Review of the Recent Development of Electrical Sheet Steel in Japan

Abstract

Progreu during last decade has been remarkable. JVon -oriented eleclrical st ~els with excellent semi-organic coat illgs were develo/)ed. This hellJed to imlJrove the productivity great!)' ky im/Jroving the workabili(y. Amollg Ihe grain-oriented electrical steels, the develolJlnenl of ones wilh high /Iermeability i , Iloted. Wilh these sleels lhe remarkab(y redllced hysleresis loss altained ky ({ high degree ~f grain orientalioll alignmelll alld Ihe reduclioll of Ihe eddy curren I loss by III eons ~f tell.sile slress induced by surface coatill/!, are the esselliial .features. Trall sform ers made from these steels ha ve de-//I ollstrated their superiority over convenlional cOlllllerparts il/ Iheir lou'er tolalloss , lower exciling flo wer and lower I/oise .