摘要
本文研究了Al-20Si-xCu系列合金的凝固过程和热裂行为。采用差热分析法(DTA)对凝固过程进行了分析,用自制的T形模具对其热裂行为进行了研究,并用Clyne和Davis模型对三元合金热裂敏感性进行了预测。结果表明:用裂纹敏感性系数(CSC)预测的合金热裂敏感性趋势与Al-20Si-xCu系列合金的实验结果一致,合金的热裂敏感性(Hot tearing sensitivity,HTS)大小顺序为Al-20Si-3Cu>Al-20Si-4Cu>Al-20Si-2Cu>Al-20Si-1Cu。同时,运用ProCAST模拟软件采用基于有限元(FEM)的数值计算和综合求解的方法,对合金铸件充型、凝固和冷却过程进行模拟,预测合金浇注过程产生的热裂应力以及热裂指标(HTI)等参数,其数值模拟结果与实验结果吻合较好。
The solidification process and hot tearing behavior of Al-20Si-xCu series alloys were investigated. The solidification process was analyzed by differential thermal analysis(DTA) and the hot tearing behavior was studied by self-made “T” mold, the Clyne and Davis models were used to predict the hot tearing sensitivity of ternary alloy. The results show that the hot tearing sensitivity predicted by the crack sensitivity coefficient(CSC)is consistent with the experimental results of Al-20Si-xCu series alloys. The hot tearing sensitivity(HTS) of the alloys is Al-20Si-3Cu>Al-20Si-4Cu>Al-20Si-2Cu>Al-20Si-1Cu. At the same time, ProCAST simulation software was used to simulate the filling, solidification and cooling processes of alloy castings by using the method of numerical calculation and comprehensive solution based on finite element method(FEM), and the hot tearing stress and hot tearing index(HTI) were predicted. The numerical simulation results were in good agreement with the experimental results.
作者
袁建伟
陈翌庆
余俊超
张凯旋
周锐
YUAN Jian-wei;CHEN Yi-qing;YU Jun-chao;ZHANG Kai-xuan;ZHOU Rui(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2022年第11期3294-3305,共12页
The Chinese Journal of Nonferrous Metals
基金
国家自然科学基金资助项目(52071123)。
关键词
铝硅合金
热裂敏感性
热分析
数值模拟
aluminum-silicon alloy
hot crack sensitivity
thermal analysis
the numerical simulation
