Hard metal watch case with a resistant coating

Details Hard metal watch case with a resistant coating Hard metal watch case with a resistant coating

1985-05-07

1987-02-03

Swisher, Nancy

Stock material or miscellaneous articles

Composite

Of metal

428698, 428699, 428627, 428657, B32B 900, B32B 1504

Patent

active

046408690

ABSTRACT:
The watch case has its body fashioned of hard metal of hardness preferably greater than 1400 Vickers. The body is overlaid by a two layer coating. The chemical composition of the two layers is identical and comprises the combination of a metal and an element whose atomic number is less than 9. The first layer is deposited by CVD and the second by PVD. If the metal is titanium and the element nitrogen there is obtained on the body of the scratch proof case a perfectly adhering hard coating of gold color.

REFERENCES:
patent: 3242664 (1966-03-01), Lederrey
patent: 4101703 (1978-07-01), Schintlmeister
patent: 4252862 (1981-02-01), Nishida
Schintlmeister et al, "Cutting Tool Materials", Wear, 100, 1984, 153-169, CVD, Metallwerk Plansee.

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