Coated cemented carbide tool

Details Coated cemented carbide tool Coated cemented carbide tool

1988-07-07

1990-10-30

Schmidt, Frederick R.

Cutters, for shaping

Comprising tool of specific chemical composition

428698, 428699, B23P 1528

Patent

active

049665014

ABSTRACT:
A coated cemented carbide tool insert with a lengthened life is provided which comprises a substrate of a cemented carbide and a coating film provided thereon consisting of one or more layers of 2 to 20 .mu.m in thickness, each consisting of a compound with a higher hardness than the substrate, in which at least the surface of the coating film, on and near the ridgeline of cutting tip, of the surfaces of the tool is substantially composed of a smooth surface with a surface roughness Rmax of at most 0.2 .mu.m to the standard length of 5 .mu.m.

REFERENCES:
patent: 4239819 (1980-12-01), Holzl
patent: 4616963 (1986-10-01), Habert et al.
patent: 4720437 (1988-01-01), Chudo et al.
Patent Abstracts of Japan, vol. 7, No. 61, Mar. 15, 1983.
JP-A-57 210 970 Mitsubishi Kinzokuk. K. 1982 Abstract.

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