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超声振动辅助E40钢水下湿法焊接组织与性能

王建峰1,2,孙清洁1,2,马江坤2,冯吉才1,2

王建峰1,2,孙清洁1,2,马江坤2,冯吉才1,2. 超声振动辅助E40钢水下湿法焊接组织与性能[J]. 焊接学报, 2018, 39(4): 1-5. DOI: 10.12073/j.hjxb.2018390084
引用本文: 王建峰1,2,孙清洁1,2,马江坤2,冯吉才1,2. 超声振动辅助E40钢水下湿法焊接组织与性能[J]. 焊接学报, 2018, 39(4): 1-5. DOI: 10.12073/j.hjxb.2018390084
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WANG Jianfeng1,2, SUN Qingjie1,2, MA Jiangkun2, FENG Jicai1,2. Microstructure and mechanical properties of underwater wet welded joint of E40 ship plate steel subjected to ultrasonic vibration[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(4): 1-5. DOI: 10.12073/j.hjxb.2018390084
Citation: WANG Jianfeng1,2, SUN Qingjie1,2, MA Jiangkun2, FENG Jicai1,2. Microstructure and mechanical properties of underwater wet welded joint of E40 ship plate steel subjected to ultrasonic vibration[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(4): 1-5. DOI: 10.12073/j.hjxb.2018390084
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超声振动辅助E40钢水下湿法焊接组织与性能

Microstructure and mechanical properties of underwater wet welded joint of E40 ship plate steel subjected to ultrasonic vibration

摘要

    摘要
  • 摘要: 文中针对常规水下湿法焊接过程中焊缝力学性能低的问题，设计了超声振动辅助水下湿法焊接的方法. 通过超声辐射端将超声振动能量施加在电弧前方的待焊区域，进而通过工件将超声能量传递到熔池中，对比研究了超声振动对焊缝成形、微观组织及力学性能的影响. 结果表明，超声振动能够减小焊缝截面不对称，增加焊缝深宽比，使熔池发生强烈的搅拌作用，具有细化晶粒的作用，并降低熔合区处柱状结晶的倾向. 与常规水下湿法焊接相比，超声振动辅助水下湿法焊接抗拉强度明显提高，达到母材的92.4%；焊缝区显微硬度升高，热影响区硬度值变化较小.
    Abstract: To improve the lower mechanical property in E40 steel joints obtained by conventional underwater wet welding, this article presents a novel underwater wet welding method through applying ultrasonic vibration to the work piece in front of the welding pool. The effect of ultrasonic vibration on the weld formation, microstructure and mechanical properties of underwater wet welded joint are investigated experimentally. The experimental results are compared with those by conventional underwater wet welding under the same welding conditions. The results show that ultrasonic vibration could reduce the asymmetry of weld cross-section, and enlarge the weld depth-to-width ratio. In addition, the grain refinement induced by ultrasonic vibration is usually related to the large instantaneous pressure and temperature fluctuations generated in the weld pool, which can increase the probability of nucleation and dendrite fragmentation, leading to grain refining in the weld metal during solidification, and lower tendency of column crystallization. Compared with conventional underwater wet welding, the tensile strength obtained by ultrasonic vibration assisted underwater wet welding is improved to some extent due to the introduced ultrasonic vibration, about 92.4% of the base metal. In addition, the microhardness in the weld zone is increased, while that in the heat affected zone has no obvious change. Therefore, it is supposed to be a good way to improve weld properties for underwater wet welding.
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  • [1] 林尚扬， 宋宝天， 宋天虎. 水下局部排水CO2半自动焊接技术的研究和应用[J]. 焊接学报， 1981， 2(1)： 9-19.Lin Shangyang， Song Baotian， Song Tianhu. A study and application of local dry CO2 gas shielded semi-automatic underwater welding[J]. Transactions of the China Welding Institution， 1981， 2(1)： 9-19.[2] 胡家琨， 武传松， 贾传宝. 水下湿法焊条电弧焊接过程稳定性评价[J]. 焊接学报， 2013， 34(5)： 99-102.Hu Jiakun， Wu Chuansong， Jia Chuanbao. Welding process stability evaluation of underwater wet manual metal arc welding[J]. Transactions of the China Welding Institution， 2013， 34(5)： 99-102.[3] Guo N， Fu Y， Feng J， et al. Classification of metal transfer mode in underwater wet welding[J]. Welding Journal， 2016， 95(4)： 133-140.[4] Jia C， Zhang T， Maksimov S Y， et al. Spectroscopic analysis of the arc plasma of underwater wet flux-cored arc welding[J]. Journal of Materials Processing Technology， 2013， 213(8)： 1370-1377.[5] 程方杰， 胡生辉， 高文斌， 等. 水下焊条电弧焊扩散氢含量及焊缝组织特征分析[J]. 焊接学报， 2014， 35(9)： 45-48.Cheng Fangjie， Hu Shenghui， Gao Wenbin， et al. Diffusible hydrogen content and microstructure characteristic in the joint by underwater shielded metal arc welding[J]. Transactions of the China Welding Institution， 2014， 35(9)： 45-48.[6] Zhang H T， Dai X Y， Feng J C， et al. Preliminary investigation on real-time induction heating-assisted underwater wet welding[J]. Welding Journal， 2015， 94(1)： 8-15.[7] Gao W， Wang D， Cheng F， et al. Enhancement of the fatigue strength of underwater wet welds by grinding and ultrasonic impact treatment[J]. Journal of Materials Processing Technology， 2015， 223： 305-312.[8] 闫久春， 杨春利， 刘会杰， 等. 超声复合焊接研究现状及科学问题[J]. 机械工程学报， 2015， 51(24)： 41-49.Yan Jiuchun， Yang Chunli， Liu Huijie， et al. Overview on ultrasonic-assisted welding and its scientific issues[J]. Journal of Mechanical Engineering， 2015， 51(24)： 41-49.[9] Da Cunha T V， Bohorquez C E N. Ultrasound in arc welding： A review[J]. Ultrasonics， 2015， 56： 201-209.
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  • 收稿日期:  2016-10-09

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