| 摘要 |
PROBLEM TO BE SOLVED: To provide a coated broach for exhibiting the superior tool service life by improving abrasion resistance by enhancing hardness being a defect of a CR type coating film, and further improving agglutination resistance and press-fitting resistance by providing superior lubricity on a coating film surface. SOLUTION: The coating is a hard coating film coated by an arc discharge type ion plating method. The hard coating film is composed of (AlxCr1-x-ySiy)(N1-α-β-γBαCβOγ), where x, y,α,βandγrespectively indicate the atomic ratio, and satisfy 0.45<x<0.75, 0≤y<0.2, 0≤α<0.12, 0≤β<0.2, and 0.01≤γ≤0.25, and is characterized in that a value of diffraction intensity I(200)/I(111) in X-ray diffraction is composed of 0.5 to 6; binding energy of at least Cr, Al and/or Si is provided in a range of 525eV to 535eV in an X-ray photoelectron spectral analysis; a base body of the broach is composed of high speed steel; the sum of V and Co is 10≤(V+Co)≤20 in wt.%; and Cr is 3.8≤Cr≤4.5 in wt.%. COPYRIGHT: (C)2004,JPO&NCIPI
|
