SURFACE-COATED CUTTING TOOL

Abstract: the surface coated cutting tool has the same multiple cutting edges. the coating layer of the flank face has a composition represented by (alti) (cn) (the average content xof x is 0.60 to 0.95 and the average content yof y's is 0.0000 to 0.0050); the crystal grains in each flank face have an average value i(200) of 200 diffraction intensities and a standard deviation �, where the �/i(200) is 0.00 to 0.20; the average value land standard deviation �of the thicknesses lm's of the coating layer on a line 100 �m away from the ridge of each cutting edge in the direction of the flank face is within a �/lof 0.00 to 0.20; and the coating layer on each flank face has a region containing variable amounts of al and ti, and the difference between the maximum xand the minimum xis 0.02 to 0.40.

Inventor(s): Kosuke YANAGISAWA, Hisashi HOMMA

CPC Classification: B23B27/14 (TURNING; BORING (arrangements for copying or controlling ))

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