HARD FILM-COATED CUTTING TOOL
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United States of America
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Issued Date -
Apr 3, 2025
app pub date -
Dec 15, 2022
filing date -
Dec 15, 2022
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Abstract
A hard film-coated cutting tool comprises: a hard base material and a hard film formed on the hard base material, wherein: assuming that a colorimetric diffusion reflectance value is LSCER and a total reflectance value is LSCIR, the relationship of 0.65≤LSCER/LSCIR≤0.85 is satisfied, and when surface roughness is measured on the rake surface of the hard film within the range of 100 μm from the edge, an arithmetic average height SaR is within the range of 0.2 μm≤SaR≤0.5 μm; and assuming that, at a flank surface of the hard film, a colorimetric diffusion reflectance value is LSCEF and a total reflectance value is LSCIF, the relationship of LSCEF/LSCIF≥0.9 is satisfied, and when surface roughness is measured on the flank surface of the hard film within the range of 100 μm from the edge, an arithmetic average height SaF is within the range of 0.15 μm≤SaF≤0.4 μm.
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