Non-oriented electrical steel sheet excellent in core loss and manufacturing method thereof

摘要

A non-oriented electrical steel sheet is characterized in that the number density of inclusions with an equivalent volume diameter of less than 100 nm contained in the steel sheet is 1×10 10 [/mm 3 ] or less, and that the steel sheet contains, by mass%, C: up to 0.01%, Si: 0.1% to 7.0%, Al: 0.1% to 3.0%, Mn: 0.1% to 2.0%, REM: 0.0003% to 0.05%, Ti: up to 0.02%, S: up to 0.005%, and N: up to 0.005%, the balance Fe and inevitable impurities and the mass% of Al represented by [Al] and the mass% of Ti represented by [Ti] satisfy the following equation (1) . log ( [ T i ] × [ N ] ) ˆ’ 1.19 × log ( [ A 1 ] × [ N ] ) + 1.84 > 0