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| 带压开孔结构多道间断焊的数值模拟 |
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薛小龙1, 桑芝富1, 姜卫忠2
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1.南京工业大学机械与动力工程学院, 江苏 南京 210009;2.扬子石化检修安装有限责任公司, 江苏 南京 210048
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| 摘要: |
| 对带压开孔用正交接管间断焊结构的温度场和应力场进行了数值模拟,并将之与连续焊时的结果进行比较。结果表明,采用间断焊可以有效降低焊接时的局部高温,而且其残余应力也略低于连续焊。对间断焊焊接接头的金相分析表明其金相组织正常,内压试验结果表明该结构能安全运行。 |
| 关键词: 间断焊 温度场 应力场 数值模拟 金相分析 |
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| 基金项目:中石化总公司基金资助项目(304001) |
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| Numerical simulation on discontinuous welding of a hot tap structure |
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XUE Xiao-long1, SANG Zhi-fu1, JIANG Wei-zhong2
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1.College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China;2.Yangzi Petrochemical Maintenance and Installation Co. Ltd., Nanjing 210048, China
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| Abstract: |
| The temperature field and residual stress distribution of discontinuous welding on an orthogonal nozzle were simulated and comparied with the results of continuous welding.It can be concluded that the local high temperature can be reduced effectively using the technique of discontinuous welding and smaller residual stresses are obtained.The metallographic analysis shows that the metallurgical structure is proper.The results of internal pressure test indicate that the hot tap structure can work safely. |
| Key words: discontinuous welding temperature fields stress fields numerical simulation metallographic analysis |
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