Development of Semi-Processed Steels for Electrical Lamination Applications at Tata Steel

Abstract

Semi processed electrical steels are important materials in a verity of electrical machines. They offer better magnetization than equivalent fully processed grades and are subjected to decarburisation annealing treatment at customers' end for developing final magnetic properties. This paper reports the results of the silicon tree as well as silicon bearing semi-processed grades of cold rolled non-oriented(CRNO)steels developed at Tata Steel for electrical lamination applications. Both the grades were processed through LD steel making, secondary steel making (LF/RH), continuous casting, hot rolling, cold rolling, batch annealing followed by skin pass/temper rolling.