公开(公告)号：US06511265B1

公开(公告)日：2003-01-28

申请号：US09460540

申请日：1999-12-14

Applicant: Prakash K. Mirchandani ,  Bruce A. Keller

Inventor： Prakash K. Mirchandani ,  Bruce A. Keller

IPC: B23B5100

CPC classification number: B22F7/06 ,  B22F2005/001 ,  B22F2998/00 ,  B22F2998/10 ,  B23P15/28 ,  Y10T407/1946 ,  Y10T407/26 ,  Y10T407/27 ,  Y10T408/905 ,  B22F3/1233 ,  B22F3/04 ,  B22F3/14

Abstract: A composite rotary tool includes at least first and second regions comprising first and second materials, respectively. The first and second regions are autogenously bonded and differ with respect to at least one characteristic such as, for example, modulus of elasticity, hardness, wear resistance, fracture toughness, tensile strength, corrosion resistance, coefficient of thermal expansion, or coefficient of thermal conductivity. A method for producing the composite rotary tool includes placing a first metallurgical powder into a first region of a void of a mold, and placing a second metallurgical powder into a second region of the void. The first metallurgical powder differs from the second metallurgical powder, and at least a portion of the first metallurgical is brought into contact with the second metallurgical powder. The mold is compressed to consolidate the first and second metallurgical powders to form a compact, and the compact subsequently is sintered.

Abstract translation: 复合旋转工具分别包括包括第一和第二材料的至少第一和第二区域。 第一和第二区域是自粘结的，并且相对于至少一个特性例如弹性模量，硬度，耐磨性，断裂韧性，拉伸强度，耐腐蚀性，热膨胀系数或热膨胀系数 电导率。 一种生产复合旋转工具的方法包括将第一冶金粉末放置在模具空隙的第一区域中，并将第二冶金粉末放置在空隙的第二区域中。 第一冶金粉末与第二冶金粉末不同，第一冶金的至少一部分与第二冶金粉末接触。 将模具压缩以固结第一和第二冶金粉末以形成压块，随后将该压块烧结。

公开(公告)号：US5736658A

公开(公告)日：1998-04-07

申请号：US501485

申请日：1995-07-12

Applicant: Prakash K. Mirchandani ,  Les Kastura

Inventor： Prakash K. Mirchandani ,  Les Kastura

IPC: B21D37/01 ,  C22C29/06 ,  C22C29/02

CPC classification number: C22C29/06 ,  B21D37/01 ,  C22C29/067

Abstract: A resilient and corrosion and wear resistant component of tooling preferably used in the deep-drawing of aluminum and steel cans is disclosed. The tooling is comprised of a distinctive nickel-bonded cemented carbide having a density less than 13 grams per cubic centimeter, a hardness of at least 88 R.sub.a, a minimum transverse rupture strength of 250,000 p.s.i. and exhibiting essentially non-magnetic behavior. Preferred compositions for the material of the tooling are also given.

Abstract translation: 公开了优选用于铝和钢罐的深冲压的工具的弹性和耐腐蚀和耐磨部件。 该工具由密度小于13克/立方厘米，硬度至少为88 Ra，最小横向断裂强度为250,000 p.s.i的独特的镍粘合硬质合金组成。 并表现出基本上非磁性的行为。 还给出了用于模具材料的优选组合物。

公开(公告)号：US5171381A

公开(公告)日：1992-12-15

申请号：US662721

申请日：1991-02-28

Applicant: Prakash K. Mirchandani ,  Arunkumar S. Watwe ,  Walter E. Mattson

Inventor： Prakash K. Mirchandani ,  Arunkumar S. Watwe ,  Walter E. Mattson

IPC: C22C21/00 ,  C22C1/04 ,  C22C1/10 ,  C22C32/00

CPC classification number: C22C1/0416 ,  C22C1/1084 ,  C22C32/0036

Abstract: The invention comprises an alloy having improved intermediate temperature properties at temperatures up to about 316.degree. C. The alloy contains (by weight percent) about 1-6% X contained as an intermetallic phase in the form of Al.sub.3 X. X is at least one selected from the group consisting of Nb, Ti and Zr. The alloy also contains 0.1-4% strengthener selected from the group consisting of Si and Mg. In addition, the alloy contains about 1-4% C and 0.1-2% O present as aluminum carbides and oxides for grain stabilization.

公开(公告)号：US5169461A

公开(公告)日：1992-12-08

申请号：US711633

申请日：1991-06-06

Applicant: Arunkumar S. Watwe ,  Prakash K. Mirchandani ,  Walter E. Mattson

Inventor： Arunkumar S. Watwe ,  Prakash K. Mirchandani ,  Walter E. Mattson

IPC: C22C1/00 ,  C22C1/04 ,  C22C1/10 ,  C22C21/00 ,  C22C32/00

CPC classification number: C22C32/0036 ,  C22C1/0416 ,  C22C1/1084

Abstract: The alloy of the invention has improved intermediate temperature properties at temperatures up to about 482.degree. C. The alloy contains (by weight percent) a total of about 6-12% X contained as an intermetallic phase in the form of Al.sub.3 X. X is selected from the group consisting of Nb, Ti and Zr. The alloy also contains about 0.1-4% strengthener selected from the group consisting of Co, Cr, Mn, Mo, Ni, Si, V, Nb when Nb is not selected as X and Zr when Zr is not selected as X. In addition, the alloy contains about 1-4% C and about 0.1-2% O.

公开(公告)号：US09643236B2

公开(公告)日：2017-05-09

申请号：US12616300

申请日：2009-11-11

Applicant: Prakash K. Mirchandani ,  V. Brian Shook ,  Grayson L. Bowman ,  Matthew D. Brown

Inventor： Prakash K. Mirchandani ,  V. Brian Shook ,  Grayson L. Bowman ,  Matthew D. Brown

IPC: B21H3/04 ,  B21H3/06

CPC classification number: B21H3/04 ,  B21H3/06

Abstract: A thread rolling die includes a thread rolling region comprising a working surface including a thread form. The thread rolling region of the thread rolling die comprises a sintered cemented carbide material having a hardness in the range of 78 HRA to 89 HRA. In certain embodiments, the thread rolling die may further include at least one non-cemented carbide piece metallurgically bonded to the thread rolling region in an area of the thread rolling region that does not prevent a workpiece from contacting the working surface, and wherein the non-cemented carbide piece comprises at least one of a metallic region and a metal matrix composite region. Methods of forming a thread rolling die as embodied herein are also disclosed.

公开(公告)号：US09435010B2

公开(公告)日：2016-09-06

申请号：US13591282

申请日：2012-08-22

Applicant: Prakash K. Mirchandani

Inventor： Prakash K. Mirchandani

IPC: B22F7/06 ,  C22C1/05 ,  C22C29/06 ,  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：US08697258B2

公开(公告)日：2014-04-15

申请号：US13182474

申请日：2011-07-14

Applicant: Prakash K. Mirchandani ,  Alfred J. Mosco ,  Eric W. Olsen ,  Steven G. Caldwell

Inventor： Prakash K. Mirchandani ,  Alfred J. Mosco ,  Eric W. Olsen ,  Steven G. Caldwell

IPC: B26D7/08

CPC classification number: C22C29/06 ,  B22F7/062 ,  B22F2005/001 ,  B22F2005/002 ,  B22F2998/00 ,  B23B27/045 ,  B23B27/10 ,  B23B27/141 ,  B23B2222/04 ,  B23B2222/24 ,  B23B2222/28 ,  B23B2222/76 ,  B23B2224/08 ,  B23B2226/12 ,  B23B2226/31 ,  B23B2226/72 ,  B23B2250/12 ,  B23B2250/125 ,  C22C2204/00 ,  E21B10/52 ,  E21B10/567 ,  Y10T83/293 ,  Y10T407/23 ,  Y10T428/12028 ,  Y10T428/24942 ,  C22C29/005 ,  C22C29/067

Abstract: An article includes a working portion including cemented carbide, and a heat sink portion in thermal communication with the working portion. The heat sink portion includes a heat sink material having a thermal conductivity greater than a thermal conductivity of the cemented carbide. Also disclosed are methods of making an article including a working portion comprising cemented carbide, and a heat sink portion in thermal communication with the working portion and including a heat sink material having a thermal conductivity that is greater than a thermal conductivity of the cemented carbide. The heat sink portion conducts heat from the working portion.

Abstract translation: 一种制品包括包括硬质合金的工作部分和与工作部分热连通的散热部分。 散热部分包括具有大于硬质合金的热导率的热导率的散热材料。 还公开了制造包括包括硬质合金的工作部分和与工作部分热连通的散热部分并且包括具有大于硬质合金的热导率的热导率的散热材料的制品的方法。 散热部从工作部导出热量。

公开(公告)号：US20130105231A1

公开(公告)日：2013-05-02

申请号：US13286355

申请日：2011-11-01

Applicant: James J. Oakes ,  Prakash K. Mirchandani ,  Gabriel B. Collins ,  Oladapo O. Eso ,  John L. Johnson

Inventor： James J. Oakes ,  Prakash K. Mirchandani ,  Gabriel B. Collins ,  Oladapo O. Eso ,  John L. Johnson

IPC: E21B10/36

CPC classification number: C22C29/067 ,  B22F2005/001 ,  B22F2998/00 ,  E21B10/5673 ,  C22C29/08

Abstract: An earth boring cutting insert including a cemented carbide comprising metal carbide grains dispersed in a metallic binder including at least one of platinum, palladium, rhenium, rhodium, and ruthenium. Also disclosed is an earth boring bit such as, for example, a rotary-cone earth boring bit or a percussion bit, including at least one earth boring cutting insert comprising a cemented carbide including a metallic binder comprising at least one of platinum, palladium, rhenium, rhodium, and ruthenium

Abstract translation: 一种钻孔切削刀片，其包括硬质合金，其包含分散在包含铂，钯，铼，铑和钌中的至少一种的金属粘合剂中的金属碳化物颗粒。 还公开了一种钻孔钻头，例如旋转圆锥钻孔钻头或冲击钻头，其包括至少一个钻孔切削刀片，其包括包含金属粘结剂的硬质合金，所述金刚石粘合剂包括铂，钯， 铼，铑和钌

公开(公告)号：US08403080B2

公开(公告)日：2013-03-26

申请号：US13309232

申请日：2011-12-01

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: E21B10/46

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

Abstract: Binder compositions for use in forming a bit body of an earth-boring bit includes at least one of cobalt, nickel, and iron, and at least one melting point-reducing constituent selected from at least one of a transition metal carbide up to 60 weight percent, a transition metal boride up to 60 weight percent, and a transition metal silicide up to 60 weight percent, wherein the weight percentages are based on the total weight of the binder. Earth-boring bit bodies include a cemented tungsten carbide material comprising tungsten carbide and a metallic binder, wherein the tungsten carbide comprises greater than 75 volume percent of the cemented tungsten carbide material.

Abstract translation: 用于形成钻头的钻头体的粘合剂组合物包括钴，镍和铁中的至少一种，以及至少一种选自至少一种60重量％的过渡金属碳化物的降低熔点的成分 百分比高达60重量％的过渡金属硼化物和至多60重量％的过渡金属硅化物，其中重量百分数是基于粘合剂的总重量。 钻孔钻头体包括包含碳化钨和金属粘合剂的粘结碳化钨材料，其中碳化钨包括大于75体积％的硬质合金碳化物材料。

公开(公告)号：US20130048701A1

公开(公告)日：2013-02-28

申请号：US13222324

申请日：2011-08-31

Applicant: Prakash K. Mirchandani ,  Morris E. Chandler

Inventor： Prakash K. Mirchandani ,  Morris E. Chandler

IPC: B23K31/02

CPC classification number: C23C26/00 ,  C23C24/10 ,  C23C26/02

Abstract: Methods for forming a wear resistant layer metallurgically bonded to at least a portion of a surface of a metallic substrate may generally comprise positioning hard particles adjacent the surface of the metallic substrate, and infiltrating the hard particles with a metallic binder material to form a wear resistant layer metallurgically bonded to the surface. In certain embodiments of the method, the infiltration temperature may be 50° C. to 100° C. greater than a liquidus temperature of the metallic binder material. The wear resistant layer may be formed on, for example, an exterior surface and/or an interior surface of the metallic substrate. Related wear resistant layers and articles of manufacture are also described.

Abstract translation: 冶金地结合到金属基材的表面的至少一部分上的形成耐磨层的方法通常可以包括邻近金属基材的表面定位硬颗粒，并用金属粘合剂材料渗透硬颗粒以形成耐磨性 层与表面冶金结合。 在该方法的某些实施方案中，渗透温度可以比金属粘合剂材料的液相线温度高50℃至100℃。 耐磨层可以形成在例如金属基材的外表面和/或内表面上。 还描述了相关的耐磨层和制造物品。