Containing Boron(b) Or Nitrogen(n) Patents (Class 75/244)
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Patent number: 4505746Abstract: An improved diamond compact of the present invention comprises 20 to 85% by volume of diamond grains with a grain size of at least 3 .mu.m and the balance of a binder consisting of 20 to 95% by volume of ultra-fine diamond grains with a grain size of at most 1 .mu.m, at least one member with a grain size of at most 1 .mu.m, selected from the group consisting of carbides, carbonitrides, nitrides, borides of Group 4a, 5a and 6a elements of Periodic Table, solid solutions thereof and mixed crystals thereof and at least one member selected from the group consisting of iron group metals.Type: GrantFiled: September 3, 1982Date of Patent: March 19, 1985Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tetsuo Nakai, Shuji Yazu
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Patent number: 4504312Abstract: A highly wear-resistant sintered ferrous alloy which consists essentially of 2.0-8.0% of Cr, 0.1-1.0% of B, 1.0-2.5% of Si, 0.3-1.2% of Mn, 1.2-3.8% of C, by weight, and the balance of Fe. The alloy is produced by compacting and sintering a powder mixture, which is preferably prepared by mixing 75-90 parts by weight of a cast iron powder with 25-10 parts by weight of a Fe--Cr--B--Si alloy powder.Type: GrantFiled: June 22, 1983Date of Patent: March 12, 1985Assignee: Nissan Motor Company, LimitedInventors: Takaaki Oaku, Yoshihiro Maki, Yasuzi Hokazono
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Patent number: 4450135Abstract: A method of preparing electrical contacts and electrical contact materials comprises the steps of blending a conductive metallic component, such as silver, with nickel and zirconium diboride which is substantially completely free of oxides, pressing the powder mixture to form a pre-sintered compact, and thereafter liquid phase sintering the compact to a densified body.The zirconium diboride is mixed with about 2 weight percent of a reducing agent, preferably mixed carbon and boron powders, and heated to remove oxides from the surface of the zirconium diboride powder particles prior to the steps of pressing and sintering.Type: GrantFiled: January 4, 1982Date of Patent: May 22, 1984Assignee: GTE Laboratories IncorporatedInventors: Thomas E. Peters, John C. Gustafson, Boon Wong
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Patent number: 4447263Abstract: A blade member for cutting tools comprises a cermet substrate having on a surface thereof a reaction layer. The reaction layer is composed of carbo-nitride of at least two metals in groups IV.sub.A, V.sub.A and VI.sub.A, the metals including Ti. The reaction layer may be composed of oxy-carbo-nitride of the above metals. The reaction layer may consist of inner and outer layers, the inner layer being composed of carbo-nitride of the above metals while the outer layer is composed of oxy-carbo-nitride of the above metals. The blade members with the reaction layer exhibits excellent toughness, wear resistance and thermoplastic deformation resistance. There is also disclosed a process for producing the above blade member.Type: GrantFiled: September 29, 1982Date of Patent: May 8, 1984Assignee: Mitsubishi Kinzoku Kabushiki KaishaInventors: Taijiro Sugizawa, Hironori Yoshimura, Junichi Toyama
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Patent number: 4442180Abstract: The invention relates to a sintered body for use in a cutting tool comprising a cutting edge forming part having particularly high hardness and wear resistance bonded to a supporting member having high plastic deformability, stiffness, transverse rupture strength, thermal conductivity, thermal expansion coefficient, resistance to corrosion, oxidization and the like, and to a method for producing the same. A diamond powder or high pressure form boron nitride powder is placed in contact with preliminarily sintered cermet constituted by carbide crystals chiefly comprising molibdenum in the form of (Mo, W)C bonded by iron group metals, the combined body being sintered at a temperature and pressure under which the diamond powder or high pressure form boron nitride powder is thermodynamically stable so that the sintered body of the diamond or high pressure form boron nitride is bonded to the cermet thereby enabling to obtain a sintered body having the said high properties for use in a cutting tool.Type: GrantFiled: May 8, 1981Date of Patent: April 10, 1984Assignee: Sumitomo Electric Industries, Ltd.Inventors: Akio Hara, Shuji Yazu
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Patent number: 4437890Abstract: A method of the preparation of an improved high-density sintered alloy composed mainly or iron and up to 50 wt. % of copper, in which boron is added in an amount of no less than 0.03% to suppress or limit the copper growth phenomenon during sintering. The alloys prepared by the present method undergo less dimensional changes during sintering and are thus of a very high density as compared with the conventional alloys of the same type.Type: GrantFiled: March 21, 1983Date of Patent: March 20, 1984Assignee: Hitachi Powdered Metals Co., Ltd.Inventors: Tadao Hayasaka, Masahiro Suzuki, Shigeru Ozawa, Yoshiaki Takeya
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Patent number: 4435482Abstract: The present invention aims to provide a sliding member: to be operated under a high load and high sliding speed; having high impact resistance and high break-in property; to be highly resistant and stable under boundary lubricating conditions, and; to be engaged with the swash plate made of iron or aluminum in a swash plate type compressor. The sliding member of the present invention comprises:a base comprising an iron-based alloy, and;a bearing layer, consolidated to said base and formed by applying on said base a powder coating having a thickness not more than 0.5 mm, and then baking said coating, said powder consisting of an iron family element and an additive component which includes from 3 to 30% by weight of boron.Type: GrantFiled: February 25, 1981Date of Patent: March 6, 1984Assignee: Taiho Kogyo Co., Ltd.Inventors: Kenichiro Futamura, Eiji Asada, Tatsuhiko Fukuoka
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Patent number: 4427446Abstract: A corrosion- and abrasive wear-resistant composite material for use in centrifugally cast linings composed of a matrix of a metal having corrosion-resistance and an abrasive wear-resistant reinforcing material dispersed as particles in the matrix. The reinforcing material has a higher hardness and a smaller specific density than the matrix.Type: GrantFiled: April 13, 1981Date of Patent: January 24, 1984Assignees: Japan Steel Works, Ltd., Toyo Kohan Co., Ltd.Inventors: Tsuyoshi Miura, Yutaka Arakida, Yoshikazu Kondo, Tsuneyuki Ide
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Patent number: 4419130Abstract: A class of iron base materials which derive improved properties from the presence of a finely dispersed titanium diboride phase is described. The materials comprise a ferrous matrix containing a fine relatively uniform dispersion of titanium diboride particles are typically less than 0.1 micron in diameter and are present in number densities of 10.sup.10 per mm.sup.3 or greater. These materials are produced by the rapid solidification of an iron alloy containing titanium and boron. Powder metallurgy techniques may be employed.Type: GrantFiled: November 19, 1980Date of Patent: December 6, 1983Assignee: United Technologies CorporationInventor: Edward R. Slaughter
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Patent number: 4404028Abstract: New nickel rich metal alloys containing copper along with specific amounts of boron are disclosed. The alloys are subjected to rapid solidification processing (RSP) techniques which produce cooling rates between .about.10.sup.5 .degree. to 10.sup.7 .degree. C./sec. The as-quenched ribbon, powder, etc. consists primarily of a metastable crystalline solid solution phase. The metastable crystalline phases are subjected to suitable heat treatments so as to produce a transformation to a stable multiphase microstructure which includes borides. This heat treated alloy exhibits superior mechanical properties with good corrosion and/or oxidation resistance for numerous engineering applications.Type: GrantFiled: April 27, 1981Date of Patent: September 13, 1983Assignee: Marko Materials, Inc.Inventors: Viswanathan Panchanathan, Ranjan Ray, Bill C. Giessen
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Patent number: 4394170Abstract: A composite sintered compact containing high density boron nitride, which consists of zincblende-type boron nitride, wurtzite-type boron nitride, ceramic material and metal in a specifically limited mixing ratio and has a high abrasion resistance, can be obtained under a relatively mild sintering condition and can be easily worked into a cutting tool.Type: GrantFiled: November 14, 1980Date of Patent: July 19, 1983Assignee: Nippon Oil and Fats Company, LimitedInventors: Akira Sawaoka, Masatada Araki, Shinroku Saito, Tamotsu Akashi
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Patent number: 4373952Abstract: A hot pressed intermetallic composite comprises titanium diboride and boron nitride and an effective amount of tungsten to reduce erosion of the composite and reduce the rate at which the electrical resistivity of the composite changes during its use.Type: GrantFiled: October 19, 1981Date of Patent: February 15, 1983Assignee: GTE Products CorporationInventor: Edward D. Parent
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Patent number: 4342595Abstract: Disclosed is an improved tool bit having 7 to 36 mole percent cubic boron nitride together with a metal carbide in a matrix containing a transition metal and a reactive metal sintering aid. A preferred tool bit consists by atomic percent of 52-79 tungsten carbide, 7-36 cubic boron nitride, 9-14 cobalt, and 0.2-2.5 zirconium. The new bits provide up to four times more life than tungsten carbide cobalt bits in machining nickel superalloys and are less costly than wholly cubic boron nitride bits.Tool bits containing tungsten carbide and cubic boron nitride particulates are fabricable at relatively moderate hot pressing pressures and temperatures (7-28 MPa, 1350.degree.-1500.degree. C.) if included therein is a sintering aid selected from the group consisting of titanium, zirconium, hafnium, aluminum or mixtures thereof. The aforementioned reactive metal aids are preferably added as hydrides.Type: GrantFiled: December 17, 1979Date of Patent: August 3, 1982Assignee: United Technologies CorporationInventor: Romeo G. Bourdeau
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Patent number: 4340432Abstract: A method of manufacturing stainless ferritic-austenitic steel having good corrosion properties, above all a good resistance to intercrystalline corrosion, a high yield strength and good hot-workability, which contains up to 0.10 percent of C, up to 4.0 percent of Si, up to 2.0 percent of Mn, from 20 to 30 percent of Cr, from 3 to 8 percent of Ni, from 1.0 to 6.0 percent of Mo, up to 0.5 percent of V and up to 4.0 percent of Cu, the remainder being iron and unavoidable impurities in unimportant amounts. The method includes the steps of preparing a melt of the steel with a nitrogen content higher than about 0.10 percent, preferably from about 0.15 to about 0.80 percent, and an austenite content not less than about 20 percent, preferably from about 20 percent to about 50 percent, gas atomizing said melt to form a powder, compacting said powder into a body, preferably employing an isostatic or semiisostatic compaction procedure, heat-treating said body at a temperature of from about 950.degree. to about 1250.Type: GrantFiled: May 11, 1981Date of Patent: July 20, 1982Assignee: ASEA AktiebolagInventor: Allan Hede
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Patent number: 4334928Abstract: A sintered compact for use in a machining tool comprising 80 to 10 volume % of a high pressure form of boron nitride, and the balance a matrix of at least one binder compound material selected from the group consisting of a carbide, nitride, carbonitride, boride or silicide of IVa and Va transition metal of the periodic table, their mixtures as well as the solid solution of these compounds; the matrix forming a continuous bonding structure in the sintered body.A method of producing the compact comprises preparing a mix of 80 to 10 volume % of a high pressure form of a boron nitride powder with 20 to 90 volume % of at least one powdered binder compound selected from the group consisting of a carbide, a nitride, a carbonitride, a boride and a silicide of a IVa, or a Va metal, mixtures thereof or solid solutions of these compounds, and sintering the mix under pressures more than 20 Kb at temperatures higher than 700.degree. C. for more than 3 minutes.Type: GrantFiled: February 8, 1980Date of Patent: June 15, 1982Assignee: Sumitomo Electric Industries, Ltd.Inventors: Akio Hara, Shuji Yazu
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Patent number: 4334926Abstract: A bearing material which is excellent in seizure resistance, wear resistance and conformability. The bearing material is prepared by sintering, on a backing steel sheet, a powder mixture consisting of Cu-Pb base alloy powder or its constituent metal powders and 1 to 30 wt. % of one or more members of hard material powders. The hard material powders mean the powders of Mo, Co, Fe.sub.3 P, Fe.sub.2 P, self-fusing alloys, FeB, Fe.sub.2 B, Fe-Cr, Fe-Mn, Fe-Si, Cr, W; SiC and other carbides, TiN and other nitrides, and SiO.sub.2 and other oxides. The bearing material of the present invention is characterized in that it has excellent sliding characteristics especially relative to the materials having rough surfaces.Type: GrantFiled: March 12, 1980Date of Patent: June 15, 1982Assignee: Taiho Kogyo Co., Ltd.Inventors: Kenichiro Futamura, Tatsuhiko Fukuoka
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Patent number: 4330333Abstract: A cutting tool material having a surprising combination of toughness, high speed wear resistance, strength, resistance to chipping, and resistance to thermal fatigue, consisting essentially of: 15 to 25% of a nickel cobalt binder; 3 to 6% molybdenum carbide; 2 to 5% VC; 15 to 25% TiC; 30 to 40% TiN; and 15 to 20% WC by weight.Type: GrantFiled: August 29, 1980Date of Patent: May 18, 1982Assignee: The Valeron CorporationInventor: Norman R. Gibbs
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Patent number: 4311524Abstract: According to the invention, a sintered iron-based friction material comprises copper, tin, graphite, pyroceramic, lead, and zinc sulphide, the ratio of the components expressed in percent by mass being as follows:copper: 1.5 to 3.0tin: 1.0 to 2.0zinc sulphide: 2.0 to 4.0graphite: 6.0 to 10.0pyroceramic: 2.0 to 5.0lead: 10.0 to 20.0the balance being iron.Type: GrantFiled: April 1, 1980Date of Patent: January 19, 1982Inventors: Valery A. Genkin, Alexandr A. Dmitrovich, Efim I. Fishbein
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Patent number: 4300952Abstract: An improvement in a cemented hard metal is disclosed. A molybdenum-tungsten-carbonitride is disclosed having the structure of tungsten carbide wherein the molybdenum and/or tungsten are at least partly substituted for by a metal selected from the group consisting of Cr, Nb, Ta, V, Re and mixtures thereof. The carbonitride may be mixed with a binder metal and sintered in a conventional manner to form a dense, substantially pore-free material.Type: GrantFiled: February 28, 1979Date of Patent: November 17, 1981Assignee: Sandvik AktiebolagInventors: Nils A. Ingelstrom, Leif A. E. Akesson
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Patent number: 4292078Abstract: Electrical contact material of this invention consists of 10 to 20 percent by weight of nickel, 0.05 to 2 percent by weight of titanium boride and the balance tungsten. Conventionally, nickel-tungsten alloy shows poor mechanical properties (e.g. brittleness) although the alloy shows high oxidation resistance and can be produced in an inexpensive way. Inclusion of titanium boride greatly improves the mechanical properties of such alloy, thereby enabling the cheap production of electrical contact material which has sufficient practical use.Type: GrantFiled: November 5, 1979Date of Patent: September 29, 1981Assignee: Nippon Tungsten Co., Ltd.Inventors: Sinya Honda, Takeshi Komura, Naomi Sugita, Tatuya Okamoto
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Patent number: 4246027Abstract: A novel sintered body suitable for use as a refractory or abrasive material s proposed with high mechanical strengths and hardness even at elevated temperatures. The sintered body of the invention is prepared by subjecting a powder mixture composed of titanium diboride as the base component, a nickel phosphide or nickel-phosphorus alloy and a third component selected from metals of chromium, molybdenum, niobium, tantalum, hafnium, rhenium and aluminum as well as diborides thereof, and the inventive sintered bodies are very advantageous in their industrial production owing to the relatively low sintering temperature of 2000.degree. C. or lower and in their high performance at elevated temperatures to find wide applications in the fields of high-temperature engineering and as a material for the high-speed cutting tools.Type: GrantFiled: March 23, 1979Date of Patent: January 20, 1981Assignee: Director-General of the Agency of Industrial Science and TechnologyInventors: Tadahiko Watanabe, Katsushige Nakazono, Yunosuke Tokuhiro
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Patent number: 4243414Abstract: A slidable member for a prime mover made of an abrasion resistant liquid-phase sintered alloy, containing 0.5 to 4.0% by weight of carbon, 8.0 to 30.0% by weight of chromium, and 0.1 to 5.0% by weight of at least one of phosphorus, boron and silicon which permit liquid-phase sintering at not more than 1,250.degree. C., and the balance iron. The sintered alloy has 0.2 to 10% by volume of sintering pores at least 40% of which consist of pores having a pore size of not more than 150.mu..Type: GrantFiled: October 27, 1978Date of Patent: January 6, 1981Assignee: Nippon Piston Ring Co., Ltd.Inventors: Kentaro Takahashi, Yoshikatsu Nakamura, Masajiro Takeshita
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Patent number: 4239536Abstract: This invention relates to a surface-coated sintered hard body comprising an alloy consisting of at least one of carbides and carbonitrides of Group IVa, Va and VIa transition metals, cemented by at least one of metals and alloys, and two interior and exterior coated layers, the interior layer being a monolayer or multilayer consisting of at least one of carbides, carbonitrides and nitrides of Group IVa, Va and VIa transition metals, in which a part of the non-metallic element or elements are optionally replaced by oxygen, and at least one layer of the interior layer consisting of at least one of carbides, carbonitrides and nitrides of Group IVa, Va and VIa transition metals, in which a part or all of the non-metallic element or elements are replaced by boron, and the exterior layer consisting of at least one of aluminum oxide, zirconium oxide and mixtures or compounds thereof.Type: GrantFiled: September 8, 1978Date of Patent: December 16, 1980Assignee: Sumitomo Electric Industries, Ltd.Inventors: Takaharu Yamamoto, Tsuyoshi Asai, Naoji Fujimori, Masa-aki Tobioka
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Patent number: 4235630Abstract: A wear-resistant, molybdenum-iron boride alloy (10) has a microstructure of a primary boride phase (12) and a matrix phase (14). The primary boride phase (12) comprises molybdenum alloyed with iron and boron, and the matrix phase (14) comprises one of iron-boron in iron and iron-molybdenum in iron and has a hardness less than that of the primary boride phase (12). The subject alloy finds particular utility in a composite material on a ground-engaging tool such as a cutting edge or ripper tooth, and can also be used for wear-resistant coatings, machine tool inserts, bearings, and the like.Type: GrantFiled: September 5, 1978Date of Patent: November 25, 1980Assignee: Caterpillar Tractor Co.Inventor: B. Naga P. Babu
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Patent number: 4230491Abstract: An internal combustion engine tappet comprising a sintered powdered metal wear resistant composition having a matrix formed from iron powder, carbon in the range of 0.50-1.0% by weight, and a ferroalloy powder with a mesh size of +50-325 acting as a nucleus for diffusion of the alloying metal into the surrounding iron particles. The alloying metal in the composition is in the range of 1-10% by weight and is selected from the group consisting of chromium, titanium, boron, vanadium, columbium, molybdenum, tantalum and tungsten. The iron, carbon and ferroalloy are briquetted at a pressure of 40-60 tons/sq.in. and sintered, in solid phase, at a temperature of 2000.degree.-2100.degree. F. in a reducing atmosphere. The resulting product is heterogeneous and has hard ferroalloy nuclei and interconnected porosity with a density at the tappet wear surface of approximately 6.8-7.0 gm/cc.Type: GrantFiled: January 8, 1979Date of Patent: October 28, 1980Assignee: Stanadyne, Inc.Inventor: Robert C. Behnke
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Patent number: 4229217Abstract: The production of highly porous sintered bodies useful for the manufacture of electrolytic capacitors by using as a lubricant for the base metal powder, usually tantalum, about 0.01 to about 10% by weight of an inorganic lubricant, namely nitrides of boron or silicon.Type: GrantFiled: November 20, 1978Date of Patent: October 21, 1980Assignee: Hermann C. StarchInventor: Reinhard Hahn
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Patent number: 4227703Abstract: An improved gas seal between a stationary member and a movable member, one of which includes an abrasive tipped projection directed toward a surface of the other, for example a turbine engine blade and a cooperating shroud member, is provided through an improvement in the abrasive tip. Such improved tip of the projection is a composite of inner and outer tip portions, the inner portion comprising an alloy resistant to oxidation, sulfidation and thermal fatigue at operating temperatures and the outer tip portion comprising a matrix entrapping a plurality of abrasive particles which protrude from the matrix toward the surface of the other member. The inner tip portion is bonded with the metallic body of the projection and the outer tip portion is deposited on the inner tip portion.Type: GrantFiled: November 27, 1978Date of Patent: October 14, 1980Assignee: General Electric CompanyInventors: Kenneth W. Stalker, John W. Zelahy, Norman P. Fairbanks
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Patent number: 4224380Abstract: In one embodiment, a compact for tools, such as cutting, drilling and shaping tools, consists essentially of self-bonded abrasive particles. The bonded particles define a substantially continuous interconnected network of pores, dispersed throughout the compact. The method for making such a compact comprises the steps of bonding a mass of abrasive particles, aided by a sintering aid material, under high temperatures and pressures (HP/HT) to form an abrasive body comprised of said particles in a self-bonded form and said material infiltrated throughout the body. The body is then treated to remove substantially all infiltrated material, thereby to produce a compact consisting essentially of the self-bonded abrasive particles. In another embodiment, a composite compact which is made in a similar manner to the first embodiment consists essentially of a layer of self-bonded abrasive particle and a substrate layer (preferably of cemented carbide) bonded to the abrasive particle layer.Type: GrantFiled: March 28, 1978Date of Patent: September 23, 1980Assignee: General Electric CompanyInventors: Harold P. Bovenkerk, Paul D. Gigl
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Patent number: 4217141Abstract: A boron-containing powder in an amount of up to 25% by weight is mixed with a metal powder (e.g. steel) and the mixture is compacted in a mold to at least 80% of theoretical density. The compact is sintered at 700.degree. to 1300.degree. C. under a protective atmosphere or vacuum to yield a hard, wear-resistant body.Type: GrantFiled: March 8, 1978Date of Patent: August 12, 1980Assignee: Sintermetallwerk Krebsoge GmbHInventor: Karl Schrittwieser
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Patent number: 4148494Abstract: A rotary labyrinth gas seal between a rotating member and a stationary member, one of which includes at least one seal tooth projecting toward a surface of the other member is improved through the provision of an abrasive tip on the projecting tooth. Such abrasive tip comprises an electrodeposited metal matrix which entraps a plurality of abrasive particles protruding from the tip, the thickness of the matrix being less than the longest dimension of the abrasive particles protruding from the tip.Type: GrantFiled: December 21, 1977Date of Patent: April 10, 1979Assignee: General Electric CompanyInventors: John W. Zelahy, Norman P. Fairbanks, Robert E. Maegly
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Patent number: 4140527Abstract: A nitrogen containing powder metallurgical tool steel comprising at least 0.40% N, 1.6 - 15% V, C in an amount satisfying the relationship of0.2 + 0.2 V(%).ltoreq.(C + N)<0.5 + 0.2 V(%),at least one element selected from the group consisting of up to 15% Cr, up to 10% Mo, up to 20% W and up to 15% Co, with balance iron.Type: GrantFiled: May 23, 1977Date of Patent: February 20, 1979Assignee: Kobe Steel, Ltd.Inventors: Nobuyasu Kawai, Katuhiko Honma, Hirofumi Fujimoto, Hiroshi Takigawa, Tsuneo Tatsuno
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Patent number: 4138252Abstract: The invention relates to a compact containing crystals of cubic boron nitride and a binder containing at least one of the intermetallic compounds selected from the group consisting of Ti.sub.2 Cu, Ti, Cu, Ti.sub.2 Cu.sub.3, TiCu.sub.3, Zr.sub.2 Cu, ZrCu, Zr.sub.2 Cu.sub.3, and ZrCu.sub.3. A method for the production of this compact comprises the steps of forming a composition including crystals of cubic boron nitride and a binder containing at least one of the intermetallic compounds selected from the group consisting of Ti.sub.2 Cu, TiCu, Ti.sub.2 Cu.sub.3, TiCu.sub.3, Zr.sub.2 Cu, ZrCu, Zr.sub.2 Cu.sub.3, and ZrCu.sub.3, and subjecting the obtained composition of cubic boron nitride and the binder to a pressure within the range of 10 to 50 kilobars and a temperature within the range of 1,000.degree. C. to 1,400.degree. C. The advantage of the present invention consists in providing a simple method for the production of the compact which possesses retained strength and cutting properties.Type: GrantFiled: June 10, 1977Date of Patent: February 6, 1979Inventors: Leonid F. Vereschagin, Aik A. Semerchian, Tamara T. Gankevich, Mikhail E. Dmitriev, Vitaly P. Modenov
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Patent number: 4128132Abstract: A wear-resistant alloy is inlaid in a channel along the undersurface of a cutting edge of a ground-engaging implement. The wear-resistant alloy is in the form of individual blocks which are brazed within the channel. The joints between contiguous blocks are non-parallel to the general direction of travel of the ground-engaging implement for improved tool wear.Type: GrantFiled: September 1, 1977Date of Patent: December 5, 1978Assignee: Caterpillar Tractor Co.Inventors: Lowell J. Moen, Harris S. Olson
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Patent number: 4123266Abstract: Articles of high performance chromium-containing cobalt-base alloys sintered from powder contain boron in amounts between about 0.1 and 1.0%. The addition of boron widens the range of sintering temperatures sufficiently to make possible commercial production of articles of compositions which otherwise are difficult or impossible to sinter.Type: GrantFiled: January 19, 1978Date of Patent: October 31, 1978Assignee: Cabot CorporationInventors: Edward M. Foley, Dennis G. Dreyer, Herbert E. Rogers, Jr.
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Patent number: 4121929Abstract: A nitrogen containing high speed steel produced by powder metallurgical process, which comprises at least 0.40% N, 3.0-15% V, C in an amount satisfying the relationship of 1.0 + 0.2V (%) .ltoreq. (C + N) .ltoreq. 1.5 + 0.2V (%), at least one element selected from the group consisting of up to 15% Cr, up to 10% Mo, up to 20% W, and up to 15% Co, with balance iron.Type: GrantFiled: February 11, 1977Date of Patent: October 24, 1978Assignee: Kobe Steel, Ltd.Inventors: Nobuyasu Kawai, Katuhiko Honma, Hirofumi Fujimoto, Hiroshi Takigawa, Minoru Hirano, Masaru Ishii
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Patent number: 4120719Abstract: The present invention relates to a hard cemented carbonitride alloy for cutting tools, which comprises 97 to 75% by weight of a hard phase and 3 to 25% by weight of a binder metal, the hard phase consisting of metallic components of titanium as a main component, 5 to 40% by weight of one or more of tungsten and molybdenum and 3 to 40% by weight of tantalum and non-metallic components of carbon and nitrogen, the proportion of nitrogen being 5 to 40% by weight of the non-metallic components and the binder metal being at least one element selected from the group consisting of iron, cobalt and nickel.Type: GrantFiled: December 6, 1976Date of Patent: October 17, 1978Assignee: Sumitomo Electric Industries, Ltd.Inventors: Toshio Nomura, Tsuyoshi Asai, Takaharu Yamamoto, Akio Hara
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Patent number: 4113920Abstract: Spheroidal particles of wear-resistant alloy comprising boron, chromium and iron having maximum hardness for a given composition are produced by the rapid cooling of a molten alloy mixture. The resultant solid particles are then incorporated into a composite alloy wherein the solid particles are held together with a matrix of different material from the alloy. Inserts of the composite wear-resistant alloy are useful in producing long wearing tools.Type: GrantFiled: October 18, 1976Date of Patent: September 12, 1978Assignee: Caterpillar Tractor Co.Inventors: Eugene L. Helton, Preston L. Gale, Lowell J. Moen, Robert C. Mueller, Walker L. Pierce, Jr., Henry J. Vermillion, Jr.
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Patent number: 4095978Abstract: The invention relates to hard fritted alloys and a method for their preparation. These alloys essentially contain cubic tantalum nitride with a binder based on carbides or nitrides of metal of groups IV-A and V-A, likewise of cubic structure, fritted at a temperature from 1400.degree. to 1700.degree. C at a nitrogen pressure from 30 to 200 bars. They are particularly appropriate for the manufacture of tools for cutting metal.Type: GrantFiled: November 5, 1976Date of Patent: June 20, 1978Assignee: Ugine CarboneInventor: Richard Kieffer