| 1561铝合金TIG深熔焊接头组织与力学性能 |
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| 引用本文： | 闫德俊,韩端锋,王毅,罗玖强,刘晓莉,杨侦,梁志敏.1561铝合金TIG深熔焊接头组织与力学性能[J].焊接学报,2016,37(12):29-32. |
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| 作者姓名： | 闫德俊 韩端锋 王毅 罗玖强 刘晓莉 杨侦 梁志敏 |
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| 作者单位： | 1.哈尔滨工程大学 船舶工程学院, 哈尔滨 150001;中船黄埔文冲船舶有限公司, 广州 510336 |
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| 基金项目： | 中国博士后科学基金资项目(2016M590821)；国家国际科技合作资助项目(2013DFR7016)；国防基础科研计划资助(A0720133002)；黄埔区重大专项资助项目(201518) |
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| 摘 要： | 采用TIG深熔焊工艺，对1561高镁铝合金进行了焊接，并对接头的显微组织和力学性能进行系统分析.结果表明焊缝中无气孔和裂纹缺陷；打底焊道中部存在“∧”字形粗晶区，其上下部晶粒尺寸细小；双层焊经历第二道的盖面焊后，打底焊道晶粒明显长大，熔合区晶粒晶界发生重熔，焊缝软化现象仍有发生；焊缝和热影响区的显微硬度低于母材，但热影响区并没有表现出明显的软化现象.接头抗拉强度可达314 MPa，表明深熔焊工艺适合于1561高镁铝合金的焊接.
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| 关 键 词： | 焊接接头 深熔焊 显微组织 组织非均匀性 |
| 收稿时间： | 2015/10/15 0:00:00 |
Deep-penetration TIG welding of 1561 aluminum alloy |
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| YAN Dejun,HAN Duanfeng,WANG Yi,LUO Jiuqiang,LIU Xiaoli,YANG Zhen and LIANG Zhimin.Deep-penetration TIG welding of 1561 aluminum alloy[J].Transactions of The China Welding Institution,2016,37(12):29-32. |
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| Authors: | YAN Dejun HAN Duanfeng WANG Yi LUO Jiuqiang LIU Xiaoli YANG Zhen and LIANG Zhimin |
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| Affiliation: | 1.Department of Naval Architecture, Harbin Engineering University, Harbin 150001, China;CSSC Huangpu Wenchong Shipbuilding Company Limited, Guangzhou 510336, China2.Department of Naval Architecture, Harbin Engineering University, Harbin 150001, China3.CSSC Huangpu Wenchong Shipbuilding Company Limited, Guangzhou 510336, China4.School of Materials Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China |
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| Abstract: | Deep-penetration TIG welding of 1561 aluminum alloy was conducted, and the microstructure and mechanical properties of the joints were analyzed systematically. The results show that the pores and cracks are not found in welds. The coarse grain zone with shape of "∧" is observed in the weld cross section of 1561 aluminum alloy. There are fine grain zones on the top and bottom zones of the coarse grain zone. After the cosmetic welding, the grains of backing weld grow up obviously, the remelting occurs in the grain boundaries of the fusion zone, and the softening phenomena still occurs in the joint. The microhardness of weld and heat affected zone is lower than that of the base metal, but there is no obvious softening phenomenon in the heat affected zone. Moreover, the tensile strength of the joints was about 314 MPa, which shows that the deep-penetration welding is suitable for the 1561 aluminum alloy with high magnesium. |
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| Keywords: | welded joint deep-penetration welding microstructure tissue heterogeneity |
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