Patent ID: 6338879
Filing Date: 2002-01-15
Classification: C23C

Abstract:
A method for manufacturing a solid lubricant film for a coated cutting tool including a drill, an end mill or a tap, having a substrate made of a tool steel, a high-speed steel, a cemented carbide, a cermet or a ceramic and being coated with a hard material including any one of TiN, TiCN, TiAIN, or combinations thereof comprising:depositing on the coated cutting tool a solid lubricant oxide film (MOx:0.2&lE;x <2) including oxygen as a main ingredient, with M being a metal consisting of any one of Si, Zr, Ni, Fe, Co, Cr or combinations thereof, wherein the solid lubricant oxide film has a thickness (t), where: 0.01 &mgr;m&lE;t<2.0 &mgr;m, and said depositing comprises the steps of: heating a vacuum ion-plating chamber from room temperature to a temperature between from 150Â° C. to 450Â° C. and depositing the solid lubricant oxide film by ion-plating by one of (1) applying a negative bias voltage charge of a direct current of from âˆ’15 V to âˆ’1000 V and (2) applying a high frequency alternating current having an effective negative bias voltage charge equivalent to those of the direct current of from âˆ’15 V to âˆ’1000 V.