Non-cyanide salt bath and process for carburization of ferrous m

Details Non-cyanide salt bath and process for carburization of ferrous m Non-cyanide salt bath and process for carburization of ferrous m

1985-02-26

1986-05-27

O'Keefe, Veronica

Metal treatment

Compositions

Heat treating

148 19, 148 20, 148 27, 148 29, 148 318, C23C 910, C21D 148

Patent

active

045913978

ABSTRACT:
A non-cyanide molten salt bath composition and process for the carburization of objects made of ferrous metals or alloys are provided. The composition comprises a molten salt mixture, at a temperature in the range of 900.degree. C. to 1050.degree. C., of an alkali metal chloride or a mixture of alkali metal chlorides; an activator consisting of an oxygen containing strontium or barium salt; and a graphite cover. The process comprises immersing the ferrous metal or alloy part in the molten mixture at a temperature in the range of 900.degree. C. to 1050.degree. C.

REFERENCES:
patent: 4153481 (1979-05-01), Foreman et al.

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