Patent ID: 7967533
Filing Date: 2011-06-28
Classification: B23B,C23C,Y10T

Abstract:
1. A surface-coated cutting tool comprising a coating layer formed on a substrate, wherein assuming that the average thickness of the coating layer on a first surface and a second surface of the substrate is A, a difference between the maximum and minimum thicknesses of the coating layer is 0.04×A or less, wherein the thickness of the coating layer is the thickness at a cutting edge portion of the coating layer, wherein the first surface or the second surface of the substrate is a surface having the largest area among surfaces of the substrate and the second surface is an opposite side of the first surface, and wherein the surface-coated cutting tool is a negative tip in which each of the surfaces of the coating layer formed on the first surface and the coating layer formed on the second surface of the substrate serves as a rake face.