Patent ID: 6140262
Filing Date: 2000-10-31
Classification: C04B,Y10T

Abstract:
A CBN cutting tool comprising a body of polycrystalline cubic boron nitride having a crystal size in the range of from 10 to 17 micrometers comprising:in the range of from 2 to 15% by weight of a material selected from the group of refractory compounds consisting of titanium diboride, aluminum diboride, titanium carbide, titanium nitride, titanium carbonitride, titanium aluminum carbonitride, and (Ti.sub.x M.sub.y)CN, wherein the alloying metal M may be one or more of silicon, chromium, cobalt, tungsten and tantalum and the proportion of alloying metal to titanium, y/x, is in the range of from 0.05 to 0.3, the carbonitrides having a carbon to nitrogen proportion in the range of from 30 atomic percent carbon and 70 atomic percent nitrogen to 70 atomic percent carbon and 30 atomic percent nitrogen;an infiltrant containing aluminum and/or silicon; anda balance of substantially CBN.