均匀化处理对Al-0.53Mg-0.73Si-0.20Cu-0.23Mn合金铸态组织与性能的影响
Effect of Homogenization Treatment on Microstructure and Properties of Al-0.53Mg-0.73Si-0.20Cu-0.23Mn Alloy as Cast
祝哮 1刘兆伟 1张伟 1张宇 1董刘颖1
作者信息
- 1. 辽宁忠旺集团有限公司,辽宁辽阳 111003
- 折叠
摘要
通过力学性能、电导率等试验方法,金相显微镜、SEM、XRD等分析设备,研究了不同均匀化制度对该Al-Mg-Si系铝合金组织及性能的影响.结果表明:随着单级均匀化温度的升高,铸锭的枝晶网络断续分布,低熔点共晶溶解,强化作用以固溶强化为主,弥散强化为辅,强度先降低后升高;采用先低温后高温的双级均匀化制度时强度最高,采用先高温后低温双级均匀化制度时,强度最低,电导率趋势则与之相反.综合铸棒组织与性能分析,450℃×3 h+550℃×6 h为该Al-Mg-Si合金的最优均匀化工艺制度.
Abstract
The effects of different homogenizing systems on the microstructure and properties of Al-Mg-Si aluminum alloy were stud-ied by testing mechanical properties,electrical conductivity and metallographic microscopy,SEM and XRD.The results show that with the increase of single-stage homogenizing temperature,the dendrite network in the cast ingot is discontinuous,and the eutectic dissolves at low melting point.The strengthening effect is mainly solid solution strengthening,supplemented by dispersion strengthen-ing,with the strength first decreasing and then increasing.The strength is highest when using a dual-stage homogenizing system that starts at low temperature and then at high temperature,and the strength is lowest when using a dual-stage homogenizing system that starts at high temperature and then at low temperature,while the conductivity trend is opposite.Comprehensive analysis of cast ingot structure and properties,450℃×3h+550℃×6 h is the optimal homogenizing process for this Al-Mg-Si alloy.
关键词
Al-Mg-Si/均匀化/力学性能/微观组织Key words
Al-Mg-Si/homogenizing/mechanical property/microstructure引用本文复制引用
基金项目
国家重点研发计划(2021YFB3704203)
出版年
2024
NETL
NSTL
万方数据