摘要
通过对AZ系镁合金钨极氩弧焊(TIG)焊接接头进行固溶时效处理,研究其显微组织和显微硬度的变化。结果表明,在时效初始阶段(0~10h),熔合区中Al和Zn元素扩散速度和β-Mg17(Al,Zn)12的体积分数增加较快,其显微硬度随之增加较快。随着时效时间的延长,熔合区中的β-Mg17(Al,Zn)12的析出逐渐达到饱和,β-Mg17(Al,Zn)12的体积分数不再增加,显微硬度基本不变。
The effects of solution and aging treatments on a 2mm tungsten inert gas(TIG) butt welded joint was investigated by examining the microstructures and the microhardness.The results show that: At the beginning of the aging treatment(0-10h),the microhardness of the fusion zone increased sharply due to the fast increase of the diffusion rate of Al and Zn and the volume fraction of β-Mg17(Al,Zn)12.With the increase of the aging time,the microhardness of the fusion zone did not increase because the Al and Zn elements reached the saturated composition.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第4期682-684,共3页
Journal of Functional Materials
基金
中央高校基本科研业务资助项目(CDJXS10131155
CDJZR10130010)
重庆市自然科学基金资助项目(CSTC
2010BB4039)
重庆市科技攻关计划资助项目(CSTC
2009AC4046)
关键词
镁合金
TIG焊
时效处理
显微硬度
Mg-Al-Zn alloy
TIG welding
aging treatment
microhardness