| 振动CO2气体保护焊缝残余应力和接头显微组织分析 |
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| 引用本文： | 刘洪喜,张方,庞和,丁波.振动CO2气体保护焊缝残余应力和接头显微组织分析[J].振动与冲击,2011,30(1):183-187. |
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| 作者姓名： | 刘洪喜 张方 庞和 丁波 |
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| 作者单位： | 昆明理工大学材料科学与工程学院，云南 昆明 650093 |
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| 基金项目： | 国家自然科学基金资助项目，教育部博士点基金资助项目 |
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| 摘 要： | 采用振动CO2气体保护焊对轻型汽车驱动桥壳进行了焊接。对被焊接工件在常规CO2气体保护焊、常规CO2气体保护焊后振动时效处理及不同激振频率下振动CO2气体保护焊三种工艺进行了对比，并就不同条件下的焊缝残余应力、焊接接头显微组织作了分析。结果表明，采用适当振动参数, 在较大振幅时，振动CO2气保焊接能有效减小焊接变形，降低焊接残余应力，最大主动应力降低幅度达到41.74%。熔合区和过度区变窄，焊缝和热影响区晶粒明显细化，由柱状晶转变为等轴晶，魏氏组织减少甚至消失。
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| 关 键 词： | 振动时效 CO2焊接 残余应力 金相组织 |
| 收稿时间： | 2009-8-20 |
| 修稿时间： | 2009-11-2 |
Residual stress and microscopic structure in a welded seam using vibrating CO2 arc welding method |
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| LIU Hong-xi,ZHANG Fang,PANG He,DING Bo.Residual stress and microscopic structure in a welded seam using vibrating CO2 arc welding method[J].Journal of Vibration and Shock,2011,30(1):183-187. |
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| Authors: | LIU Hong-xi ZHANG Fang PANG He DING Bo |
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| Affiliation: | School of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093 |
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| Abstract: | To improve welding characteristics of CO_2 arc welding,sedan split case and sleeve of a car were welded with conventional CO_2 arc welding,conventional CO_2 are welding combined with vibration aging and vibrating CO_2 are welding processes.A welded seam residual stress and microscopic structure at various welding conditions were also investigated.The experimental results indicated that the vibrating CO_2 are welding can reduce welding deformation and residual stress in cases of proper vibration parameters,r... |
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| Keywords: | vibration aging CO arc welding residual stress microscopic structure |
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