稀土对含铜锡铁素体不锈钢中非金属夹杂物的影响

doi:10.13228/j.boyuan.issn0449-749x.20180045

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Abstract Based on the principle of minimum Gibbs free energy of FactSage thermodynamic software，the transformation rules of the inclusions in the steel were simulated under different amount of the rare earth，and the effect of rare earth elements on the non-metallic inclusions and the purification of molten steel were studied in copper-tin-bearing ferritic stainless steel. Through the laboratory experiment of the small crucible thermal simulation，it was found that the inclusions such as Al2O3 transformed into lower-hardness CeAlO3，MnS gradually transformed into CeS with the increase of rare earth content. The inclusions of the steel gradually transformed into spherical inclusions contained rare earth and the size of inclusions were between 1-3 μm. The total amount of inclusions began to decrease in the steel. Moreover，when the mass percent of rare earth increased to 0.057%，CeAlO3 transformed into Ce2O3，MnS also completely transformed into CeS. But the size and the number of inclusions began to increase，the steel liquid was further contaminated. From the point of inclusions controlling，the best addition of rare earth in this experiment was 0.035%.

Received: 29 January 2018 Published: 26 October 2018

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	Articles by authors
	DU Peng-Fei
	LI Yang
	JIANG Zhou-Hua
	YAO Cong-Lin
	QIN Guo-Qing
	YANG Guang
	BO Lu

Cite this article:

DU Peng-Fei,LI Yang,JIANG Zhou-Hua等. Effect of rare earth on nonmetallic inclusions in copper-tin-bearing ferritic stainless steel[J]. Iron and Steel, 2018, 53(10): 32-37.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20180045 OR http://www.chinamet.cn/Jweb_gt/EN/Y2018/V53/I10/32

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