Apparatus for annealing steel

Details Apparatus for annealing steel Apparatus for annealing steel

1979-03-12

1980-12-09

Rutledge, L. Dewayne

Metallurgical apparatus

Means treating solid metal

By contact with gas

34 72, 34 78, 266252, 266257, 432 23, C21D 106

Patent

active

042381223

ABSTRACT:
Individual charges of silicon steel are passed through a tunnel type furnace provided with charge and discharge vestibules. The annealing takes place in a hydrogen atmosphere and the vestibules are purged with nitrogen and then with hydrogen. The hydrogen used for purging is taken from the hydrogen in the annealing atmosphere and additional new hydrogen is added to the annealing atmosphere at the same time to maintain the pressure constant.

REFERENCES:
patent: 2955062 (1960-10-01), Cullen et al.
patent: 3606289 (1971-09-01), Bloom
patent: 3778221 (1973-12-01), Bloom

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