Characterization of Microstructure and Texture in Grain-Oriented High Silicon Steel by Strip Casting
来源期刊：Acta Metallurgica Sinica2015年第11期
论文作者：Xiang Lu Yun-Bo Xu Feng Fang Yuan-Xiang Zhang Yang Wang Hai-Tao Jiao R.D.K.Misra Guang-Ming Cao Cheng-Gang Li Guo-Dong Wang
文章页码：1394 - 1402
摘 要：Grain-oriented 4.5 wt%Si and 6.5 wt%Si steels were produced by strip casting,warm rolling,cold rolling,primary annealing,and secondary annealing.Goss grains were sufficiently developed and covered the entire surface of the secondary recrystallized sheets.The microstructure and texture was characterized by OM,EBSD,TEM,and XRD.It was observed that after rolling at 700 ℃,the 6.5 wt%Si steel exhibited a considerable degree of shear bands,whereas the4.5 wt%Si steel indicated their rare presence.After primary annealing,completely equiaxed grains showing strong γ-fiber texture were presented in both alloys.By comparison,the 6.5 wt%Si steel showed smaller grain size and few favorable Goss grains.Additionally,a higher density of fine precipitates were exhibited in the 6.5 wt%Si steel,leading to a 30-s delay in primary recrystallization.During secondary annealing,abnormal grain growth of the 6.5 wt%Si steel occurred at higher temperature compared to the 4.5 wt%Si steel,and the final grain size of the 6.5 wt%Si steel was greater.The magnetic induction B8 of the 4.5 wt%Si and the 6.5 wt%Si steels was 1.75 and 1.76 T,respectively,and the highfrequency core losses were significantly improved in comparison with the non-oriented high silicon steel.
Xiang Lu1，Yun-Bo Xu1，Feng Fang1，Yuan-Xiang Zhang1，Yang Wang1，Hai-Tao Jiao1，R.D.K.Misra2，Guang-Ming Cao1，Cheng-Gang Li1，Guo-Dong Wang1
1. State Key Laboratory of Rolling and Automation,Northeastern University2. Laboratory for Excellence in Advanced Steel Research,Department of Metallurgical,Materials and Biomedical Engineering,University of Texas at El Paso
摘 要：Grain-oriented 4.5 wt%Si and 6.5 wt%Si steels were produced by strip casting,warm rolling,cold rolling,primary annealing,and secondary annealing.Goss grains were sufficiently developed and covered the entire surface of the secondary recrystallized sheets.The microstructure and texture was characterized by OM,EBSD,TEM,and XRD.It was observed that after rolling at 700 ℃,the 6.5 wt%Si steel exhibited a considerable degree of shear bands,whereas the4.5 wt%Si steel indicated their rare presence.After primary annealing,completely equiaxed grains showing strong γ-fiber texture were presented in both alloys.By comparison,the 6.5 wt%Si steel showed smaller grain size and few favorable Goss grains.Additionally,a higher density of fine precipitates were exhibited in the 6.5 wt%Si steel,leading to a 30-s delay in primary recrystallization.During secondary annealing,abnormal grain growth of the 6.5 wt%Si steel occurred at higher temperature compared to the 4.5 wt%Si steel,and the final grain size of the 6.5 wt%Si steel was greater.The magnetic induction B8 of the 4.5 wt%Si and the 6.5 wt%Si steels was 1.75 and 1.76 T,respectively,and the highfrequency core losses were significantly improved in comparison with the non-oriented high silicon steel.
关键词：
