J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (8): 759-762.

• Research Articles • 上一篇    下一篇

取向电工钢中的高斯晶粒非正常长大

郭炜1,毛卫民2   

  1. 1. 北京科技大学
    2.
  • 收稿日期:2009-10-12 修回日期:2009-12-28 出版日期:2010-08-28 发布日期:2010-08-23
  • 通讯作者: 郭炜
  • 基金资助:

    国家自然科学基金

Abnormal Growth of Goss Grains in Grain-oriented Electrical Steels

Wei Guo1), Weimin Mao2)   

  1. 1) Department of Materials, University of Science and Technology Beijing, Beijing 100083, China
    2) State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
  • Received:2009-10-12 Revised:2009-12-28 Online:2010-08-28 Published:2010-08-23
  • Supported by:

    the National Natural Science Foundation of China (Grant No. 50871015)

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摘要：

With the help of electron back scattering diffraction techniques and field emission microscope, the misorientation and the precipitation environment of Goss grains in conventional grain-oriented steel were observed and investigated at the initial stage of secondary recrystallization. It reveals that the abnormal Goss grains have a high fraction of high angle boundaries ranging from 25° to 40°. The most important observation is that some of {110}<001> grains in matrix indicated higher particle density than their neighbor grains during final annealing at 875oC before secondary recrystallization., which could create a favorable environment for their abnormal grain growth. Based on misorientation and precipitation results, the abnormal growth mechanism of Goss grains was sketched.

关键词: 再结晶, 析出物, 高斯晶粒, 反常晶粒长大, 取向电工钢

Abstract:

With the help of electron back scattering diffraction techniques and field emission microscope, the misorientation and the precipitation environment of Goss grains in conventional grain-oriented steel were observed and investigated at the initial stage of secondary recrystallization. It reveals that the abnormal Goss grains have a high fraction of high angle boundaries ranging from 25 to 40 deg. The most important observation is that some of {110}<001> grains in matrix indicated higher particle density than their neighbor grains during final annealing at 875°C before secondary recrystallization, which could create a favorable environment for their abnormal grain growth. Based on misorientation and precipitation results, the abnormal growth mechanism of Goss grains was sketched.

Key words: Recrystallization, Precipitates, Goss grain, Abnormal grain growth, Grain-oriented electrical steel