Patent ID: 8993095
Filing Date: 2015-03-31
Classification: B23B,C22C,C23C,Y10T

Abstract:
1. A composite material, comprising: a cemented carbide layer and a cermet layer that are laminated, the cemented carbide layer having an inner surface facing the cermet layer and an outer surface opposite the inner surface, wherein: the cemented carbide layer is disposed on at least one portion of the surface side of the composite material, the outer surface of the cemented carbide layer and a boundary between the cemented carbide layer and the cermet layer having a concave portion, the concave portion having a maximum depth of 50 μm or more and 500 μm or lower, the thickness of a portion having the largest thickness in the lamination direction being defined as h the cermet layer contains WC and W in a proportion of 15 mass % or more and 40 mass % or lower in total, the cemented carbide layer contains W and WC in a higher proportion than the cermet layer, the cemented carbide layer is provided on an outer surface of the cermet layer, and the cemented carbide layer contains WC particles as a main hard phase and the cermet layer contains Ti compounds as a main hard phase.