Chemistry: electrical and wave energy – Processes and products
Patent
1973-11-02
1976-01-06
Mack, John H.
Chemistry: electrical and wave energy
Processes and products
204 61, C25D 366
Patent
active
039305759
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: 2741587 (1956-04-01), Sindeband
patent: 2874454 (1959-02-01), Gullett
patent: 2933439 (1960-04-01), Gullett et al.
patent: 3697390 (1972-10-01), McCawley et al.
patent: 3713993 (1973-01-01), Mellors et al.
patent: 3827954 (1974-08-01), McCawley et al.
"Condensed Chemical Dictionary" 7th Edition, Reinhold, N.Y., Received 1969, pp. 892-893.
"Hacleh's Chemical Dictionary," 3rd Edition, Blakeston, Phila., Received 1944, pp. 450, 805-806.
Arai Tohru
Komatsu Noboru
Sugimoto Yoshihiko
Kabushiki Kaisha Toyota Chuo Kenkyusho
Mack John H.
Weisstuch Aaron
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