A357铝合金的半固态触变成形性能分析  

Performance Analysis of Thixoformability of A357 Aluminum Alloy in Semi-solid State

作　　者：牛海侠 张琼 NIU Hai-xia;ZHANG Qiong(School of Mechanical Engineering,Anhui Sanlian College,Hefei 230601,China)

机构地区：[1]安徽三联学院机械工程学院,安徽合肥230601

出　　处：《兰州工业学院学报》2020年第2期81-85,共5页Journal of Lanzhou Institute of Technology

基　　金：安徽省教育厅高校自然科学重点项目(KJ2019A0892);安徽省高校优秀拔尖人才培育资助项目(gxgnfx2019071);安徽三联学院科研基金重点课题(KJZD2018007)。

摘　　要：通过对半固态A357化学成分分析和差热分析实验(DTA)测定其固相线和液相线温度,为半固态模锻成形工艺参数的制定提供支持,再通过半固态触变成形实验,确定了成形工艺参数,并对A357铝合金成形件的性能进行测试,结果表明:合金的成形机理主要是液相包裹着近球状固相颗粒进行流动,不断补缩和填充的触变成形;固溶+时效处理可以提高铝合金A357成形件的综合力学性能.Through the temperature of solidus phase and liquidus measured by chemical composition analysis and differential thermal analysis(DTA)experiments of semi-solid A357,the support for the formulation of forming process parameters of semi-solid die forging was provided.Then,the forming process parameters were determined by semi-solid thixoforming experiments,and the properties of A357 aluminum alloy parts were tested.The results show that the forming mechanism of alloy is,mainly,that the wrapped liquid phase flows around spherical solid particles,the thixoforming in continuous feeding and filling.The solution+aging treatment can improve the comprehensive mechanical properties of aluminum alloy A357.

关 键 词：半固态成形 触变成形 A357铝合金 力学性能 

分 类 号：TG146.3[一般工业技术—材料科学与工程]