CAJ | 학술논문

通过拉伸、弯曲和硬度等试验以及金相显微组织分析，研究多次补焊对5083- H111铝合金焊接接头组织与性能的影响。结果表明：未补焊和一次补焊~四次补焊时拉伸试件均断于焊缝，接头抗拉强度随补焊次数增加变化不大，并且均满足相关标准要求；未补焊和一次补焊~四次补焊焊接接头均具有良好的弯曲性能；未补焊和一次补焊~四次补焊时熔合线接头各区域硬度值变化不大，均无明显软化现象；接头各个区域的显微组织在补焊前后无明显变化。
통과랍신、만곡화경도등시험이급금상현미조직분석，연구다차보한대5083- H111려합금한접접두조직여성능적영향。결과표명：미보한화일차보한~사차보한시랍신시건균단우한봉，접두항랍강도수보한차수증가변화불대，병차균만족상관표준요구；미보한화일차보한~사차보한한접접두균구유량호적만곡성능；미보한화일차보한~사차보한시용합선접두각구역경도치변화불대，균무명현연화현상；접두각개구역적현미조직재보한전후무명현변화。
Microstructures and properties of 5083 - H111 aluminum alloy welded joints of no repair welding and first time to forth time repair welding by MIG welding were studied respectively through tensile tests,bending tests,hardness tests and Microstructures analysis in this paper. The results showed that during the tensile test,all the specimens were broken at the welded zone,the tensile strength re-mains with the increase of the number of repair welding and welding processes are all satisfied the standard. The no repair welding and the first time to forth time repair welding had better bending performance. The hardness in each zone of the welding joints changed little during the no repair welding and first time to forth time repair welding with no significant softening phenomenon. Microstructure in each zone of all the welded joints changed little before and after repair welding.