Method of producing cold rolled, silicon-alloyed electric sheets

Details Method of producing cold rolled, silicon-alloyed electric sheets Method of producing cold rolled, silicon-alloyed electric sheets

1974-10-21

1976-10-26

Satterfield, Walter R.

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

148 3155, 148112, H01F 104

Patent

active

039881776

ABSTRACT:
A method of producing cold rolled, silicon-alloyed electric sheets from a vacuum decarburized steel involves decarburizing and recrystallizing annealing of the sheets in a continuous furnace. The recrystallization behavior of the sheets is influenced in such a way that a coarse grain and low watt losses are achieved. In the vacuum decarburized melt a manganese content, lying between 0.25 and 0.80% by weight, is adjusted. The slab temperature prior to hot rolling is kept below a particular temperature that depends on the manganese content according to the equation ##EQU1## Hot rolling of the sheets is effected at a final rolling temperature lying above 840.degree. C and the decarburizing and recrystallizing annealing of the cold rolled sheet is carried out over a period of not more than 4 minutes, whereby the carbon content is reduced to less than 0.003% by weight.

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patent: 3764406 (1973-10-01), Littmann
patent: 3770517 (1973-11-01), Gray et al.
patent: 3867211 (1975-02-01), Easton

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