Effect of pouring and mold temperatures on fluidity and hot tearing behavior of cast Al-Li-Cu-Mg-Sc-Zr-Ti alloy  

浇注温度和模具温度对铸造Al-Li-Cu-Mg-Sc-Zr-Ti合金流动性和热裂行为的影响

作　　者：Yi-xiao WANG Guo-hua WU Liang ZHANG You-jie GUO Xin TONG Liang-bin LI Xun-man XIONG 王一笑;吴国华;张亮;郭幼节;童鑫;李良彬;熊训满(上海交通大学材料科学与工程学院轻合金精密成型国家工程研究中心和金属基复合材料国家重点实验室,上海200240;江西赣锋锂业有限公司,新余338004)

机构地区：[1]National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]Jiangxi Ganfeng Lithium Co.,Ltd.,Xinyu 338004,China

出　　处：《Transactions of Nonferrous Metals Society of China》2025年第3期669-683,共15页中国有色金属学报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51871148,51821001)。

摘　　要：The influence of pouring temperature and mold temperature on the fluidity and hot tearing behavior of Al-2Li-2Cu-0.5Mg-0.15Sc-0.1Zr-0.1Ti alloys was investigated by experimental investigation and simulation assessment.The results showed that the length of the spiral fluidity sample increases from 302 to 756 mm as the pouring temperature increases from 680 to 740℃,and from 293 to 736 mm as the mold temperature increases from 200 to 400℃.The hot tearing susceptibility(HTS)firstly decreases and then increases with increasing pouring and mold temperatures,which is mainly caused by the oxide inclusion originating from the high activity of Li at excessive pouring temperature.Excessive pouring and mold temperatures easily produce oxide inclusions and holes,leading to a reduction in fluidity and an increase in HTS of the alloy.Combining the experimental and simulation results,the optimized pouring and mold temperatures are~720℃ and~300℃ for the cast Al-Li alloy,respectively.通过实验与模拟方法研究了浇注温度和模具温度对Al-2Li-2Cu-0.5Mg-0.15Sc-0.1Zr-0.1Ti合金流动性和热裂行为的影响。结果表明,当浇注温度从680℃升高到740℃时,螺旋流动性试样的长度从302 mm增加到756 mm;当模具温度从200℃升到400℃时,螺旋流动性试样的长度从293 mm增加到736 mm。随着浇注温度和模具温度的升高,合金热裂敏感因子先降低后升高,主要是由于浇注温度过高容易产生含锂氧化物。过高的浇注温度和模具温度容易产生氧化物夹杂物和孔洞,导致合金的流动性降低,热裂敏感因子升高,综合实验和模拟结果分析可知,浇注温度和模具温度分别控制在~720℃和~300℃适合生产铸造铝锂合金产品。

关 键 词：pouring temperature mold temperature FLUIDITY hot tearing behavior cast Al−Li alloy numerical simulation 

分 类 号：TG1[金属学及工艺—金属学]