Method of sealing an inner cover arranged in a box annealing fur

Details Method of sealing an inner cover arranged in a box annealing fur Method of sealing an inner cover arranged in a box annealing fur

1980-07-07

1982-01-19

Rutledge, L. Dewayne

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148110, 148111, H01F 104

Patent

active

043115381

ABSTRACT:
The use of coarse sand particles having an average size of 0.5-10 mm in the sealing of the lower end portion of an inner cover, which is arranged in a box annealing furnace, at the final annealing, in the production of grain-oriented silicon steel sheets, can maintain the interior of the inner cover at a low dew point atmosphere. It can also substantially prevent the exfoliation of forsterite insulating film from the coiled steel sheet surface at the upper and lower edge portions of the coiled steel sheet.

REFERENCES:
patent: 4190469 (1980-02-01), Ichida et al.
patent: 4202711 (1980-05-01), Littman et al.
patent: 4207123 (1980-06-01), Reynolds et al.
The Condensed Chemical Dictionary, 8th Ed., Von Nostrand Reinhold Co., pp. 598 and 957, 1971.
The Making Shaping and Treating of Steel, United States Steel, 8th Ed., 1964, pp. 1063-1064.

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