T5处理对高真空压铸Al-10Si-Cu-Mg-Mn合金组织影响
Effects of T5 Heat Treatment on Microstructure of High Vacuum Die Casting Al-10Si-Cu-Mg-Mn Alloy
刘金辉 1赵海东 1高军民 2李史华 2侯小华2
作者信息
- 1. 华南理工大学国家金属材料近净成形工程技术研究中心,广州 510640
- 2. 文灿集团股份有限公司,广州 523000
- 折叠
摘要
采用高真空压铸制备了不同Cu含量的AlSi10CuMgMn合金,采用光学显微镜(OM)、扫描电镜(SEM)和透射电镜(TEM)对铸态和T5态合金微观组织进行研究.结果表明,不同Cu含量下,铸态合金组织由α-Al、共晶Si和α-Fe、Q和θ相组成.随着Cu含量增加,Q相数量变化不大,形貌以层片状为主;θ相数量则逐渐增多,形貌由分散的粒状转变成聚集的块状.T5热处理不会改变相的类型和形貌,峰值时效时主要析出相为β″和θ′相,Cu含量较低时,析出相以β″相为主,Cu含量较高时,析出相以θ′相为主.
Abstract
Al-10Si-Cu-Mg-Mn alloys with different Cu contents were prepared by high vacuum die casting process.The microstructure of as-cast and T5 alloys were investigated by OM,SEM and TEM.The results indicated that the microstructure of as-cast alloys consists of α-Al,eutectic Si and α-Fe,Q and θ phases.With the increase of Cu con-tent,the number of Q phase keeps stable,and the morphology is mainly lamellar.The amount of θ phase is gradually increased,and the morphology is changed from dispersed granular to aggregated blocky.T5 heat treatment cannot change phase types and morphology,and the main precipitated phases are β″ and θ′ phases at peak aging condition.With a lower Cu contents,the precipitated phase is dominated by β″ and at higher Cu contents,the precipitated phase is dominated by θ′.
关键词
AlSi10CuMgMn合金/高真空压铸/T5热处理/微观组织Key words
Al-10Si-Cu-Mg-Mn Alloy/High Vacuum Die Casting/T5 Heat Treatment/Microstructure引用本文复制引用
基金项目
广东省重点领域研发计划(2020B10186002)
佛山市核心技术攻关资助项目(1920001001040)
出版年
2024
NETL
NSTL
万方数据