| 交流TIG电弧粉末堆焊层成形特点的研究 |
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| 引用本文： | 单际国,谭稳达,任家烈. 交流TIG电弧粉末堆焊层成形特点的研究[J]. 电焊机, 2005, 35(11): 27-29 |
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| 作者姓名： | 单际国 谭稳达 任家烈 |
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| 作者单位： | 1. 清华大学,机械工程系,北京,100084;清华大学,先进成形制造重点实验室,北京,100084
2. 清华大学,机械工程系,北京,100084 |
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| 摘 要： | 为了降低TIG电孤堆焊时因直流正接造成堆焊金属稀释率过大的问题，尝试使用交流TIG电弧进行粉末堆焊，研究了堆焊层的成形特点。实验表明，与直流正接相比．使用相同电流值的交流TIG电弧进行粉末堆焊，获得的堆焊层熔宽更大．熔深和母材熔化量更小．因而具有更小的深宽比和稀释率。这一规律不随堆焊电流的大小和堆焊材料的不同而发生变化．
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| 关 键 词： | 交流TIG电弧 粉末堆焊 堆焊层形状参数 稀释率 |
| 收稿时间： | 2005-10-30 |
| 修稿时间： | 2004-08-02 |
Formation characteristics of AC TIG arc powder surfacing layer |
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| SHAN Ji-guo,TAN Wen-da,REN Jia-lie. Formation characteristics of AC TIG arc powder surfacing layer[J]. Electric Welding Machine, 2005, 35(11): 27-29 |
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| Authors: | SHAN Ji-guo TAN Wen-da REN Jia-lie |
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| Affiliation: | 1.Department of Mechanical Engineering,Tsinghua University, Beijing 100084 China; 2.Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Tsinghua University, Beijing 100084, China |
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| Abstract: | The commonly used direct current(DC) straight polarity of TIG arc causes large dilution of surfacing metal in surfacing process,so TIG arc of alternative current polarity is introduced and the shape parameters of the surfacing laye rs are studied.The results show that the AC-arc-prepared layers have larger weld widths,smaller weld depths and melting amounts of base metal,therefore lower aspect ratios and dilutions are observed than in the case of layers prepared by DC straight arc with the same current.This result is sustainable no matter how high the current is and what powder is preplaced. |
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| Keywords: | AC TIG are powder surfacing shape parameter of surfacing layer dilution |
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