公开(公告)号：US07954569B2

公开(公告)日：2011-06-07

申请号：US11116752

申请日：2005-04-28

Applicant: Prakash K. Mirchandani ,  Jimmy W. Eason ,  James J. Oakes ,  James C. Westhoff ,  Gabriel B. Collins ,  John H. Stevens ,  Steven G. Caldwell ,  Alfred J. Mosco

Inventor： Prakash K. Mirchandani ,  Jimmy W. Eason ,  James J. Oakes ,  James C. Westhoff ,  Gabriel B. Collins ,  John H. Stevens ,  Steven G. Caldwell ,  Alfred J. Mosco

IPC: E21B10/02

CPC classification number: E21B10/46 ,  B22F2005/001 ,  B22F2998/00 ,  C22C1/1068 ,  C22C29/00 ,  C22C29/005 ,  C22C29/067 ,  B22F7/06

Abstract: The present invention relates to compositions and methods for forming a bit body for an earth-boring bit. The bit body may comprise hard particles, wherein the hard particles comprise at least one of carbide, nitride, boride, and oxide and solid solutions thereof, and a binder binding together the hard particles. The binder may comprise at least one metal selected from cobalt, nickel, and iron, and, optionally, at least one melting point reducing constituent selected from a transition metal carbide in the range of 30 to 60 weight percent, boron up to 10 weight percent, silicon up to 20 weight percent, chromium up to 20 weight percent, and manganese up to 25 weight percent, wherein the weight percentages are based on the total weight of the binder. In addition, the hard particles may comprise at least one of (i) cast carbide (WC+W2C) particles, (ii) transition metal carbide particles selected from the carbides of titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten, and (iii) sintered cemented carbide particles.

Abstract translation: 本发明涉及用于形成钻头的钻头体的组合物和方法。 钻头体可以包括硬颗粒，其中硬颗粒包括碳化物，氮化物，硼化物及其氧化物和固体溶液中的至少一种以及将硬颗粒结合在一起的粘合剂。 粘合剂可以包含选自钴，镍和铁中的至少一种金属，以及任选地至少一种选自30-60重量％范围内的过渡金属碳化物的熔点降低成分，至多10重量％的硼 ，高达20重量％的硅，至多20重量％的铬，以及至多25重量％的锰，其中重量百分数是基于粘合剂的总重量。 此外，硬质颗粒可以包括（i）碳化钨（WC + W2C）颗粒，（ii）过渡金属碳化物颗粒中的至少一种，其选自钛，铬，钒，锆，铪，钽，钼， 铌和钨，和（iii）烧结的硬质合金颗粒。

公开(公告)号：US20110011965A1

公开(公告)日：2011-01-20

申请号：US12502277

申请日：2009-07-14

Applicant: Prakash K. Mirchandani ,  Morris E. Chandler

Inventor： Prakash K. Mirchandani ,  Morris E. Chandler

IPC: B02C15/00 ,  B32B15/04 ,  B32B5/00 ,  B22F7/04 ,  B32B37/12 ,  B22D19/14 ,  B22D19/00 ,  B22D25/00 ,  B23K31/02 ,  B23P11/00

CPC classification number: B22F7/062 ,  B02C4/305 ,  C22C1/1068 ,  C22C29/06 ,  Y10T29/49545 ,  Y10T29/49826 ,  Y10T156/10 ,  Y10T428/12097 ,  Y10T428/24 ,  Y10T428/249921

Abstract: An article in the form of one of a plate, a sheet, a cylinder, and a portion of a cylinder, which is adapted for use as at least a portion of a wear resistant working surface of a roll is disclosed. The article includes a metal matrix composite comprising a plurality of inorganic particles dispersed in a matrix material. The matrix material includes at least one of a metal and a metal alloy, wherein the melting temperature of the inorganic particles is greater than the melting temperature of the matrix material. A plurality of hard elements are embedded in the metal matrix composite. The wear resistance of the metal matrix composite is less than the wear resistance of the hard elements, and the metal matrix composite preferentially wears away when the article is in use, thereby providing or preserving gaps between each of the plurality of hard elements at a working surface of the article.

Abstract translation: 公开了一种适于用作辊的耐磨工作表面的至少一部分的板，片，圆筒和圆筒的一部分形式的制品。 该制品包括包含分散在基质材料中的多个无机颗粒的金属基质复合材料。 基质材料包括金属和金属合金中的至少一种，其中无机颗粒的熔融温度大于基质材料的熔融温度。 多个硬元素嵌入金属基质复合材料中。 金属基复合材料的耐磨性小于硬质元件的耐磨性，并且当使用该制品时，金属基复合材料优先磨损，从而在工作时提供或保留多个硬元件中的每一个之间的间隙 表面的物品。

公开(公告)号：US07513320B2

公开(公告)日：2009-04-07

申请号：US11013842

申请日：2004-12-16

Applicant: Prakash K. Mirchandani ,  Alfred J. Mosco

Inventor： Prakash K. Mirchandani ,  Alfred J. Mosco

IPC: E21B10/00

CPC classification number: B22F7/06 ,  B22F2005/001 ,  B22F2998/00 ,  E21B10/52 ,  C22C29/005 ,  C22C29/067

Abstract: This invention relates to cutting inserts for earth boring bits comprising a cutting zone, wherein the cutting zone comprises first cemented hard particles and a body zone, wherein the body zone comprises second cemented hard particles. The first cemented hard particles may differ in at least one property from the second cemented hard particles. As used herein, the cemented hard particles means a material comprising hard particles in a binder. The hard particles may be at least one of a carbide, a nitride, a boride, a silicide, an oxide, and solid solutions thereof and the binder may be at least one metal selected from cobalt, nickel, iron and alloys of cobalt, nickel or iron.

Abstract translation: 本发明涉及用于包括切割区域的钻孔钻头的切削刀片，其中切割区域包括第一粘结硬质颗粒和体区，其中主体区域包括第二粘结硬质颗粒。 至少一个性质的第一个胶结硬质颗粒可能与第二个胶结硬质颗粒不同。 如本文所用，胶结硬颗粒是指在粘合剂中包含硬颗粒的材料。 硬颗粒可以是碳化物，氮化物，硼化物，硅化物，氧化物和固溶体中的至少一种，并且粘合剂可以是选自钴，镍，铁和钴，镍的合金中的至少一种金属 或铁。

公开(公告)号：US20080302576A1

公开(公告)日：2008-12-11

申请号：US12192292

申请日：2008-08-15

Applicant: Prakash K. Mirchandani ,  Jimmy W. Eason ,  James J. Oakes ,  James C. Westhoff ,  Gabriel B. Collins

Inventor： Prakash K. Mirchandani ,  Jimmy W. Eason ,  James J. Oakes ,  James C. Westhoff ,  Gabriel B. Collins

IPC: E21B10/00

CPC classification number: E21B10/46 ,  B22F2005/001 ,  B22F2998/00 ,  C22C1/1068 ,  C22C29/00 ,  C22C29/005 ,  C22C29/067 ,  B22F7/06

Abstract: The present invention relates to compositions and methods for forming a bit body for an earth-boring bit. The bit body may comprise hard particles, wherein the hard particles comprise at least one carbide, nitride, boride, and oxide and solid solutions thereof, and a binder binding together the hard particles. The binder may comprise at least one metal selected from cobalt, nickel, and iron, and at least one melting point-reducing constituent selected from a transition metal carbide in the range of 30 to 60 weight percent, boron up to 10 weight percent, silicon up to 20 weight percent, chromium up to 20 weight percent, and manganese up to 25 weight percent, wherein the weight percentages are based on the total weight of the binder. In addition, the hard particles may comprise at least one of (i) cast carbide (WC+W2C) particles, (ii) transition metal carbide particles selected from the carbides of titanium, chromium, vanadium, zirconium, hafnium, tantalum, molybdenum, niobium, and tungsten, and (iii) sintered cemented carbide particles.

Abstract translation: 本发明涉及用于形成钻头的钻头体的组合物和方法。 钻头体可以包括硬质颗粒，其中硬颗粒包含至少一种碳化物，氮化物，硼化物及其氧化物和固体溶液，以及将硬颗粒结合在一起的粘合剂。 粘合剂可以包含选自钴，镍和铁中的至少一种金属，以及至少一种选自30-60重量％范围的过渡金属碳化物，至多10重量％的熔点降低成分，硅， 至多20重量％，最高达20重量％的铬，和至多25重量％的锰，其中重量百分数是基于粘合剂的总重量。 此外，硬颗粒可以包括（i）碳化钨（WC + W2C）颗粒，（ii）过渡金属碳化物颗粒中的至少一种，其选自钛，铬，钒，锆，铪，钽，钼， 铌和钨，和（iii）烧结的硬质合金颗粒。

公开(公告)号：US5338506A

公开(公告)日：1994-08-16

申请号：US993790

申请日：1992-12-21

Applicant: John W. Friederichs ,  Prakash K. Mirchandani ,  Paul J. Krudy

Inventor： John W. Friederichs ,  Prakash K. Mirchandani ,  Paul J. Krudy

IPC: C22C29/08 ,  B22F1/00

CPC classification number: C22C29/08

Abstract: A process for making a non magnetic Ni-WC cemented carbide composition and articles made from the same. The process comprises:(a) dewaxing a green Ni-WC cemented carbide substrate in the presence of hydrogen gas at a pressure less than about 1000 torr and at a sufficient flow rate and a sufficient time to affect the saturation magnetization and magnetic permeability of the Ni-WC cemented carbide substrate;(b) pumping out the hydrogen gas and introducing argon at a pressure in the range of about 1 torr to 1000 torr;(c) increasing the temperature up to the sintering temperature to facilitate sintering of the Ni-WC cemented carbide substrate; and;(d) cooling the furnace to room temperature.The articles made according to this invention are useful as wear parts for electronic instruments and as punches form aluminum beverage cans.

Abstract translation: 制造非磁性Ni-WC硬质合金组合物的方法和由其制成的制品。 该方法包括：（a）在氢气存在下，在小于约1000托的压力下，以足够的流速和足够的时间使绿色Ni-WC硬质合金基体脱蜡，以影响饱和磁化强度和磁导率 Ni-WC硬质合金基体; （b）抽出氢气并在约1托至1000托的压力下引入氩; （c）将温度升高至烧结温度以促进Ni-WC硬质合金基体的烧结; 和; （d）将炉冷却至室温。 根据本发明制成的制品可用作电子仪器的磨损部件和用作铝制饮料罐的冲头。

公开(公告)号：US09016406B2

公开(公告)日：2015-04-28

申请号：US13598744

申请日：2012-08-30

Applicant: Heath C. Coleman ,  Prakash K. Mirchandani

Inventor： Heath C. Coleman ,  Prakash K. Mirchandani

IPC: C22C29/08 ,  E21B10/56 ,  C22C29/00 ,  B22F5/00

CPC classification number: C22C29/08 ,  B22F2005/001 ,  C22C29/005 ,  E21B10/56

Abstract: A cutting insert for an earth-boring bit comprises a cemented carbide material. The cemented carbide material comprises a plurality of tungsten carbide grains, and a plurality of cubic carbide grains comprising at least one of titanium carbide, vanadium carbide, zirconium carbide, hafnium carbide, niobium carbide, tantalum carbide, mixtures thereof, and solid solutions thereof. The cemented carbide material also comprises a binder including at least one of cobalt, a cobalt alloy, nickel, a nickel alloy, iron, and an iron alloy. Embodiments of the cutting inserts are suitable for use on, for example, rotary cone earth-boring bits and fixed cutter earth-boring bits. A hybrid cemented carbide material comprising first regions of cemented carbide based on tungsten carbide and cobalt, dispersed in a continuous region of cemented carbide material comprising cubic carbides also is disclosed and is useful in cutting inserts of earth-boring bits.

Abstract translation: 用于钻头的切削刀片包括硬质合金材料。 硬质合金材料包括多个碳化钨颗粒，以及包含碳化钛，碳化钒，碳化锆，碳化铪，碳化铌，碳化钽，其混合物和其固体溶液中的至少一种的多个立方晶碳颗粒。 硬质合金材料还包括包含钴，钴合金，镍，镍合金，铁和铁合金中的至少一种的粘合剂。 切削刀片的实施例适用于例如旋转锥形钻孔钻头和固定刀具钻孔钻头。 公开了一种混合硬质合金材料，其包含分散在包含立方碳化物的硬质合金材料的连续区域中的基于碳化钨和钴的硬质合金的第一区域，并且可用于切削钻孔钻头。

公开(公告)号：US08876443B2

公开(公告)日：2014-11-04

申请号：US13550690

申请日：2012-07-17

Applicant: Prakash K. Mirchandani

Inventor： Prakash K. Mirchandani

IPC: B23B27/14 ,  B23B51/02 ,  C22C29/06 ,  C22C1/05 ,  B22F7/06 ,  B22F5/00

CPC classification number: C22C1/051 ,  B22F7/062 ,  B22F2005/001 ,  C22C29/06 ,  Y10T407/1946 ,  Y10T407/26 ,  Y10T407/27 ,  Y10T408/78 ,  Y10T408/9097

Abstract: Composite articles, including composite rotary cutting tools and composite rotary cutting tool blanks, and methods of making the articles are disclosed. The composite article includes an elongate portion. The elongate portion includes a first region composed of a first cemented carbide, and a second region autogenously bonded to the first region and composed of a second cemented carbide. At least one of the first cemented carbide and the second cemented carbide is a hybrid cemented carbide that includes a cemented carbide dispersed phase and a cemented carbide continuous phase. At least one of the cemented carbide dispersed phase and the cemented carbide continuous phase includes at least 0.5 percent by weight of cubic carbide based on the weight of the phase including the cubic carbide.

Abstract translation: 公开了复合制品，包括复合旋转切割工具和复合旋转切割工具坯料以及制造制品的方法。 复合制品包括细长部分。 细长部分包括由第一硬质合金构成的第一区域和自发地结合到第一区域并由第二硬质合金构成的第二区域。 第一硬质合金和第二硬质合金中的至少一个是包括硬质合金分散相和硬质合金连续相的混合硬质合金。 硬质合金分散相和硬质合金连续相中的至少一种包括至少0.5重量％的基于包括立方晶碳的相的重量的立方晶碳。

公开(公告)号：US08858870B2

公开(公告)日：2014-10-14

申请号：US13491649

申请日：2012-06-08

Applicant: Prakash K. Mirchandani ,  Morris E. Chandler ,  Michale E. Waller ,  Heath C. Coleman

Inventor： Prakash K. Mirchandani ,  Morris E. Chandler ,  Michale E. Waller ,  Heath C. Coleman

IPC: B22F3/15 ,  E21B10/42 ,  B22F3/26 ,  C22C29/08 ,  B22F3/10 ,  B22F5/00

CPC classification number: E21B10/42 ,  B22F3/1035 ,  B22F3/26 ,  B22F2005/001 ,  C22C29/08 ,  Y10T428/12146 ,  Y10T428/12486

Abstract: A method of making an article of manufacture includes positioning a cemented carbide piece comprising at least 5% of the total volume of the article of manufacture, and, optionally, a non-cemented carbide piece in a void of a mold in predetermined positions to partially fill the void and define an unoccupied space. Inorganic particles are added to the mold to partially fill the unoccupied space and provide a remainder space. The cemented carbide piece, the non-cemented carbide piece if present, and the hard particles are heated and infiltrated with a molten metal or a metal alloy. The melting temperature of the molten metal or the metal alloy is less than the melting temperature of the inorganic particles. The molten metal or metal alloy in the remainder space solidifies and binds the cemented carbide piece, the non-cemented carbide piece if present, and the inorganic particles to form the article of manufacture.

Abstract translation: 制造制品的方法包括将包含制品的总体积的至少5％的硬质合金片和任选地将非硬质合金片放置在预定位置的模具空隙中以部分地 填补空白并定义空闲空间。 将无机颗粒添加到模具中以部分填充未占据的空间并提供剩余空间。 将硬质合金片，非硬质合金片（如果存在）和硬质颗粒用熔融金属或金属合金加热浸渍。 熔融金属或金属合金的熔融温度小于无机粒子的熔融温度。 剩余空间中的熔融金属或金属合金固化并结合硬质合金片，非硬质合金片（如果存在）和无机颗粒以形成制品。

公开(公告)号：US20120321498A1

公开(公告)日：2012-12-20

申请号：US13591282

申请日：2012-08-22

Applicant: Prakash K. Mirchandani

Inventor： Prakash K. Mirchandani

IPC: B22F7/02

CPC classification number: C22C1/051 ,  B22F7/062 ,  B22F2005/001 ,  C22C29/06 ,  Y10T407/1946 ,  Y10T407/26 ,  Y10T407/27 ,  Y10T408/78 ,  Y10T408/9097

Abstract: Composite articles, including composite rotary cutting tools and composite rotary cutting tool blanks, and methods of making the articles are disclosed. The composite article includes an elongate portion. The elongate portion includes a first region composed of a first cemented carbide, and a second region autogenously bonded to the first region and composed of a second cemented carbide. At least one of the first cemented carbide and the second cemented carbide is a hybrid cemented carbide that includes a cemented carbide dispersed phase and a cemented carbide continuous phase. At least one of the cemented carbide dispersed phase and the cemented carbide continuous phase includes at least 0.5 percent by weight of cubic carbide based on the weight of the phase including the cubic carbide.

Abstract translation: 公开了复合制品，包括复合旋转切割工具和复合旋转切割工具坯料以及制造制品的方法。 复合制品包括细长部分。 细长部分包括由第一硬质合金构成的第一区域和自发地结合到第一区域并由第二硬质合金构成的第二区域。 第一硬质合金和第二硬质合金中的至少一个是包括硬质合金分散相和硬质合金连续相的混合硬质合金。 硬质合金分散相和硬质合金连续相中的至少一种包括至少0.5重量％的基于包括立方晶碳的相的重量的立方晶碳。

公开(公告)号：US08318063B2

公开(公告)日：2012-11-27

申请号：US11585408

申请日：2006-10-24

Applicant: Prakash K. Mirchandani ,  David J. Wills ,  Michale E. Waller ,  Jeffrey L. Weigold ,  Billy D. Swearengin

Inventor： Prakash K. Mirchandani ,  David J. Wills ,  Michale E. Waller ,  Jeffrey L. Weigold ,  Billy D. Swearengin

IPC: B22F7/02

CPC classification number: B29C47/06 ,  B21C23/22 ,  B21C25/02 ,  B22F5/10 ,  B22F7/06 ,  B22F2005/001 ,  B22F2005/004 ,  B22F2998/00 ,  B22F2998/10 ,  Y10T407/19 ,  Y10T407/1904 ,  Y10T408/907 ,  Y10T428/131 ,  Y10T428/1317 ,  B22F3/20 ,  B22F3/04 ,  B22F5/106

Abstract: A method of forming a composite article by injecting at least two composite materials comprising metal carbides into a mold to form a green compact is disclosed. The composite materials may be metal powders comprising a binder metal, a hard particle. The composite material may further comprise a plastic binder. The two different composite materials are injected into the mold to form the green compact. Additionally, the composite materials may be injected through a die before entering the mold. In a specific embodiment, the die forms at least one internal channel within the green compact.

Abstract translation: 公开了一种通过将包含金属碳化物的至少两种复合材料注入模具以形成生坯来形成复合制品的方法。 复合材料可以是包含粘合剂金属，硬质颗粒的金属粉末。 复合材料还可以包括塑料粘合剂。 将两种不同的复合材料注入模具中以形成生坯。 此外，复合材料可以在进入模具之前通过模具注入。 在一个具体的实施例中，模具在绿色压实体内形成至少一个内部通道。