不同Mn含量及焊接电流对ER5356铝合金焊丝焊接性能的影响

Effect of different Mn content and welding current on the welding performance of ER5356 aluminum alloy welding wire

摘要:

为研究不同Mn含量ER5356铝合金焊丝和焊接电流对焊接焊头性能的影响，实验使用含锰量为0.05%和0.15%的ER5356铝合金焊丝，分别在110，115和125 A焊接电流下，采用TIG焊接6082铝合金．结果表明：用ER5356(0.15%的Mn)铝合金焊丝焊接得到的焊接接头的性能整体优于ER5356(0.05%的Mn)焊丝焊接得到的焊接接头，因Mn元素可以改善焊接接头的力学性能，进而提高铝合金焊接质量；随着焊接电流的增大，焊缝成形质量提高，当焊接电流为125 A时，无焊接热裂纹等宏观缺陷，焊接接头断口几乎观察不到未焊透的现象, 焊接接头匹配系数最高达到0.71.

Abstract:

In order to study the effect of different Mn content ER5356 aluminum alloy welding wire and welding current on the performance of welding head，In this experiment， ER5356 aluminum alloy welding wire with 0.05% and 0.15% manganese content was used. The 6082 aluminum alloy was welded by TIG at 110 A， 115 A and 125 A welding currents. The results show that ER5356 （0.15%Mn） aluminum alloy welding wire was welded. The overall performance of the obtained welded joint is better than that of welded joints welded by ER5356 （0.05%Mn） wire. Mn can improve the mechanical properties of the welded joints， thereby improving the welding quality of aluminum alloys. As the welding current increases， the quality of weld formation improves. When the welding current is 125 A， there are no macro defects such as welding hot cracks， and there is almost no incomplete penetration in the fracture of the welded joint， the matching coefficient of welded joints can reach up to 0.71.