| 基于新型回火焊道的焊接残余应力评价 |
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| 引用本文： | 张亦良,石显,赵建平,赵石雷. 基于新型回火焊道的焊接残余应力评价[J]. 焊接学报, 2012, 33(7): 49-52 |
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| 作者姓名： | 张亦良 石显 赵建平 赵石雷 |
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| 作者单位： | 1. 北京工业大学机械工程与应用电子技术学院,北京,100124
2. 南京工业大学机械与动力工程学院,南京,210000 |
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| 摘 要： | 某扩建工程为降低III类容器改建中的焊接残余应力,尝试采用新型回火焊道工艺.针对焊接工艺优化与评价问题,采用Q345钢焊接试板,对3种工艺(普通焊接及2种新型回火焊接)、2种模式(平板及T形板)的6块试板(600 mm×300 mm×30 mm)应用X射线法进行全面的测试与评价.结果表明,采用回火焊接工艺的1号及3号T形板在焊缝处的应力比普通焊接工艺试件分别降低46%及36%,回火焊接工艺使纵向应力降低,横向应力成为第一主应力;A面的残余应力高于B面25%以上.实际工程中为降低残余应力可去除焊缝余高.
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| 关 键 词： | 回火焊道 X射线 残余应力 工艺评定 |
| 收稿时间： | 2011-04-25 |
Evaluation of weld-pass process on eliminating weld residual stress |
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| ZHANG Yiliang,SHI Xian,ZHAO Jianping and ZHAO Shilei. Evaluation of weld-pass process on eliminating weld residual stress[J]. Transactions of The China Welding Institution, 2012, 33(7): 49-52 |
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| Authors: | ZHANG Yiliang SHI Xian ZHAO Jianping ZHAO Shilei |
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| Affiliation: | College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China,College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China,College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 211816, China and College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China |
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| Abstract: | In order to reduce the welding residual stress, researchers adopted tempering weld-pass treatment for the improvement of the class III vessels in an expansion project.Due to the optimization and evaluation of welding process, the researchers conducted a comprehensive test and evaluation by X-ray method on six Q345 steel welding test plates(600 mm×300 mm×30 mm), with three kinds of processes(welding and two kinds of new tempering welding treatment) and 2 patterns(flat butt and T-joint welded plate) and considering the weld metal polished(side B) while the other side(side A) not.The results showed that the welding residual stress in 1 and 3 T-plate decreased by 46% and 36% respectively than which is not with tempering welding treatment.Tempering weld-pass treatment reduced the longitudinal stress(LS), and the transverse stress(TS) became the first principal stress.The residual stress of A-side was 25% higher than that of B-side.To reduce the residual stress, the weld metal can be removed in practical engineering applications. |
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| Keywords: | weld pass X-ray diffraction welding residual stress process evaluation |
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