公开(公告)号：US20170306456A1

公开(公告)日：2017-10-26

申请号：US15645475

申请日：2017-07-10

Applicant: Kennametal Inc.

Inventor： Pankaj B. TRIVEDI ,  Pankaj Kumar Mehrotra

IPC: C22C29/08 ,  C22C1/05 ,  C22C29/04 ,  C22C29/00 ,  B22F5/00

CPC classification number: C22C29/08 ,  B22F2005/001 ,  C22C1/051 ,  C22C29/005 ,  C22C29/04

Abstract: In one aspect sintered cemented carbide articles are described herein which, in some embodiments, exhibit enhanced resistance to wear and thermal fatigue. Further, sintered cemented carbide articles described herein can tolerate variations in carbon content without formation of undesirable phases, including eta phase and/or free graphite (C-type porosity). Such tolerance can facilitate manufacturing and use of carbide grades where carbon content is not strictly controlled. A sintered cemented carbide body described herein comprises a hard particle phase including tungsten carbide and a metallic binder phase comprising at least one of cobalt, nickel and iron and one or more alloying additives, wherein the sintered cemented carbide has a magnetic saturation (MS) ranging from 0% to 73% and no eta phase.

公开(公告)号：US09725794B2

公开(公告)日：2017-08-08

申请号：US14573893

申请日：2014-12-17

Applicant: Kennametal Inc.

Inventor： Pankaj B. Trivedi ,  Pankaj Kumar Mehrotra

IPC: C22C1/05 ,  C22C29/08 ,  C22C29/04 ,  C22C29/00 ,  B22F5/00

CPC classification number: C22C29/08 ,  B22F2005/001 ,  C22C1/051 ,  C22C29/005 ,  C22C29/04

Abstract: In one aspect sintered cemented carbide articles are described herein which, in some embodiments, exhibit enhanced resistance to wear and thermal fatigue. Further, sintered cemented carbide articles described herein can tolerate variations in carbon content without formation of undesirable phases, including eta phase and/or free graphite (C-type porosity). Such tolerance can facilitate manufacturing and use of carbide grades where carbon content is not strictly controlled. A sintered cemented carbide body described herein comprises a hard particle phase including tungsten carbide and a metallic binder phase comprising at least one of cobalt, nickel and iron and one or more alloying additives, wherein the sintered cemented carbide has a magnetic saturation (MS) ranging from 0% to 73% and no eta phase.

公开(公告)号：US09656873B2

公开(公告)日：2017-05-23

申请号：US14549124

申请日：2014-11-20

Applicant: Kennametal Inc.

Inventor： Pankaj Kumar Mehrotra ,  Mark S. Greenfield

IPC: C01B31/34

CPC classification number: C01B31/34 ,  C01B32/949

Abstract: In one aspect, methods of purifying WC compositions are described herein. A method of purifying a WC composition comprises contacting the WC composition with an electrolyte solution comprising a cationic metal oxidant and oxidizing one or more metal impurities of the WC composition with the cationic metal oxidant to solubilize the one or more metal impurities in the electrolyte solution.

公开(公告)号：US10415119B2

公开(公告)日：2019-09-17

申请号：US15645475

申请日：2017-07-10

Applicant: Kennametal Inc.

Inventor： Pankaj B. Trivedi ,  Pankaj Kumar Mehrotra

IPC: B22F5/00 ,  C22C29/08 ,  C22C29/04 ,  C22C29/00 ,  C22C1/05

Abstract: In one aspect sintered cemented carbide articles are described herein which, in some embodiments, exhibit enhanced resistance to wear and thermal fatigue. Further, sintered cemented carbide articles described herein can tolerate variations in carbon content without formation of undesirable phases, including eta phase and/or free graphite (C-type porosity). Such tolerance can facilitate manufacturing and use of carbide grades where carbon content is not strictly controlled. A sintered cemented carbide body described herein comprises a hard particle phase including tungsten carbide and a metallic binder phase comprising at least one of cobalt, nickel and iron and one or more alloying additives, wherein the sintered cemented carbide has a magnetic saturation (MS) ranging from 0% to 73% and no eta phase.

公开(公告)号：US20160177426A1

公开(公告)日：2016-06-23

申请号：US14573893

申请日：2014-12-17

Applicant: Kennametal Inc.

Inventor： Pankaj B. TRIVEDI ,  Pankaj Kumar Mehrotra

IPC: C22C29/08 ,  C22C1/05 ,  C22C29/00 ,  B22F3/12 ,  C22C29/04

CPC classification number: C22C29/08 ,  B22F2005/001 ,  C22C1/051 ,  C22C29/005 ,  C22C29/04

Abstract: In one aspect sintered cemented carbide articles are described herein which, in some embodiments, exhibit enhanced resistance to wear and thermal fatigue. Further, sintered cemented carbide articles described herein can tolerate variations in carbon content without formation of undesirable phases, including eta phase and/or free graphite (C-type porosity).Such tolerance can facilitate manufacturing and use of carbide grades where carbon content is not strictly controlled. A sintered cemented carbide body described herein comprises a hard particle phase including tungsten carbide and a metallic binder phase comprising at least one of cobalt, nickel and iron and one or more alloying additives, wherein the sintered cemented carbide has a magnetic saturation (MS) ranging from 0% to 73% and no eta phase.

Abstract translation: 在一个方面中，本文描述了烧结硬质合金制品，其在一些实施方案中表现出增强的耐磨性和热疲劳性。 此外，本文所述的烧结硬质合金制品可耐受碳含量的变化，而不形成不希望的相，包括η相和/或游离石墨（C型孔隙）。 这种公差可以促进碳含量不严格控制的碳化物等级的制造和使用。 本文描述的烧结硬质合金体包括包含碳化钨的硬质颗粒相和包含钴，镍和铁中的至少一种的金属粘结相和一种或多种合金添加剂，其中烧结硬质合金具有范围的磁饱和（MS） 0％至73％，无eta相。