Method for a surface treatment of an iron, ferrous alloy or ceme

Details Method for a surface treatment of an iron, ferrous alloy or ceme Method for a surface treatment of an iron, ferrous alloy or ceme

1975-10-17

1977-02-22

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

C25D 366

Patent

active

040090868

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

REFERENCES:
patent: 2820745 (1958-01-01), von Bichowsky
patent: 3697390 (1972-10-01), McCawley et al.
patent: 3827954 (1974-08-01), McCawley et al.

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