摘要
针对焊枪可达性差等难熔合焊接结构,提出了活性熔化极气体保护焊焊接新方法。该方法可增加焊接熔深,改善难熔焊接结构的熔合不良,获得高质量的焊接接头。采用活性熔化极气体保护焊接对耐候钢进行了工艺试验,对焊接接头组织、冲击韧性及断口形貌进行分析。结果表明,相对熔化极气体保护焊,活性熔化极气体保护焊在同等焊接热输入下熔深显著增加,焊缝表面及焊接接头内部质量高,接头组织更为细化,过热区析出碳化物相也更加细小弥散,冲击韧性提高,冲击断口韧性特征更明显。
In order to solve the lack of fusion, A-MAG welding was invented, which obtained welded joints of high quality. The experiment results show that surface appearance of A-MAG weld, internal quality of welding joint and the welding operation perform very well. Experiments also show that the A-MAG welding can improve weld pene- tration, compared with MAG welding on the same heat input. The tensile property and bending strength of A-MAG are not reduced while impact strength is improved, especially in the HAZ. Dimples size of A-MAG welded joint frac- ture becomes finer. It is shown that the active MAG welding can improve the welding quality and weld penetration of weathering steel, which has the value of engineering application.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2015年第5期66-69,共4页
Aerospace Materials & Technology
基金
四方股份工艺开发资助项目(2012003)
关键词
活性熔化极气体保护焊
耐候钢
接头组织
冲击断口
Activating flux MAG welding, Weathering steel, Welding bead, Impact fracture
