6061铝合金均匀化处理及AlMnFeSi相的演变规律
Homogenization of 6061 Aluminum Alloy and Evolution of AlMnFeSi Phase
袁滔 1赵圆杰 1袁杰 1宋滋明 1李绍宏 1李俊 1卜恒勇 1李萌蘖1
作者信息
- 1. 昆明理工大学材料科学与工程学院,昆明 650504
- 折叠
摘要
采用OM、SEM、EDS、XRD等手段研究了 6061铝合金在540、560、580 ℃进行均匀化处理过程中,硬度变化及微观组织中AlMnFeSi相的演变规律.结果表明,均匀化温度低于540 ℃时第二相不能充分溶入基体,均匀化温度高于580 ℃时会出现过烧现象,6061铝合金在560 ℃均匀化处理9 h后能获得最佳的均匀化处理效果.另外,在均匀化处理过程中,粗棒状的β-AlMnFeSi相会逐渐转变为弥散细小的α-AlMnFeSi相.通过统计第二相面积分数随温度和时间的变化规律表明,β-AlMnFeSi相向α-AlMnFeSi相的转变速率较高,而在均匀化中后期则逐渐减缓,并且温度升高有利于加速这一转变.
Abstract
The changes of hardness and the evolution of AlMnFeSi phase in 6061 aluminum alloy during homogenization at 540,560 and 580 ℃ were studied by OM,SEM,EDS and XRD.The results show that the second phase cannot fully dissolve into the matrix when the homogenization temperature is lower than 540 ℃,and overburning occurs when the homogenization temperature is higher than 580 ℃.The best homogenization effect of 6061 aluminum alloy can be obtained after homogenization treatment at 560 ℃ for 9 h.In addition,the coarse rod-like β-AlMnFeSi phase gradually transforms into dispersing α-AlMnFeSi phase during homogenization.The statistical variation of the area fraction of the second phase with temperature and time shows that the transition rate of β-AlMnFeSi to α-AlMnFeSi phase is high,but it slows down gradually in the middle and late homogenization,and the temperature increase is beneficial to accelerate the transition.
关键词
6061铝合金/均匀化处理/AlMnFeSi相Key words
6061 aluminium alloy/homogenizing treatment/AlMnFeSi phase引用本文复制引用
基金项目
云南省重点研发计划(202103AA080017)
云南省科技人才与平台计划(202005AE160016)
出版年
2024
NETL
NSTL
万方数据