不同二冷比水量下24Mn钢连铸坯枝晶生长热模拟研究

doi:10.11896/cldb.23100237

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Abstract Based on the principle of numerical-physical coupling simulation, the solidification behavior of 24Mn steel under different secondary cooling water ratios was studied by using the continuous casting billet dendrite growth simulation device. The results show that with the increase of the secondary cooling water ratio, the surface and center temperatures of the slab decrease significantly, the surface temperature recovery phenomenon intensifies, the solidification rate of the slab increases, and the thickness of the solidified shell does not change significantly. Under the condition of 0.45 L/kg water ratio, the equiaxed crystal ratio of the center of the slab increases to 58.7%. While the segregation of the central elements of the slab is reduced under the condition of 0.73 L/kg water ratio, and the carbon segregation is 1.079. Through the mathematical model established, it is found that S and P are most likely to segregate on the dendritic front and form dendritic segregation during the solidification process of continuous casting billet, by increasing the cooling water ratio, the dendritic segregation can be increased to a certain extent, the macro segregation can be reduced, and the composition uniformity of the casting billet can be improved. In this work, the qualitative/quantitative relationship between continuous casting process and slab microstructure and segregation was effectively established, which provided theoretical gui-dance for high-quality continuous casting production of 24Mn steel.

Key words： 24Mn steel secondary cooling water ratio coupled simulation dendrite growth

Published: 10 March 2025 Online: 2025-03-18

CLC number:

TG142.33

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	Articles by authors
	ZHANG Kailun
	PAN Dong
	GUO Qingtao
	ZHONG Honggang
	ZHANG Yu
	ZHANG Xiangyu
	XU Pei

Cite this article:

ZHANG Kailun,PAN Dong,GUO Qingtao, et al. Thermal Simulation Study on Dendrite Growth of 24Mn Steel Continuous Casting Slab Under Different Secondary Cooling Water Ratio[J]. Materials Reports, 2025, 39(5): 23100237-8.

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https://www.mater-rep.com/EN/10.11896/cldb.23100237 OR https://www.mater-rep.com/EN/Y2025/V39/I5/23100237

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