A comparative study of laser beam welding and laser–MIG hybrid welding of Ti–Al–Zr–Fe titanium alloy
A comparative study of laser beam welding and laser–MIG hybrid welding of Ti–Al–Zr–Fe titanium alloy
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DOI：
10.1016/j.msea.2010.09.084
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发表时间：
2011-01
期刊：
影响因子：
6.4
通讯作者：
Ruifeng Li;Zhuguo Li;Yanyan Zhu;L. Rong
中科院分区：
文献类型：
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作者：
Ruifeng Li;Zhuguo Li;Yanyan Zhu;L. Rong
采用激光焊接(LBW)和激光-MIG复合焊接(LAMIG)方法对厚度为4 mm的钛合金板材进行了焊接。通过光学显微镜观察、显微硬度测量和力学性能测试，研究了不同方法对接头性能的影响。试验结果表明，该板材能够以1.8m/min的速度、8kW的功率进行焊接，且无表面氧化、气孔、裂纹、焊缝未熔透等缺陷。此外，所有拉伸试验试件都在母材处断裂。与低强度TA-10焊丝相比，低强度TA-10焊丝改善了焊缝成形，降低了显微硬度，使LAMIG焊具有更高的延性。结果表明，激光熔化极气体保护焊更适合于钛合金板材的焊接。
Ti–Al–Zr–Fe titanium alloy sheets with thickness of 4mm were welded using laser beam welding (LBW) and laser-MIG hybrid welding (LAMIG) methods. To investigate the influence of the methods difference on the joint properties, optical microscope observation, microhardness measurement and mechanical tests were conducted. Experimental results show that the sheets can be welded at a high speed of 1.8m/min and power of 8kW, with no defects such as, surface oxidation, porosity, cracks and lack of penetration in the welding seam. In addition, all tensile test specimens fractured at the parent metal. Compared with the LBW, the LAMIG welding method can produce joints with higher ductility, due to the improvement of seam formation and lower microhardness by employing a low strength TA-10 welding wire. It can be concluded that LAMIG is much more feasible for welding the Ti–Al–Zr–Fe titanium alloy sheets.