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| AZ61镁合金真空电子束焊接温度场数值模拟 |
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罗怡1,2,3, 刘金合1, 叶宏3, 闫忠琳3, 申彬3
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1.西北工业大学, 材料学院, 西安 710072;2.江苏科技大学, 先进焊接技术省级重点实验室, 江苏 镇江 212003;3.重庆工学院, 材料科学与工程学院, 重庆 400050
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| 摘要: |
| 对板厚10 mm AZ61镁合金板材进行了真空电子束焊接数值模拟研究.利用有限元模型以及三维移动双椭球热源模型,采用数值模拟的方法研究了电子束流与焊接过程温度场及焊缝熔深之间的关系.结果表明,建立的模型能够获得电子束深熔型焊接的效果,模拟焊缝成形及焊缝区、热影响区温度场分布与试验焊缝成形及实际电子束焊接特点较为一致,这也证明了该模型在AZ61镁合金电子束平板对焊有限元模拟中有较好的适用性。 |
| 关键词: 镁合金 电子束焊接 温度场 数值模拟 |
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| 基金项目:重庆市自然科学基金资助项目(2006BB4391);江苏科技大学先进焊接技术省级重点实验室开放研究基金资助项目 |
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| Numerical simulation on temperature field of electron beam welding of AZ61 magnesium alloy |
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LUO Yi,LIU Jinhe,YE Hong,YAN Zhonglin,SHEN Bin
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1.School of Material Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China;2.School of Material Science and Engineering, Chongqing Institute of Technology, Chongqing 400050, China
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| Abstract: |
| The numerical simulation of vacuum electron beam welding for AZ61 magnesium alloy sheet with 10 mm thickness was studied.By using the finite element model and the 3D moving double ellipsoid heat source model, numerical simulation method was employed to study the influence of the electron beam current on the temperature field of welding process and weld penetration.The results of simulation and experiment show that the effect of deep penetration of electron beam welding can be accessed by the model rebuild.The simulation result of the weld forming and the temperature distributions of weld zone and heat affect zone is more consistent to the experiment result.It also proves that the model is applicable to the finite element simulation on the electron beam welding of AZ61 magnesium alloy sheet. |
| Key words: magnesium alloy electron beam welding temperature field numerical simulation |
