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。

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：US20190047051A1

公开(公告)日：2019-02-14

申请号：US15675078

申请日：2017-08-11

Applicant: Kennametal Inc.

Inventor： Pankaj K. MEHROTRA ,  Pankaj B. TRIVEDI ,  Kent P. MIZGALSKI

IPC: B22F3/16 ,  C22C29/08 ,  B22F9/04 ,  C04B35/56

Abstract: In one aspect, grade powder compositions are described herein comprising electrochemically processed sintered carbide scrap. In some embodiments, a grade powder composition comprises a reclaimed powder component in an amount of at least 75 weight percent of the grade powder composition, wherein the reclaimed carbide component comprises electrochemically processed sintered carbide scrap.

公开(公告)号：US20170001916A1

公开(公告)日：2017-01-05

申请号：US15267804

申请日：2016-09-16

Applicant: KENNAMETAL INC.

Inventor： Pankaj B. TRIVEDI ,  Pankaj K. Mehrotra ,  Neal S. Myers

IPC: C04B35/71 ,  C04B35/626 ,  C04B35/634 ,  C08L57/00 ,  B02C17/18 ,  C08K3/14 ,  B22F1/00 ,  B22F9/04 ,  B22F3/16 ,  B22F7/00 ,  C04B35/56 ,  C08K3/08

CPC classification number: C04B35/71 ,  B02C17/18 ,  B02C17/186 ,  B02C23/18 ,  B22F1/0003 ,  B22F3/16 ,  B22F3/22 ,  B22F7/008 ,  B22F9/04 ,  B22F2009/043 ,  B22F2301/15 ,  B22F2302/10 ,  B22F2302/45 ,  B22F2998/10 ,  C04B35/5626 ,  C04B35/6263 ,  C04B35/6264 ,  C04B35/63488 ,  C04B2235/3847 ,  C04B2235/405 ,  C04B2235/94 ,  C08K3/08 ,  C08K3/14 ,  C08K5/06 ,  C08K5/17 ,  C08K2003/0843 ,  C08L57/00 ,  C08L2205/03 ,  C09D5/033 ,  C09D191/06 ,  C22C29/02 ,  C22C29/08 ,  C22C29/16 ,  B22F1/0059

Abstract: An aqueous slurry that is useful upon being spray dried for the formation of a powder of hard material. The aqueous slurry includes starting powder components of the hard material. The slurry further includes an oxidation inhibitor, a surfactant in an amount between about 0.05 weight percent and about 0.30 weight percent of the weight of the starting powder components of the hard material, a binder, a defoamer and water in an between about 15 weight percent and about 30 weight percent of the weight of the weight of the starting powder components of the hard material. The aqueous slurry has a percent solids value that is between about 70 percent and about 85 percent.

Abstract translation: 用于喷雾干燥以形成硬质材料粉末的水性浆料。 含水浆料包括硬质材料的起始粉末组分。 该浆料还包括氧化抑制剂，表面活性剂，其量为硬质材料的起始粉末组分，粘合剂，消泡剂和水的约0.05重量％至约0.30重量％，其含量为约15重量％ 和约30重量％的硬质材料的起始粉末组分的重量的重量。 含水浆料的固含量百分比在约70％至约85％之间。