Effect of filler wire melting mode on laser welding process
-
摘要: 研究了两种焊丝熔化方法(电弧预熔丝激光焊、激光填丝焊)激光焊接过程对匙孔稳定性以及焊缝成形的影响，进一步研究了焊丝熔化方法对焊接接头质量的影响，并对比分析了两种焊丝熔化方式对焊接速度的适应性. 结果表明，电弧预熔丝激光焊过程中，熔池表面匙孔开口尺寸变化不大，匙孔较为稳定；激光填丝焊方法由于熔化的液态金属距离匙孔边缘很近，焊接过程中熔池表面匙孔开口尺寸变化较大,而且容易出现熔池表面匙孔的闭合. 与激光填丝焊相比，电弧预熔丝激光焊熔化的焊丝端部可以沿熔池边缘流入，与匙孔边缘的距离较远，匙孔稳定性较好，焊缝气孔数量较少. 当焊接速度为8 m/min时，电弧预熔丝激光焊的焊缝成形良好；而激光填丝焊焊缝背面成形不连续，并且出现了未焊透的缺陷.Abstract: The effects of two filler wire melting methods (laser welding with pre-melted liquid filler by arc and laser welding with filler wire) on the stability of keyhole and the formation of weld seam during laser welding were studied. The influence of filler wire melting method on the quality of welded joints was further studied, and the adaptability of two filler wire melting methods to the welding speed was compared and analyzed. The test results showed that during the laser welding process with pre-melted liquid filler by arc, the keyhole opening size on the surface of the molten pool did not change much, and the keyhole was relatively stable. Because the melted liquid metal was very close to the edge of keyhole, the keyhole opening size on the molten pool surface varied greatly during the laser welding process with filler wire, and keyhole closure on the surface of molten pool was easy to occur. Compared with laser welding with filler wire, during the laser welding process with pre-melted liquid filler by arc, the end of the wire melted by the arc could flow along the molten pool edge, the distance between the liquid metal and keyhole edge was far, the stability of the keyhole was good, the number of weld holes was small.When the welding speed is 8 m/min, weld seams was well during laser welding with pre-melted liquid filler by arc; while the weld seams back surface was not continuous during laser welding with filler wire, and there was a defect of incomplete penetration.
-
Keywords:
- laser welding /
- pre-melted liquid filler by arc /
- aluminum alloy
-
-
![]()
图 2 电弧预熔丝焊丝熔化、填充过程
Figure 2. Melting and filling process of filler wire prefused by arc. (a) t0; (b) t0 + 34 ms； (c) t0 + 42 ms； (d) t0 + 54 ms
![]()
图 3 激光填丝焊焊丝熔化、填充过程
Figure 3. Melting and filling process of laser welding with filler wire. (a) t0; (b) t0 + 34 ms；(c) t0 + 42 ms；(d) t0 + 54 ms
![]()
图 4 焊缝表面成形
Figure 4. Weld surface forming. (a) laser welding with pre-melted liquid filler by arc； (b) laser welding with filler wire
![]()
图 5 焊缝纵截面
Figure 5. Weld longitudinal setion. (a) laser welding with pre-melted liquid filler by arc； (b) laser welding with filler wire
![]()
图 6 焊接接头的断口形貌
Figure 6. Fracture morphology of welded joint. (a) laser welding with pre-melted liquid filler by arc； (b) laser welding with filler wire
![]()
图 7 焊接速度为4 m/min的焊缝成形
Figure 7. Weld forming with welding speed of 4 m/min. (a) laser welding with pre-melted liquid filler by arc； (b) laser welding with filler wire
-
[1] 陈根余, 张焱, 雷燃. 42CrMo钢活塞激光-MAG复合焊接热裂纹试验[J]. 焊接学报, 2019, 40(7): 61 − 66. doi: 10.12073/j.hjxb.2019400182 Chen Genyu, Zhang Yan, Lei Ran. Testing of hot crack using laser-MAG combined welding for 42CrMo steel[J]. Transactions of the China Welding Institution, 2019, 40(7): 61 − 66. doi: 10.12073/j.hjxb.2019400182
[2] 舒服华, 田会方. 基于SPA的6061铝合金脉冲激光焊接工艺参数优化[J]. 焊接学报, 2018, 39(4): 109 − 114. doi: 10.12073/j.hjxb.2018390106 Shu Fuhua, Tian Huifang. Process parameters optimization of pulsed laser welding of 6061 aluminum alloy based on SPA[J]. Transactions of the China Welding Institution, 2018, 39(4): 109 − 114. doi: 10.12073/j.hjxb.2018390106
[3] Tian D Y, Yan T Y, Gao Q Y, et al. Thermal cycle and its influence on the microstructure of laser welded butt joint of 8 mm thick Ti-6Al-4V alloy[J]. China Welding, 2019, 28(3): 61 − 66.
[4] 黄彩艳, 陈俐. 高能束焊接系统及应用技术研究新进展[J]. 焊接, 2019(10): 31 − 37. Huang Caiyan, Chen Li. New research progress on welding system and application technologies of high energy beam[J]. Welding & Joining, 2019(10): 31 − 37.
[5] 张旺, 孟威, 郭彦兵, 等. 脉冲激光与脉冲 ＧＭＡＷ 复合焊接的动态交互行为[J]. 中国激光, 2019, 46(4): 0402002. Zhang Wang, Meng Wei, Guo Yanbing, et al. Dynamic interaction behavior of pulse GMAW+pulse laser hybrid welding［J］.Chinese Journal of Lasers, 2019, 46(4): 0402002.
[6] 谷晓燕, 朱开轩, 隋成龙, 等. 镁合金/钛合金脉冲激光焊接头的组织、性能调控[J]. 中国激光, 2020, 47(1): 0102005. Gu Xiaoyan, Zhu Kaixuan, Sui Chenglong, et al. Research on drop transfer of ultra narrow gap laser wires filling welding of bogies frame for high speed trains[J]. Chinese Journal of Lasers, 2020, 47(1): 0102005.
[7] Gao M, Wang Z M, Yan J, et al. Dissimilar Ti/Mg alloy butt welding by fibre laser with mg filler wire - preliminary study[J]. Science and Technology of Welding and Joining, 2011, 16(6): 488 − 496. doi: 10.1179/1362171811Y.0000000033
[8] 刘红兵, 陶汪, 陈洁, 等. 激光填丝焊焊丝熔入行为特征[J]. 焊接学报, 2013, 34(11): 73 − 77. Liu Hongbing, Tao Wang, Chen Jie, et al. Filler wire dynamics during laser beam welding with filler wire[J]. Transactions of the China Welding Institution, 2013, 34(11): 73 − 77.
[9] Ohnishi T, Kawahito Y, Mizutani M, Katayama S. Butt welding of thick, high strength steel plate with a high power laser and hot wire to improve tolerance to gap variance and control weld metal oxygen content[J]. Science and Technology of Welding and Joining, 2013, 18(4): 314 − 322. doi: 10.1179/1362171813Y.0000000108
[10] Xie J. Dual beam laser welding[J]. Welding Journal, 2002, 81(10): 223 − 230.
-
期刊类型引用(1)
1. 李力，王一轩，罗芬，张文涛，赵巍，李小强. 钎焊时间对TiH_2-65Ni+TiB_2钎料钎焊连接TiAl合金接头的影响. 机械工程学报. 2024(08): 176-185 . 
百度学术
其他类型引用(1)
下载:
计量
- 文章访问数: 629
- HTML全文浏览量: 39
- PDF下载量: 38
- 被引次数: 2
