. layer and drawing wire in one or more stages |
| 11/13/1990 | CA1276095C Method for softening rolled medium carbon machine structural steels |
| 11/09/1990 | WO1990013673A1 Process for manufacturing unidirectional silicon steel sheet excellent in magnetic properties |
| 11/06/1990 | US4968361 Method of domain refinement of oriented silicon steel by using flux-printing |
| 11/06/1990 | US4968357 Hot-rolled alloy steel plate and the method of making |
| 11/01/1990 | WO1990012897A1 Method of manufacturing non-oriented electromagnetic steel plates with excellent magnetic characteristics |
| 11/01/1990 | WO1990012896A1 Method of manufacturing non-oriented electromagnetic steel plates with excellent magnetic characteristics |
| 10/31/1990 | EP0395191A1 Method of and device for cooling a long cylindrical body |
| 10/31/1990 | EP0394696A1 Method of producing grain oriented electrical steel sheet having high magnetic flux density |
| 10/24/1990 | EP0393508A1 Process for producing grain-oriented electrical steel sheet having superior magnetic characteristic |
| 10/23/1990 | US4964926 Flat rolled; stabilized with titanium and niobium; improved high temperature resistance and strength; automotive exhausts |
| 10/23/1990 | US4964922 Forming transverse parellel spaced stripes |
| 10/23/1990 | US4964195 Metallic card clothing |
| 10/17/1990 | EP0392535A2 Process for preparation of grain-oriented electrical steel sheet having superior magnetic properties |
| 10/17/1990 | EP0392534A1 Method of producing oriented electrical steel sheet having superior magnetic properties |
| 10/16/1990 | US4963199 Drilling of steel sheet |