铸造技术2017，Vol.38Issue(12)：2966-2968,2976,4.DOI:10.16410/j.issn1000-8365.2017.12.047
压铸AZ91D镁合金氩弧焊缝气孔及消除措施研究
Study on Pore and Elimination of GTAW Welded Joint of AZ91D Magnesium Alloy
摘要
Abstract
The welding joint of AZ91D alloy was prepared by GTAW,and the microstructures,types and distribution characteristics of the pore were observed by scanning electron microscopy.The formation mechanism of the pore was explained and the effects of heat input on the pore were discussed.The results show that the microstructures are mainly distributed in the weld near the surface and the weld line,and the macroscopic pores are mainly distributed in the middle of the weld.With the increase of heat input,the size of the maximum macropore and the porosity will increase.Adding filler materials can obviously reduce the porosity of welding,reduce the size of macro pores,but it can't completely eliminate the welding pores.关键词
压铸镁合金/钨极氩弧焊/气孔Key words
die-cast magnesium alloy/GTAW/pore分类
金属材料引用本文复制引用
王向杰,徐绍勇,杜娟,游国强..压铸AZ91D镁合金氩弧焊缝气孔及消除措施研究[J].铸造技术,2017,38(12):2966-2968,2976,4.基金项目
国家自然科学基金青年基金项目(51405146) （51405146）
湖北省科技计划资助项目(2014CFC1095) （2014CFC1095）
湖北理工学院引进人才项目(14xjz02R) （14xjz02R）
