NON-PERFORATED SURFACE COATED CERMET-MADE CUTTING THROW-AWAY CHIP HAVING HARD COATED LAYER EXHIBITING EXCELLENT CHIPPING RESISTANCE IN HIGH-SPEED CUTTING

摘要

PROBLEM TO BE SOLVED: To provide a non-perforated coated cutting chip exhibiting chipping resistance in high speed cutting.;SOLUTION: In this non-perforated coated cutting chip, a hard coated layer including a lower layer composed of a Ti-compound layer and an upper layer composed of -type Al₂O₃ layer is vapor-deposited on the surface of a chip base, and the cutting chip is fitted to a tool body by being clamped and tightened by a clamp piece. In a state that an abrasive material layer composed of a titanium nitride layer is vapor-deposited on the whole surface of the upper layer with an average layer thickness ranging from 0.5 to 5 m, an abrasive liquid mixed with Al₂O₃ fine grains is injected thereto by wet blasting, thereby polishing the surface of the -type Al₂O₃ layer with the abrasive material layer of the clamp piece abutting part left unpolished to obtain a surface roughness Ra of 0.2 m or smaller.;COPYRIGHT: (C)2007,JPO&INPIT