Effect of CaO-SiO2 -Al2O3 Series Mold Flux Adding Li2O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV

李晓军; 李欢; 李振

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Effect of CaO-SiO2 -Al2O3 Series Mold Flux Adding Li2O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV

更新时间：2026-01-21

- Effect of CaO-SiO2 -Al2O3 Series Mold Flux Adding Li2O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV
- Special Steel Vol. 42, Issue 4, Pages: 39-41(2021)
- 作者机构：
  
  1. 山西太钢不锈钢股份有限公司1炼钢二厂
  2. 技术中心,太原,030003
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Received：03 December 2020，
  
  Online First：09 March 2022，
  
  Published：09 March 2021
- 稿件说明：
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李晓军, 李欢, 李振. Effect of CaO-SiO2 -Al2O3 Series Mold Flux Adding Li2O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV[J]. Special Steel, 2021, 42(4): 39-41.
DOI：

李晓军, 李欢, 李振. Effect of CaO-SiO2 -Al2O3 Series Mold Flux Adding Li2O on Cast Slab Surface Longitudinal Crack of High Aluminum Steel 20Mn23AlV[J]. Special Steel, 2021, 42(4): 39-41. DOI：

摘要

研究了 1.5%～2.5% Al的20Mn23AlV钢200 mm × 1260 mm铸坯表面纵裂纹产生机理。结果表明:20Mn23AlV表面纵裂纹与结晶器保护渣变性有关。保护渣渣中加入5.49%的Li

O大幅提高了该钢种浇注过程保护渣理化指标的稳定性

且有利于将该钢种连铸坯表面纵裂发生几率由23.8%降至0.3%以下。

Abstract

The mechanism of surface longitudinal cracks of 200 mm x 1 260 mm cast slab of 1.5% ~ 2.5% Al steel 20Mn23AlV has been studied. The results show that the surface longitudinal crack of steel 20Mn23AlV cast slab is related to the denaturation of mold flux. The mold flux added 5.49% Li

O can greatly improve the stability of the physical and chemical indexes of the mold flux during the casting process

and it is favourable to reduce the occurrence probability of cast slab longitudinal surface crack from 23.8% to below 0.3% .

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