| Patents for C21D 8 - Modifying the physical properties by deformation combined with, or followed by, heat treatment (18,654) |
|---|
| 10/30/1991 | CN1014501B Production of formable thin sheet excellent in ridging resistance |
| 10/29/1991 | US5061326 Method of making high silicon, low carbon regular grain oriented silicon steel |
| 10/29/1991 | US5061325 Method of producing high tension steel superior in weldability and low-temperature toughness |
| 10/29/1991 | US5061321 Optimization of descaling and intergranular corrosion |
| 10/29/1991 | US5060499 Rolling stand with multiple rolls supported as cantilevers for high-speed rolling |
| 10/29/1991 | CA1291400C Method of manufacturing extra-thick, high strength steel sheets |
| 10/23/1991 | EP0453284A2 Process for manufacturing double oriented electrical steel having high magnetic flux density |
| 10/22/1991 | US5058410 Method and apparatus fo producing thin wire, rod, tube, and profiles, from steels and alloys with low deformability, particularly hardenable steels |
| 10/21/1991 | WO1991016461A1 Method for producing steel wires for the manufacture of flexible ducts, steel wires thereby obtained and flexible ducts reinforced therewith |
| 10/17/1991 | WO1991015605A1 Method and apparatus for making card clothing |
| 10/16/1991 | EP0452153A2 Process for manufacturing double oriented electrical steel sheet having high magnetic flux density |
| 10/16/1991 | EP0452122A2 Method of producing grain oriented silicon steel sheets having less iron loss |
| 10/15/1991 | CA1290657C Method of directly softening rolled machine structural steels |
| 10/02/1991 | EP0449289A2 Method of manufacturing high permeability Fe-Ni system alloy |
| 10/01/1991 | US5053194 Improved fatigue resistance at welded joints |
| 09/24/1991 | US5051138 Quenching and solidification of melts of steel sheets, cold rolling and annealing |
| 09/17/1991 | US5049205 Decarburization, nitriding |
| 09/17/1991 | US5049204 Cold rolling, annealing |
| 09/17/1991 | US5048162 Manufacturing thin wall steel cartridge cases |
| 09/10/1991 | US5047096 Ferritic-martensitic stainless steel alloy with deformation-induced martensitic phase |
| 09/05/1991 | DE4017989A1 Improved hot rolling process on fixed rolling mill - has no final annealing, to increase hardness required |
| 09/04/1991 | CN1013739B Method of producing thin steel sheets having an improved processability |
| 09/03/1991 | US5045350 Applying tension to light gage grain-oriented silicon electrical steel of less than 7-mil by stress coating to reduce core losses. |
| 09/03/1991 | US5045129 Process for the production of semiprocessed non oriented grain electrical steel |
| 09/03/1991 | US5045124 Casting a melt, annealing, rolling |
| 09/03/1991 | US5044611 Automatic installation for the forming and thermal treatment of circular pieces |
| 08/27/1991 | US5042564 Method for the manufacture of formable steel |
| 08/22/1991 | WO1991012346A1 Process for producing steel wire for drawing |
| 08/22/1991 | WO1991012345A1 Thin sheet of iron-nickel alloy for shadow mask and production thereof |
| 08/21/1991 | EP0442864A1 Method and arrangement for rolling of rods and wires |
| 08/21/1991 | EP0205619B1 Method of manufacturing unidirectional silicon steel slab having excellent surface and magnetic properties |
| 08/20/1991 | US5041170 Rolling and stress-relieving annealing |
| 08/20/1991 | US5041167 Hot forging, then cooling a steel of carbon, silicon, molybdenum, manganese, chromium, vanadium, nitrogen, aluminum and iron ; crystal structure |
| 08/20/1991 | US5041166 Multistep process of hot and cold rolling and annealing at specified temperature ranges |
| 08/20/1991 | CA1287758C Pin for a fastener and method of making same |
| 08/14/1991 | EP0441674A1 Aluminising method for oriented magnetic steel plates and oriented magnetic steel sheets so obtained |
| 08/13/1991 | US5039359 Hot rolling, coiling, cold rolling, decarburizaiton, annealing |
| 08/07/1991 | EP0439464A1 A method and apparatus for correcting deviations in the shape of hardened metal objects |
| 08/06/1991 | US5037493 Method of producing non-oriented magnetic steel plate having high magnetic flux density and uniform magnetic properties through the thickness direction |
| 07/31/1991 | EP0438592A1 Production method of unidirectional electromagnetic steel sheet having excellent iron loss and high flux density |
| 07/31/1991 | CN1013350B Method of mfg. formable as-rolled thin steel sheets |
| 07/25/1991 | WO1991010752A1 Process for producing highly corrosion-resistant low-alloy steel for line pipe |
| 07/25/1991 | WO1991010517A1 METHOD OF MANUFACTURING Cr-Ni STAINLESS STEEL SHEET EXCELLENT IN SURFACE QUALITY AND MATERIAL THEREOF |
| 07/25/1991 | DE4023854C1 Steel wire prodn. - involves pre-drawing, heat treating and finishing |
| 07/25/1991 | CA2049050A1 Manufacturing method of high corrosion-resistant low-alloy steel for line pipes |
| 07/16/1991 | US5032195 FE-base shape memory alloy |
| 07/16/1991 | US5032190 Oxide dispersion strengthened |
| 07/16/1991 | CA1286209C Production of high strength seamless steel pipe with superior resistanceagainst sulfide stress corrosion cracking |
| 07/10/1991 | EP0436032A1 Method of producing high-strength stainless steel strip having duplex structure and excellent spring characteristics |
| 07/10/1991 | EP0435968A1 Process for manufacturing coil-break-free hot strip and age-resistant hot-galvanized cold strip. |
| 07/09/1991 | US5030298 Process for producing a hot rolled steel sheet with high strength and distinguished formability |
| 07/09/1991 | US5030297 Hot working, cooling, and tempering of an aluminum killed steel |
| 07/09/1991 | US5030296 Synchronous continuous casting and rapid cooling to minimize roping or unevengloss |
| 07/09/1991 | CA1285791C Ferritic stainless steel sheet or strip, namely for exhaust systems |
| 07/03/1991 | EP0434849A1 Method of producing steel sheets for porcelain enamelling having improved enamel adhesion property |
| 07/02/1991 | US5028386 Process for the production of tools |
| 07/02/1991 | US5028279 Roughening the surface, glass adheres to oxide layer which partially protrudes into steel sheet |
| 07/02/1991 | US5028275 Method of producing a liner to cover an explosive charge |
| 06/27/1991 | WO1991009144A1 Process for producing thin austenitic stainless steel plate and equipment therefor |
| 06/26/1991 | EP0434641A2 Process for the production of semiprocessed non oriented grain electrical steel |
| 06/26/1991 | EP0433786A1 Apparatus for processing grain-oriented electrical steel strip |
| 06/25/1991 | US5026439 Process for preparing wound core having low core loss |
| 06/25/1991 | US5026436 Stress corrosion cracking resistance, controlled heating, differential cooling of inner and outer surfaces; non-magnetizable drill stems and rod sections |
| 06/25/1991 | US5026435 Transformation of austenitic phase into work-induced martensitic phase; high strength, platability, solderability |
| 06/23/1991 | WO1991009933A1 Steel wire having a structure of the cold-drawn lower bainite type; method for producing such wire |
| 06/23/1991 | CA2069511A1 Steel wire having a structure of the cold-drawn lower bainite type and method for producing such wire |
| 06/19/1991 | EP0432732A2 Thermal flattening semi-processed electrical steel |
| 06/19/1991 | EP0432498A2 High tensile cold rolled steel sheet and high tensile not dip galvanized steel sheet having improved stretch flanging property and process for producing same |
| 06/19/1991 | EP0432434A1 Process for manufacturing joining structural parts from a fully austenitic Cr-Mn steel. |
| 06/12/1991 | EP0431502A2 Non-oriented electrical strip and method of manufacturing |
| 06/12/1991 | EP0431167A1 Production method of soft magnetic steel material |
| 06/12/1991 | CA2005466A1 Air-cooling duplex bainite-martensite steels |
| 06/05/1991 | EP0429651A1 Iron base, soft magnetic steel material |
| 05/29/1991 | EP0429094A1 High strength low carbon steels, steel articles thereof and method for manufacturing the steels |
| 05/29/1991 | CN1051764A Cold-rolled high tonsion steel strip having excellent stretching and folding properties, and molten zinc coating steel strip, and process for manufacturing same |
| 05/28/1991 | US5019191 Magnetic steel plate for use as a magnetic shielding member and a method for the manufacture thereof |
| 05/28/1991 | US5019182 Method of forming hard steels by case hardening, shot-peening and aging without tempering |
| 05/28/1991 | US5019181 Method of making stainless steel sheet for exterior building constituent |
| 05/28/1991 | US5019180 Method of manufacturing of high-strength seamless steel tubes |
| 05/21/1991 | US5017248 Hot rolled steel sheet with high strength and distinguished formability |
| 05/15/1991 | EP0426869A1 Process for manufacturing unidirectional silicon steel sheet excellent in magnetic properties |
| 05/08/1991 | EP0425768A1 Method of making stainless ferritic chromium comprising steel |
| 05/08/1991 | CN1051201A Prepn. of pumping rod without heat treatment |
| 05/07/1991 | US5013374 Permanent domain refinement by aluminum deposition |
| 05/07/1991 | US5013373 Method for treating electrical steel by electroetching and electrical steel having permanent domain refinement |
| 05/07/1991 | US5013372 Semi-process non-oriented electromagnetic steel strip having low core loss and high magnetic permeability, and method of making |
| 05/02/1991 | EP0424546A1 Process for manufacturing directional silicon steel sheet excellent in magnetic properties |
| 04/30/1991 | US5011548 Composition for deboronizing grain-oriented silicon steel |
| 04/24/1991 | EP0423623A1 Process for preparing wound core having low core loss |
| 04/24/1991 | EP0423378A1 Method of continuously drawing metal tubes |
| 04/24/1991 | EP0423331A1 Method of manufacturing non-oriented electromagnetic steel plates with excellent magnetic characteristics |
| 04/24/1991 | CN1050903A Process for improving cold formability of heat-treatable steels |
| 04/23/1991 | US5009726 Direct rolling without soaking |
| 04/23/1991 | US5009723 Method for manufacturing high strength non-magnetic stainless steel |
| 04/23/1991 | US5009396 Method and apparatus for the manufacture of formable steel strip |
| 04/17/1991 | EP0422574A1 High toughness stainless steels and the method of producing the same |
| 04/17/1991 | EP0422378A1 Method of improving the cold workability of hardenable steels |
| 04/17/1991 | EP0422223A1 Method of manufacturing non-oriented electromagnetic steel plates with excellent magnetic characteristics |
| 04/17/1991 | EP0422056A1 Process and installation for manufacturing a metal strip having a thickness less than or equal to 10 mm. |
| 04/13/1991 | CA2026307A1 Process for improving the cold formability of heat-treatable steels |