微量稀土元素对奥氏体不锈钢21-4N显微组织及碳化物的影响

王洪利; 杜思敏; 曹美姣; 张健

doi:10.7513/j.issn.1004-7638.2020.01.021

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微量稀土元素对奥氏体不锈钢21-4N显微组织及碳化物的影响

doi: 10.7513/j.issn.1004-7638.2020.01.021

王洪利^1,2,3,
杜思敏^1,2,3,
曹美姣^3,4,
张健^1,2,3

1. 攀钢集团研究院有限公司, 四川攀枝花 617000;
2. 成都先进金属材料产业技术研究院有限公司, 四川成都 610300;
3. 海洋装备用金属材料及其应用国家重点实验室, 辽宁鞍山 114009;
4. 攀钢集团江油长城特殊钢股份有限公司技术中心, 四川江油 621701

详细信息

作者简介:
王洪利(1986-),女,四川三台人,工程师,主要工作方向:特殊钢组织与性能研究,E-mail:524114025@qq.com

中图分类号: TF76,TG142.7
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- 文章访问数: 15
- HTML全文浏览量: 6
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2019-07-15

Influence of Rare Earth on Microstructure and Carbide of 21-4N Steel

Wang Hongli^1,2,3,
Du Simin^1,2,3,
Cao Meijiao^3,4,
Zhang Jian^1,2,3

1. Pangang Group Research Institute Co., Ltd., Panzhihua 617000, Sichuan, China;
2. Chengdu Advanced Metal Materials Industrial Technology Institute Co., Ltd., Chengdu 610300, Sichuan, China;
3. State Key Laboratory of Marine Equipment Made of Metal Material and Application, Anshan 114009, Liaoning, China;
4. Changcheng Special Steel Company, Pangang Group, Jiangyou 621701, Sichuan, China

摘要

摘要: 通过对21-4N钢添加微量稀土Ce元素,分析不同Ce含量对21-4N钢铸态、锻态下的显微组织的影响。结果表明:适量稀土Ce元素的加入,可以显著细化铸态树枝晶间距、“类珠光体”团及一次碳化物M₇C₃,改善铸态“类珠光体”形貌,减少一次碳化物数量;显著细化锻态奥氏体晶粒尺寸。当Ce含量过高,铸态“类珠光体”团粗化、一次碳化物数量增加;锻态奥氏体粗化。Ce元素含量0.011%≤w(Ce)≤0.015%时,21-4N钢的铸态“类珠光体”团尺寸小、形状球化,一次碳化物细小且数量增加;锻态奥氏体晶粒细小。
- 不锈钢 /
- 21-4N /
- Ce /
- 显微组织 /
- 碳化物
Abstract: The influence of Ce on microstructure and carbide of austenitic stainless steel 21-4 N both at as-cast and as-forged states were analyzed in this paper.The results show that the dendritic spacing,pearlite-like colony and the primary carbide M₇C₃ of as-cast steel can be refined significantly by adding appropriate rare earth Ce elements.The morphology of as-cast pearlite-like colony is improved and the number of primary carbides M₇C₃ is reduced significantly.Moreover,the grain size of forged austenite is remarkably refined.But the pearlite-like colonies of as-cast steel coarsens and primary carbides increase, therefore as-forged austenite coarsens when Ce content is too high.When Ce content of 21-4 N steel is between 0.011% and 0.015%,as-cast pearlite-like colonies are smaller and spheroidized,primary carbides are refined and increased,and austenite grains are refined.
- stainless steel /
- 21-4N /
- Ce /
- microstructure /
- carbide