Method for a surface treatment of cemented carbide article

Details Method for a surface treatment of cemented carbide article Method for a surface treatment of cemented carbide article

1973-11-13

1976-05-25

Andrews, R. L.

Chemistry: electrical and wave energy

Processes and products

C25D 1100

Patent

active

039590925

ABSTRACT:
A method for forming a very hard layer on the surface of an iron, ferrous alloy or cemented carbide article in a treating molten bath, comprising preparing the treating molten bath composed of boron oxide and chromium, immersing the article in the treating molten bath and applying an electric current to the treating molten bath through said article being used as the cathode, thereby forming a very hard layer composed of chromium carbide and/or chromium boride on the surface of said article. The method of this invention can quickly form a uniform and dense layer on the surface of the article and can be carried out in the open air.

REFERENCES:
patent: 556092 (1896-03-01), Frolich
patent: 2746915 (1956-05-01), Giesker et al.
patent: 2950233 (1960-08-01), Steinberg et al.
patent: 2984605 (1961-05-01), Cooper et al.
patent: 3485725 (1969-12-01), Koretzky
patent: 3671297 (1972-06-01), Komatsu et al.

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