Patent ID: 9228252
Filing Date: 2016-01-05
CPC Classification: B22F,C04B,C22C,Y10T

Claim Text:
1. A hard alloy comprising: a hard phase and a binder phase, the hard phase comprising a main component, a WC phase and a composite hard phase, wherein: the main component contains with respect to total mass of the hard alloy: the binder phase contains 6 to 12 mass % of at least one of Co and Ni as a main component with respect to total mass of the hard alloy; a surface portion having a WC content higher than a WC content of an internal portion of the hard alloy is located at a surface of the hard alloy; and an average size of grains in the WC phase in the surface portion is larger than an average size of grains in the WC phase in the internal portion.