Materials Reports  2021, Vol. 35 Issue (z2): 325-328 |
| METALS AND METAL MATRIX COMPOSITES |
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| Influence of Welding Sequence on Welding Residual Stress of Tubular Large Thickness V-joint |
| LI Gang1, LI Zhongshuang1, FU Wei1, TAN Junzhe1, YANG Kang2
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1 Shenyang Blower Group Nuclear Power Pump Co., Ltd., Shenyang 110142, China
2 Liaoning Key Laboratory of General Aviation, Shenyang Aerospace University, Shenyang 110136, China |
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Abstract In large-scale industrial structure, the application of heavy thickness steel is more and more extensive. Because of the complexity of the structure, it is inevitable that there will be fusion welding connection between components. For the heavy thickness structure, multi-layer multi pass welding is usually used, and the welding process selection of multi-layer multi pass welding is unreasonable or the welding sequence selection of multi weld is not right, which will result in the local residual area of the welding structure. Too much stress or welding residual deformation will affect the service time of the structure. In order to obtain the optimal welding process and the distribution of residual stress, the nonlinear finite element software Marc was used to analyze the influence of welding residual stress field of tubular thick V-joint from the point of the welding sequence of the multi-layer welding and verified by the actual test results. The results show that in the process of multi-layer welding, symmetrical welding method is used to obtain the welding residual stress field and the residual stress of the inner weld is greater than that of the outer weld.
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Published: 09 December 2021
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| Fund:This work were financially supported by the Project of Liaoning Provincial Department of Education (JYT2020141) and the Key Research and Service Local Project of Liaoning Provincial Department of Education (JYT2020156). |
About author:: Gang Li, senior engineer of Shenyang Blower Group Co.,Ltd., published one paper as the first author in domestic journals, authorized three national invention patents and one utility model patent. His research work mainly focused on the welding related problems of pump equipment materials, and presided over the localization Welding Research of "Hualong No.1" shaft seal main pump of the Ministry of science and technology, participated in the development of main pump for cap1400 canned motor, the development of main pump for cap1000 canned motor and the localization development of main pump for AP1000 canned motor, etc.
Kang Yang is an engineer of Liaoning General Aviation Research Institute. More than 10 papers have been published by the first or correspondent authors in academic journals at home and abroad. One national invention patent and three utility model patents have been autho-rized. The research work mainly focuses on the application of mechanical analysis and testing of composite materials, presides over the project of Liaoning Provincial Department of Education, Shenyang Liming Aeroengine Co., Ltd. of China Airlines, and participates in the projects of National Natural Science Foundation, National Defense 863 sub-projects, Liaoning Provincial Department of Education, etc. |
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