末端电磁搅拌对弹簧钢连铸坯内部质量的影响

doi:10.13228/j.boyuan.issn0449-749x.20190358

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Abstract The 55SiCrA spring steel is prone to be affected by inner quality problems in continuous cast billets. Appropriate final electromagnetic stirring (F-EMS) can effectively improve the inner quality of the billets,however,the unreasonable stirring parameters fail to improve the inner quality of the continuous casting billets,or even deteriorate the inner quality. In order to improve the inner quality of the continuous casting billets and to obtain the optimal F-EMS scheme,the influence of F-EMS parameters was studied on the inner quality of 55SiCrA billet with a section size of 150 mm×150 mm. The solidification condition of the casting blank under the current process was analyzed by establishing a solidification and heat transfer model,and the position of F-EMS was determined to be 8.45-8.73 m away from the meniscus. On the basis of measuring the center magnetic induction intensity of the billets under F-EMS,the matching of current and frequency is studied,and the corresponding industrial tests are conducted. The results indicate that the comprehensive quality of the continuous casting billet is best when the F-EMS parameter is 300 A/8 Hz. For billets,the average center carbon segregation index reaches 1.007,the center pipe of the continuous casting blank is improved,and the central equiaxed crystal ratio is increased.

Key words： spring steel final electromagnetic stirring center carbon segregation center pipe

Received: 02 August 2019

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	Articles by authors
	WANG Xing-yu
	HAN Yan-shen
	LIU Qing
	XIAO Dong
	CHEN Jun
	GUAN Min

Cite this article:

WANG Xing-yu,HAN Yan-shen,LIU Qing等. Effect of F-EMS on inner quality of spring steel continuous casting billet[J]. Iron and Steel, 2020, 55(5): 59-67.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20190358 OR http://www.chinamet.cn/Jweb_gt/EN/Y2020/V55/I5/59

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