AlN Precipitates in High Permeability Non-Oriented Silicon Steels

摘要：

　　A characteristic of AlN precipitates in a high permeability non-oriented silicon steel was investigated.The morphology and characteristics of AlN in each production step was evaluated by means of chemical analysis,electrolytic etching method and aumatic scanning SEM.The number density,size,location,morphology and composition of precipitates were obtained.Four types of fine AlN precipitates were observed: irregular pure AlN precipitates,compound precipitates of AlN and oxide,compound precipitates of AlN and sulfide,compound precipitates of AlN,oxide and sulfide.Fine particles precipitated at the edge of grain boundaries.The generation mechanisms of these four kinds of particles were discussed.Pure AlN and the compound particle of AlN and oxide were the main precipitates and with the size of 1-3μm.AlN was confirmed to precipitate in the γ-α transformed region which occurred during cooling after hot rolling.It was believed that fine AlN precipitates played an important role in the secondary recrystallization process.Theoretical calculation of Ostwald ripening of AlN precipitates indicated that holding temperature and holding time were the main factors influencing the growth of AlN particles.

关键词： non-oriented silicon steel AlN precipitates

作者: Yan LUO Lifeng ZHANG Ming LI Lingfeng CHEN Lin CHEN Zhiyuan HU

作者单位: School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beij School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beij Qianan Iron & Steel Co.,Ltd.,Shougang Group,Qianan 064404,China;Materials Sceince and Enginnering, Qianan Iron & Steel Co.,Ltd.,Shougang Group,Qianan 064404,China

会议类型: 国际会议

会议名称: the 6th International Congress on the Science and Technology of Steelmaking,ICS2015(第六届国际炼钢科技大会)

会议地点: 北京

会议语种:英文

页码: 991-995

在线出版日期: 2015-05-12（万方平台首次上网日期，不代表论文的发表时间）