Patent ID: 7902098
Filing Date: 2011-03-08
Classification: B22F,B23B,B32B,C04B,C22C,Y10T

Abstract:
1. A cubic boron nitride sintered material constituted from cubic boron nitride particles that are bound by a binder phase, wherein said binder phase contains a carbide of at least one kind of metal element selected from among metals of groups 4, 5 and 6 of the periodic table and a nitride of at least one kind of metal element selected from among metals of groups 4, 5 and 6 of the periodic table coexisting therein, wherein the proportion of the carbonitride content of at least one kind of metal element selected from among metals of groups 4, 5 and 6 of the periodic table is 5% by weight or less to the entire cubic boron nitride sintered material, and wherein the residual compressive stress σ cBN of 300 MPa or more remains on said cubic boron nitride particles.