常化温度对无取向电工钢组织和性能的影响

Influence of normalizing temperature on microstructure and properties of non-oriented electrical steel sheets

研究了常化温度对无取向电工钢组织及性能的影响。结果表明:常化板织构特征呈现织构梯度分布,中心层分布的主要是{100}〈021〉、{114}〈481〉、{112}〈421〉等α^(*)取向晶粒,Goss和黄铜等取向晶粒则主要分布于表层及次表层区域。经5 min常化处理,常化温度由840℃提升到920℃,常化板晶粒尺寸增加,成品板晶粒尺寸增加,铁损值P_(1.5/50)降低约0.106 W/kg,成品板中心层{100}取向晶粒体积分数增加,{111}和{112}取向晶粒体积分数降低,织构得以改善,磁感B_(5000)升高约0.0167 T。

The effects of normalizing temperature on the microstructure and properties of non-oriented electrical steel were studied in this paper.The results showed that the texture characteristics of the normalized plate showed gradient distribution.The center layer textures were mainly α^(*) oriented grain of{100}〈021〉,{114}〈481〉,{112}〈421〉,and the surface and subsurface textures were mainly Goss and brass oriented grain.When the normalization temperature raised from 840℃ to 920℃ after 5min normalization treatment,the grain sizes of normalized plate and finished plate were increased and the texture were improved,the volume fraction of{100}oriented grains increased and the{111}and{112}oriented grains decreased in the center layer of finished plate,the iron loss P_(1.5/50) decreased by about 0.106 W/kg,the magnetic induction B_(5000) increased by about 0.0167 T.