Coated carbide alloy cutting member exhibiting excellent resistance against chipping

摘要

A coated carbide alloy cutting member is provided exhibiting excellent resistance against chipping, wherein the cutting member has a cemented carbide substrate and one or more hard coating layers including an aluminum oxide-based layer primarily of aluminum oxide, the hard coating layers having an average thickness of 3 to 20 mu m and being formed on the cemented carbide substrate by chemical and/or physical vapor deposition; and wherein the aluminum oxide-based layer contains 0.005 to 0.5 percent by weight of chlorine.