Patent ID: 8043728
Filing Date: 2011-10-25
Classification: B32B,C23C,Y10T

Abstract:
1. A hard coating film for coating a forming die of an alloy comprising iron and a Cr-containing precipitated carbide, said hard coating film comprising: a first coating layer A of a thickness between 3 and 10 μm formed on the forming die of the alloy; and a second coating layer B of a thickness between 2 and 10 wherein the first coating layer A is a film of Cr wherein M is at least one element among W, V, Mo, Nb, Ti and Al, x is atomic ratio of M, a is atomic ratio of B and b is atomic ratio of C, and the second coating layer B is a film of Ti wherein X is atomic ratio of Cr, Y is atomic ratio of Al, and Z is atomic ratio of Si and wherein the forming die has a Rockwell hardness of HRC 50 or above.