Processes for heat treating ferrous material

Details Processes for heat treating ferrous material Processes for heat treating ferrous material

1984-02-02

1985-10-29

O'Keefe, Veronica

Metal treatment

Compositions

Heat treating

148 15, 148 165, 148 166, C21D 148

Patent

active

045499110

ABSTRACT:
Rod and wire or other ferrous material is annealed, normalized, spherodized, etc. in a furnace under nitrogen based atmospheres to which is added a mixture of methylacetylene and propadiene. This latter mixture reacts with decarburizing substances such as carbon dioxide in the furnace at relatively low temperatures of about 1000.degree.-1100.degree. F. to substantially preclude decarburization of the ferrous material. The use of a mixture of methylacetylene and propadiene in the amount of approximately 0.1-10% by volume of the furnace atmosphere also results in a relatively high CO level, reduces decarburization and oxidation of the ferrous material.

REFERENCES:
patent: 3337314 (1967-08-01), Belfit
patent: 4016011 (1977-04-01), Asai et al.
patent: 4021272 (1977-05-01), Asai et al.
patent: 4108693 (1978-08-01), L'Hermite et al.
patent: 4415379 (1983-11-01), Stanescu et al.
patent: 4461656 (1984-07-01), Ross

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