Indexable, throwaway tip for cutting tool - consists of high speed steel or carbide coated with titanium and then with hard titanium cpd.

摘要

A metal substrate is coated on at least one surface by vapour deposition with a layer (I) of Ti,max. 2 microns thick and then at least one layer (II), 0.5-10 microns thick, of TiC, TiN, TiCN, TiCO and/or TiCNO. One pref. substrate is high speed steel coated at 300-600 deg.C. Another pref. substrate is a hard metal carbide, nitride or carbonitride contg. 2-30% of a metal in the Fe gp., and coated at 300-800 deg.C. Coating is pref. in a vacuum chamber, using evapn.CVD ion plating sputtering or a low temp. plasma jet. An excellent bond is obtd. on the substrate and the working life of tips is increased.