| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a surface-coated cutting tool which exhibits excellent chipping resistance and wear resistance under high speed cutting work such as high speed gear cutting, high speed milling and high speed drilling. <P>SOLUTION: A surface-coated cutting tool has a hard coating layer, consisting of at least an alternative laminate structure of a thin layer A and a thin layer B, which is formed on a surface of tool substrate such as cemented carbide substrate, cermet substrate, and high speed tool steel substrate, in which the thin layer A is formed of a (Al, Cr, Si)N layer which satisfies a compositional formula: [Al<SB>X</SB>Cr<SB>Y</SB>Si<SB>Z</SB>]N (0.2≤X≤0.45, 0.4≤Y≤0.75, 0.01≤Z≤0.2, X+Y+Z=1, in atomic ratio), and the thin layer B is formed of a (Al, Ti, Si)N layer which satisfies [Al<SB>U</SB>Ti<SB>V</SB>Si<SB>W</SB>]N (0.05≤U≤0.75, 0.15≤V≤0.94, 0.01≤W≤0.1, U+V+W=1, in atomic ratio). <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
