摘要
研究了焊后时效及固溶+时效热处理对2519铝合金焊接接头组织和力学性能的影响．结果表明,时效处理后,处于欠时效态的焊缝析出强化相增加,硬度升高,而过时效态的热影响区软化区组织和硬度没有明显变化,焊接接头的强度略微提高,塑性下降．固溶+时效处理后,焊缝中网状共晶减少,焊缝和热影响区软化区内的析出相形态变为细小的针状,且数量增加,焊缝金属硬度明显提高,热影响区的软化现象消失,焊接接头的强度和塑性显著增加．
Effect of both post-weld aging and solid solution plus aging treatment on the microstructures and mechanical properties of welded joint of 2519 aluminum alloy was investigated. The results showed that after aging treatment more precipitates formed in ill-aged weld metal, hardness of which increased as a result. However, microstructure and hardness of soft heat-affected zone （HAZ） that suffered over-aging didn＇t change obviously. The aging treatment increased strength of the welded joint a little and reduced ductility. After solid solution plus aging treatment the continuous and netlike eutectics in weld metal were decreased. At the same time a great weld metal and soft HAZ, which increased hardness of enhanced strength and ductility of welded joint. number of needlelike precipitates emerged in both weld metal farther, eliminated softening of HAZ,
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2006年第2期171-175,共5页
Chinese Journal of Materials Research
基金
国家八六三计划新材料领域2002AA305402资助项目~~
关键词
金属材料
2519铝合金
焊接接头
焊后热处理
metallic materials, 2519 Al alloy, welded joint, post-weld heat treatment
作者简介
本文联系人：国旭明
