SURFACE-COVERED SUPERALLOY CUTTING TOOL WHOSE HARD COVERING LAYER EXHIBITS GOOD CHIPPING RESISTANCE AND WEAR RESISTANCE IN HIGH-SPEED HEAVY CUTTING CONDITION

摘要

PROBLEM TO BE SOLVED: To provide a surface-covered superalloy cutting tool whose hard covering layer exhibits good chipping resistance and wear resistance in a high-speed heavy cutting condition.;SOLUTION: In this surface-covered superalloy cutting tool having a hard covering layer made of a carbonated compound layer of Al and Ti deposited on a surface of a super hard substrate with an average layer thickness of 2 to 20 μm, the hard covering layer is formed in a manner that the maximum containing point of Al and oxygen and the maximum containing point of Ti and carbon are alternately present with a predetermined interval repeatedly along the layer thickness direction and that the layer has structure of component concentration distribution where the amount of AL and Ti and the amount of oxygen and carbon change successively between both of the containing points and a gap between adjacent containing points is 0.01 to 0.2 μm.;COPYRIGHT: (C)2004,JPO