摘要
含铝TRIP钢钢液中Al易与结晶器保护渣中的SiO2发生氧化-还原反应,使其保护渣中Al2O3的质量分数由3%快速增加到30%左右,w(Al2O3)/w(SiO2)由0.10增加到1.44,导致黏度发生大的波动.研究了Al2O3含量和w(Al2O3)/w(SiO2)对含铝TRIP钢保护渣黏度的影响,建立了高Al2O3含量保护渣系黏度的计算模型.结果表明:随着Al2O3质量分数由3%增加到17%,综合碱度R<1的保护渣黏度先增大再减小,而R≥1的保护渣黏度变化较小;随着Al2O3质量分数由17%增加到30%,保护渣的黏度快速增大;随着w/w的增大,Al-TRIP钢保护渣的黏度呈现先快速减小而后迅速增大的趋势.
The oxidation-reduction reaction can easily happen between Al contained in liquid steel and SiO2 component in mold fluxes during continuous casting of TRIP steel containing Al.As a result,the Al2O3 component sharply increases from 3% to 30%,and the w（Al2O3）/w（SiO2） ratio simultaneously ascends from 0.10 to 1.44,so the viscosity could have a bigger fluctuation accordingly.The effects of Al2O3 content and w（Al2O3）/w（SiO2） ratio on the viscosity of mold slags were investigated for producing TRIP steel containing Al.A model was built to predict the viscosity of the high Al2O3 slag system.The results indicate that when the comprehensive basicity is less than 1,the viscosity of mold fluxes initially rises and then reduces again with increasing the Al2O3 content from 3% to 17%,but it changes slightly when the basicity is greater than 1.The viscosity of mold fluxes dramatically rises when the Al2O3 content changes from 17% to 30%.With increasing w（Al2O3）/w（SiO2） ratio,the viscosity of mold fluxes for TRIP steel containing Al initially reduces and then abruptly rises.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
2010年第6期725-729,共5页
Journal of University of Science and Technology Beijing
基金
教育部留学回国人员科研启动基金资助项目(No.(2008)890-7)
