Hard sintered compact for tools

Details Hard sintered compact for tools Hard sintered compact for tools

1990-11-21

1991-07-23

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Compositions

Consolidated metal powder compositions

75239, 75240, 75249, 419 45, C22C 2904

Patent

active

050340530

ABSTRACT:
A hard sintered compact for tools is a sintered compact obtained by super-high pressure sintering of 45-75% by vol. of cubic boron nitride powder and the remaining proportion of binder powder. The binder includes 5-25% by wt. of Al and the remaining proportion of at least one species of compounds represented by (Hf.sub.1-z M.sub.z) C, where M denotes elements of IVa, Va and VIa groups in a periodic table except for Hf, and 0.ltoreq.z.ltoreq.0.3 is satisfied. Because of this composition, improvements are made in strength, wear resistance and heat resisting property of the binder, and a hard sintered compact for tools having excellent strength and excellent wear resistance can be obtained.

REFERENCES:
patent: 4334928 (1982-06-01), Hara et al.
patent: 4342595 (1982-08-01), Bourdeau
patent: 4343651 (1982-08-01), Yazu et al.
patent: 4647546 (1987-03-01), Hall, Jr. et al.
patent: 4693746 (1987-09-01), Nakai et al.
patent: 4911756 (1990-03-01), Nakai et al.

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