Surface-coated cutting member

Details Surface-coated cutting member Surface-coated cutting member

1987-03-05

1988-11-01

Terapane, John F.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having metal particles

428564, B22F 702

Patent

active

047819898

ABSTRACT:
A surface-coated cutting member includes a substrate, a metal layer vapor-deposited on a surface of the substrate and a hard coating vapor-deposited on the metal layer. The substrate is made of hard material selected from the group consisting of tungsten carbide-based cemented carbide, titanium carbo-nitride based cermet and high speed steel. The metal layer is made of metal selected from Group IVa of the Periodic Table and has an average thickness of 0.1 to 1 .mu.m. The hard coating has an average thickness of 1 to 9 .mu.m, and includes an inner layer of an average thickness of 0.2 to 4 .mu.m vapor-deposited on the metal layer, an intermediate layer of an average thickness of 0.2 to 4 .mu.m vapor-deposited on the inner layer and an outer layer of an average thickness of 0.2 to 3 .mu.m vapor-deposited on the intermediate layer. The inner layer is made of carbide or carbo-nitride of metal selected from Group IVa of the Periodic Table, and the intermediate layer is made of carbo-nitride of metal selected from Group IVa of the Periodic Table. The outer layer is made of nitride of metal selected from Group IVa of the Periodic Table.

REFERENCES:
patent: 3791852 (1974-02-01), Bunshah
patent: 4035541 (1977-07-01), Smith et al.
patent: 4101703 (1978-07-01), Schintlmeister
patent: 4268582 (1981-05-01), Hale et al.
patent: 4337300 (1982-06-01), Itaba et al.
patent: 4450205 (1984-05-01), Itaba et al.
patent: 4554201 (1985-11-01), Andreev et al.

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