C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
57/17
C04B 35/58 (2006.01) B01J 3/06 (2006.01) C04B 35/5831 (2006.01) C22C 26/00 (2006.01) C22C 29/16 (2006.01)
Patent
CA 1313051
ABSTRACT OF THE DISCLOSURE A sintered compact is disclosed which is obtained by sintering under cBN-stable superhigh pressure conditions a mixture containing about 50 to 75 percent by volume of cubic boron nitride with the balance a binder. The binder contains about 20 to 50 percent by weight of Al and one or more Ti compounds selected from the group TiNz, Ti(C,N)z, TiCz, (Ti,M)Cz, (Ti,M) (C,N)z and (Ti,M)Nz (where M indicates a transition metal of group IVa, Va or VIa of the periodic table other than Ti, and z is within the range of 0.5 < z < 0.85). The atomic ratio of the content of Ti to that of the total of transition metal element M and Ti in the binder is from about 2/3 to 97/100, and the total tungsten concentration in the binder is from about 4 to 40 percent by weight.
526182
Goto Mitsuhiro
Nakai Tetsuo
G. Ronald Bell & Associates
Sumitomo Electric Industries Ltd.
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