| Patents for C21D 6 - Heat treatment of ferrous alloys (4,815) |
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| 11/13/1990 | US4969957 Method of producing a mechanical component with superior fatigue strength |
| 11/13/1990 | CA1276095C Method for softening rolled medium carbon machine structural steels |
| 10/30/1990 | US4966668 Method for the treatment of metal objects |
| 10/23/1990 | US4964924 Papermaking |
| 10/23/1990 | US4964922 Forming transverse parellel spaced stripes |
| 10/23/1990 | CA1275377C High energy ball milling method for making rare earth- transition metal-boron permanent magnets |
| 09/25/1990 | US4959273 Corrosion-resistant permanent magnet and method for preparing the same |
| 09/19/1990 | EP0388393A1 Method of treating rolled strip |
| 09/12/1990 | EP0386728A1 Martensitic stainless steels excellent in corrosion resistance and stress corrosion cracking resistance and method of heat treatment of the steels |
| 08/29/1990 | EP0384317A1 Martensitic stainless steel and method of heat treatment of the steel |
| 08/23/1990 | WO1990009459A1 Method for thermal treatment of high-speed steel |
| 08/23/1990 | DE3905347A1 Method for providing erosion protection for turbine blades |
| 08/21/1990 | US4950337 Magnetic and mechanical properties of amorphous alloys by pulse high current |
| 08/21/1990 | US4950335 Process for producing articles for magnetic use |
| 08/07/1990 | US4946516 Heating, hot rolling, quenching and tempering a slab composed of carbon, silicon, manganese, nickel, molybdenum, chromium, a luminum and iron at controlled temperatures |
| 08/07/1990 | US4946515 Noncracking |
| 06/19/1990 | US4935074 Magnetic material comprising iron, boron and a rare earth metal |
| 06/06/1990 | EP0371202A1 High strength martensitic steel alloy and method of preparing same |
| 05/22/1990 | US4927468 Process for making a martensitic steel alloy fuel cladding product |
| 05/15/1990 | CA1269029A1 Permanent magnet manufacture from very low coercivity crystalline rare earth-transition metal-boron alloy |
| 05/10/1990 | DE3837980A1 Heat treatment process for improving the resistance of hardenable steels of high chromium content to pitting and intergranular corrosion by the application of double hardening |
| 05/02/1990 | EP0366646A1 Process for producing a clad moulded body |
| 05/01/1990 | US4921551 Permanent magnet manufacture from very low coercivity crystalline rare earth-transition metal-boron alloy |
| 04/24/1990 | US4919177 Rearranging crystal orientation; heat, electric current, elongation, cooling |
| 04/11/1990 | EP0362812A2 Bonded isotropic R-Fe-B-magnet and method for making it |
| 04/11/1990 | CN1007521B Permanent magnet made from the rare-earth with very low coercive force transition metal, boron alloy |
| 04/04/1990 | EP0361308A1 Corrosion-resistant permanent magnet and method for preparing the same |
| 03/20/1990 | CA1266790A1 Process for production of high-hardness, hardened and tempered special steel and special steel alloy |
| 03/07/1990 | CN1007099B High energy ball grinding method for mfg. permanent magnet of rare earth-transition metal-boron |
| 03/06/1990 | US4906306 Amorphous metal-metal composite article, a method for producing the same, and a torque sensor using the same |
| 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 | EP0356279A1 Process for the obtention of a transparent magnetic material with a high resistance |
| 02/27/1990 | US4904447 Low thermal expansion casting alloy having excellent machinability |
| 02/22/1990 | DE3927310A1 Etch stripe-resistant iron-nickel alloy prodn. - by continuous casting and heat treatment |
| 02/20/1990 | US4902472 High strength stainless steel |
| 02/07/1990 | EP0353699A1 Method of heat-treating a high-alloy chromium steel |
| 01/17/1990 | CN1038841A Deep cooling treatment and the chemical process of nickel-phosphorus-rare earth plating |
| 01/10/1990 | CN1038672A Treatment for inhibiting irradiation induced stress corrasion cracking in austenitic stainless steel |
| 01/03/1990 | EP0348952A2 Method for manufacturing steel article having high magnetic permeability and low coercive force |
| 12/27/1989 | EP0347512A1 A bimetal construction roll for reducing and finishing stands in a rolling mill train |
| 12/20/1989 | EP0347130A1 Treatment for inhibiting irradiation induced stress corrosion cracking in austenitic stainless steel |
| 12/20/1989 | EP0346547A1 Method for processing cold-rolled stainless-steel sheet and strip |
| 12/19/1989 | US4888068 Rare earth elements, iron, cobalt, boron alloy; sintering, annealing, controlled heating and cooling |
| 11/29/1989 | EP0343292A1 Low thermal expansion casting alloy |
| 11/28/1989 | CA1263294A1 Heat treated high strength bimetallic cylinder |
| 11/23/1989 | EP0343008A2 Heat treatment of corrosion resistant steels |
| 11/21/1989 | US4881991 Tough, corrosion resistance |
| 11/21/1989 | US4881989 Fe-base soft magnetic alloy and method of producing same |
| 11/07/1989 | US4878962 Treatment for inhibiting irradiation induced stress corrosion cracking in austenitic stainless steel |
| 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 | WO1989010620A1 Ferromagnetic materials |
| 10/03/1989 | US4871511 Rocket motor casing |
| 09/27/1989 | EP0334478A2 Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically-aligned material |
| 09/26/1989 | CA1260366A1 Method of forming magnetostrictive rods from rare earth-iron alloys |
| 09/12/1989 | US4865658 Oxygen-containing ferromagnetic amorphous alloy and method of preparing the same |
| 09/12/1989 | US4865657 Annealing in two stages, at different temperature, under vacuum and under hydrogen, to promote order-disorder reaction |
| 09/08/1989 | WO1989008318A1 Magnetically anisotropic sintered magnets |
| 09/05/1989 | US4863530 Fc-Pt-Nb permanent magnet with an ultra-high coercive force and a large maximum energy product, and method for producing the same |
| 08/22/1989 | US4859410 Die-upset manufacture to produce high volume fractions of RE-Fe-B type magnetically aligned material |
| 08/09/1989 | EP0327042A1 Maraging steel |
| 08/08/1989 | US4854979 Method for the manufacture of an anisotropic magnet material on the basis of Fe, B and a rare-earth metal |
| 08/08/1989 | US4854978 Heat treatment to volatilize high vapor pressure elements |
| 07/25/1989 | US4851058 Boron, praseodymium, neodymium, and iron |
| 07/18/1989 | US4849034 Thermal treatment for increasing magnetostrictive response of rare earth-iron alloy rods |
| 07/11/1989 | US4846904 Manganese, nickel, chromium, molybdenum |
| 07/11/1989 | US4846900 Process for the production of a compresssed gas container made of austenitic steels by cryodeformation |
| 06/28/1989 | EP0322397A2 High speed steel prepared by powder metallurgy, wear-resistant part prepared thereby and process for its manufacture |
| 06/28/1989 | EP0130221B1 Process for producing corrosion-resistant alloy steel |
| 06/21/1989 | CN1033494A Hard magnetic material of rare earth metal, iron and carbon |
| 06/20/1989 | CA1256004A1 Method for pearlitic rail steels |
| 06/14/1989 | EP0320064A1 Hard magnetic material of a rare earth metal, iron and carbon |
| 06/13/1989 | US4838960 Heating to partial austenite phase; cooling, tempering |
| 06/07/1989 | EP0318875A1 Process for rejuvenating the ductility of brittle amorphous alloys |
| 06/06/1989 | US4837094 Radiation transparency, electrical resistance |
| 05/30/1989 | US4834811 Method of manufacturing, concentrating, and separating enhanced magnetic parameter material from other magnetic co-products |
| 04/25/1989 | US4824636 Austenitic steel with improved high-temperature strength and corrosion resistance |
| 04/25/1989 | US4824536 Induction annealing, electrolysis descaling |
| 04/25/1989 | US4824492 Method for producing a precipitation hardenable martensitic low alloy steel forging |
| 04/25/1989 | US4824491 Process for the production of a strip of a chromium stainless steel of a duplex structure having high strength and elongation as well as reduced plane anisotropy |
| 04/19/1989 | EP0312063A1 Thermal treatment for increasing magnetostrictive response of rare earth-iron alloy rods |
| 04/11/1989 | CA1252311A1 Special steels and their method of preparation |
| 04/05/1989 | EP0310416A2 Timepiece |
| 03/29/1989 | CN1032073A Apparatus and method for deep cryogenic treatment of materials |
| 03/21/1989 | US4814139 Permanent magnet having good thermal stability and method for manufacturing same |
| 03/21/1989 | US4814027 Fe-Pt-Nb permanent magnet with an ultra-high coercive force and a large maximum energy product |
| 03/14/1989 | US4812181 Method of achieving a flat magnetization loop in amorphous cores by heat treatment |
| 03/14/1989 | US4812176 Hot and cold rolling |
| 03/07/1989 | US4810312 Treatment of superalloy surfaces |
| 03/01/1989 | EP0305038A2 Method of annealing an aperture shadow mask for a colour cathode ray tube |
| 02/15/1989 | EP0303016A1 Method of making a gas pressure vessel of austenitic stainless steel by cryogenic forming |
| 02/15/1989 | EP0302947A1 Rare earth element-iron base permanent magnet and process for its production |
| 02/01/1989 | EP0301168A1 Apparatus and method for the deep cryogenic treatment of materials |
| 01/26/1989 | DE3737836A1 Hochkorrosionsbestaendiger austenitischer nichtrostender stahl und verfahren zu seiner herstellung Hochkorrosionsbestaendiger austenitic stainless steel and process for its preparation |
| 12/28/1988 | EP0297004A2 Use of a Process for improving the ductility of a product made from a martensitic transformation alloy |
| 12/21/1988 | EP0295779A2 Method of manufacturing, concentrating, and separating enhanced magnetic parameter material from other magnetic co-products |
| 12/20/1988 | CA1246902A1 High-strength alloy for industrial vessels |
| 11/30/1988 | EP0293286A1 Method and device for manufacturing articles for magnetic use |
| 11/30/1988 | EP0293165A2 Martensitic stainless steel of subzero treatment hardening type |
| 11/01/1988 | US4781754 Rapid solidification of plasma sprayed magnetic alloys |