Super hard composite material for tools

Details Super hard composite material for tools Super hard composite material for tools

1995-08-01

1999-03-16

Turner, A. A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

51293, 51295, 51307, 51309, 75238, 407119, 428469, 428698, 428699, 428704, C23C 1406

Patent

active

058827773

ABSTRACT:
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, Al 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.

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