中南大学学报（自然科学版）Issue(5)：1602-1608,7.DOI:10.11817/j.issn.1672-7207.2015.05.005
铸嘴结构对3004铝合金铸轧流热场的影响及其优化设计
Effect of nozzle structure on fluid-thermal field of 3004 aluminum alloy melt in cast-rolling and its optimum design
摘要
Abstract
In view of the inferior liquidity of 3004 aluminum alloy melt in cast-rolling, difficult to distribute in feed tip nozzle and easy to cause defect of sheet, viscosity of 3004 aluminum alloy melt was measured by viscometer for high temperature melt, fluid-thermal field of melt in nozzle cavity was analyzed by finite element simulation analysis software (COMSOL Multiphysics) based on the actual physical parameters and production condition, and nozzle structure was optimized according to the simulation results and it was verified by experiment. The results show that the relationship between viscosityμand temperatureθfrom 660℃ to 750℃ can be expressed asμ=10−3×exp(0.059+621.379/θ). The vortex emerges in nozzle cavity and fluid-thermal field distributes unevenly at the output of nozzle when the angle is 8° between block and horizontal direction and the gap is 30 mm between block and spacers. While melts flow smoothly and fluid-thermal field is relatively uniform when the block is horizontal and the gap is 50 mm. The experiments show that the optimum proposal is feasible and the simulation results are accurate.关键词
3004铝合金/黏度/铸嘴/有限元模拟/流热场Key words
3004 aluminum alloy/viscidity/nozzle/finite element simulation/fluid-thermal field分类
矿业与冶金引用本文复制引用
戴青松,邓运来,胥福顺,张新明..铸嘴结构对3004铝合金铸轧流热场的影响及其优化设计[J].中南大学学报（自然科学版）,2015,(5):1602-1608,7.基金项目
国家重点基础研究发展计划(973计划)项目(2010CB721700，2012CB619500)@@@@(Projects(2010CB721700,2012CB619500) supported by Major State Basic Research Development Program of China) （973计划）
