Furnace for the heat treatment of scale-covered steel

Details Furnace for the heat treatment of scale-covered steel Furnace for the heat treatment of scale-covered steel

1982-02-17

1983-08-09

Rutledge, L. Dewayne

Metallurgical apparatus

Means treating solid metal

By contact with gas

432128, 432198, C21D 900

Patent

active

043974511

ABSTRACT:
A scale-covered, hot-rolled steel work is heated under a reducing atmosphere and is then allowed to slowly cool while placed under the reducing atmosphere. Thereafter the work is maintained at a predetermined temperature under an oxidizing atmosphere to cause the scale to be re-oxidized. The work with the re-oxidizing scale is then allowed to stand to cool quickly, imparting fine cracks to the scales. The scales can readily be removed from the work during the subsequent pickling step.

REFERENCES:
patent: 3182981 (1965-05-01), Walker
patent: 3778221 (1973-12-01), Bloom
patent: 3982887 (1976-09-01), Kendziora et al.
patent: 4079921 (1978-03-01), Iszczukiewicz

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