Hard sintered compact for tools

Details Hard sintered compact for tools Hard sintered compact for tools

1992-06-25

1995-03-07

Walsh, Donald P.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428548, 428551, 428557, 428564, 428565, 428568, 428569, 75236, 75237, 75238, 75249, B22F 706

Patent

active

053957008

ABSTRACT:
In this invention, a cutting tool comprises two layers of hard sintered compact of cBN. The first sintered compact layer comprises about 75-98% by volume of cBN and a first binder material. The first binder material comprises from about 1 to out 40% by weight of Al. The second sintered compact layer comprises from about 40 to about 65% by volume of cBN and a second binder material. The second binder material comprises about 2 to about 30% by weight of Al. The first sintered compact layer is bonded to the second sintered compact layer. This composite material is bonded directly or indirectly to a tool holder to form a cutting tool. The first sintered compact layer constitutes a rake face of the cutting tool.

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Patent Abstracts of Japan, vol. 11, No. 322 (C-453) (2769) 20 Oct. 1987 & JP-A-62 109 975 (Toshiba Tungalogy) 21 May 1987 *abstract*.

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