研究论文

CaMg掺杂下夹杂物对C70S6非调质钢点蚀行为的影响

  • 孙阳庭 ,
  • 李一唯 ,
  • 吴文博 ,
  • 蒋益明 ,
  • 李劲
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  • 复旦大学 材料科学系 上海 200433
孙阳庭,男,1991年生,副研究员,博士

收稿日期: 2021-08-30

  修回日期: 2021-11-01

  网络出版日期: 2022-04-18

基金资助

国家重点研发计划项目(2018YFB0704400);国家自然科学基金项目(51901046)

Effect of Inclusions on Pitting Corrosion of C70S6 Non-Quenched and Tempered Steel Doped with Ca and Mg

  • Yangting SUN ,
  • Yiwei LI ,
  • Wenbo WU ,
  • Yiming JIANG ,
  • Jin LI
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  • Department of Materials Science, Fudan University, Shanghai 200433, China
JIANG Yiming, professor, Tel: (021)31243648, E-mail: ymjiang@fudan.edu.cn

Received date: 2021-08-30

  Revised date: 2021-11-01

  Online published: 2022-04-18

Supported by

National Key Research and Development Program of China(2018YFB0704400);National Natural Science Foundation of China(51901046)

摘要

通过溶液调制的方法对C70S6非调质钢及其掺Ca、Mg样品进行了动电位极化曲线测试,并对测试前后的样品进行了SEM-EDS表征,揭示了夹杂物对非调质钢点蚀行为的影响。结果表明,MnS夹杂易作为活性位点诱发点蚀,而掺杂Ca、Mg元素使得夹杂物分布更弥散,MnS含量更低,相应的点蚀抗性也更高。

关键词: 非调质钢; 夹杂物; 点蚀

本文引用格式

孙阳庭 , 李一唯 , 吴文博 , 蒋益明 , 李劲 . CaMg掺杂下夹杂物对C70S6非调质钢点蚀行为的影响[J]. 金属学报, 2022 , 58(7) : 895 -904 . DOI: 10.11900/0412.1961.2021.00362

Abstract

As one of the energy-saving steels, non-quenched and tempered steel commonly requires the addition of alloying elements to improve its properties. The inclusions related to those elements have significant influence on the properties of the steels. In this work, the potentiodynamic polarization curves of C70S6 non-quenched and tempered steel and its Mg-Ca doped samples were measured by solution modification, and the samples before and after the test were characterized by SEM-EDS. The results show that the MnS inclusions in the samples act as active sites for pitting. The doped Ca and Mg elements make the distribution of inclusions more dispersed and the content of MnS in each inclusion lower, leading to the better pitting resistance of the doped specimens.

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