提高亚包晶钢板坯拉速对结晶器传热的影响  

Influence of Increasing Casting Speed of Hypoperitectic Steel Slab on Heat Transfer of Mold

作　　者：赵紫锋[1] 张炯明[1] 王新华[1] 梅峰[2] 阮小明[2] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]宝山钢铁股份有限公司技术中心,上海201900

出　　处：《特殊钢》2009年第2期10-12,共3页Special Steel

基　　金：国家自然科学基金与宝钢联合资助项目(50774109)

摘　　要：通过对提高亚包晶钢AQ钢种230 mm×1200 mm板坯拉速试验过程中结晶器冷却水参数、铜板测温等数据进行适时记录,并与数学模型及ANSYS商业软件相结合,研究了提高拉速对结晶器平均热流、局部热流、铜板温度场以及坯壳厚度的影响。结果表明,拉速由1.3m/min提高到1.5m/min时,平均热流增加0.1 MW/m^2左右,宽边弯月面区域局部热流增加0.13 MW/m^2,但均在合理范围内,这与采用高碱度高结晶温度的试验保护渣有关;结晶器窄/宽面平均热流比超过0.9,应适当减少结晶器锥度;宽面坯壳厚度平均减薄4 mm左右,应严格控制结晶器传热强度,以保证连铸工艺稳定和铸坯质量。According to real-time data recording of cold water parameters for mold and temperature of copper plate measured by thermo-couple during test of increasing cast speed of hypoperitectic AQ steel grade 230 mm×1 200 mm slab, and combined with math model and ANSYS commercial software, the influence of increasing casting speed on mold average heat flux, local heat flux, temperature field of copper plate and thickness of strand shell has been studied. Results showed that with increasing casting speed from 1.3 m/min to 1.5 m/min, the average heat flux increased by about 0. 1 MW/m^2 , the local heat flux in broadside meniscus region increased by more than 0. 13 MW/m^2 which were all in reasonable range due to using test mold powder with high basicity and high crystallizing temperature; the average ratio of heat flux of mold narrow/broad-side was 0, 9 so the taper of copper plate should be reduced properly ; and the average thickness of broadside strand shell reduced by about 4 mm, therefore the intensity of heat transfer of mold must be controlled strictly to ensure casting process stability and slab quality.

关 键 词：AQ钢板坯 拉速 结晶器 传热 

分 类 号：TF777[冶金工程—钢铁冶金]