电工钢 ›› 2020, Vol. 2 ›› Issue (3): 1-8.

• •    下一篇

取向硅钢点状露晶的检测与分析

杨平1,刘丽莹1,马丹丹1,张海利2,贾志伟2,董晨欣1   

  1. 1.北京科技大学 材料科学与工程学院,北京 100083;2.鞍钢集团有限公司 钢铁研究院, 辽宁 鞍山 114009
  • 出版日期:2020-08-28 发布日期:2020-09-08

Examination and analysis of the point bare crystals in grain oriented silicon steels

YANG Ping1, LIU Liying1, MA Dandan1, ZHANG Haili2, JIA Zhiwei2, DONG Chenxin1   

  1. 1.School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China; 2. Iron and Steel Research Institute of Ansteel Group Corporation, Anshan 114009, China
  • Online:2020-08-28 Published:2020-09-08

摘要: 露晶现象作为典型的表面质量问题会以不同程度或不同方式出现,比如局部的点状露晶与整体型的大区域露晶,成因可能不同。通过对渗氮型取向硅钢的点状露晶位置进行形貌和成分检测,对其成因进行了分析。检测到3种不同类型的点状露晶,即:1)露晶坑内只是基体成分,绝缘层与玻璃层都脱落;2)露晶坑内没有玻璃层,但有绝缘层成分;3)带黑色印环的点状露晶,坑内有不同程度的脱落。因点状露晶坑内形貌、成分的多样性,其成因也应是多样的。

关键词: 取向硅钢, 点状露晶, 表面质量

Abstract: Bare crystal is one of surface quality problems and may show its features in different extents, such as point bare crystal in small scale or large areas of bare crystals. The morphologies and local compositions of some kinds of point bare crystals in low temperature heated and nitriding grain oriented steels were examined in this paper, and the possible reasons for their formation were analyzed and suggested. The results showed that at least three kinds of point bare crystals are observed, namely, the one containing only steel matrix compositions without glass layer and insulating layer, the one that contains insulating layer but without glass layers and the one that contains a Mgrich ring band around it and lose its glass layer or insulating layer in different extents in the center. The reasons of the formation of the point bare crystals should be diverse because of the variety in their morphologies and local composition.

Key words: grain oriented silicon steels, point bare crystals, surface quality