Patent ID: 9233418
Filing Date: 2016-01-12
CPC Classification: B22D,C22C

Claim Text:
1. A compound body comprising: cemented carbide including a cobalt binder phase, wherein the cobalt binder phase has a magnetic cobalt content of 0.9 to 1.0 of the nominal cobalt content; a low carbon steel surrounding the cemented carbide, wherein the steel has a carbon content corresponding to a carbon equivalent Ceq=wt-% C+0.3(wt-% Si+wt-% P) of less than 0.9 wt-% but more than 0.5 wt-%, and a transition zone between the cemented carbide and steel, wherein the transition zone includes an eta-phase zone with a thickness between 50 and 200 μm, wherein, in the cemented carbide adjacent to the eta-phase zone, there is an iron containing transition zone and wherein, in the steel adjacent to the eta-phase zone, there is a zone with enriched carbon content.