| Patents for C21D 5 - Heat treatment of cast-iron (891) |
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| 06/07/1995 | CN1028767C Method for low-temp. annealing of malleable cast-iron |
| 05/24/1995 | CN1028545C infinite chill hardening V-Ti nodular graplite cast iron roller and casting process thereof |
| 05/17/1995 | EP0653495A1 Process for graphitizing cast iron |
| 02/22/1995 | EP0639651A1 Intercritical heat treatment of cast iron workpieces |
| 02/22/1995 | CN1099075A High strength and high chrome cast iron lining plate and its prodn. method |
| 02/16/1995 | WO1995004628A1 Method of manufacture of a metal part resistent to fluid abrasion and metal part obtained |
| 11/30/1994 | CN1026798C Heat treatment technique for malleable black core cast-iron |
| 11/02/1994 | EP0622466A1 Method of hardening pieces of spheroidal graphite cast iron |
| 11/02/1994 | CN1026418C Process for making low temp annealing catalyst for malleable cast iron and its catalyst |
| 09/28/1994 | EP0617134A1 Process for remelting surface areas of workpieces |
| 09/13/1994 | US5346561 Spheroidal graphite cast iron member having improved mechanical strength hand method of producing same |
| 09/07/1994 | EP0613956A1 Process for making gray cast iron for the surface-remelting treatment |
| 08/24/1994 | CN1091155A High malleable wear-resisting white cast iron and making method thereof |
| 08/02/1994 | US5334125 Martensite roll |
| 07/13/1994 | EP0605491A1 Camshaft and method for casting the camshaft. |
| 07/06/1994 | CN1088997A Low-alloy spheroidal graphite cast-iron and process for heat-treatment of casting thereof |
| 06/15/1994 | EP0601451A1 Process for hardness increasing and possibly for smoothing of work pieces and work pieces made by this process |
| 05/26/1994 | DE4313569C1 Heat treatment of spheroidal graphite cast iron - to improve mechanical properties. |
| 05/25/1994 | CN1024690C High-chromium alloy cast iron, its hot treatment process and application |
| 03/16/1994 | CN1083866A Silicate's aqueous solution quench treatment of grinding ball made of nodular cast iron |
| 03/02/1994 | CN1083116A Method for low-temp annealing of forgeable cast iron |
| 02/22/1994 | US5288346 Preparing melt containing iron, carbon, and alloying elements, cooling, annealing below solidus temperature of white cast iron |
| 12/02/1993 | DE4217530A1 Treating piston slide paths - using laser beam performing motion similar to honing motion |
| 10/20/1993 | CN1077496A Heat treatment of wear resisting iron or steel pieces |
| 09/28/1993 | US5248354 Method for the preparation of a body of austempered ductile cast iron |
| 09/21/1993 | US5246510 Method for producing a selectively surface hardened cast iron part |
| 09/09/1993 | DE4229092C1 Reducing the bore of cylinder liners - by transformation of austenite into martensite over a certain bore region |
| 06/09/1993 | DE4224264C1 Remelting of workpiece surface - by reducing carbon@ content in parts where remelting will not occur and directing an arc, electron, plasma or laser beam onto the surface |
| 06/08/1993 | CA1318837C Machine element and method of making |
| 06/01/1993 | US5215709 Method and device for treatment of metal baths by means of a material having a high gas vapor potential |
| 04/28/1993 | CN1020380C Composite heat treatment technology of unity nodular cast iron parts by once heating and deeply and intensively toughening |
| 04/01/1993 | WO1993005908A1 Camshaft and method for casting the camshaft |
| 04/01/1993 | CA2116871A1 Camshaft and method for casting the camshaft |
| 03/16/1993 | US5193375 Method for enhancing the wear performance and life characteristics of a brake drum |
| 02/10/1993 | CN1068856A High-chrome cast iron mill ball and preparation thereof |
| 02/03/1993 | CN1068598A Liner plate made of rare-earth alloyed white cast iron and its making method |
| 02/02/1993 | US5183518 Cryogenically super-hardened high-chromium white cast iron and method thereof |
| 01/20/1993 | CN1068149A Roller made of infinitely chilled vanadium and titanium contained nodular cast iron and its casting process |
| 12/29/1992 | CA1311993C Gray cast iron having both increased wear resistance and toughness |
| 12/02/1992 | CN1066686A Heating treatment technology of black core malleable cast-iron |
| 12/01/1992 | US5167067 Method of making a roll with a composite roll ring of cemented carbide and cast iron |
| 11/12/1992 | WO1992019777A1 Process for producing deformable white cast iron |
| 11/11/1992 | EP0512255A1 Method and device for treatment of metal baths by means of a material having a high gas or vapour potential |
| 11/11/1992 | CN1019024B Laser heat-treatment for the shell of spherulitic iron steering gear of rare-earth ferrite |
| 09/23/1992 | EP0505343A1 Process for the manufacture of a roll and a roll |
| 09/02/1992 | CN1064106A Method for forming white core of martensitic steel parts under controllable water-base atmosphere |
| 08/18/1992 | US5139579 Melting molding to form a casting containing eutectic carbide particles, heat treating to convert carbide particles to graphite nodules, cooling to form an austenitic matrix, quenching to form an ausferrite and cooling to form bainite |
| 07/29/1992 | CN1017634B Bainite and martensite mottled nodular cast iron grinding ball |
| 07/14/1992 | US5129632 Heat treatment apparatus for thin spheroidal graphite cast iron products |
| 06/24/1992 | CN1062174A Temperature changing quenching technology for high chromium cast iron grinding ball |
| 04/14/1992 | US5104458 Sintering, casting, heat-treatment; elimination of shrinkage; converting austenite to brinite |
| 01/21/1992 | US5082507 Austempered ductile iron gear and method of making it |
| 12/11/1991 | CN1056901A White cast iron with high silicon-carbon ratio and medium chrome |
| 11/12/1991 | US5064478 Method and apparatus for surface austempering of cast iron parts |
| 09/03/1991 | US5044056 Roll ring comprising a ring of cemented carbide metallurgically bonded to a cast iron body |
| 09/03/1991 | CA1288319C Machinable ductile or semiductile iron |
| 08/27/1991 | US5043028 Melting; forming tempered graphite nodules; quenching |
| 08/20/1991 | US5041173 Cast iron with increased concentration of fine graphite spheres |
| 08/07/1991 | EP0439703A1 Method for improving the bond between a hollow tube and parts thereon |
| 07/23/1991 | US5034069 Low white cast iron grinding slug |
| 07/10/1991 | CN1013121B Remelting hardening technique for the surface of ductile iron workpieces |
| 07/02/1991 | US5028281 Camshaft |
| 04/16/1991 | CA1283030C Process for producing a low alloy white cast iron and product resulting therefrom |
| 03/13/1991 | EP0416418A2 Method of making rocker arm |
| 02/05/1991 | US4990194 Graphite particles in ferrite matrix |
| 12/26/1990 | CN1048064A Process making super high-carbon steel for firebrick die |
| 12/11/1990 | CA1277478C Process and installation for continuously manufacturing structurally controlled spheroidal graphite cast iron pipes |
| 09/12/1990 | CN1045280A Bainite and martensite mottled nodular cast iron grinding ball |
| 08/16/1990 | DE3943345A1 Thin-walled ferritic spheroidal graphite cast iron article - contains pearlite, and fine gaps between graphite particles and ferritic matrix are absent |
| 08/14/1990 | US4948432 Method for manufacturing a rotor for use in a progressive cavity pump |
| 06/21/1990 | DE3941338A1 Improving wear and pin-hole corrosion properties of cast iron - by remelting surface of casting and quenching to reduce size of modular graphite |
| 06/20/1990 | EP0374116A1 Roll ring, comprising cemented carbide and cast iron, and method for manufacture of the same |
| 05/30/1990 | CN1042569A Laser heat-treament for the shell of spherulitic iron steering gear of rare-earth ferrite |
| 05/17/1990 | DE3838315A1 Process for treating a cylinder block |
| 05/16/1990 | CN1042193A High-chromium alloy cast iron, its hot treatment process and application |
| 05/16/1990 | CN1042187A Remelting hardening technique for the surface of ductile iron workpieces |
| 03/27/1990 | US4911763 Process for producing a low alloy white cast iron |
| 02/13/1990 | US4900375 Magnesium-treated, decarburizingly-annealed cast iron material |
| 02/06/1990 | US4899024 Method for treating large cast iron dies, particularly for vehicle-sheet metal pressing |
| 01/02/1990 | US4891076 Gray cast iron having both increased wear resistance and toughness |
| 12/27/1989 | EP0347568A2 Method of making wear-resisting castings |
| 12/20/1989 | CN1038128A Composite heat treatment technology of unity nodular cast iron parts by once heating and deeply and intensively toughening |
| 11/14/1989 | US4880477 Process of making an austempered ductile iron article |
| 09/19/1989 | US4867804 Manufacturing process of toughened bainitic nodular graphite cast iron |
| 09/19/1989 | US4867803 Lapping tools and method of manufacturing the same |
| 09/05/1989 | US4863533 Apex seal for rotary piston engine and method for manufacturing the same |
| 08/30/1989 | CN1035138A Isothermal quenching method for preparation of grinding ball made of spheroidal cast iron |
| 07/25/1989 | US4851637 Method for processing large cast iron dies, particularly for vehicle sheet-metal pressing, and the apparatus for its implementation |
| 06/13/1989 | US4838956 Method of producing a spheroidal graphite cast iron |
| 05/16/1989 | CA1254082A1 Iron-base article having a remelted layer and method of making the same |
| 05/03/1989 | CN1032676A Water bath controlled cooling normalization technique for spheroidal graphite cast iron with casting heat |
| 02/28/1989 | US4808791 Method for processing large cast iron dies, particularly for vehicle sheet-metal pressing, and the apparatus for its implementation |
| 02/01/1989 | EP0302049A1 Method of heat treating malleable cast iron |
| 01/31/1989 | US4800949 Method and installation for the continuous manufacture of pipes from spheroidal graphite cast-iron having a controlled structure |
| 12/13/1988 | CA1246404A1 Iron piston having selectively hardened ring groove |
| 11/08/1988 | CA1244323A1 Hardenable cast iron |
| 09/28/1988 | CN87101993A Catalytic annealing process and its catalyst for malleable cast iron |
| 09/27/1988 | CA1242409A1 Cast iron article and method of making same |
| 09/20/1988 | US4772340 Method of making iron-base articles having a remelted layer |
| 09/20/1988 | US4771524 Roll having a hard envelope surface |