稀土耐候钢中不同类型夹杂物的定量方法探讨

doi:10.13228/j.boyuan.issn1001-0777.20230002

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Abstract In order to investigate the distribution situation of rare earth elements in steel, the contents of rare earth sulfide inclusions and sulfur-oxygen complex inclusions in rare earth weathering steel were accurately determined. Two kinds of weathering steels, i.e., Q235RE and Q335RE, were studied. The inclusions in steels were extracted by non-aqueous electrolytic process. Moreover, the types of inclusions, the separation methods and the contents of rare earths were investigated by X-ray diffractometer (XRD) and inductively coupled plasma emission spectrometer (ICP). The results showed that the inclusions in Q235RE and Q335RE were mainly manganese sulfide (Ce₂S₃) and sulfur-oxygen complex inclusions (RE)₂O₂S. Three separation methods, i.e., 1%-2% hydrochloric acid, 1%-2% nitric acid and 2%-3% EDTA, were used for the separation of inclusions in rare earth weathering resistant steel Q235RE. Only when EDTA was used for separation, the cementite and unstable rare earth sulfide inclusions could be dissolved, while the sulfur-oxygen complex inclusions were retained. Therefore, EDTA separation technology could be used to accurately determine the contents of rare earth elements in rare earth sulfide and rare earth sulfur oxide inclusions.

Key words： electrolytic extraction weathering steel precipitate phase inclusion separation quantitative analysis

Received: 16 January 2023

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	Articles by authors
	XU Jie
	LI Lingxia
	LI Jikang
	CHEN Ying

Cite this article:

XU Jie,LI Lingxia,LI Jikang等. Discussion on quantitative determination of different types of inclusions in rare earth weathering steel[J]. PHYSICS EXAMINATION AND TESTING, 2023, 41(3): 57-60.

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http://www.chinamet.cn/Jweb_wlcs/EN/10.13228/j.boyuan.issn1001-0777.20230002 OR http://www.chinamet.cn/Jweb_wlcs/EN/Y2023/V41/I3/57

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