双辊铸轧Al-10Mg铝合金凝固组织的模拟及实验对比研究  

Simulation and Experimental Comparison of Double-Roll Cast-Rolled Al-10Mg Aluminum Alloy Solidification Microstructure

作　　者：马腾 郝维新[2] 孙晓思 宁亚楠[4] MA Teng;HAO Weixin;SUN Xiaosi;NING Ya'nan(School of Mathematics,Jinzhong University,Jinzhong 030619,China;School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Department of Metallurgical and Environmental Engineering,Shanxi Engineering Vocational College,Taiyuan 030009,China;School of Mathematical Sciences,Shanxi University,Taiyuan 030006,China)

机构地区：[1]晋中学院数学系,山西晋中030619 [2]太原科技大学材料科学与工程学院,山西太原030024 [3]山西工程职业学院冶金与环境工程系,山西太原030009 [4]山西大学数学科学学院,山西太原030006

出　　处：《热加工工艺》2022年第3期78-82,77,共6页Hot Working Technology

基　　金：山西省高等学校科技创新项目(2020L0594,2019 L0996,2020L0575);晋中学院博士基金启动项目(2019021,2019039);山西工程职业学院重点科研课题(KYF-201901);晋中市科技重点研发项目(Y201027)。

摘　　要：基于金属凝固基本方程和元胞自动机方法的基本原理,建立了双辊铸轧宏观-微观耦合数学模型,对铸轧辊咬入点之前的Al-10Mg铝合金连续凝固过程进行数值模拟,得到了铸轧过程中Al-10Mg铝合金的凝固组织形貌、一次枝晶半径、二次枝晶间距,并预测了所制楔形带坯的力学性能。为了验证模拟结果的可靠性,对铸态试样进行金相检测及拉伸测试。结果表明:模拟得到的凝固组织晶粒大小、各晶区的分布特征、枝晶间距以及铸轧带坯屈服强度与实验结果基本一致。Based on the basic equation of metal solidification and cellular automata method, the coupled macro-micro mathematical model of twin-roll casting was set up. The continuous solidification process of Al-10Mg aluminum alloy before the niping point was numerically simulated, and the solidification microstructure, the dendritic grain radius, the dentritic secondary arm spacing were obtained, and the mechanical properties of wedge-strip billet were also predicted. In order to verify the reliability of the simulation results, the metallographic examination and the tensile tests of cast test samples were done. The results show that the gain size, the distribution characteristic of each crystal region, dendrite arm spacing and the yield strengths of cast rolled strip obtained from simulation basically agree with the experimental results.

关 键 词：双辊铸轧 元胞自动机 凝固微观组织 力学性能 实验验证 

分 类 号：TG244.3[金属学及工艺—铸造] TG249.7