不同固溶制度对2219铝合金晶粒生长的影响
Influence of different solution treatment parameters on grain growth of 2219 aluminum alloy
林锡悦 1李贤君 1巫小林 1董承智 1贾巍 1刘文斌 1徐兵权 1杨杰1
作者信息
- 1. 中国机械总院集团北京机电研究所有限公司,北京 100083
- 折叠
摘要
探究了 8 mm厚的2219铝合金在不同固溶制度下的晶粒生长情况,分析其演变规律并确定了较佳的固溶制度.将2219铝合金试样加热至不同温度(525、535、545 ℃)并保温不同时间(30、50、70 min)后水冷至室温.采用金相显微镜对固溶前后试样的晶粒尺寸进行了表征.结果表明,固溶温度越高,保温时间越长,固溶程度越充分,晶粒尺寸越大,最大可达303 μm,但晶粒尺寸过大会影响材料的力学性能,使材料的硬度整体呈现先增后减的趋势,并且会发生过烧现象.结合试样硬度,厚度为8 mm的2219铝合金较佳固溶制度为535℃保温70 min.
Abstract
Grain growth rule of the 2219 aluminum alloy with thickness of 8 mm under different solution treatment parameters was explored,the microstructure evolution was analyzed and the best solution treatment parameters were determined.The 2219 aluminum alloy specimens were heated to different temperatures(525,535,545 ℃)and kept for different time(30,50,70 min)before water-cooled to room temperature.The grain size of the specimens before and after solution treatment was characterized by using metallographic microscope.The results show that higher solution temperature and longer holding time can lead to more completely solution and larger grain size,which can reach a maximum of 303 μm.However,excessive grain size affects the mechanical properties of the material,resulting in the overall hardness of the material first increases and then decreases,and over-burning occurs.Considering the specimen hardness,the optimal solution treatment parameters for the 2219 aluminum alloy with a thickness of 8 mm is heating to 535 ℃ and holding for 70 min.
关键词
2219铝合金/固溶/晶粒尺寸Key words
2219 aluminum alloy/solution treatment/grain size引用本文复制引用
基金项目
中国机械科学研究总院集团有限公司技术发展基金()
出版年
2024
NETL
NSTL
万方数据