稀土处理HRB400E钢洁净度研究

doi:10.13228/j.boyuan.issn1005-4006.20200010

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Abstract In order to study the effect of rare earth （RE） on the composition and morphology of inclusions in HRB400E steel, the possible inclusions in the treated steel were calculated by thermodynamics, and the inclusions in HRB400E steel before and after rare earth treatment were characterized and analyzed by SEM and EDS. The result showed that Rare earth can be added in the smelting process of screw steel and the amount of added rare earth can reach 0.003 2%; the rare earth can purify the molten steel and reduce the S content of the steel from 0.018% to 0.004% by 77.78%; When the content of rare earth is 0.003 2%, the results of the thermodynamic show that order of the possible inclusion formation in the steel is REAlO₃>RE₂O₂S>Al₂O₃. The rare earth element plays a certain role in the modification of sulfur and oxygen inclusions. The inclusions are modified into RE₂O₂S and REAlO₃,the combination of rare earth elements and S reduces the precipitation of MnS inclusions in steel, which improves the properties of the steel．

Key words： rare earth HRB400E thermodynamics inclusion

Received: 12 February 2020

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	Articles by authors
	KANG Jian
	YU Yan-chong
	MENG Xiao-liang
	WANG She-bin

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KANG Jian,YU Yan-chong,MENG Xiao-liang等. Research on cleanliness of HRB400E steel treated with rare earth[J]. CONTINUOUS CASTING, 2020, 39(3): 38-42.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20200010 OR http://www.chinamet.cn/Jweb_lz/EN/Y2020/V39/I3/38

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