Patents by Inventor Karl Ecker

Karl Ecker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 3988177
    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.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: October 26, 1976
    Assignee: Vereinigte Osterreichische Eisen- und Stahlwerke-Alpine Montan Aktiengesellschaft
    Inventors: Karl Ecker, Ingeborg Richter, Max Mayrhofer