连铸板坯角部纵裂原因分析及控制措施

doi:10.13228/j.boyuan.issn1005-4006.20210119

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Abstract Aiming at the problem that the incidence of cracks at the corners of the cast slab increases after the double-strand slab caster is raised to 1.4-1.5 m/min, through chemical composition analysis of the longitudinal crack specimen and metallographic microscopic observation, scanning electron microscopy of the longitudinal crack and energy spectrum analysis, water simulation experiment to study the formation mechanism of corner cracks. The results show that there are a large number of oxidation dots on both sides of the crack, and the longitudinal crack occurs in the mold. By optimizing the amount of cooling water in the mold, controlling the reasonable inverted taper of the mold and the amount of steel through the mold, the occurrence of longitudinal cracks at the corners of the continuous casting slab is reduced.

Key words： slab longitudinal corner crack mold casting-speed water-modelling

Received: 27 September 2021

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	Articles by authors
	YANG Zhi-gang
	XU Zi-qian
	HUANG Wei-li
	DONG Gen-lai
	HUO Li-qiao

Cite this article:

YANG Zhi-gang,XU Zi-qian,HUANG Wei-li等. Research and control of longitudinal corner cracks in continuous casting slab[J]. CONTINUOUS CASTING, 2021, 40(6): 71-75.

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http://www.chinamet.cn/Jweb_lz/EN/10.13228/j.boyuan.issn1005-4006.20210119 OR http://www.chinamet.cn/Jweb_lz/EN/Y2021/V40/I6/71

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