| 摘要 |
PROBLEM TO BE SOLVED: To provide cemented carbide in which heat resistance and tenacity are increased by the addition of a metallic element to cemented carbide and which can sufficiently meet the recent demand for higher speed and higher efficiency in machining. SOLUTION: Ru is incorporated as an additive into the cemented carbide, and further, on a line analysis chart obtained by making a beam of≤1.5μm beam diameter scan across the mirror-polished surface of the cemented carbide using an X-ray microanalyzer, irregularities showing fluctuation in the concentration of Co in the cemented carbide and irregularities showing fluctuation in the concentration of the Ru conform with each other in≥90% positions. Further, a tool in which a material prepared by using the cemented carbide as a base material and a part of the whole of the surface of the cemented carbide is coated with a hard material is used at least in part is also provided. COPYRIGHT: (C)2004,JPO
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