| 摘要 |
PROBLEM TO BE SOLVED: To provide a hard film coated roughing end mill capable of attaining high speed and long life of rough cutting by a roughing end mill. SOLUTION: In this hard film coated high speed steel roughing end mill, at least one or more layers of a hard film selected among one or more kinds of components selected among Si, elements in 4a, 5a and 6a groups of a periodic table and Al and one or more kinds of components selected among C, N, O and B are coated. At least a layer of the hard film is the hard film in which bond energy of Si and N is recognized by an X-ray photoelectron spectroscopic analysis. V and Co included in a base material of high speed steel is in the range of 10≤(V+Co)≤20 in wt.%. COPYRIGHT: (C)2004,JPO
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