VERFAHREN ZUR HERSTELLUNG VON NICHTORIENTIERTEM STAHLBLECH MIT HOHEM SILIZIUMGEHALT.

摘要

PCT No. PCT/JP88/00488 Sec. 371 Date Dec. 15, 1988 Sec. 102(e) Date Dec. 15, 1988 PCT Filed May 23, 1988.The present invention relates to a process for making non-oriented high Si steel sheet without problems during the sequence from the step of making molten steel to the step of rolling to final sheet thickness. An ingot (or a continuously cast piece) of high Si steel (containing 4.0 to 7.0% Si and specified with Al, Mn, C and P) is subjected to slabbing-hot rolling (or else directly slab rolling-hot rolling) and subsequently the hot rolled steel is reduced to thin thickness. The steel material is maintained at temperature of more than a determined temperature from the step of making molten steel to the step of hot rolling. In the step of hot rolling, information regarding finish rolling conditions and coiling conditions is used to provide structure suitable for the subsequent thin rolling. The hot rolled steel is then warm-rolled to the required thickness.