压力容器2017，Vol.34Issue(3)：10-16,29,8.DOI:10.3969/j.issn.1001-4837.2017.03.002
2219铝合金变极性等离子横焊接头补焊性能研究
Study on Repair Welding Performance of 2219 Aluminum Alloy Variable Polarized Plasma Welded Joint
摘要
Abstract
TIG welding of 8 mm thick 2219 aluminum alloy variable polarity plasma transverse welding joint was carried out,and a good repair welding joint was obtained.The mechanical properties,microstructure,fracture mode and fracture morphology of weld were analyzed.The results show that the mechanical properties and bending performance of the welded joints are higher than 60％ of base metal and 4％ of elongation after fracture.The eutectic structure produced by the welding joint is the junction of the welding joint and the original weld that is the main reason of cracking;by the organization and the impact of stomata,welding joints fracture path and mode is divided into three kinds,fracture and dimple,shallow depth,toughness fracture.关键词
补焊/横焊/变极性等离子/力学性能Key words
repair welding/horizontal position welding/variable polarity plasma arc welding/mechanical properties分类
机械制造引用本文复制引用
孙世烜,高彦军,毕煌圣,呼啸,刘政,焉嵩..2219铝合金变极性等离子横焊接头补焊性能研究[J].压力容器,2017,34(3):10-16,29,8.基金项目
国家自然科学基金资助项目(51375150,51205114) （51375150,51205114）
