东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (9): 1265-1269.DOI: 10.3969/j.issn.1005-3026.2015.09.011

• 材料与冶金 • 上一篇    下一篇

表面喷丸硅钢的低温渗硅与参数的影响

刘刚1， 莫成刚1， 沙玉辉2， 左良2   

  1. (1. 东北大学 研究院， 辽宁 沈阳110819； 2. 东北大学 材料电磁过程研究教育部重点实验室， 辽宁 沈阳110819)
  • 收稿日期:2014-08-09 修回日期:2014-08-09 出版日期:2015-09-15 发布日期:2015-09-14
  • 通讯作者: 刘刚
  • 作者简介:刘刚(1963-)，男，辽宁铁岭人，东北大学教授； 沙玉辉(1969-)，男，辽宁岫岩人，东北大学教授，博士生导师； 左良(1963-)，男，安徽桐城人，东北大学教授，博士生导师.
  • 基金资助:
    国家高技术研究发展计划项目(2012AA03A505)

Low-Temperature Siliconizing of Silicon Steel Subjected to Shot Peening and Effect of Siliconizing Parameter

LIU Gang1， MO Cheng-gang1， SHA Yu-hui2， ZUO Liang2   

  1. 1．Research Academy， Northeastern University， Shenyang 110819， China; 2. Key Laboratory of Electromagnetic Processing of Materials， Ministry of Education， Northeastern University， Shenyang 110819， China.
  • Received:2014-08-09 Revised:2014-08-09 Online:2015-09-15 Published:2015-09-14
  • Contact: LIU Gang
  • About author:-
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摘要： 为了用表面纳米化简化硅钢渗硅工艺及确定渗硅参数的影响，对硅钢进行了喷丸和固体粉末渗硅，用透射电镜、扫描电镜和X射线衍射等测试组织、物相和成分.结果表明:硅钢经过喷丸后，表面形成了具有随机取向的纳米晶，平均晶粒尺寸约为10nm.在硅粉+卤化物中，喷丸样品于550℃即可实现固体渗硅.提高渗硅温度和在较高的温度下延长保温时间均能显著地增加渗硅层厚度，而卤化物含量的影响不大.经过固体渗硅后，渗硅层由FeSi和Fe3Si两相组成，其中较高的温度和卤化物含量易得FeSi相，而较低的温度和卤化物含量易得Fe3Si相.

关键词: 硅钢, 喷丸, 表面纳米化, 渗硅, 组织

Abstract: A silicon steel was treated by using shot peening (SP) and followed by solid powder siliconizing treatment to investigate the possibility of simplify siliconizing operation by means of surface nanocrystallization and effect of siliconizing parameter. The microstructural evolution was examined by using transmission electron microscopy， scanning electron microscopy and X-ray diffraction， respectively. Experimental results showed that nanocrystallines (of about 10 nm in size) with random orientations form in the top surface layer of SP sample. After the siliconizing treatment in Si powder+halide at 550℃， a compound layer forms on the SP sample， and its thickness increases with the increasing of the siliconizing temperature and the duration at higher temperature， however keeps unchanged with the increment of halide content. The compound layer consists of FeSi and Fe3Si phases. The higher temperature and halide content / lower temperature and halide content are helpful for the formation of FeSi/Fe3Si phases， respectively.

Key words: silicon steel, shot peening, surface nanocrystallization, siliconizing, microstructure

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