研究了常化温度、常化时间及常化后冷却速度对Si的质量分数为1.6%的无取向电工钢成品磁性能的影响。结果表明:在850~1 050℃范围内,随着常化温度的升高,成品铁损先减小后增大,成品磁感应强度先增大后减小;当常化温度为1 000℃时,成品平均铁损最低,平均磁感应强度最高;常化时间从3min延长到7min时,成品铁损先减小后增大,成品磁感应强度则呈单调下降趋势;随着常化冷却速度的降低,成品铁损先减小后增大,成品磁感应强度则呈单调增大趋势;对于Si的质量分数为1.6%的无取向电工钢,最佳的常化制度为:在1 000℃进行常化,时间5min,常化后空冷。对热轧板进行常化后,热轧板发生了不同程度的再结晶和晶粒长大。提高常化温度、延长常化时间、降低冷却速度,都能使常化板晶粒粗化,进而粗化成品板晶粒,改善磁性能。通过扫描电镜观察发现,成品板中析出物主要为AlN和MnS的复合析出物,以及少量的单独析出的AlN和MnS,而常化工艺主要是通过粗化析出相,减少细小析出相数量,从而减少对晶界钉扎作用来改善成品磁性能。 The effects of normalizing temperature, normalizing time and cooling rate after normalization on the magnetic properties of non-oriented electrical steel products with Si content of 1.6% were studied. The results show that in the range of 850 ~ 1 050 ℃, with the increase of normalizing temperature, the iron loss of finished product first decreases and then increases, and the magnetic induction intensity of finished product first increases and then decreases. When the normalizing temperature is 1 000 ℃ , The average iron loss of the finished product is the lowest and the average magnetic induction intensity is the highest. When the normalizing time is prolonged from 3min to 7min, the iron loss of the finished product first decreases and then increases, while the magnetic induction intensity of the finished product decreases monotonously. With the decrease of normalizing cooling speed, The finished iron loss first decreases and then increases, while the magnetic induction intensity of the finished product shows a monotone increasing trend. For the non-oriented electrical steel with a mass fraction of Si of 1.6%, the optimum normalization regime is as follows: normalization at 1 000 ℃, Time 5min, air-cooled after normalization. After the hot-rolled sheet is normalized, the hot-rolled sheet undergoes different degrees of recrystallization and grain growth. Increasing the normalizing temperature, prolonging the normalizing time and reducing the cooling rate can make the normalized plate coarsening and then coarsening the finished plate grain to improve the magnetic property. Scanning electron microscopy showed that the precipitates in the finished plate were mainly composed of composite precipitates of AlN and MnS and a small amount of separate precipitated AlN and MnS. However, the normalized process mainly consisted of roughening precipitated phases and reducing the number of fine precipitates Reduce the pinning effect on the grain boundary to improve the magnetic properties of finished products.