Patent ID: 6221479
Filing Date: 2001-04-24
Classification: B22F,C22C,C23C,Y10T

Abstract:
A cemented carbide insert provided with a thin wear resistant coating with excellent properties for machining of steels and stainless steels comprising WC, 5-12.5 wt-% Co and 0-10 wt-% cubic carbides such as TiC, TaC, NbC or mixtures thereof wherein the WC-grains have an average grain size in the range 1.0-3.0 .mu.m the WC grains have a narrow grain size distribution in the range 0.5-4.5 .mu.m the W-content in the binder phase expressed as the ""CW-ratio"" defined asCW-ratio=M.sub.s /wt%Co*0.0161where M.sub.s is the measured saturation magnetization of the sintered cemented carbide insert in kA/m and wt % Co is the weight percentage of Co in the cemented carbide, is 0.86-0.96.