Patent ID: 6235382
Filing Date: 2001-05-22
Classification: B22F,B23B,C22C,C23C,Y10T

Abstract:
A cermet tool comprising a cermet body including,a binder metallic phase forming component of Ni, or Ni and Co, anda hard phase including a hard phase metallic element component comprising, Ti as its main part, and one or more of an additional metallic element component M selected from the group consisting of V, Cr, Zr, Nb, Mo, Hf, Ta and W, and said hard phase comprising a carbonitride of said hard phase metallic element component,a surface coating layer formed on a surface outermost part of said cermet body, said surface coating layer comprising a hard phase and a binder metallic phase component of Ni or Ni and Co and including the same elements as in said hard phase of said cermet body and in which a weight content of said binder metallic phase forming component in said surface coating layer is smaller than an average weight content of said binder metallic phase forming component throughout said cermet body; and a weight content of WB1 of said binder metallic phase forming component in said surface coating layer of said cermet and a weight content of WB2 of said binder metallic phase forming component of a residual part of said cermet body other than said surface coating layer satisfying0.1.ltoreq.WB1/WB2.ltoreq.0.7.