Patent ID: 6207262
Filing Date: 2001-03-27
Classification: C23C,Y10T

Abstract:
A coated cemented carbide endmill, comprising:(a) a substrate, comprising tungsten carbide grains having an average grain size of 0.1-1.5 .mu.m,(b) a first layer having a thickness of 0.1-2 .mu.m, on said substrate, in which a complex carbide of cobalt and tungsten is distributed, and(c) a coating having a thickness of 0.5-4.5 .mu.m, on said first layer,wherein said coating comprises at least one layer, and said at least one layer is selected from the group consisting of layers of TiC, TiN, TiCN, TiCO, TiNO, TiCNO and Al.sub.2 O.sub.3.