In this invention, a cutting tool has two layers of hard sintered compact of cBN. The first sintered compact layer contains about 75 SIMILAR 98 % by volume of cBN and the first binder material. The first binder material contains 1 - 40 % by weight of Al element. The second sintered compact layer contains about 40 SIMILAR 65 % by volume of cBN and the second binder material. The second binder material contains about 2 SIMILAR 30 % by weight of Al. The first sintered compact layer is bonded to the second sintered compact layer, and this composite material is bonded directly or indirectly to a tool holder. The first sintered compact layer constitutes a rake face of the cutting tool.
申请公布号
DE69205075(D1)
申请公布日期
1995.11.02
申请号
DE1992605075
申请日期
1992.06.24
申请人
SUMITOMO ELECTRIC INDUSTRIES, LTD., OSAKA, JP
发明人
NAKAI, TETSUO, C/O ITAMI WORKS OF SUMITOMO, ITAMI-SHI, HYOGO-KEN, JP;GOTO, MITSUHIRO, C/O ITAMI WORKS OF SUMITOMO, ITAMI-SHI, HYOGO-KEN, JP