Protective atmosphere process for annealing and or spheroidizing

Details Protective atmosphere process for annealing and or spheroidizing Protective atmosphere process for annealing and or spheroidizing

1979-10-23

1982-11-16

Sheehan, John P.

Metal treatment

Compositions

Heat treating

148139, C21D 148

Patent

active

043593518

ABSTRACT:
Methanol and nitrogen are injected into a furnace utilized for annealing or spheroidizing metal articles. The methanol reacts inside the furnace to provide an atmosphere with a carbon potential that will minimize or prevent carbon removal or carbon addition to the surface of the ferrous metals being treated.

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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