Coated cutting tool and production method therefor
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United States of America Patent
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Nov 29, 2022
Grant Date -
Jun 3, 2021
app pub date -
Mar 27, 2019
filing date -
May 30, 2018
priority date (Note) -
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status (Latency Note)
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Abstract
Provided is a coated cutting tool having a base material side single layer portion and a laminated portion provided as a hard coating in order from a base material side. The base material side single layer portion is formed of a nitride-based hard coating in which a proportion of Al is highest among metal (including metalloid) elements, a sum of Al and Cr in a content ratio (atomic ratio) is 0.9 or more, and at least B is contained. In the laminated portion, a nitride-based a layer in which a proportion of Ti is highest among metal (including metalloid) elements and at least B is contained, and a nitride-based b layer in which a proportion of Al is highest among metal (including metalloid) elements and at least Cr and B are contained are alternately laminated.
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