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材料导报  2021, Vol. 35 Issue (20): 20106-20112    https://doi.org/10.11896/cldb.20060166
  金属与金属基复合材料 |
无取向硅钢中硫化物的析出机理
乔家龙1, 郭飞虎1, 付兵2, 胡金文1,3, 项利1, 仇圣桃1
1 钢铁研究总院连铸技术国家工程研究中心,北京 100081
2 武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉 430081
3 安徽工业大学冶金与资源学院,马鞍山 243002
Precipitation Mechanism of Sulfide in Non-oriented Silicon Steel
QIAO Jialong1, GUO Feihu1, FU Bing2, HU Jinwen1,3, XIANG Li1, QIU Shengtao1
1 National Engineering Research Center of Continuous Casting Technology, China Iron & Steel Research Institute Group, Beijing 100081, China
2 State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
3 School of Metallurgy and Resources, Anhui University of Technology, Maanshan 243002, China
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摘要 结合无取向硅钢中硫化物的析出热力学、动力学计算和扫描电镜(SEM)、透射电镜(TEM)检测,系统研究了硫化物在无取向硅钢中的析出机理,并讨论了硫化物对退火过程中晶粒长大的影响。结果表明,无取向硅钢中硫化物以(Mn,Cu)S复合析出相为主。在凝固过程中,MnS和Cu2S均不具备析出热力学条件。MnS先于Cu2S在晶界形核,随着温度的降低将以位错形核为主。在均热过程中,w(Si+Al)≥2.5%的无取向硅钢中的MnS和w(Si+Al)≤1.6%的无取向电工钢中的Cu2S主要在晶界形核。同时,均热过程中MnS在晶界的析出量远大于Cu2S,Cu2S主要在后续的热处理过程中析出。MnS和Cu2S的Ostwald熟化研究表明,w(Si+Al)≥2.5%无取向硅钢中的MnS和Cu2S对晶粒长大的影响明显大于w(Si+Al)≤1.6%无取向电工钢。
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乔家龙
郭飞虎
付兵
胡金文
项利
仇圣桃
关键词:  无取向硅钢  硫化物  析出机制  形核    
Abstract: The precipitation mechanism of sulfide and the effect of sulfide on grain growth during annealing in non-oriented silicon steel were systematically studied based on the calculation of thermodynamics and kinetics, combined with scan electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicate that sulfides in non-oriented silicon steel are mainly (Mn,Cu)S composite precipitates. In the solidification process, MnS and Cu2S would not possess the precipitation thermodynamic conditions. MnS would preferentially nucleate at grain boundaries before Cu2S, and dislocation nucleation will dominate as the temperature decreases. In the soaking process, MnS in w(Si+Al)≥2.5% non-oriented silicon steel and Cu2S in w(Si+Al)≤1.6% non-oriented electrical steel are mainly nucleated at the grain boundary. Meanwhile, during the soaking process the precipitation amount of MnS is much larger than that of Cu2S in the grain boundary, and Cu2S would mainly precipitate in the subsequent heat treatment processes. Ostwald ripening calculations of MnS and Cu2S show that the effect of MnS and Cu2S in w(Si+Al)≥2.5% non-oriented silicon steel on grain growth is significantly greater than that of w(Si+Al)≤1.6% non-oriented electrical steel.
Key words:  non-oriented silicon steel    sulfide    precipitation mechanism    nucleation
               出版日期:  2021-10-25      发布日期:  2021-11-12
ZTFLH:  TF4  
基金资助: 国家重点研发计划(2016YFB0300305)
通讯作者:  qiustchina@126.com   
作者简介:  乔家龙,钢铁研究总院连铸技术国家工程研究中心博士研究生,主要从事硅钢品质提升、工艺优化和相关理论的研究。
仇圣桃,钢铁研究总院连铸技术国家工程研究中心正高工。主要从事冶金材料技术领域基础理论及工艺方面的研发工作,包括冶金过程数学仿真、电磁技术在连铸过程的应用、连铸坯均质化及铸坯质量控制、高品质钢(电工钢、压力容器、船板等)生产技术。
引用本文:    
乔家龙, 郭飞虎, 付兵, 胡金文, 项利, 仇圣桃. 无取向硅钢中硫化物的析出机理[J]. 材料导报, 2021, 35(20): 20106-20112.
QIAO Jialong, GUO Feihu, FU Bing, HU Jinwen, XIANG Li, QIU Shengtao. Precipitation Mechanism of Sulfide in Non-oriented Silicon Steel. Materials Reports, 2021, 35(20): 20106-20112.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.20060166  或          http://www.mater-rep.com/CN/Y2021/V35/I20/20106
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