| Patents for C21D 6 - Heat treatment of ferrous alloys (4,815) |
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| 04/28/2004 | EP1413634A1 METHOD OF PRODUCING HIGH CR−BASED SEAMLESS STEEL TUBE |
| 04/28/2004 | EP1413631A2 Improved spall propagation properties of case-hardened M50 and M50NIL bearings |
| 04/28/2004 | CN1492939A Steel article |
| 04/28/2004 | CN1147610C High tensile cold-rolled steel sheet excellent in ductility and in strain ageing hardening properties, and method for producing same |
| 04/28/2004 | CN1147594C Microcomputer controlled deeply cold processing equipment and its technology |
| 04/27/2004 | US6726786 Suppressing ageing of dressed cold strip by storage at low temperature; buckling resistant |
| 04/23/2004 | CA2409433A1 Method of cryogenic treatment of tungsten carbide containing cobalt |
| 04/22/2004 | WO2004033741A1 Maraging steel golf club head |
| 04/22/2004 | US20040074574 Steel having not only an excellent long-term creep strength at a high temperature exceeding 650 degrees C., but also an improved oxidation resistance, which is based on ferritic phase and contains 13% by weight or more of chromium, and |
| 04/22/2004 | US20040074566 Amorphous alloys for magneto-acoustic markers in electronic article surveillance having reduced, low or zero co-content and method of annealing the same |
| 04/21/2004 | CN1491291A Heat-treated steel wire for high strength spring |
| 04/21/2004 | CN1491290A Ferritic stainless steel sheet excellent in press formability and workability and method for production thereof |
| 04/20/2004 | US6723175 Formed member made of steel sheet and method for producing same |
| 04/15/2004 | WO2004031419A1 Graphite and nitrogen-free cast alloys |
| 04/15/2004 | US20040069379 Ferromagnetic resonator produced by continuously annealing an amorphous magnetic alloy containing Fe, Ni and a Group Vb or VIb with a tensile stress applied along the ribbon axis to induce a magnetic easy plane perpendicular to said axis |
| 04/14/2004 | EP1047798A4 Ultra-high strength ausaged steels with excellent cryogenic temperature toughness |
| 04/14/2004 | EP0907939B1 Annealing magnetic elements for stable magnetic properties |
| 04/14/2004 | CN1145983C Metallic glass alloys for mechanically resonant markere surveillance systems |
| 04/13/2004 | US6719854 Improved quiet |
| 04/13/2004 | CA2264823C Age hardenable alloy with a unique combination of very high strength and good toughness |
| 04/08/2004 | US20040065393 Low temperature electromagnets |
| 04/08/2004 | DE10152293B4 Verwendung einer Chrom-Stahllegierung Using a chromium steel alloy |
| 04/07/2004 | EP1405931A2 Heat-resisting cast steel |
| 04/07/2004 | EP1404884A2 Improved metal frame for electronic hardware and flat panel displays |
| 04/01/2004 | US20040060622 Especially strengthened by precipitation hardening of (Ni3(Al,Ti)), (Ni3(Nb,Al,Ti)), (Ni3Nb) or MO2C; specially adapted for gas turbine or internal combustion engine exhaust system parts |
| 04/01/2004 | US20040060620 High performance nanostructured materials and methods of making the same |
| 04/01/2004 | DE10242322A1 Golf club head used in golf club manufacture is made from a rust-free age-hardened maraging steel containing alloying additions of nickel, chromium, titanium, beryllium |
| 03/31/2004 | CN1143902C Powder metallurgy manufactured high speed steel |
| 03/30/2004 | US6712912 Welding method, filler metal composition and article made therefrom |
| 03/25/2004 | WO2004024968A1 Method for producing dispersed oxide reinforced ferritic steel having coarse grain structure and being excellent in high temperature creep strength |
| 03/25/2004 | US20040057862 Improved oxidation resistance and hot-workability |
| 03/25/2004 | US20040055673 Overcoating with solid lubricant; cold rolling |
| 03/25/2004 | US20040055670 Hot forming tool steels; hardening, depassivation before nitriding |
| 03/24/2004 | EP1303731A4 Freezer and plant gas system |
| 03/24/2004 | CN1143007C Stainless steel plate with enriched copper crystal and/or copper coagulated layer dispersed in substrate |
| 03/18/2004 | WO2004022810A1 Use of chrome steel as raw material for corrosion-resistant spring elements and method for producing said chrome steel |
| 03/18/2004 | US20040050463 High strength and corrosion resistant alloys comprising carbon, silicon, chromium, nickel, nitrogen, molybdenum, tungsten and iron, formed by heating and cooling |
| 03/18/2004 | US20040050462 Alloys chromium, molybdenum, carbon and niobium, titanium or tantalum, having tensile strength, for use as current collectors in fuel cells |
| 03/18/2004 | US20040050459 Alloys having corrosion resistance and hardness used as tools |
| 03/17/2004 | EP1397524A1 Cold work steel |
| 03/17/2004 | CN1142560C Multielement gap type permanent-magnet material and production process of magnetic powder and magnet |
| 03/17/2004 | CN1142312C Vehicle components |
| 03/11/2004 | US20040048134 Low-contact-resistance interface structure between separator and carbon material for fuel cell, separator and carbon material used therein, and production method for stainless steel separator for fuel cell |
| 03/11/2004 | US20040047757 High-hardness, high-toughness steels and crawler components, earth wear resistant components, fastening bolts, high-toughness gears, high-toughness, high contact pressure resistance gears, and wear resistant steel plates using the same |
| 03/11/2004 | DE10237446A1 Verwendung eines Chrom-Stahls und dessen Herstellung Use of a chromium steel and its manufacturing |
| 03/10/2004 | CN1141403C Low-carbon steels with superior mechanical and corrosion properties, and its mfg method |
| 03/04/2004 | WO2004018271A1 Spring element made from a ferritic chrome steel |
| 03/03/2004 | EP1392873A1 Method of producing stainless steels having improved corrosion resistance |
| 03/03/2004 | EP1042516B1 Cold drawn wire and method for the manufacturing of such wire |
| 03/03/2004 | EP1040208B1 Tin-bearing free-machining steel |
| 03/03/2004 | CN1140640C Method for manufacture of steel products of precipitation hardened martensitic steel, steel products obtained with such method and use of said steel products |
| 03/02/2004 | US6699333 Comprised of at least silicon, chromium, nickel, molybdenum, carbon and iron; allows high tempering temperature; having elevated temperature hardness; preserves core properties |
| 03/02/2004 | CA2282128C Stainless steel anode for electrocoagulation printing |
| 03/02/2004 | CA2131651C Martensitic hot work tool steel die block article and method of manufacture |
| 02/26/2004 | US20040035499 Rolling elements |
| 02/25/2004 | EP1391528A1 Ferritic stainless steal and martensitic stainless steel both being excellent in machinability |
| 02/25/2004 | CN1139943C Hard magnetic material |
| 02/24/2004 | US6696016 Having the capability of precipitating at least one intermetallic compound precipitate of a laves phase of fe2w, a laves phase of fe2mo, a mu phase, and a compound represented by ni3x, where x is al or ti |
| 02/24/2004 | US6695930 .05-.24 wt% carbon, 15-28 wt% cobalt and 1.5-9.5 wt% nickel, small percentages of chromium, molybdenum, and vanadium; and the balance iron |
| 02/19/2004 | WO2004015160A1 Method for manufacturing stainless steel product by nitrogen absorption treatment and stainless steel product produced by the method |
| 02/19/2004 | US20040031543 Iron-boron-rare earth (neodymium or praseodymium) based magnet with enhanced coercive force by increasing a content of boron and, containing a small amount of aluminum, silicon, copper, chromium, nickel, and manganese; also lower cost |
| 02/18/2004 | CN1475594A Fe-Ni alloy material for shadow mask and its preparing process |
| 02/17/2004 | US6692992 Hardened Fe-Ni alloy for the manufacture of integrated circuit leaderframes and manufacturing process |
| 02/17/2004 | US6692592 Method for manufacturing high chromium system seamless steel pipe |
| 02/17/2004 | US6692584 High tensile cold-rolled steel sheet excellent in ductility and in strain aging hardening properties, and method for producing the same |
| 02/12/2004 | WO2004013367A2 Plasma-nitriding of maraging steel, shaver cap for an electric shaver, cutting device made out of such steel and an electric shaver |
| 02/12/2004 | US20040027220 Half-cycle transductor with a magnetic core, use of half-cycle transductors and method for producing magnetic cores for half-cycle transductors |
| 02/12/2004 | US20040026562 Precipitated, hardening stainless steels; braking strips |
| 02/12/2004 | US20040025988 Process for making iron-based casting allow |
| 02/11/2004 | CN1475018A Magnetic amplifier choke with magnetic core, use of magnetic amplifier choke and method for producing magnetic core for magnetic amplifier choke |
| 02/10/2004 | US6689995 Apparatus and method for healing a workpiece of metal |
| 02/04/2004 | EP0995809B1 Steel for oil well pipes with high wet carbon dioxide gas corrosion resistance and high seawater corrosion resistance, and seamless oil well pipe |
| 02/04/2004 | CN1473131A Endless yarn tensioning strip and method for producing the same |
| 02/04/2004 | CN1472490A Opening method and apparatus for metal material cryogenic treating case door |
| 01/29/2004 | WO2003016582A3 Method for increasing the dynamic stability under load of a toothed structural component |
| 01/28/2004 | EP1147238B1 Stainless steels |
| 01/28/2004 | CN1136328C Pitting-resistant double phase stainless steel alloy having improved machinability |
| 01/27/2004 | US6682613 Heating, cooling and deforming material containing niobium, vanadium and/or titanium to introduce dislocations in crystal structure |
| 01/22/2004 | US20040012321 Fe-Ni alloy material for shadow mask and method for manufacturing thereof |
| 01/21/2004 | EP1382701A1 FERRITIC HEAT−RESISTANT STEEL AND METHOD FOR PRODUCTION THEREOF |
| 01/15/2004 | WO2004005572A1 Surface modified stainless steel |
| 01/14/2004 | EP1379706A1 Reinforced durable tool steel, method for the production thereof, method for producing parts made of said steel, and parts thus obtained |
| 01/14/2004 | CN1468439A Annealed amorphous alloys for magneto-acoustic markers |
| 01/14/2004 | CN1135059C Amorphous metallic alloy electric heating element and electric heating system |
| 01/14/2004 | CN1134809C Method for manufacturing nickel-iron type shadow mask, nickel-iron alloy strip, shadow mask plate, shadow mask frame |
| 01/13/2004 | US6677560 Apparatus for inductively heating a workpiece |
| 01/13/2004 | US6676724 Powder metal valve seat insert |
| 01/08/2004 | WO2004002673A1 Seam-welded air hardenable steel tubing |
| 01/08/2004 | US20040003869 Steel material production method |
| 01/07/2004 | CN1134034C Process for mfg. magnetic component made of iron-based soft magnetic alloy having nanocrys talline structure |
| 01/06/2004 | US6673166 With less anisotropy, by an effect of niobium-containing precipitates on control of crystalline orientation |
| 01/02/2004 | EP1375841A2 powder metal valve seat insert |
| 01/02/2004 | EP1373590A1 Ultra-high-strength precipitation-hardenable stainless steel and elongated strip made therefrom |
| 01/01/2004 | US20040000283 Powder metal valve seat insert |
| 12/31/2003 | CN1133183C Heat-treatment of glassy metal alloy for article surveillance system markers |
| 12/31/2003 | CN1132960C 耐污染的研磨加工不锈钢板及其制造方法 Resistant to pollution of polished stainless steel sheet and manufacturing method thereof |
| 12/30/2003 | US6669790 Combining an iron-carbon-chronium system with carbides of vanadium, niobium, and/or titanium; toughness, wear and corrosion resistance |
| 12/25/2003 | WO2003106728A1 Cold work steel and cold work tool |
| 12/25/2003 | WO2003106727A1 Steel and mould tool for plastic materials made of the steel |
| 12/24/2003 | CN1463295A Iron-based alloy and method for production thereof |