| 小孔等离子弧焊接热场瞬时演变过程的数值分析 |
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| 引用本文： | 武传松,王怀刚,张明贤.小孔等离子弧焊接热场瞬时演变过程的数值分析[J].金属学报,2006,42(3):311-316. |
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| 作者姓名： | 武传松 王怀刚 张明贤 |
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| 作者单位： | 山东大学材料液态结构及其遗传性教育部重点实验室,济南,250061 |
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| 基金项目： | 重庆市应用基础研究基金 |
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| 摘 要： | 根据小孔等离子弧焊接的工艺特点,考虑等离子弧对熔池的“挖掘”作用,提出了一种新的焊接热源模型（TPAW）,以描述和反映等离子弧作用下“倒喇叭”状焊缝横断面的特点以及等离子弧热流沿工件厚度方向的分布．在此基础上,对小孔等离子弧焊接热场进行了有限元计算,分析了引弧后熔池及周围温度场的瞬时演变过程．计算出的小孔等离子弧焊缝形状与实验结果基本吻合,达到准稳态的时间与实验测试值一致．
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| 关 键 词： | 小孔等离子弧焊接 热源模型 热场 有限元分析 |
| 文章编号： | 0412-1961（2006）03-0311-06 |
| 收稿时间： | 2005-06-27 |
| 修稿时间： | 2005-06-272005-09-22 |
NUMERICAL ANALYSIS OF TRANSIENT DEVELOPMENT OF TEMPERATURE FIELD IN KEYHOLE PLASMA ARC WELDING |
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| WU Chuansong,WANG Huaigang,ZHANG Mingxian.NUMERICAL ANALYSIS OF TRANSIENT DEVELOPMENT OF TEMPERATURE FIELD IN KEYHOLE PLASMA ARC WELDING[J].Acta Metallurgica Sinica,2006,42(3):311-316. |
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| Authors: | WU Chuansong WANG Huaigang ZHANG Mingxian |
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| Affiliation: | Key Laboratory for Liquid Structure and Heredity of Materials, Ministry of Education, Shandong University, Jinan 250061;0531 |
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| Abstract: | With considering the characteristics of keyhole plasma arc welding and the plasma's " digging " action to the weld pool, a new welding heat source model (transient thermal model for plasma arc welding, TPAW) is proposed to describe and reflect the " reversed bugle " configuration of weld cross section under plasma's action and the heat intensity distribution along the workpiece thickness direction. Based on TPAW, finite element calculation of temperature field in keyhole plasma arc welding is conducted, and the transient development of weld pool and surrounding thermal profiles are analyzed. The predicted weld geometry and the time needed to reach the quasi-steady state are in agreement with the experimental measurements. |
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| Keywords: | keyhole plasma arc welding (K-PAW) heat source model temperature field finite element analysis |
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