| 摘要 |
PROBLEM TO BE SOLVED: To provide an amorphous carbon film coated member which can suppress cracking by virtue of stress concentration accompanying the thickening of an amorphous carbon film, and is improved in peeling resistance and in abrasion resistance of the amorphous carbon film. SOLUTION: The amorphous carbon film coated member consists of a substrate formed of a WC-based cemented carbide, and the amorphous carbon film applied to the substrate. A mean particle size of WC of the substrate is set to 0.8μm or less, and a mean particle size in a binding phase of the substrate is set to 200μm or less. When a saturation magnetization value of the substrate is represented by R and a value of 202×Co%/100 is represented by S, a saturation magnetization ratio R/S is set in the relationship of 0.65≤R/S≤0.9. COPYRIGHT: (C)2006,JPO&NCIPI
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