铝合金厚板CMT补焊工艺试验

发布时间：2018-02-03 18:21

本文关键词： 冷金属过渡铝合金补焊　出处：《焊接学报》2015年05期 　论文类型：期刊论文

【摘要】：厚板铝合金产品在焊接生产制造中易出现局部气孔和焊接热裂纹等微小缺陷.对于重要产品需要进行修补,并且需要严格控制修补质量,降低焊接修复次数.针对铝合金厚板焊接结构修复质量提升的需求,利用低热输入、高质量的CMT焊接技术,进行7系高强铝合金CMT补焊工艺试验,与脉冲MIG焊接工艺的焊接接头组织进行了对比.结果表明,相对脉冲MIG焊接工艺,使用CMT工艺进行补焊的焊接温度场低,多次补焊焊接接头软化明显减弱,焊接接头组织恶化程度减弱.结果表明,铝合金厚板采用CMT焊接工艺进行补焊接头质量更为优良.
[Abstract]:Some minor defects such as local blowhole and welding hot cracks are easy to appear in the manufacture of thick plate aluminum alloy products. The repair of important products needs to be repaired and the repair quality must be strictly controlled. According to the requirement of improving the repair quality of aluminum alloy thick plate welding structure, using the low heat input and high quality CMT welding technology, the 7 series high strength aluminum alloy CMT repair welding process test was carried out. The results show that compared with the pulsed MIG welding process, the welding temperature field of the CMT process is lower than that of the pulsed MIG welding process. The softening and microstructure deterioration of the welded joints were obviously weakened, and the results showed that the quality of the joints was better when the CMT welding process was used for the thick aluminum alloy plates.
【作者单位】：南车青岛四方机车车辆股份有限公司;
【基金】：四方股份工艺开发资助项目(2014.315)
【分类号】：TG455
【正文快照】： 0序言高强铝合金焊接对焊接结构设计合理性、焊接工艺水平和材料质量要求很高,如果焊接工艺控制不当,特别是厚板铝合金焊接时层间温度、层间清理、焊道布置控制不当,厚板铝合金产品在焊接生产制造中易出现局部气孔和焊接热裂纹等微小缺陷.对于重要产品需要进行焊接修补,并且需

【共引文献】