Six Percent Or More Group Iv, V Or Vi Transition Metal Containing Patents (Class 148/324)
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Patent number: 6511554Abstract: The present invention relates to stainless spheroidal carbide cast iron material is such: comprises iron (Fe) as its main component, C 0.6˜4.0% and V 4˜15% as its necessary components, P 0.01˜0.15%, S 0.01˜0.05% Al 0.05˜1.0%, and Mg 0.01˜0.2% as gas (hydrogen) bubble assistants, and Si 0.2˜4.5%, Cr 13˜30%, Mn 0.2˜3.0%, and Ni and/or Co 4˜15% as anticorrosion matrix formers, and according to the case of necessary, alloy elements 0.1˜1.Type: GrantFiled: July 5, 2001Date of Patent: January 28, 2003Inventors: Yutaka Kawano, Shigenori Nishiuchi, Satoru Yamamoto, Seisuke Sugahara, Toshiyuki Kikuchi
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Patent number: 6406563Abstract: The present invention relates to stainless spheroidal carbide cast iron is such: comprises Fe as its main component;, C 0.6˜4.0% and V 4˜15% as its necessary components, P 0.01˜0.15%, S 0.01˜0.05%, and Al 0.05˜1.0% as bubble assistants, and Ni 4˜15%, Si 0.2˜4.5%, Cr 13˜30%, and Mn 0.2˜1.5% as anticorrosion matrix formers in weight %; produced by the process that minute spheroidal space of gas (hydrogen) bubble is dispersed substantially equally into molten metal positively by high temperature melting at 1950˜2073 K which is the bubbling reaction temperature, and spheroidal vanadium carbide of a covalent bond is crystallized inside of the spheroidal space, which has special characteristics such as corrosion-resistance, heat-resistance, abrasion-resistance, toughness and processing ability.Type: GrantFiled: February 26, 2001Date of Patent: June 18, 2002Inventors: Yutaka Kawano, Shigenori Nishiuchi, Satoru Yamamoto, Seisuke Sugahara, Toshiyuki Kikuchi
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Patent number: 6348109Abstract: A steel material which is manufactured in a non-powder metallurgical way, comprising production of ingots or castings from a melt, consists of an alloy having the following chemical composition in weight-% Carbon: 2.0-4.3%, Silicon: 0.1-2.0%, Manganese: 0.1-2.0%, Chromium: 5.6-8.5%, Nickel: max. 1.0%, Molybdenum: 1.7-3%, wherein Mo completely or partly can be replaced by double the amount of W, Niobium: max. 2.0%, Vanadium: 6.5-15%, wherein V partly can be replaced by double amount of Nb up to max. 2% Nb, Nitrogen: max. 0.3%, wherein the contents of on the one hand carbon and nitrogen and on the other hand vanadium and any possibly existing niobium shall be balanced relative to each other, such that the contents of the said elements shall lie within the area of A, B″, E, F, B′, B, C, D, A in the co-ordinate system in FIG. 2, where V+2Nb, C+N co-ordinates for said points are A: (9,3.1), B″: (9,2.85), E: (15,4.3), F: (15,3.75), B′: (9,2.65), B: (9,2.5), C: (6.5,2.0), D: (6.5,2.Type: GrantFiled: September 19, 2000Date of Patent: February 19, 2002Assignee: Uddeholm Tooling AktiebolagInventor: Odd Sandberg
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Publication number: 20010023717Abstract: The present invention relates to stainless spheroidal carbide cast iron is such: comprises Fe as its main component;, C 0.6˜4.0% and V 4˜15% as its necessary components, P 0.01˜0.15%, S 0.01˜0.05%, and Al 0.05˜1.0% as bubble assistants, and Ni 4˜15%, Si 0.2˜4.5%, Cr 13˜30%, and Mn 0.2˜1.5% as anticorrosion matrix formers in weight %; produced by the process that minute spheroidal space of gas (hydrogen) bubble is dispersed substantially equally into molten metal positively by high temperature melting at 1950˜2073 K which is the bubbling reaction temperature, and spheroidal vanadium carbide of a covalent bond is crystallized inside of the spheroidal space, which has special characteristics such as corrosion-resistance, heat-resistance, abrasion-resistance, thoughness and processing ability.Type: ApplicationFiled: February 26, 2001Publication date: September 27, 2001Inventors: Yutaka Kawano, Shigenori Nishiuchi, Satoru Yamamoto, Seisuke Sugahara, Toshiyuki Kikuchi
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Patent number: 6180266Abstract: A cutting tool having cutting edges made of a high speed tool steel exhibiting very high wear and anti-chipping resistances, and sufficient toughness is provided. The high speed tool steel consists essentially of by weight C:0.6 to 1.8%, Si:1.2% max, Mn:0.5% max, Cr:3.5 to 5.0%, Mo:10% max, W:21% max, V:2 to 4% and Co:7 to 10%, the balance being Fe and incidental impurities, and the steel of the cutting edge comprise MC-type carbide grains each having a maximum equal value diameter of a circle ranging substantially 5 to 14 &mgr;m, and the MC-type carbide grains having an equal value diameter of the circle ranging substantially 5 to 14 &mgr;m have a ratio between short and long diameters ranging over substantially 0.3.Type: GrantFiled: July 15, 1999Date of Patent: January 30, 2001Assignee: Nachi-Fujikoshi CorpInventors: Hirokuni Amano, Yuji Shimatani, Kiyoshi Nakagawa, Syunichi Asakura
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Patent number: 6057045Abstract: A powder-metallurgy produced high-speed steel article having a combination of high hardness and wear resistance, particularly at elevated temperatures. This combination of properties is achieved by the combination of W, Mo, V, and Co. The article is particularly suitable for use in the manufacture of gear cutting tools, such as hobs, and surface coatings.Type: GrantFiled: October 14, 1997Date of Patent: May 2, 2000Assignee: Crucible Materials CorporationInventors: Andrzej L. Wojcieszynski, William Stasko
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Patent number: 5853504Abstract: A lapping surface plate consisting of an Fe-base material containing 0.8 to 3.5 wt % of C, 1 to 7 wt % of Si, 5 to 15 wt % of Ni, and 1 wt % or less of Mn, the balance substantially being Fe, further containing 0.1 wt % or less of at least one element selected from the group consisting of Mg, Ca, and Ce, and having a graphite structure and a hardness of 250 Hv or more.Type: GrantFiled: August 28, 1997Date of Patent: December 29, 1998Assignee: Kabushiki Kaisha ToshibaInventor: Takanobu Nishimura
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Patent number: 5738734Abstract: A centrifugal cast roll shell material composed of a granular MC carbide, graphite and C: 2.5 to 4.7%, Si: 0.8 to 3.2%, Mn: 0.1 to 2.0%, Cr: 0.4 to 1.9%, Mo: 0.6 to 5%, V: 3.0 to 10.0% and Nb: 0.6 to 7.0%, satisfying the following formulae (1), (2), (3) and (4):2.0+0.715 V+0.10 Nb.ltoreq.C (%) (1)1.1.ltoreq.Mo/Cr (2)Nb/V.ltoreq.0.8 (3)0.2.ltoreq.Nb/V (4),the remainder being Fe and inevitable impurities, wherein the pouring temperature is 1,400.degree. C. or higher.Type: GrantFiled: October 29, 1996Date of Patent: April 14, 1998Assignee: Kawasaki Steel CorporationInventors: Yoshitaka Sawa, Tomoya Koseki, Kenji Ichino
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Patent number: 5445685Abstract: Ultrahigh carbon steels with superplastic properties are produced by heating a steel containing ferrite and carbide phases to a soaking temperature approximately 50.degree. C. above the A.sub.1 transformation temperature, soaking the steel above the A.sub.1 temperature for a sufficient time that the major portion of the carbides dissolve into the austenite matrix, and then cooling the steel in a controlled manner within predetermined limits of cooling rate or transformation temperature, to obtain a steel having substantially spheroidal carbides. New alloy compositions contain aluminum and solute additions which promote the formation of a fine grain size and improve the resistance of the carbides to coarsening at the forming temperature.Type: GrantFiled: May 17, 1993Date of Patent: August 29, 1995Assignee: The Regents of the University of CaliforniaInventors: Michael J. Strum, Alfred Goldberg, Oleg D. Sherby, Richard L. Landingham
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Patent number: 5407744Abstract: A method of producing steel wires intended for the manufacture of flexible conduits, steel wires obtained by this method, and flexible conduits reinforced by such wires is characterized by the fact that, for a given strain-hardening rate of the initial wire, a heat treatment is carried out under conditions of time and temperature such that the steel wire obtained after treatment has a mechanical rupture strength (Rm) greater than 850 MPa and a structure containing little free ferrite.Type: GrantFiled: January 14, 1993Date of Patent: April 18, 1995Inventors: Jose M. Mallen Herrero, Andre Sugier
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Patent number: 5344477Abstract: Prealloyed high-vanadium, cold work tool steel particles are provided for use in the powder-metallurgy production of tool steel articles. The particles are of a cold work tool steel alloy having an MC-type vanadium carbide dispersion of a carbide particle size substantially entirely less than 6 microns and in an amount of 18.5 to 34.0% by volume. The particles are produced by atomizing a molten tool steel alloy at a temperature above 2910.degree. F. and rapidly cooling the atomized alloy to form solidified particles therefrom. The particles have the MC-type vanadium carbide dispersion therein.Type: GrantFiled: March 4, 1993Date of Patent: September 6, 1994Assignee: Crucible Materials CorporationInventors: William Stasko, Kenneth E. Pinnow
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Patent number: 5316596Abstract: A roll shell, material is composed of C: 1.5.about.3.5%, Si: 1.5% or less, Mn: 1.2% or less, Cr: 5.5.about.12.0%, Mo: 2.0.about.8.0%, V: 3.0.about.10.0%, Nb: 0.6.about.7.0%, and satisfies the following formulae (1) and (2):V+1.8 Nb.ltoreq.7.5 C-6.0 (%) (1)0.2.ltoreq.Nb/V.ltoreq.0.8 (2)and remainder of Fe and inherent impurities.Type: GrantFiled: May 7, 1993Date of Patent: May 31, 1994Assignee: Kawasaki Steel CorporationInventor: Yoshihiro Kataoka
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Patent number: 5252149Abstract: An erosion and corrosion resistant ferrochromium alloy comprising the following composition, in wt. %, 34-50 chromium, 1.5-2.5 carbon, up to 5 manganese, up to 5 silicon, up to 5 molybdenum, up to 10 nickel, up to 5 copper, up to 1% of each of one or more micro-alloying elements selected from the group consisting of titanium, zirconium, niobium, boron, vanadium and tungsten, and balance, iron and incidental impurities.The alloy has a microstructure comprising eutectic chromium carbides in a matrix comprising one or more of ferrite, retained austenite and martensite, as herein defined. Optionally, the microstructure further comprises one of primary chromium carbides, primary ferrite or primary austenite in the matrix.Type: GrantFiled: February 10, 1993Date of Patent: October 12, 1993Assignee: Warman International Ltd.Inventor: Kevin F. Dolman
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Patent number: 5225007Abstract: The wear-resistant compound roll is constituted by a shell portion made of an iron-base alloy having the composition consisting essentially of 1.0-3.5 weight % of C, 3.0 weight % or less of Si, 1.5 weight % or less of Mn, 2-10 weight % of Cr, 9 weight % or less of Mo, 20 weight % or less of W, 2-15 weight % of V, 0.08 weight % or less of P, 0.06 weight % or less of S, 300 ppm or less of B, the balance being substantially Fe and inevitable impurities, and a shaft portion made of steel. The iron-base alloy of the shell portion has a structure containing by an area ratio 5-30 % of granular carbides and 5 % or less of non-granular carbides, an alloy matrix of the shell portion having a Vickers hardness (Hv) of 550 or more. This compound roll has excellent wear resistance and resistance to surface roughening.Type: GrantFiled: March 24, 1992Date of Patent: July 6, 1993Assignee: Hitachi Metals Ltd.Inventors: Toshiyuki Hattori, Masahiko Ooshima, Noriyoshi Fuchigami
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Patent number: 5215604Abstract: A wear segment for use in a concrete pipe making machine is provided which has increased wear resistance as contrasted to wear segments currently in use. The segment has a Rockwell C hardness of about 68 in the heat treated condition and has very improved wear to a considerable degree over prior art segments which have had a typical Rc hardness of about 58.Type: GrantFiled: August 1, 1990Date of Patent: June 1, 1993Assignee: International Pipe Machinery CorporationInventor: Gerald R. Crawford
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Patent number: 5183518Abstract: A highly abrasion-resistant, high-chromium white cast iron alloy containing the following elemental analysis in percent by weight: 2.4-3.8% carbon, 0.4 to 2.0% manganese, 0.2 to 1.9% silicon, 0.0 to 3.0% copper, 1.5 to 4.5% nickel, 12.0 to 29.0% chromium, and the remainder iron; and super-hardened by placement in a cooling medium at a temperature of at least -55.degree. C. for a time sufficient to cause the iron alloy to have a hardness of at least about 700 HB.Type: GrantFiled: February 6, 1992Date of Patent: February 2, 1993Assignee: Townley Foundry & Machine Co., Inc.Inventor: Roman Radon
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Patent number: 5104458Abstract: The present invention discloses a roll ring for hot and/or cold rolling. The rolling track comprises one or several cemented carbide rings, which are cast into a casing made by an iron alloy. The cast alloy comprising a materially graphitic cast iron, which after the casting contains residual austenite. This residual austenite is at subsequent heat treatment or treatments partly or totally transformed under volume increase to mainly bainite with the aim of reducing or totally eliminating the differential shrinkage between the cast iron and the cemented carbide as a result from cooling after the casting.Type: GrantFiled: February 21, 1991Date of Patent: April 14, 1992Assignee: Sandvik ABInventors: Gert I. S. Sundstedt, Ingvar J. Carlsson
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Patent number: 5096515Abstract: A high strength high chromium cast iron contains fine particle precipitated hard carbide. The precipitated hard carbide has an average particle size of 20 .mu.m or less and hardness of Hv 500 or more in martensite base matrix, and has area ratio in a range of 30% or more and 45% or less. The precipitated hard carbide has spheroidal ratio (surface area of sphere circumscribing the precipitated hard carbide versus actual surface area of precipitated hard carbide) of 40% or more.Type: GrantFiled: November 28, 1989Date of Patent: March 17, 1992Assignees: Nippon Piston Ring Co., Ltd., Nissan Motor Company, LimitedInventors: Osamu Kawamura, Teruo Takahashi, Makoto Kano, Ichiro Tanimoto
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Patent number: 5049354Abstract: This invention is directed to a cast iron having a graphite structure in an austenitic iron matrix and consisting essentially of, in weight %, at least about 1.0% and not more than about 3.5% of carbon, not more than about 1.0% of silicon, at least about 29% and not more than about 34% of nickel, at least about 4% and not more than about 8% of cobalt and the balance substantially all iron.Type: GrantFiled: October 25, 1989Date of Patent: September 17, 1991Assignee: Kabushiki Kaisha ToshibaInventors: Takanobu Nishimura, Motoo Suzuki
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Patent number: 4955414Abstract: A bearing having a valve seat for a rotary compressor which is made of austenitic cast iron with graphite crystallized in an austenite matrix in the form of an A type, C type or A/C combined type under the ISO classification, maximum length crystallized graphite being in a range of 0.45 to 1.4 mm.Type: GrantFiled: May 10, 1989Date of Patent: September 11, 1990Assignee: Kabushiki Kaisha ToshibaInventor: Eiichiro Fujii
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Patent number: 4853047Abstract: The work-performing member for a farm machine has a cutting edge made of a high-carbon steel containing graphite in structurally free state in an amount of 0.5 to 1.32 percent of the total mass of the material.Type: GrantFiled: April 8, 1988Date of Patent: August 1, 1989Assignee: Nauchno-Proizvodstvennoe Obiedinenie Po Tekhnologii Mashinostroenia Dlya Zhivotnovodstva I Kormoproizvodstva "RostNIITM"Inventors: Jury L. Perevozkin, Jury A. Gajun, Petr K. Grigorov, Vasily M. Zhurakovsky, Boris V. Samelik