| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a surface coating cutting tool which exhibits the excellent abrasion resistance and oxidation resistance when carbon steel or hard metal steel is used for dry, high notch, and high feed cutting as well. <P>SOLUTION: In the surface coating cutting tool having a full hard coating layer on a tool base, the full hard coating layer is composed of: a lower layer which has composition of (Ti<SB POS="POST">1</SB>-<SB POS="POST">x</SB>-<SB POS="POST">y</SB>Al<SB POS="POST">x</SB>Si<SB POS="POST">y</SB>)N (wherein X=0.40-0.70 and Y=0.02-0.15), has an average layer thickness of 0.8-5.0 μm, and is composed of a composite nitride of Ti, Al, and Si; and an upper layer which has composition of (Ti<SB POS="POST">1</SB>-<SB POS="POST">x</SB>-<SB POS="POST">y</SB>Al<SB POS="POST">x</SB>Si<SB POS="POST">y</SB>)(N<SB POS="POST">1</SB>-<SB POS="POST">z</SB>O<SB POS="POST">z</SB>) (wherein X=0.40-0.70, Y=0.02-0.15, and Z=0.02-0.15), has an average layer thickness of 0.1-1.0 μm, and includes oxygen, and when the upper layer is measured from a tool surface by use of X-ray diffraction, a (101) peak of a β-Si<SB POS="POST">3</SB>N<SB POS="POST">4</SB>phase in which a half-power band width exists in a range of 3-5 degrees exists. <P>COPYRIGHT: (C)2013,JPO&INPIT |
