稀土对L360管线钢低温冲击性能的影响

doi:10.13251/j.issn.0254-6051.2023.05.019

金属热处理 ›› 2023, Vol. 48 ›› Issue (5): 116-120.DOI: 10.13251/j.issn.0254-6051.2023.05.019

稀土对L360管线钢低温冲击性能的影响

王红莉¹, 奉亮², 樊轩宇², 于彦冲²

1.信阳职业技术学院汽车与机电工程学院, 河南信阳 464000;
2.太原理工大学材料科学与工程学院, 山西太原 030024

收稿日期:2022-11-15 修回日期:2023-03-27 出版日期:2023-05-25 发布日期:2023-06-21
通讯作者: 于彦冲,副教授,博士,E-mail:yuyanchong0205@163.com
作者简介:王红莉(1980—),女,讲师,主要研究方向为电器工程及自动化,E-mail: 1009423083@qq.com。
基金资助:
国家自然科学基金(52004180);中国博士后科学基金(2020M683706XB);山西省面上青年基金(201901D211014)

Effect of rare earth on low temperature impact property of L360 pipeline steel

Wang Hongli¹, Feng Liang², Fan Xuanyu², Yu Yanchong²

1. School of Automotive and Mechatronic Engineering, Xinyang Vocational and Technical College, Xinyang Henan 464000, China;
2. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan Shanxi 030024, China

Received:2022-11-15 Revised:2023-03-27 Online:2023-05-25 Published:2023-06-21

摘要/Abstract

摘要： 工业化生产L360RE管线钢,研究了微量稀土对L360钢中夹杂物变质以及热轧组织和低温冲击性能的影响。结果表明,L360管线钢中添加0.0062%的稀土,可使O、S含量显著降低,钢液的洁净度显著提高;夹杂物种类由MnS夹杂物和Al₂O₃-CaO复合夹杂物转变成含稀土的RE₂O₂S夹杂物,且大尺寸的长条状或不规则形状的夹杂物转变为小尺寸的球状夹杂物;晶粒尺寸减小,显微组织细化;室温至－60 ℃的横向冲击能量均增加。－60 ℃下,L360RE管线钢的横向冲击吸收能量较L360管线钢提高了19.2%。

关键词: 稀土, L360管线钢, 夹杂物, 低温冲击性能

Abstract: L360RE pipeline steel was industrial produced, and the effect of trace rare earth elements on inclusion modification, hot rolled microstructure and low temperature impact property of the L360 pipeline steel was studied. The results show that adding 0.0062% rare earth, the content of O and S in the L360 pipeline steel is sharply reduced, the cleanliness of molten steel is significantly improved. The type of inclusions changes from MnS inclusions and Al₂O₃-CaO composite inclusions to RE₂O₂S rare earth inclusions, and the original large-size strip-shaped or irregular inclusions become small-size spherical inclusions, and the grain size decreases and the microstructure is refined, the transverse impact absorbed energy from room temperature to -60 ℃ is increased. At -60 ℃, the transverse impact absorbed energy of the L360RE pipeline steel is 19.2% higher than that of L360 pipeline steel.

Key words: rare earth, L360 pipeline steel, inclusion, low temperature impact property

中图分类号:

TG142.31

王红莉, 奉亮, 樊轩宇, 于彦冲. 稀土对L360管线钢低温冲击性能的影响[J]. 金属热处理, 2023, 48(5): 116-120.

Wang Hongli, Feng Liang, Fan Xuanyu, Yu Yanchong. Effect of rare earth on low temperature impact property of L360 pipeline steel[J]. Heat Treatment of Metals, 2023, 48(5): 116-120.

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稀土对L360管线钢低温冲击性能的影响

Effect of rare earth on low temperature impact property of L360 pipeline steel

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