The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1976
Filed:
Oct. 21, 1974
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.