CAJ | 학술논문

为了研究铝合金表面状态和焊接工艺方法对焊接接头性能的影响，采用Nd∶YAG脉冲激光器对Al-Mg系铝合金激光焊接方法进行了理论分析和实验验证，得到了焊接接头性能实验结果。结果表明，原始表面和碱蚀表面处理的试样焊接过程不稳定，阳极氧化试样焊接中形成了稳定的小孔效应，焊接过程较稳定；阳极氧化、两面焊、填粉焊都能有效提高焊缝熔深和深宽比；试样阳极氧化、双面焊、填粉焊可使焊缝抗拉强度提高1倍以上，其中Al-0．05Si填粉焊提升效果最好；表面处理试样硬度都有所提高，磷酸阳极氧化提高效果最好。双面焊工艺使焊缝和熔合区硬度提高，填粉焊焊缝中心硬度很低但熔合区硬度提高明显，双面焊、填粉焊热影响区硬度低于单面焊。阳极氧化表面处理、双面焊工艺可以有效地改善Al-Mg铝合金的激光焊接性。
위료연구려합금표면상태화한접공예방법대한접접두성능적영향，채용Nd∶YAG맥충격광기대Al-Mg계려합금격광한접방법진행료이론분석화실험험증，득도료한접접두성능실험결과。결과표명，원시표면화감식표면처리적시양한접과정불은정，양겁양화시양한접중형성료은정적소공효응，한접과정교은정；양겁양화、량면한、전분한도능유효제고한봉용심화심관비；시양양겁양화、쌍면한、전분한가사한봉항랍강도제고1배이상，기중Al-0．05Si전분한제승효과최호；표면처리시양경도도유소제고，린산양겁양화제고효과최호。쌍면한공예사한봉화용합구경도제고，전분한한봉중심경도흔저단용합구경도제고명현，쌍면한、전분한열영향구경도저우단면한。양겁양화표면처리、쌍면한공예가이유효지개선Al-Mg려합금적격광한접성。
In order to study effect of aluminum surface state and welding processing on the properties of welding joints , the process of laser welding Al-Mg series aluminum alloy with Nd∶YAG laser was analyzed in theory and verified in experiments .The experimental results of the characteristics of welding joints were obtained .The results show that welding process of untreated sample and alkali corrosion surface treatment sample are not stable while welding process of anodizing treatment sample is stable and hole effect is formed stably .Weld seam penetration and depth-to-width ratio are all improved effectively by the aid of anodizing, double welding and powder filling welding .The tensile strength of the weld seam of anodizing sample , double-sided welding sample and powder filling welding sample increases more than 1 times and powder filling welding sample of Al-0.05Si has the highest tensile strength .Hardness of all surface treatment samples is improved and the effect of phosphoric acid anodizing is the best.Hardness of weld seam and fusion zone is improved through double welding .Central hardness of powder filling weld is lower while hardness of fusion zone increases obviously .Hardness of heat affected zone of double welding and powder filling welding is lower than hardness of single side welding .The results show that anodic oxidation surface treatment and double-sided welding technology can improve the property of laser welding of Al-Mg series aluminum alloy effectively .