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| A-TIG焊接熔深增加机理 | |
| 引用本文： | 魏艳红,徐艳利,孙燕洁,董志波,杨春利.A-TIG焊接熔深增加机理[J].焊接学报,2009,30(2):37-40. |
| 作者姓名： | 魏艳红 徐艳利 孙燕洁 董志波 杨春利 |
| 作者单位： | 1. 南京航空航天大学,材料科学与技术学院,南京,210016;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. 航天二院,总装调部,北京,100854;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 3. 航天二院总装调部,北京,100854 4. 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 |
| 摘 要： | 活性化氩弧焊(A-TIG)焊接方法与传统TIG焊相比,具有明显的熔深增加作用.模拟了Nimonic 263 A-TIG焊接流场温度场,并对试验与模拟焊缝形状进行了对比.结果表明,同一焊接电流下,与TIG焊缝相比,A-TIG焊缝的熔深较深而熔宽较小.随着焊接电流的增加或者焊接速度的降低,A-TIG焊缝熔深呈线性增加,且比TIG焊的熔深增加效果明显.通过分析流体流动方式,进一步推测了A-TIG熔深增加机理:熔池内液体流动方式是熔深增加的主要原因,熔池中心处液体的流速明显高于熔池边缘,中心由外向内的环流为熔池内液体流动的主导方向.这个方向的环流将高温液体带到熔池底部,使熔池底部的熔化速度较熔池边缘有了明显的增加,且随着焊接电流的增加,熔深增加效果也不断提高. |
| 关 键 词： | 活性化氩弧焊 镍基合金263 熔深增加 流场 温度场 |
| 收稿时间： | 2008/9/16 0:00:00 |
Mechanism of increasing welding penetration with A-TIG welding |
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| WEI Yanhong,XU Yanli,SUN Yanjie,DONG Zhibo and YANG Chunli.Mechanism of increasing welding penetration with A-TIG welding[J].Transactions of The China Welding Institution,2009,30(2):37-40. | |
| Authors: | WEI Yanhong XU Yanli SUN Yanjie DONG Zhibo and YANG Chunli |
| Affiliation: | 1.School of Material Science and Technology;Nanjing University of Aeronautics & Astronautics;Nanjing 210016;China;2.The Second Academy of China Aerospace Science and Industry Corp;283 Factory;Beijing 100854;3.State Key Laboratory of Advanced Welding Production Technology;Harbin Institute of Technology University;Harbin 150001;China |
| Abstract: | A-TIG welding has obvious function of increasing welding penetration compared with conventional TIG welding.In this paper,welding flow field and temperature field of nimonic 263 with TIG and A-TIG were simulated and the simulated weld shape and penastration were compared with the experimental results.It is found that the depth of welded molten pool of A-TIG is deeper than that of TIG welding and its width is smaller when the welding current is the same.Moreover,with increasing welding current or decreasing ... |
| Keywords: | A-TIG welding nimonic 263 welding penetration increase welding flow field temperature field |
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