NONORIENTED ELECTRICAL STEEL SHEETS WITH SUPERIOR MAGNETIC PROPERTIES, AND METHODS FOR MANUFACTURING THEREOF

摘要

The present invention relates to nonoriented electrical steel sheets being used for the core materials of electrical machinery and equipment such as various motor, generator, small size transformer and ballast core and the like, and the object of the present invention is to provide for nonoriented electrical steel sheets with superior magnetic properties by semi-process or fully-process with proper selection of composition system of the nonoriented electrical steel sheet. Further in a method for manufacturing nonoriented electrical steel sheets with superior magnetic properties by semi-process or fully-process, which is the gist of the present invention, Ni and Cu are added to a steel comprising Si of maximum 3.5 %, Al of maximum 0.7 % and Mn of less than 1 % or 0.5 %, further, sum of one kind or two kinds of Sn and Sb are simultaneously added to make basic component system, and C, P, Ca and/or rare earth element (REM) are additionally added to the basic composition system.