Abstract: The products B50A700T(≤0.003C,1.25～0.65Si)and B50A1300T(≤0.003C,0.50～0. 15Si)of scmi-process non-oriented electrical steel with coating are produced by hot metal pretreatment-top and bottom combined blowing converter-RH-CC-hot rolling-cold rolling-annealing process at Baosteel.Effect of annealing temperature at 550～900 ℃ on HV1 hardness value of the non-oriented electrical steel and effect of stress-relief annealing at 680~800 ℃ on magnetic properties of the steel were tested. For the finished semi-process non-oriented electrical steel products with coating annealed at 650~700 ℃,the core losses of designation B50A700T and designation B50A1300T stress-annealed at 750 ℃ for 2 h were 4.10 W/kg and 4.70 W/kg respectively.

Key words: Coating,Semi-process,Electric Steel,Annealing

摘要： 宝钢涂层半工艺无取向电工钢产品B50A700T(≤0.003%C、1.25%～0.65%Si)和B50A1300T(≤0.003%C、0.50%～0.15%Si)由铁水预处理-顶底复吹转炉-RH-连铸-热轧-冷轧-退火工艺生产。试验了成品退火温度550～900℃对该无取向电工钢HV1硬度值的影响和680～800℃消除应力退火对该钢磁性的影响。在采用成品退火温度650～700℃生产的涂层半工艺无取向产品,经750℃×2 h消除应力退火后,牌号B50A700T的铁损为4.10 W/kg,而牌号B50A1300T的铁损为4.70 W/kg。

关键词: 涂层 , 半工艺, 电工钢, 退火