Method for annealing silicon steel

Details Method for annealing silicon steel Method for annealing silicon steel

1978-04-20

1979-09-11

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 16, 266251, 266252, 266257, H01F 104

Patent

active

041674260

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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