中国激光, 2014, 41 (1): 0103007, 网络出版: 2013-12-24   

2198-T851铝锂合金激光焊接工艺研究

Laser Beam Welding Study of 2198-T851 Aluminum-Lithium Alloy
作者单位
北京工业大学激光工程研究院, 北京 100124
摘要
铝锂合金被认为是在航空航天领域中实现飞行器轻量化的理想结构材料之一。采用高功率光纤激光器焊接1.76 mm厚的2198-T851铝锂合金,研究填充ER4047焊丝时激光功率、焊接速率和送丝速率对焊接热裂纹和焊缝组织的影响,以及最优焊接工艺下焊接接头的显微组织与力学性能。结果表明,当激光功率为4 kW,焊接速率为4 m/min,送丝速率为4 m/min时,填充ER4047焊丝焊接可获得成形良好且无宏观裂纹缺陷的焊接接头。接头的平均抗拉强度为342 MPa,拉伸断裂后接头断裂强度达到母材的65.4%,熔合区为薄弱部位。
Abstract
Aluminum-lithium alloys are considered to be one of the most ideal light-weight materials for aerospace applications. 2198-T851 with thickness of 1.76 mm is welded with filler wire ER4047 by using a high power fiber laser. The effects of the laser power, welding speed and wire feeding velocity on solidification cracking susceptibility and microstructures are investigated, as well as the joint microstructure and mechanical properties under the optimal welding process. The results indicate that a joint with good surface appearance and no hot crack is obtained with the optimal welding parameters of 4 kW laser power, 4 m/min welding speed and 4 m/min wire feeding velocity. The average tensile strength of joints is 342 MPa, and reaches 65.4% of the tensile strength of base metal. The bond is the weakness region of the joint.
参考文献

[1] J C Lippold. Weld ability of commercial aluminium-lithium alloys[C]. Proceedings of the 5th International Aluminium-Lithium Alloy Conference, 1989. 1365-1375.

[2] J L Enrique, J G Nicholas. Review aluminum-lithium alloys[J]. Mater Sci, 1987, 22(5): 1521-1529.

[3] P K Gupta, N Nayan, G Nagasireesha. Development and characterization of Al-Li alloys[J]. Materials Science and Engineering A, 2006, 420(1-2): 228-234.

[4] K H Rengdigs. Aluminium structures used in aerospace-status and prospects[J]. Materials Science Forum, 1997, 242: 11-24.

[5] 蔡华, 肖荣诗, 陈铠. 1420铝锂合金CO2激光焊接接头的力学性能研究[J]. 中国激光, 2009, 36(s1): 122-125.

    Cai Hua, Xiao Rongshi, Chen Kai. Mechanical property of CO2 laser welded joint of 1420 aluminum-lithium alloy[J]. Chinese J Lasers, 2009, 36(s1): 122-125.

[6] 肖荣诗, 杨武雄, 陈铠. 1420铝锂合金YAG激光焊接[J]. 中国激光, 2007, 34(s1): 239-241.

    Xiao Rongshi, Yang Wuxiong, Chen Kai. NdYAG laser welding of 1420 aluminum lithium alloy[J]. Chinese J Lasers, 2007, 34(s1): 239-241.

[7] 肖荣诗, 杨武雄, 陈铠. 1420铝锂合金激光焊接气孔行为特性研究[J]. 应用激光, 2007, 27(1): 13-17.

    Xiao Rongshi, Yang Wuxiong, Chen Kai. Porosity characterization in laser welds of Al-Li alloy 1420[J]. Applied Laser, 2007, 27(1): 13-17.

[8] 杨武雄, 张心怡, 肖荣诗. 2060-T8/2099-T83铝锂合金T型接头双光束激光焊接工艺[J].中国激光, 2013, 40(7): 0703001.

    Yang Wuxiong, Zhang Xinyi, Xiao Rongshi, Dual-beam laser welding of T-joint of aluminum-lithium alloy 2060-T8/2099-T83[J]. Chinese J Lasers, 2013, 40(7): 0703001.

[9] 翟玉峰, 黄坚, 李敏, 等. 6061-T6铝合金高速高功率CO2激光填丝焊接性的研究[J].中国激光, 2011, 38(5): 0503001.

    Zhai Yufeng, Huang Jian, Li Min, et al.. Research on high speed high power CO2 laser welding of 6061-T6 aluminum with filler wire[J]. Chinese J Lasers, 2011, 38(5): 0503001.

[10] A Fabregue, M Deschamps, Suery, et al.. Two-and three-dimensional characterizations of hot tears in an Al-Mg-Si alloy laser weld[J]. Scripla Materialia, 2008, 59(3): 324-327.

[11] J N Fridlyander, N I Kolobnev, L B Khokhlatova, et al.. Structure and properties of sheets of 1424 alloy[J]. Materials Science Forum, 2000, 331-337: 1393-1398.

[12] J C Lippold, W Lin. Weld ability of commercial Al-Cu-Li alloys[J]. Materials Science Forum, 1996, 217 (3): 1685-1690.

[13] 左铁钏. 高强铝合金的激光加工[M]. 北京: 国防工业出版社, 2002. 1-4, 87-89.

    Zuo Tiechuan. Laser Materials Processing of High Strength Aluminum Alloys[M]. Beijing: National Defense Industry Press, 2002. 1-4, 87-89.

[14] P A Mollan, T S Srivatsan. Weldability of aluminium-lithium alloy 2090 using laser welding[J]. Journal of Materials Science, 1990, 25: 3374-3358.

[15] A Siqueira, A Garcia. Solidification thermal parameters affecting the columnar to equiaxed transition[J]. Metallurgical and Materials Transactions A, 2002, 33(7): 2107-2118.

[16] 许良红, 田志凌, 彭云, 等. 高强铝合金的激光焊接头组织及力学性能[J]. 中国激光, 2008, 35(3): 456-461.

    Xu Lianghong, Tian Zhiling, Peng Yun, et al.. Microstructure and mechanical properties of high strength aluminum alloy laser welds[J]. Chinese J Lasers, 2008, 35(3): 456-461.

林凯莉, 杨武雄, 吕俊霞, 肖荣诗. 2198-T851铝锂合金激光焊接工艺研究[J]. 中国激光, 2014, 41(1): 0103007. Lin Kaili, Yang Wuxiong, Lü Junxia, Xiao Rongshi. Laser Beam Welding Study of 2198-T851 Aluminum-Lithium Alloy[J]. Chinese Journal of Lasers, 2014, 41(1): 0103007.

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