公开(公告)号：US20210105888A1

公开(公告)日：2021-04-08

申请号：US16593323

申请日：2019-10-04

Applicant: Kennametal Inc.

Inventor： Robert J. VASINKO ,  Qingjun ZHENG ,  Corinne CHARLTON ,  Joern KOHLSCHEEN

IPC: H05H1/34

Abstract: In one aspect, nozzles for arc torches are described herein comprising refractory coatings for increasing nozzle operational lifetimes via resistance to weld splatter and the associated accumulation of molten metal deposits. In one aspect, a nozzle for an arc torch comprises a first body including a central bore and an exterior surface. A coating is adhered to the exterior surface by thermal spray, physical vapor deposition (PVD), or chemical vapor deposition (CVD), the coating comprising a refractory layer including one or more metallic elements selected from the group consisting of aluminum, silicon and metallic elements of Groups IIIB-VIIIB of the Periodic Table and one or more non-metallic elements selected from Groups IIIA, IVA, VA, and VIA of the Periodic Table.

公开(公告)号：US20170233852A1

公开(公告)日：2017-08-17

申请号：US15425781

申请日：2017-02-06

Applicant: Kennametal Inc.

Inventor： Matthew YAO ,  Abdelhakim BELHADJHAMIDA ,  David A. LEE ,  Qingjun ZHENG

IPC: C22C19/07 ,  C23C4/06 ,  C23C4/129 ,  B22F1/00

CPC classification number: C22C19/07 ,  B22F1/0003 ,  B22F2301/15 ,  C23C4/06 ,  C23C4/129 ,  Y10T428/12063

Abstract: Cobalt-based alloy compositions are described herein having properties compatible with thermal spray and sintering techniques. Such alloy compositions can provide claddings to a variety of metallic substrates having complex geometries, wherein the claddings exhibit desirable density, hardness, wear resistance and corrosion resistance. Briefly, an alloy composition described herein comprises 15-25 wt. % chromium, 15-20 wt. % molybdenum, 0-15 wt. % tungsten, 10-20 wt. % nickel, 2.5-3.5 wt. % boron, 2.5-4.5 wt. % silicon, 1-2 wt. % carbon and the balance cobalt, wherein a ratio of boron to silicon (B/Si) in the alloy composition ranges from 0.5 to 1.0.

公开(公告)号：US20210031492A1

公开(公告)日：2021-02-04

申请号：US16931927

申请日：2020-07-17

Applicant: Kennametal Inc.

Inventor： Martin G. PEREZ ,  Michael J. MEYER ,  Qingjun ZHENG

IPC: B32B15/18 ,  C22C29/08 ,  B32B18/00 ,  B32B7/05

Abstract: Wear resistant articles are described herein which, in some embodiments, mitigate CTE differences between wear resistant components and metallic substrates. In one aspect, an article comprises a layer of sintered cemented carbide bonded to a layer of iron-based alloy via a metal-matrix composite bonding layer, wherein coefficients of thermal expansion (CTE) of the sintered cemented carbide layer, metal matrix composite bonding layer, and iron-based alloy layer satisfy the relation: x = (  C   T   E   WC - C   T   E   M   M   C  ) (  C   T   E   M   M   C - C   T   E   Fe  ) wherein 0.5≤x≤2 and CTE WC, CTE MMC and CTE Fe are the CTE values for the sintered cemented carbide, metal matrix composite, and iron-based alloy in 1/K respectively at 900° C. to 1100° C.

公开(公告)号：US20160193660A1

公开(公告)日：2016-07-07

申请号：US15073014

申请日：2016-03-17

Applicant: Kennametal Inc.

Inventor： Qingjun ZHENG ,  Yixiong Liu ,  James A. Faust ,  Danie J. De Wet ,  Sudharsan Subbaiyan ,  Piyamanee Komolwit ,  Mark J. Rowe

IPC: B22F7/04 ,  C22C19/05 ,  C22C19/00 ,  C22C19/03 ,  B22F3/10 ,  B22F7/00

CPC classification number: B22F7/04 ,  B22F3/10 ,  B22F7/008 ,  B22F7/062 ,  B22F7/08 ,  B32B15/011 ,  B32B15/015 ,  C22C1/0433 ,  C22C19/002 ,  C22C19/005 ,  C22C19/03 ,  C22C19/055 ,  C22C19/056 ,  C22C19/057 ,  C22C19/058 ,  C22C38/04 ,  C22C38/22 ,  C22C38/36 ,  C22C38/38

Abstract: In one aspect, methods of making cladded articles are described herein. A method of making a cladded article, in some embodiments, comprises disposing over a surface of a metallic substrate a sheet comprising organic binder and powder metal or powder alloy having a solidus temperature at least 100° C. less than the metallic substrate and heating the powder metal or powder alloy to provide a sintered metal or sintered alloy cladding metallurgically bonded to the metallic substrate.

Abstract translation: 在一个方面，本文描述了制作包覆制品的方法。 在一些实施方案中，制造包覆制品的方法包括在金属基材的表面上设置包含有机粘合剂和粉末金属或粉末合金的片材，该片材具有比金属基底小至少100℃的固相线温度，并加热 粉末金属或粉末合金，以提供冶金结合到金属基底上的烧结金属或烧结合金包层。

公开(公告)号：US20200338672A1

公开(公告)日：2020-10-29

申请号：US16396123

申请日：2019-04-26

Applicant: Kennametal Inc.

Inventor： Qingjun ZHENG ,  Robert J. Vasinko

IPC: B23K35/30

Abstract: Welding rods and associated cladded articles are described herein. Briefly, a welding rod comprises a hard particle component dispersed in a nickel-based alloy matrix or cobalt-based alloy matrix, the hard particle component comprising tungsten carbide particles having an average size of less than 45 μm, and the nickel-based alloy matrix or the cobalt-based alloy matrix comprising at least one metal carbide forming element.

公开(公告)号：US20180304420A1

公开(公告)日：2018-10-25

申请号：US15492413

申请日：2017-04-20

Applicant: Kennametal Inc.

Inventor： Qingjun ZHENG ,  Michael MEYER ,  Martin G. PEREZ ,  Abdelhakim BELHADJHAMIDA

IPC: B23P6/04 ,  C22C19/05 ,  B23K35/30 ,  B23K35/02 ,  B23K1/00

CPC classification number: B23P6/045 ,  B23K1/0018 ,  B23K35/0238 ,  B23K35/0244 ,  B23K35/304 ,  B23K2101/001 ,  B23K2103/08 ,  C22C19/056 ,  C22C19/057

Abstract: Methods of superalloy article repair are provided. In some embodiments, a method for repairing a nickel-based superalloy article comprises providing a layered assembly over a damaged region of the nickel-based superalloy article, the layered assembly comprising a nickel-based superalloy preform, an infiltration alloy preform and a melting point depressant component. The layered assembly is heated to form a nickel-based filler alloy metallurgically bonded to the damaged region, wherein primary carbide and secondary carbide phases are present in the nickel-based filler alloy in a combined amount of 0.5 to 10 vol. %.

公开(公告)号：US20170341148A1

公开(公告)日：2017-11-30

申请号：US15165877

申请日：2016-05-26

Applicant: Kennametal Inc.

Inventor： James A. FAUST ,  Daniel Bourlotos ,  Qingjun ZHENG ,  Michael MEYER

IPC: B22F7/00 ,  B22F7/04 ,  B32B15/01 ,  E21B43/26 ,  E21B34/06 ,  B22F1/00 ,  B22F7/08

CPC classification number: B22F7/008 ,  B22F1/0014 ,  B22F1/0074 ,  B22F5/10 ,  B22F7/04 ,  B22F7/08 ,  B22F2007/045 ,  B22F2007/066 ,  B22F2207/01 ,  B22F2301/15 ,  B22F2302/10 ,  B22F2302/45 ,  B22F2304/10 ,  B32B15/01 ,  E21B34/06 ,  E21B43/26

Abstract: In one aspect, composite articles are described herein employing cobalt-based alloy claddings exhibiting high hardness and wear resistance while maintaining desirable integrity and adhesion to surfaces of metallic substrates. A composite article, in some embodiments, comprises a metallic substrate and a composite cladding metallurgically bonded to one or more surfaces of the metallic substrate, the composite cladding including cobalt-based alloy having a chromium gradient, wherein chromium content increases in a direction from the composite cladding surface to an interface of the composite cladding with the metallic substrate.

公开(公告)号：US20170129015A1

公开(公告)日：2017-05-11

申请号：US15413964

申请日：2017-01-24

Applicant: Kennametal Inc.

Inventor： Qingjun ZHENG ,  Yixiong LIU ,  James A. FAUST ,  Mark J. ROWE ,  Danie J. DE WET ,  Sudharsan SUBBAIYAN ,  Michael J. MEYER

IPC: B22F7/00 ,  C22C38/38 ,  C22C38/36 ,  C22C38/22 ,  B22D23/06 ,  C22C9/10 ,  C22C9/06 ,  C22C9/01 ,  C22C19/07 ,  C22C19/05 ,  B22F3/10 ,  C22C14/00

CPC classification number: B22F7/008 ,  B22D23/06 ,  B22F3/10 ,  B22F5/106 ,  B22F2005/103 ,  B22F2007/066 ,  B22F2301/10 ,  B22F2301/15 ,  B22F2301/205 ,  B22F2301/35 ,  B22F2302/10 ,  B22F2302/253 ,  B22F2302/45 ,  B23K35/0222 ,  B23K35/0244 ,  B23K35/3033 ,  B23K35/304 ,  C22C1/1015 ,  C22C9/01 ,  C22C9/06 ,  C22C9/10 ,  C22C14/00 ,  C22C19/058 ,  C22C19/07 ,  C22C29/02 ,  C22C32/0047 ,  C22C38/22 ,  C22C38/36 ,  C22C38/38

Abstract: In one aspect, methods of making freestanding metal matrix composite articles and alloy articles are described. A method of making a freestanding composite article described herein comprises disposing over a surface of the temporary substrate a layered assembly comprising a layer of infiltration metal or alloy and a hard particle layer formed of a flexible sheet comprising organic binder and the hard particles. The layered assembly is heated to infiltrate the hard particle layer with metal or alloy providing a metal matrix composite, and the metal matrix composite is separated from the temporary substrate. Further, a method of making a freestanding alloy article described herein comprises disposing over the surface of a temporary substrate a flexible sheet comprising organic binder and powder alloy and heating the sheet to provide a sintered alloy article. The sintered alloy article is then separated from the temporary substrate.