| 等离子与钨极双面电弧焊接热过程的数值模拟 |
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| 引用本文： | 孙俊生,武传松. 等离子与钨极双面电弧焊接热过程的数值模拟[J]. 金属学报, 2003, 39(5): 499-504 |
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| 作者姓名： | 孙俊生 武传松 |
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| 作者单位： | 1. 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;哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨,150001
2. 哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨,150001 |
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| 基金项目： | 美国国家自然科学基金 DMI 9812981 |
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| 摘 要： | 利用由等离子电弧(PAw)与钨极电弧(TIG)构成的单电源双面电弧焊接(DsAw)工艺可以获得深宽比较大的焊缝，该工艺具有高效、低成本的特点，是一种先进焊接技术．本文综合考虑影响等离子弧小孔形成的等离子流力、重力、表面张力等力学因素，建立了小孔形成过程的数学模型，并以此为基础建立了DSAW电流密度分布和焊接传热的控制方程．采用数值模拟技术对上述方程进行耦合求解，定量分析了双面电弧焊接条件下的传热规律及热影响区性能，同时作为对比也模拟了PAW焊接的传热现象，揭示了DSAW大幅度增加熔深、改善热影响区性能的机理，为工艺参数优化设计提供了依据．
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| 关 键 词： | 双面电弧焊接，温度场，热影响区，数值模拟 |
| 文章编号： | 0412-1961(2003)05-0499-06 |
| 修稿时间： | 2002-07-12 |
NUMERIC SIMULATION OF HEAT TRANSFER PROCESS IN DOUBLE-SIDED ARC (PAW+TIG) WELDING |
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| SUN Junsheng,WU Chuansong)MOE Key Laboratory for Liquid Structure and Heredity of Materials,Shandong University,Jinan )National Key Laboratory of Advanced Welding Production Technology of Harbin Institute of Technology,Harbin. NUMERIC SIMULATION OF HEAT TRANSFER PROCESS IN DOUBLE-SIDED ARC (PAW+TIG) WELDING[J]. Acta Metallurgica Sinica, 2003, 39(5): 499-504 |
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| Authors: | SUN Junsheng WU Chuansong)MOE Key Laboratory for Liquid Structure Heredity of Materials Shandong University Jinan )National Key Laboratory of Advanced Welding Production Technology of Harbin Institute of Technology Harbin |
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| Affiliation: | SUN Junsheng,WU Chuansong1)MOE Key Laboratory for Liquid Structure and Heredity of Materials,Shandong University,Jinan 2500612)National Key Laboratory of Advanced Welding Production Technology of Harbin Institute of Technology,Harbin 150001 |
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| Abstract: | Comparatively deep and wide welds can be attained in double-sided arc welding (DSAW) with single power supply consisting of PAW (plasma-arc) and TIG (tungsten-arc). PAW+TIG double-sided arc welding is an advanced manufacturing technology with the performance of high efficiency and low cost. The mathematic models of keyhole formation are established after synthetically considering the dynamic factors, such as plasma arc pressure, gravity and surface tension etc., which affect the keyhole formation in plasma-arc welding. On the basis of those models, the cybernetic equations describing the current density distribution and heat transfer of DSAW are relatively established. Coupling consequences of those equations can be attained with the numeric simulation technology. Furthermore, rules of heat transfer and performance of HAZ in double-sided arc welding are quantitatively analyzed. Meanwhile, as a comparison, the phenomenon of heat transfer in PAW is also simulated. Consequently, the principles of greatly deepening weldpool and improving HAZ performance are disclosed and the bases for designing and optimizing the welding process parameters are provided. |
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| Keywords: | double-sided arc welding (DSAW) temperature field heat affect zone numeric simulation |
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