Patent ID: 7691496
Filing Date: 2010-04-06
Classification: C23C,Y10T

Abstract:
1. A cutting tool having high toughness and abrasion resistance, comprising: a substrate selected from among a cemented carbide substrate, a cermet substrate and a ceramic substrate; and a hard coating film deposited on the substrate by means of a vapor deposition process selected from among chemical vapor deposition, moderate temperature-chemical vapor deposition and physical vapor deposition, and subjected to wet blasting using 10-300 μm sized particles to decrease a residual tensile stress or increase a residual compressive stress and reduce a surface roughness, wherein the residual compression stress of the coated cutting tool, which has been subjected to the wet blasting, is −100˜−3900 MPa on an outer layer or an outermost layer of the coating film thereof, and wherein the surface roughness of the coated cutting tool, which has been subjected to the wet blasting, is 0.05-0.100 μm at the outer layer or the outermost layer of the coating film on a cutting edge thereof.