| 摘要 |
PROBLEM TO BE SOLVED: To provide cemented carbide by which, even in the case that, after being joined to a base material (basis material) by welding or brazing, the resultant joined object (joined material) is subjected to holding at a high temperature, cracking and deterioration in wear resistance after the high temperature holding can be prevented. SOLUTION: (1) The cemented carbide uses Co and/or Ni as a binding material, and in which WC is dispersed in the binding material, and further, the particle size of the WC is 1.5 to 4μm and the total content of the Co and/or Ni is 25 to 45 mass% and 6 to 25 mass% W is contained in the binding material. (2) The cemented carbide is produced by substituting not more than 15 vol.% of the WC with fine powder of 0.3 to 3μm particle size composed of one or more kinds among the carbides, nitrides and carbonitrides of at least one element selected from Ti, Ta, Nb, V and Cr. (3) The cemented carbide is used by being joined to the surface of the basis material of a sliding member. COPYRIGHT: (C)2007,JPO&INPIT
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