电焊机2017，Vol.47Issue(3)：88-92,5.DOI:10.7512/j.issn.1001-2303.2017.03.17
焊接过程中Al-Mg-Zn铝合金的微观组织变化
Microstructure evolution of Al-Mg-Zn alloy during welding procedure
张志毅 1汪认 1刘建 1张晓鸿 2章淑芳 2陈辉2
作者信息
- 1. 中车青岛四方机车车辆股份有限公司,山东青岛266111
- 2. 西南交通大学,四川成都610031
- 折叠
摘要
Abstract
7XXX Al-Mg-Zn alloy was a widely used structure material in high-speed train body production manufacturing.In this paper,the aluminum alloy was heat treated by solution treatment along with natural aging process.During the welding process,the heattreated condition of aluminum alloy would be transformed by the welding heat source,resulting in the weakening of the mechanical properties of weldment.In this paper,the thermal cycling curve was collected during welding procedure test.Subsequently,the temperature evolution in HAZ was analyzed,and HAZ was subdivided into two sections of solid-solution area and aging area by peak temperature.Furthermore,the microstructure evolution and hardness distribution of two kinds of HAZ was concluded.After pulsed-MIG welding and laser-MIG hybrid welding procedure tests,hardness softening was recovered after 100 days natural aging process.关键词
7系铝合金/热处理强化板材/热循环/固溶区Key words
Al-Zn-Mg aluminum alloy/heat treatment reinforced plate/thermal cycling/solid solution region分类
矿业与冶金引用本文复制引用
张志毅,汪认,刘建,张晓鸿,章淑芳,陈辉..焊接过程中Al-Mg-Zn铝合金的微观组织变化[J].电焊机,2017,47(3):88-92,5.
