Coated cemented carbide member

Details Coated cemented carbide member Coated cemented carbide member

1997-06-30

1999-06-22

Turner, Archene

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428212, 428469, 428697, 428698, 428699, 428701, 428702, 428336, 407119, 51295, 51307, 51309, C23C 3000

Patent

active

059141816

ABSTRACT:
A coated cemented carbide member includes a cemented carbide base material containing a binder metal of at least one iron family metal and a hard phase, and a coating layer 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 or a binder phase enriched layer or a low hardness layer is provided on an outermost surface of each insert edge portion of the cemented carbide base material. The coating layer is a single or multiple layer consisting of at least one metal component selected from carbides, nitrides, carbo-nitrides, oxides and borides 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 to be used, for example, as a cutting tool.

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1979, Powder and Powder Metallurgy, vol. 26, No. 6, H. Suzuki et al. "Effects of a Small Amount of Addition-Carbides on High Temperature Transverse-Rupture Strength of WC-Co Cemented Carbide".
Transactions of the Japan Institute of Metals, vol. 45, No. 1, 1981 "The .beta.-Free Layer Formed Near The Surface of Sintered WC-.beta.-Co Alloy Containing Nitrogen", by H. Suzuki et al., pp. 95-99.
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