CEMENTED CARBIDE COMPOSITE MATERIAL, METHOD FOR PRODUCING SAME, AND CEMENTED CARBIDE TOOL

摘要

Provided is a cemented carbide composite material including cemented carbide and non-cemented carbide having better high-temperature strength than conventional materials and capable of suppressing breakage and peeling of the composite material. A cemented carbide composite material includes: a cemented carbide part including WC-Co-based cemented carbide; a substrate part including metal that contains at least one of Ni and Co that accounts for 50 mass% or more in total. This cemented carbide composite material has an intermediate layer between the cemented carbide composite material and the substrate part, the intermediate layer containing components of the cemented carbide part and components of the substrate part. The intermediate layer includes a part having a gamma phase fraction of 80% or more and having Vickers hardness less than 700 HV.