[1]薛彩军,许江波,梁珩,等.2219铝合金焊缝组织及其对力学性能的影响[J].南京理工大学学报(自然科学版),2013,37(01):145.
 Xue Caijun,Xu Jiangbo,Liang Heng,et al.Microstructure and effects of mechanical properties of 2219 aluminum alloy welded joint[J].Journal of Nanjing University of Science and Technology,2013,37(01):145.
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2219铝合金焊缝组织及其对力学性能的影响
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
37卷
期数:
2013年01期
页码:
145
栏目:
出版日期:
2013-02-28

文章信息/Info

Title:
Microstructure and effects of mechanical properties of 2219 aluminum alloy welded joint
作者:
薛彩军许江波梁珩张俊苗林鸿志
南京航空航天大学 机械结构力学及控制国家重点实验室,江苏 南京 210016
Author(s):
Xue CaijunXu JiangboLiang HengZhang JunmiaoLin Hongzhi
State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China
关键词:
2219铝合金焊接接头微观组织力学性能惰性气体钨极保护焊
Keywords:
2219 aluminum alloywelding jointsmicrostructuresmechanism propertiestungsten inert gas arc welding
分类号:
TG047
摘要:
针对厚度为4 mm的2219-T87铝合金进行惰性气体钨极保护焊(Tungsten inert gas arc welding,TIGAW)试验研究,分析焊缝的组织结构及力学性能。拉伸试验结果显示,接头试样平均屈服强度为母材的49.3%,平均抗拉强度为母材的67.8%,断后伸长率为母材的18.5%。测试了焊接试样各区域的显微硬度,测试结果表明焊缝区域硬度高于其他部位,其中熔合线和热影响区之间的显微硬度最低,同时焊接试样的整体区域硬度均比母材低。对焊接试样进行腐蚀试验,发现接头焊缝区抗腐蚀能力明显强于母材。要提高2219铝合金焊接性能,需改进焊接工艺,减少熔合区以及热影响区的粗大晶粒的形成,解决CuAl2相的偏析等问题。
Abstract:
Microstructure and mechanism properties of 2219-T87 aluminum alloy TIG weld joint with 10 mm thickness are studied.The test results show that the average yield strength of the weld seam is 49.3%,the tensile strength is 67.8% and the elongation after the fracture is 65.4% of the base metal.Tensile fractures are observed from the micrograms.Microhardness is the highest in the weld zone and the lowest on the fusion line and in the heat influenced zone.The hardness of the whole plate is lower than that of the base metal after welding.The corrosion test shows that the corrosion of the weld zone is better than that of the base metal.The research revults show that the performance of 2219 aluminum alloy welding can be improved by meliorating the welding process which can decrease the formation of the fusion zone and heatinfluenced zone,and solving the problems of CuAl2 segregation,etc.

参考文献/References:

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备注/Memo

备注/Memo:
基金项目:江苏省自然科学基金(BK2012795);中央高校基本科研业务费专项资金资助项目(NO2012081);江苏高校优势学科建设工程资助项目
作者简介:薛彩军(1973-),男,博士,副教授,主要研究方向:飞行器结构强度,Email:cjxue@nuaa.edu.cn。
更新日期/Last Update: 2013-02-15