本文介绍了以AlN+Sb作抑制剂制造高磁感应取向硅钢的一种新方法.确定了合适的主要成分范围,板坯加热温度,常化和淬火制度,中间退火制度和冷轧压下率.与MnS+AlN方案相比,主要工艺特点是:合适的Al_酸量,常化和淬火温度范围变宽.调整Al_酸,C量和第二次冷轧压下率,可使板坯加热温度降到1250℃.采用两次冷轧法,第二次冷轧压下率为70—83%.0.35mm厚试样在表面无应力绝缘涂层情况下的磁性:B_(10)=1.88—1.96T,W_(15)=0.95—1.05W/kg,W_(17)=1.24—1.37W/kg,达到按MnS+AlN方案制的Hi-B级产品水平.
Technical aspect of using new inhibitor AlN+Sb to produce high inductiongrain oriented Si steel were investigated.The majority in process was developed inits optimum chemical composition ranges,the reheating temperature of the slab,thenormalizing and quenching regimes of the hot-rolled band,the intermediate anneal-ing treatment and the cold-rolling reduction,which acted upon the presuppositionof the new inhibitor used Their main technological availability was distinguishedfrom ones conventionally made of the inhibitor of MnS+AlN by the suitablesoluble Al content,the extension of normalizing and quenching temperaturelimitation,the reheating temperature of slab lowered down to 1250℃ in accord-ance with the adjustment of the soluble Al and C contents and the final stage ofcold-rolling reduction,as well as the final reduction controlled from 70 to 83%with two-stage cold rolling process.The magnetic properties of the 0.35 mmthick specimen without stress insulating coating are:B_(10)=1.88-1.96T,W_(15)=0.95-1.05 W/kg and W_(17)=1.24-1.37 W/kg,which has reached an advancedlevel of Hi-B grade produced by MnS and AlN inhibitor.
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