20Mn23AlV钢用低反应性连铸保护渣的开发

20Mn23AlV高锰无磁钢的高铝含量导致连铸过程中钢水与连铸保护渣的剧烈反应,连铸坯产生大量裂纹缺陷,影响其连铸正常生产。为提高铸坯质量,保证20Mn23AlV高锰钢连铸生产顺行,本研究对现场生产20Mn23AlV的连铸工艺和采用的连铸保护渣进行了系统的研究和分析。通过实验室的感应加热炉进行渣-金反应试验,并结合化学分析和扫描电镜等方法研究开发出20Mn23AlV低反应性连铸保护渣,并采用工业试验证明采用低反应性连铸保护渣可以消除连铸坯表面裂纹缺陷,20Mn23AlV高锰钢铸坯修磨量可由8%降低至1%。

Development of low responsiveness mold fluxes for 20Mn23AlV

The 20Mn23AlV steel is a type of high manganese and low magnetism steel with high Al content, which causes the violent slag- steel reaction during the continuous casting (CC) process and the formation of the serious surface crack of 20Mn23AlV slab, and influences the regular continuous casting production. In order to improve the surface quality of slab and keep the smooth continuous casting production of 20Mn23AlV steel, the continuous casting process technology and mold fluxes for 20Mn23AlV steel were studied and analyzed. By the slag- steel reaction experiment in the induction heating furnace, combined with the chemical analysis and the scanning electron microscope(SEM), the low responsiveness mold fluxes for 20Mn23AlV steel were developed. The industry experiments of the low responsiveness continuous casting mold fluxes showed that the slab surface crack was eliminated, and the slab grinding rate was reduced from 8% to 1%.