4130X连铸开浇炉钢管探伤不合格原因分析

doi:10.13228/j.boyuan.issn1001-0777.20220016

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Abstract It pointed out that the reason for flaw detection unqualified of 4130X steel pipe was the nonmetallic inclusions caused by secondary oxidation of open cast furnace. Take ø500 mm continuous casting blank as the object, several samples were taken from different positions of the casting blank. It was found that the oxygen content, nitrogen content, Al loss and nonmetallic inclusions in the steel in the open casting part were higher than those in other parts, which implied that the secondary oxidation in the open casting part was more serious. In addition, the nearlier to open casting part the quantity and distribution density of inclusions with length more than 5 μm. It is indicated that the effect of secondary oxidation on inclusions more then 5 μm is obviously when open casting.

Key words： 4130X steel pipe layering nonmetallic inclusion secondary oxidation

Received: 14 March 2022

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	Articles by authors
	ZHANG Xinwen
	SHI Jiakai
	ZHANG Chunxiang
	CHEN Kai
	XUAN Kangle

Cite this article:

ZHANG Xinwen,SHI Jiakai,ZHANG Chunxiang等. Cause analysis of flaw detection unqualified of 4130X continuous casting open cast furnace steel pipe[J]. PHYSICS EXAMINATION AND TESTING, 2023, 41(1): 40-45.

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http://www.chinamet.cn/Jweb_wlcs/EN/10.13228/j.boyuan.issn1001-0777.20220016 OR http://www.chinamet.cn/Jweb_wlcs/EN/Y2023/V41/I1/40

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