PRODUCTION OF HIGH HARDNESS LAMINATED BODY FOR TOOL

摘要

PURPOSE:To produce a high hardness laminated body for a tool made of a joined body of a cubic BN sintered body and a hard sintered body by a single treatment at a high temp. under an ultrahigh pressure. CONSTITUTION:A low pressure phase BN molded body, a middle layer of a transition metal or a compd. thereof and a hard sintered body or a hard molded body are piled, filled into a reactor and treated at a high temp. under a static ultrahigh pressure to produce a joined body of a cubic BN sintered body and a hard sintered body. The low pressure phase BN molded body has <=100 deg. degree of selective orientation of c-axes to the principal plane. A high hardness laminated body for a tool made of the joined body can be produced by the single treatment as a body having high joining strength and free from cracks and chips.