公开(公告)号：EP3309268A4

公开(公告)日：2018-07-04

申请号：EP15895692

申请日：2015-12-15

Applicant: SUMITOMO ELECTRIC INDUSTRIES

Inventor： YAMAMOTO TSUYOSHI ,  MATSUKAWA MICHIKO ,  KIDO YASUKI ,  TSUDA KEIICHI

IPC: C22C29/08 ,  B23B27/14 ,  B23B51/00 ,  B23C5/16 ,  C22C1/05 ,  C22C29/02 ,  C22C29/06 ,  C22C29/16

CPC classification number: C22C29/08 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/053 ,  C22C29/02 ,  C22C29/067 ,  C22C29/16 ,  B22F1/0011 ,  C22C1/05 ,  B22F3/1017 ,  B22F3/1035 ,  B22F3/02 ,  B22F2005/001 ,  C23C16/00 ,  B22F3/04 ,  C23C14/00 ,  B22F3/225 ,  B22F2201/10 ,  B22F2201/01 ,  B22F2201/20 ,  B22F3/1028

Abstract: Provided are a cemented carbide having excellent plastic deformation resistance and a cutting tool in which the cemented carbide is used as a substrate. A cemented carbide includes a hard phase containing tungsten carbide particles and a binder phase containing, as a main component, an iron-group element, wherein the formula B/A ‰¤ 0.05 is satisfied, where A represents the number of the tungsten carbide particles, and B represents the number of tungsten carbide particles whose number of contact points with other tungsten carbide particles is 1 or less. Preferably, the iron-group element includes cobalt, and the cobalt content in the cemented carbide is 8% by mass or more. Preferably, the tungsten carbide particles have an average particle diameter of 3 µm or more.