Surface-coated cutting tool and method of manufacturing the same
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United States of America Patent
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Dec 26, 2017
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app pub date -
Oct 9, 2015
filing date -
Oct 9, 2015
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Abstract
A surface-coated cutting tool includes a base material and a coating formed on the base material. The coating includes an α-Al2O3 layer containing a plurality of α-Al2O3 crystal grains. The α-Al2O3 layer includes: a first region made up of an edge ridgeline, a region A of a rake face, and a region B of a flank face; a second region which is a region of the rake face except for the region A and covered with the coating; and a third region which is a region of the flank face except for the region B. The α-Al2O3 layer satisfies a relation b−a>0.5, where a is an average value of a TC(006) in the first region in texture coefficient TC(hkl) and b is an average value of the TC(006) in the second region or the third region in texture coefficient TC(hkl).
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