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：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.