Method and apparatus for annealing steel

Details Method and apparatus for annealing steel Method and apparatus for annealing steel

C - Chemistry, Metallurgy

21

D

38/23, 148/8

C21D 9/46 (2006.01) C21D 1/26 (2006.01) C21D 1/74 (2006.01) C21D 9/54 (2006.01)

Patent

CA 1122887

1106 METHOD AND APPARATUS FOR ANNEALING STEEL ABSTRACT OF THE DISCLOSURE 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.

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