CEMENTED CARBIDE COMPOSITE MATERIAL, METHOD FOR PRODUCING SAME, AND CEMENTED CARBIDE TOOL

WIPO Patent Application WO/2019/069701

A1

Provided is a cemented carbide composite material of a non-cemented carbide and a cemented carbide, which has a high-temperature strength that is higher than ever before, and which is able to suppress the occurrence of cracking or separation. This cemented carbide composite material has: a cemented carbide part that is composed of a WC-Co-based cemented carbide; and a substrate part that is composed of a metal which contains Ni or Co in a total amount of 50% by mass or more. This cemented carbide composite material has an intermediate layer, which contains the constituents of the cemented carbide part and the constituents of the substrate part, between the cemented carbide part and the substrate part. This intermediate layer contains a portion that has a gamma phase fraction of 80% or more and a Vickers hardness of less than 700 HV.

SHIRATORI HIROSHI (JP)
KAWANAKA HIROTSUGU (JP)
KOSEKI SHUHO (JP)
FURUYA TADASHI (JP)

PCT/JP2018/034850

April 11, 2019

September 20, 2018

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HITACHI METALS LTD (JP)

B22F7/08; B22F3/16; B22F7/00; B33Y10/00; B33Y80/00; C22C19/05; C22C19/07; C22C29/08; C22F1/10; C22F1/00

WO2012128708A1

2012-09-27

JP2011523681A	2011-08-18
JP2008169419A	2008-07-24
JP2006175456A	2006-07-06
JP2013107187A	2013-06-06
JP2016196702A	2016-11-24
JP2004211162A	2004-07-29
JP2016108668A	2016-06-20
US20160375493A1	2016-12-29
JP2017501890A	2017-01-19
JPH01221680A	1989-09-05

HIRAKI & ASSOCIATES (JP)

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