| 摘要 |
PROBLEM TO BE SOLVED: To provide an endmill made of surface coated super-hard alloy with a hard coating layer excellent in adhesion. SOLUTION: This endmill made of surface coating super-hard alloy is formed by forming a hard covering layer composed of a Ti compound layer formed of one kind or more than one kind among a TiC layer, a TiN layer, a TiCN layer, a TiNO layer, a TiCO layer, and a TiCNO layer, and an Al2 O3 layer in an average layer thickness of 0.5 to 4.5μm by means of chemical vapor deposition and/or physical vapor deposition on a cutting edge part of a WC group super-hard alloy base body comprising the cutting edge part and a shank part. In this case, the Ti compound layer comprising the hard covering layer is formed being gradually reducing its thickness from the cutting edge part to the shank part.
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