东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (5): 653-656+672.DOI: -

• 论著 • 上一篇    下一篇

双辊薄带连铸1.2%Si无取向电工钢组织和析出物

张元祥;许云波;刘振宇;王国栋;   

  1. 东北大学轧制技术与连轧自动化国家重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50734001,50971039,51174059);;

Microstructure and precipitates of 1.2%Si non-oriented electrical steel in twin-roll strip cast process

Zhang, Yuan-Xiang (1); Xu, Yun-Bo (1); Liu, Zhen-Yu (1); Wang, Guo-Dong (1)   

  1. (1) State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Published:2013-04-04
  • Contact: Zhang, Y.-X.
  • About author:-
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摘要： 研究了双辊薄带连铸条件下,1.2%Si无取向电工钢初始组织和析出物形貌及分布规律.结果表明,在1 550℃浇注条件下,铸带经过空冷后以粗大的原始铸态铁素体组织为主,也有一部分相变产生的细小晶粒,晶粒尺寸范围为50~400μm.铸带中析出物为AlN和MnS,其中AlN析出分为高温析出和相变析出两种,高温析出AlN尺寸在0.5μm左右,相变析出AlN尺寸则在100 nm左右,二者对再结晶组织影响不大.MnS在铸带成型和成品退火过程中都有析出,尺寸范围为30~40nm.

关键词: 双辊薄带连铸, 无取向电工钢, 组织, 析出物

Abstract: The initial microstructure, the distribution and size of the precipitates in 1.2%Si non-oriented electrical steel strips were investigated under the twin-roll casting condition. The results revealed that the grain sizes range from 50 to 400 μm, including the original coarse casting grains and some fine grains formed by transformation in 1550°C pouring conditions. The precipitates of casting strip include AlN and MnS. Coarse AlN precipitates of 0.5 μm in size and a small amount AlN of 100 nm are also observed. Both have little effect on the growth of the recrystallized grain. MnS precipitates with a size ranging from 30 to 40 nm is observed in the strip and annealed samples.

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