Heat treatment method

Details Heat treatment method Heat treatment method

1979-11-29

1981-08-25

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 203, C21D 148

Patent

active

042857422

ABSTRACT:
In order to decarburize ferrous metal without recourse to an exothermic generator, an inert gas (typically nitrogen), water and a liquid or vaporous compound of carbon, hydrogen and oxygen (typically methanol) are admitted to a working chamber of the heat treatment furnace in which the metal is situated. The decarburization is preferably performed at 700.degree. to 800.degree. C. The methanol and water react to form a non-oxidizing, decarburizing atmosphere at the decarburizing temperature. The metal may be oxidized at a temperature below 600.degree. C. in another chamber of the furnace, the atmosphere from the decarburizing chamber being passed into the oxidizing chamber.

REFERENCES:
patent: 2673821 (1954-03-01), Stutzman
patent: 2875113 (1959-02-01), Fitz
patent: 4049472 (1977-09-01), Arndt
patent: 4139375 (1979-02-01), Solomon et al.
patent: 4154629 (1979-05-01), Asai et al.

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