| Patents for C22C 33 - Making ferrous alloys (11,268) |
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| 09/05/1990 | CN1045132A Method for manufacturing molten metal containing ni and cr |
| 09/05/1990 | CN1009472B Protective tip for titanium alloy turbine blade |
| 09/04/1990 | US4954171 Composite alloy steel powder and sintered alloy steel |
| 09/04/1990 | US4954058 Method for making composite sintered apex seal material |
| 08/29/1990 | EP0384397A1 Method for manufacturing molten metal containing Ni and Cr |
| 08/29/1990 | CN1009375B Productive method for particulate si-p-fe alloy |
| 08/28/1990 | CA1273232A1 Oxygen containing permanent magnet alloy |
| 08/22/1990 | EP0383035A2 Iron-silicon alloy powder magnetic cores and method of manufacturing the same |
| 08/22/1990 | CN1044768A Sintered coating for porous metallic filter surfaces |
| 08/22/1990 | CN1009283B Cast-iron used for glass bottle mould |
| 08/16/1990 | EP0381812A1 Sintered coating for porous metallic filter surfaces |
| 08/08/1990 | EP0380715A1 Abrasion resistant composite casting and production method thereof |
| 08/08/1990 | CN1009116B Rare-earth grey cast iron waste water pipe |
| 08/07/1990 | US4946499 Heating a mixture of ferrous powder and an alloying powder with metal soap or wax and oil |
| 08/01/1990 | EP0379583A1 SINTERED MAGNETIC Fe-Co MATERIAL AND PROCESS FOR ITS PRODUCTION |
| 08/01/1990 | CN1008983B Powder delivering device for rare-earth alloys by injection method |
| 07/31/1990 | CA1272049A1 High strength powder metal parts |
| 07/25/1990 | EP0378925A1 Powdered steel for cold processing tool |
| 07/25/1990 | EP0378744A1 Method and apparatus for adding shot to molten steel |
| 07/25/1990 | EP0378702A1 Sintered alloy steel with excellent corrosion resistance and process for its production |
| 07/24/1990 | US4943321 High strength, wear resistance |
| 07/11/1990 | EP0377307A1 Powdered high speed tool steel |
| 06/27/1990 | CN1008542B Method for manufacturing mo-iron from mo ore |
| 06/26/1990 | US4937041 Forming metallization layer of flectro-conductive and noble metals |
| 06/26/1990 | US4936912 Sintered apex seal material |
| 06/26/1990 | US4936911 Cold work steel |
| 06/20/1990 | CN1043162A Cast iron strong graphited inoculant |
| 06/19/1990 | US4935266 Process and material for producing corrosion-resistant layers |
| 06/19/1990 | US4935074 Magnetic material comprising iron, boron and a rare earth metal |
| 06/19/1990 | US4935054 Through a chute to mouth of furnace |
| 06/19/1990 | CA1270374A1 Method for the production of a wear resistant part of a soil working tool |
| 06/14/1990 | WO1990006198A1 Iron-based powder for producing sintered components |
| 06/13/1990 | CN1043034A Method of manufacturing permanent magnet |
| 06/12/1990 | US4933008 Matrix of alloy steel or high speed tool steel having metal component dispersed therein |
| 06/06/1990 | EP0371840A1 Free cutting mild steel and process for manufacturing same |
| 06/06/1990 | EP0371299A1 Method for manufacturing low carbon ferrochrome with high chromium content |
| 06/06/1990 | CN1042735A Method of producing general-purpose steel |
| 06/06/1990 | CA2004625A1 Iron-based powder for the manufacture of sintered components |
| 05/30/1990 | CN1042571A Technology for alloying of cast-iron |
| 05/23/1990 | EP0369217A2 Magnetic material, method of producing the same, and magnetic head |
| 05/23/1990 | CN1008119B Niobium slag alloying additive and its use in steel smelting |
| 05/22/1990 | US4927461 Machinable-grade, ferrous powder blend containing boron nitride and method thereof |
| 05/22/1990 | US4927457 Method of manufacturing low carbon ferro-chromium |
| 05/17/1990 | WO1990005197A1 Method of obtaining spheroidal graphite cast iron |
| 05/16/1990 | CN1042186A Method for regulating nodulizing rate of ductile iron in front of furnace |
| 05/16/1990 | CN1007992B Method of adjusting graphite form of creeping nodular cast iron by sulfur contg materials |
| 05/15/1990 | US4925502 Iron-cobalt type soft magnetic material |
| 05/15/1990 | US4925501 Expolosive compaction of rare earth-transition metal alloys in a fluid medium |
| 05/15/1990 | CA1269029A1 Permanent magnet manufacture from very low coercivity crystalline rare earth-transition metal-boron alloy |
| 05/15/1990 | CA1268967A1 Sintered shrink-on cam and process of manufacturing such cam |
| 05/11/1990 | CA2002790A1 Method for manufacturing low carbon ferrochrome with high chromium content |
| 05/09/1990 | EP0367159A2 Magnetic recording medium comprising acicular alloy magnetic powder |
| 05/09/1990 | EP0366900A1 Sintered alloy containing carbide |
| 05/02/1990 | CN1007826B Inhibitor of globular or nodular graphites in creeping graphite cast iron and its use method |
| 05/02/1990 | CN1007825B Multielement modificator |
| 05/01/1990 | US4921665 Using a finer powder |
| 05/01/1990 | US4921551 Permanent magnet manufacture from very low coercivity crystalline rare earth-transition metal-boron alloy |
| 05/01/1990 | US4921410 Working at a temperature higher than plasticity transition temperature of alloy but less than crystallization temperature |
| 04/25/1990 | EP0365506A2 Method of making a hard material in the area between cemented carbide and high speed steel |
| 04/25/1990 | EP0365079A1 Method of manufacturing a permanent magnet |
| 04/24/1990 | US4919719 Consisting of carbon, nickel, cobalt and iron and hard phase dispersed in matrix; valve seats for automobile engines |
| 04/24/1990 | CA1268044A1 Manufacture of calmed steel with low nitrogen content |
| 04/17/1990 | US4917961 Method of producing corrosion-, heat- and wear-resistant member, and the member produced |
| 04/11/1990 | CN1007521B Permanent magnet made from the rare-earth with very low coercive force transition metal, boron alloy |
| 04/10/1990 | US4915735 Self-lubricating |
| 04/03/1990 | US4913878 Adding tellurium and sulfur or selenium to molten sample; timing cooling curve between two predetermined temperatures |
| 04/03/1990 | US4913739 Method for powder metallurgical production of structural parts of great strength and hardness from Si-Mn or Si-Mn-C alloyed steels |
| 04/03/1990 | US4913737 Mixing, kneading metallic powder and water-based binder, extruding, heating to remove binder, sintering, twisting; high density, toughness |
| 03/27/1990 | US4911882 Process for producing permanent magnets |
| 03/21/1990 | CN1040627A Self-lubricating iron-base wear-resistant alloy |
| 03/21/1990 | CN1040626A Maraging steel and method of its production |
| 03/20/1990 | US4909843 Highly wear-resistant iron-nickel-copper-molybdenum sintered alloy with addition of phosphorous |
| 03/20/1990 | CA1266790A1 Process for production of high-hardness, hardened and tempered special steel and special steel alloy |
| 03/14/1990 | CN1040393A Smelting process of compound cast iron from steel scrap |
| 03/14/1990 | CN1040392A Smelting process of thin-walled high strength compound cast iron |
| 03/13/1990 | US4908076 Magnet prepared by alloying constituents, casting, comminuting, sintering; high coercive force |
| 03/07/1990 | CN1007066B Binder for press-forming inoculating block |
| 02/28/1990 | CN1040061A Reduction-fusion process for the preparation rare earth ferroboron |
| 02/28/1990 | CN1006987B Method and apparatus for casting iron treated with magnesium |
| 02/27/1990 | US4904302 Roller in rotary compressor and method for producing the same |
| 02/21/1990 | CN1039926A Method and apparatus for making flakes of re-fe-b-type magnetically-aligned material |
| 02/14/1990 | EP0354666A1 Alloy steel powders for injection molding use, their commpounds and a method for making sintered parts from the same |
| 02/14/1990 | EP0354398A2 Iron-based acicular alloy powder, process for its production and its use |
| 02/14/1990 | EP0354389A1 Process for manufacturing sintered steel bodies, and bodies obtained thereby |
| 02/14/1990 | CN1039548A Sintering metal powder into structures without sintering aids |
| 02/14/1990 | CN1006811B Rare-earth low-chrome cast iron for making grinding ball and its technique of production |
| 02/14/1990 | CN1006769B Semi-continuous casting nodular cast iron pipe mfg. method |
| 02/13/1990 | US4900509 Process for manufacturing cast iron containing vermicular graphite |
| 02/13/1990 | US4900355 Method for making high-purity metal powder by jet-cooling |
| 02/08/1990 | WO1989008609A3 Production of silicon carbide, manganese carbide and ferrous alloys |
| 02/07/1990 | EP0354039A2 Inoculant dispensing apparatus for molted metal ladle |
| 02/06/1990 | US4898712 Two-stage ferrosilicon smelting process |
| 01/31/1990 | CN1039268A Fe-mn-al-c austenite containing nonmagnetic and low-temp. steels |
| 01/31/1990 | CN1039266A Preparing method of si-fe-bi instantaneous inoculant |
| 01/30/1990 | US4897114 Nitrogen-containing additive for steel melts |
| 01/25/1990 | WO1990000630A1 Fe-Mn-Al-C ALLOYS AND THEIR TREATMENT |
| 01/17/1990 | EP0351056A2 Sintering metal powders into structures without sintering aids |
| 01/16/1990 | US4894097 Rare earth type magnet and a method for producing the same |
| 01/11/1990 | WO1990000207A1 Sintered alloy steel with excellent corrosion resistance and process for its production |
| 01/09/1990 | US4892580 Lead-containing additive for steel melts |