连铸保护渣对20Mn23AlV铸坯表面微裂纹的影响

doi:10.13228/j.boyuan.issn0449-749x.20170233

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Abstract In present work，the continuous casting（CC）production of high manganese steel 20Mn23AlV in the TISCO and the slab surface cracks of the 20Mn23AlV were investigated. By means of industrial samples and the slag-metal reaction experiment，the characteristics and forming process of slab surface crack were systematically studied through the metallographic microscope，the scanning electron microscopy and the energy spectrum analysis. While the variation of indexes such as the chemical compositions before and after mold fluxes were used，melting point，viscosity，heat transfer and so on were studied. The results showed that the SiO2 in mold fluxes was deoxidized by the Al in the molten steel，leading to changes of the mold fluxes composition during the continuous casting process，and properties of the lubrication and the heat transfer for mold fluxes also changed，which could increase slab surface cracks of high manganese steel 20Mn23AlV. Therefore，during CC production of the steel with strong reducibility element（Al），low SiO2 content mold fluxes should be used in order to reduce slab surface cracks，improve the surface quality of slab and ensure CC production of high manganese steel smoothly.

Received: 12 May 2017 Published: 07 September 2017

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	Articles by authors
	LI Jian-Min
	JIANG Mao-Fa
	DI Jun
	XUN Li-Feng

Cite this article:

LI Jian-Min,JIANG Mao-Fa,DI Jun等. Effect of mold fluxes on slab surface crack for 20Mn23AlV[J]. Iron and Steel, 2017, 52(9): 48-53.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20170233 OR http://www.chinamet.cn/Jweb_gt/EN/Y2017/V52/I9/48

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