Beschichtete Hartmetallkörper und Verfahren zu ihrer Herstellung

摘要

A coated cemented carbide member comprises a cemented carbide base material containing a binder metal of at least one iron family metal and a hard phase of a component selected from carbides etc. of metals belonging to the groups IVB, VB and VIB of the periodic table and a coating layer (2) provided on the surface of the cemented carbide base material. The hard phase contains at least one metal component selected from carbides, nitrides, carbo-nitrides and carbonic nitrides of Zr and/or Hf and WC. A layer consisting of only WC and an iron family metal (3) is provided on an outermost surface of each insert edge portion (1) of the cemented carbide base material. The coating layer (2) is a single or multiple layer consisting of at least one metal component selected from carbides etc. of metals belonging to the groups IVB, VB and VIB of the periodic table. Due to this structure, it is possible to improve chipping resistance with no deterioration of wear resistance in the coated cemented carbide member for serving as a cutting tool.