C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 41/87 (2006.01) C04B 41/52 (2006.01) C04B 41/89 (2006.01)
Patent
CA 2155164
Super hard composite material for tools, comprising a substrate of CBN sintered body containing more than 20 % by volume of cubic boron nitride (CBN), improved in strength of base material, wear-resistance, hardness at high temperatures and acid-resistance usable in cutting work of steels which are difficult to be machined. The substrate (2) has a laminated film (1) consisting of super thin films (a) and (b) each deposited alternatively on the substrate (2), the super thin film (a) being made of nitride and/or carbide of at least one element selected from a group comprising IVa group elements, Va group elements, VIa group elements, A1 and B and possessing a crystal structure of cubic system and metallic bond property, the super thin film (b) being made of at least one compound possessing a crystal structure other than cubic system and covalent bond property under equilibrium condition at ambient temperature and pressure, each unit layer of the super thin films (a) and (b) having a thickness of 0.2 nm to 20 nm, and the laminated film (1) on the whole possessing a crystal structure of cubic system.
Goto Mitsuhiro
Kukino Satoru
Nakai Tetsuo
Setoyama Makoto
Yoshioka Takashi
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Sumitomo Electric Industries Ltd.
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