Workability of good low iron loss non-oriented electrical steel sheet and method of manufacturing the same

摘要

[Summary] [challenge] is a stress relief grain size is small workability before annealing is good, the excellent non-oriented electrical steel sheet of iron loss to the crystal grains grow significantly after stress relief annealing, and its manufacturing method to provide. A by mass%, C: 0.010% or less, Mn: 0.1% for more than one. 5%, Si: 0.1% or 4% or less, Al: 0.1% or 4% or less, Si + M n + Al ≦ 5.0%, Mg: 0.0005% or more than 0.020%, or even Ca: 0.0005% or more, Mg + Ca: 0.020% or less, or REM: 0. 0,005% or more, Mg + REM: 0.020% or less, or Ca, REM 0.0005% or more, respectively, Mg + Ca + REM: and containing 0.020% or less, The balance Fe and workability of good low iron loss non-oriented electrical steel sheet consisting of inevitable impurity elements and a method of manufacturing the same.