中国有色金属学报(英文版), 2017, 27(1): 91-101.
10.1016/S1003-6326(17)60010-4
Ti?6Al?4V钛合金蒙皮和骨架叠焊在航空航天器制造领域有着广泛应用。采用4kW ROFIN光纤激光器对其进行激光叠焊，利用数码显微镜、光学显微镜、扫描电镜和万能试验机研究激光焊接工艺参数对叠焊焊缝几何尺寸、气孔数量、显微组织和力学性能的影响。结果表明，三管侧吹保护气嘴优于单管侧吹保护气嘴，气流量≥5 L/min时可获得无氧化的焊缝；间隙控制在0.1 mm范围内能有效抑制气孔生成，重熔能有效地减少焊缝中已有的气孔；当激光焊接功率、焊接速度和离焦量分别为1700W、1.5 m/min和+8mm时可制得气孔最少、剪切强度最高的叠焊接头。
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