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2219铝合金电子束堆焊凝固缺陷的模拟预测

刘成财, 周阿芳, 何景山

刘成财, 周阿芳, 何景山. 2219铝合金电子束堆焊凝固缺陷的模拟预测[J]. 焊接学报, 2016, 37(3): 75-78.
引用本文: 刘成财, 周阿芳, 何景山. 2219铝合金电子束堆焊凝固缺陷的模拟预测[J]. 焊接学报, 2016, 37(3): 75-78.
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LIU Chengcai, ZHOU Afang, HE Jingshan. Prediction of shrinkage defects in 2219 Al alloy electron beam overlaying welds[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(3): 75-78.
Citation: LIU Chengcai, ZHOU Afang, HE Jingshan. Prediction of shrinkage defects in 2219 Al alloy electron beam overlaying welds[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(3): 75-78.
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2219铝合金电子束堆焊凝固缺陷的模拟预测

  • 哈尔滨工业大学先进焊接与连接国家重点实验室, 哈尔滨 150001

Prediction of shrinkage defects in 2219 Al alloy electron beam overlaying welds

  • State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

摘要

    摘要
  • 摘要: 铝合金电子束堆焊焊缝根部缩孔是一种特种焊接缺陷,它会导致应力集中诱发裂纹产生,显著降低焊件承载能力,必须给予足够重视.文中主要借助于ANSYS有限元软件的APDL二次开发编程语言,将匙孔模式焊接热源模型与枝晶间渗流理论和Niyama判据相结合,提出了一套基于温度场的凝固收缩判据程序,并应用它成功模拟预测了非熔透2219铝合金电子束堆焊件的根部缩孔缺陷.结果表明,通过模拟手段得到的缩孔缺陷沿焊缝熔深方向误差为8.76%,沿焊缝熔宽方向误差为13.28%,与试验对比件基本吻合,验证了缺陷判据程序的正确性和实用性.
    Abstract: Root shrinkage cavity in Al alloy electron beam welds is one special kind of welding defect, which results in stress concentration, induces the occurrence of crack and remarkablely decreases the carrying capacity, so it must be paid great attention. With the help of ANSYS APDL, by combining keyhole mode welding heat source model and interdendriticflowing theory as well as Niyama criterion, a set of defect criterion program based on temperature field was proposed to predict the root shrinkage cavity in 2219 Al alloy non-penetration electron beam overlaying weld. The results indicated that the simulated welding penetration has an error of 8.76%, the erros of simulated welding width is 13.28%, which werebasically in accordance with experimental samples. These results validated the exactness and feasibility of the defect criterion program developed in this paper.
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    • 参考文献(6)
  • [1] 冉国伟, 宋永伦, 闫思博, 等. 2219铝合金复合热源焊接工艺及接头性能[J]. 焊接学报, 2011, 32(9):25-29. Ran Guowei, Song Yonglun, Yan Sibo, et al. Welding process and joint properties of hybrid welding on 2219 aluminum alloy[J]. Transactions of the China Welding Institution, 2011, 32(9):25-29.
    [2] 汪兴均, 黄文荣, 魏齐龙, 等. 电子束焊接5A06铝合金接头Mg元素蒸发烧损行为分析[J]. 焊接学报, 2006, 27(11):61-64. Wang Xingjun, Huang Wenrong, Wei Qilong, et al. Evaporation loss of Mg element in 5A06 aluminum alloy electron beam welding[J]. Transactions of the China Welding Institution, 2006, 27(11):61-64.
    [3] 翟熙伟, 陈芙蓉, 毕良艳, 等. 7A52铝合金电子束焊接参数及性能[J]. 焊接学报, 2012, 33(8):73-76. Zhai Xiwei, Chen Furong, Bi Liangyan, et al. Welding parameters and mechanical properties of electron beam welding of 7A52 aluminum alloy[J]. Transactions of the China Welding Institution, 2012, 33(8):73-76.
    [4] Niyama E, Uchida T, Morikawa M. A method of shrinkage prediction and its application to steel casting practice[J]. International Journal of Cast Metals Research, 1982, 7:52-63.
    [5] 李文珍. 铸件凝固过程微观组织及缩孔缩松形成的数值模拟研究[D]. 北京:清华大学, 1995.
    [6] 张承甫, 肖理明, 刘瑞祥, 等. 二元合金单向凝固从胞状晶向树枝晶过渡的判据[J]. 金属学报, 1986, 22(4):194-195. Zhang Chengfu, Xiao Liming, Liu Ruixiang, et al. A criterion of cell-dendrite transition in unidirectional solidification of binary alloys[J]. Acta Metallurgica Sinica, 1986, 22(4):194-195.
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  • 收稿日期:  2014-06-05

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