Title:
超硬合金
Document Type and Number:
Japanese Patent JP3762777
Kind Code:
B1
Abstract:
The present invention provides a cemented carbide with superior strength and toughness by refining the WC in the alloy uniformly and by restricting the growth of coarse WC efficiently. In this cemented carbide, WC with a mean particle diameter of no more than 0.3 microns serves as a hard phase and at least one type of iron group metal element at 5.5 - 15 percent by mass serves as a binder phase. In addition to this hard phase and binder phase, this cemented carbide contains 0.005 - 0.06 percent by mass of Ti, Cr at a weight ratio relative to the binder phase of at least 0.04 and no more than 0.2, with the remaining portion being formed from inevitable impurities. In particular, this cemented carbide does not contain Ta.
Inventors:
Kazuhiro Hirose
Eiji Yamamoto
Eiji Yamamoto
Application Number:
JP2004304944A
Publication Date:
April 05, 2006
Filing Date:
October 19, 2004
Export Citation:
Assignee:
Sumitomo Electric Industries, Ltd.
Sumitomo Electric Hardmetal Corp.
Sumitomo Electric Hardmetal Corp.
International Classes:
C22C29/08; B23B27/14; B23C5/16; C22C1/05
Attorney, Agent or Firm:
Hiroshi Yamano
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