摘要
在铝合金熔化极惰性气体保护焊快速成形过程中,由于焊接热输入量大、电弧稳定性差等因素,层间堆积时易产生熔池外溢、坍塌等成形缺陷.应用低功率激光-MIG复合热源焊接工艺,以两种不同的层间堆积方式形成了铝合金单道多层墙体零件.并对零件的表面质量、金相组织以及显微硬度进行了分析.最后用该工艺在无支撑条件下形成了40°的斜面墙体零件.结果表明,与常规MIG焊相比,低功率激光-MIG复合热源焊接工艺能够对铝合金层间堆积过程进行更加精确稳定的控制,且零件组织更加均匀.
During the vertical deposition of aluminum using metal inert gas welding,defects such as molten pool spillover or collapse are formed easily,due to the great welding heat input and the poor arc stability.In this paper,aluminum wallshape parts were molded by low power laser-MIG hybrid welding in two different depositional styles.The surface quality,metallographic structure and micro-hardness were analyzed.A 40-degree-inclined wall-shape part was formed without support.The results showed that compared with MIG welding,low power laser-MIG hybrid welding could control the deposition process more accurately and more steadily,and could obtain more uniform microstructures.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2013年第5期71-74,116-117,共4页
Transactions of The China Welding Institution
基金
长江学者和创新团队发展计划资助项目(IRT1008)
国家自然科学基金资助项目(51005035)
关键词
快速成形
层间堆积
激光-MIG复合热源
铝合金
rapid prototyping
vertical deposition
laserarc hybrid heat source
aluminum alloy
