热源同轴辅助搅拌摩擦焊工艺特性分析
Investigation on laser coaxially assisted friction stir welding of aluminum alloys
-
摘要: 研究了激光同轴辅助搅拌摩擦焊中激光/搅拌摩擦焊的热量分配对不同系列铝合金焊缝成形、接头力学性能及显微组织的影响，并得到了相应的优化能量分配条件.结果表明，加入激光辅助热源可有效扩大工艺参数窗口，特别是流动性差的5A06和2219铝合金，焊接速度可提升30%以上.激光辅助热源对6061及5A06铝合金焊接接头性能影响较小，对2219铝合金搅拌摩擦焊接头的性能影响明显，焊接热输入增大后，接头性能下降，但总得来说，加入激光辅助热源能够在更小的焊接热输入下获得更高的接头性能.Abstract: The laser coaxially assisted friction stir welding process of aluminum alloys of different series (5A06, 6061, 2219) was investigated, concentrating on the effects of friction stir heat and laser heat distribution on weld appearance, mechanical properties and microstructure characteristics of the joints. The optimized heat distribution conditions for alloys of different series were obtained. The results show that assisted laser heat can effectively enlarge the process window, especially for 5A06 and 2219 which have low fluidity, can increase the welding speed by 30%. Assisted laser heat has no obvious influence on microstructure of 5A06 FSW nugget zone, but decreases the amount of second phase Mg2Si in 6601 FSW nugget zone and makes them dispersed, the assisted laser also decreases the amount of strengthening phase CuAl2(θ) and increases their sizes. For 5A06 and 6061, assisted laser heat has no obvious influence on the joint mechanical properties. However, for the heat treated alloy 2219, assisted laser heat decreases the joint strength, but can obtain high joint strength by welding under low friction stir heat input.
-
-
[1] Nandan R, DebRoy T, Bhadeshia H. Recent advances in friction-stir welding-Process, weldment structure and properties[J]. Progress in Materials Science, 2008, 53(6):980-1023.[DOI: 10.1016/j.pmatsci.2008.05.001] [2] Liu H J. Friction stir welding assisted by micro-plasma arc[J]. Science and Technology of Welding and Joining. 2009, 3(14):193-195. [3] Sun Y F, Konishi Y, Kamai M, et al. Microstructure and mechanical properties of S45C steel prepared by laser-assisted friction stir welding[J]. Materials and Design. 2013(47):842-849. [4] Merklein M, Giera A. Laser assisted Friction Stir Welding of drawable steel-aluminum tailored hybrids[J]. International Journal of Mater Form. 2008(1):1299-1302. [5] Mishra R S, Ma Z Y. Friction stir welding and processing[J]. Materials Science and Engineering:R:Reports, 2005, 50(1):1-78. [6] 许辉, 封小松, 徐奎. 铝合金空间热辅助搅拌摩擦焊技术[J]. 载人航天, 2016, 22(3):308-312. Xu Hui, Feng Xiaosong, Xu Kui. Heat assisted friction stir welding of aluminum in space[J]. Manned Spacelight, 2016, 22(3):308-312.[DOI: 10.3969/j.issn.1674-5825.2016.03.006] [7] 许辉, 封小松, 尹玉环, 等. 热源同轴辅助搅拌摩擦焊热过程数值分析[J]. 载人航天, 2015, 3(21):243-248. Xu Hui, Feng Xiaosong, Yin Yuhuan, et al. Numerical analysis of thermal behavior in heat coaxially assisted friction stir welding[J]. Manned Spacelight, 2015, 3(21):243-248. [8] 汪建华, 姚舜, 魏良武. 搅拌摩擦焊焊接的传热和力学计算模型[J]. 焊接学报, 2000, 21(4):61-64. Wang Jianhua, Yao Shun, Wei Liangwu. Thermal and thermo-mechanical modeling of friction stir welding[J]. Transactions of the China Welding Institution, 2000, 21(4):61-64.[DOI: 10.3321/j.issn:0253-360X.2000.04.016] [9] 陈君, 张群莉, 姚建华, 等. 金属材料的激光吸收率研究[J]. 应用光学, 2008, 29(5):793-798. Chen Jun, Zhang Qunli, Yao Jianhua, et al. Study on laser absorptivity of metal material[J]. Journal of Applied Optics, 2008, 29(5):793-798.[DOI: 10.3969/j.issn.1002-2082.2008.05.029] -
期刊类型引用(3)
1. 吴斌，杨敬，焦敬品，何存富，齐高君. 奥氏体不锈钢小径管焊缝缺陷多模式超声复合全聚焦成像研究. 机械工程学报. 2020(14): 9-18 . 
百度学术
2. 沈成业，洪朝，黄海军，钱盛杰，王杜. 焊缝缺陷的全聚焦相控阵成像检测. 无损检测. 2020(09): 45-49 . 百度学术
3. 范学腾，伏喜斌，黄学斌，钟舜聪，方波，林起本，唐长明. 复合粘接结构脱粘缺陷全聚焦成像模拟及算法优化研究. 机电工程. 2019(08): 791-796 . 百度学术
其他类型引用(5)
计量
- 文章访问数: 631
- HTML全文浏览量: 8
- PDF下载量: 68
- 被引次数: 8
下载:
