Patent ID: 6224968
Filing Date: 2001-05-01
Classification: B23B,C23C,Y10T

Abstract:
A composite comprising a substrate body with a multilayer coating which includes at least:a) a first, 0.5 .mu.m to 2 .mu.m thick inner layer of TiN;b) a second, 9 .mu.m to 13 .mu.m thick layer of a carbonitride of an element of the group IVa of the periodic system;c) a third, at least 2 .mu.m thick of Al.sub.2 O.sub.3 or ZrO.sub.2 ; andd) a fourth outer layer of a carbonitride of Zr, Hf, V, Nb, Ta or Cr with a thickness in the range of 2 .mu.m to 6 .mu.m .