Effect of Ti and Ce Microalloy on Microstructure and Properties of Al-Si-Cu-Zr-Sr Cast Aluminum Alloy  

作　　者：姚辉 许晓静 ZHANG Rikai ZHANG Peng SUN Zhiwei WANG Hao YAO Hui;XU Xiaojing;ZHANG Rikai;ZHANG Peng;SUN Zhiwei;WANG Hao(Institute for Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Zhenjiang,212013,China)

机构地区：[1]Institute for Advanced Manufacturing and Modern Equipment Technology,Jiangsu University,Zhenjiang,212013,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第4期897-902,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Key Projects of Equipment Pre-research Foundation of the Ministry of Equipment Development of the Central Military Commission of China(No.6140922010201);the Key R&D Plan of Zhenjiang in 2018(No.GY2018021)。

摘　　要：The effect of Ti and Ce microalloying on the mechanical properties of Al-9Si-3.5Cu-0.2Zr-0.1Sr cast aluminum alloy was investigated,and it was hoped that the cast aluminum alloy with excellent comprehensive properties could be obtained.On the basis of Zr-Sr microalloyed cast aluminum alloy(Al-9Si-3.5Cu-0.2Zr-0.1Sr),the effects of 0.2Zr-0.1Sr-0.16Ti ternary microalloying and 0.2Zr-0.1Sr-0.16Ti-0.1Ce quaternary microalloying on the microstructure and properties of the alloy were investigated.The experimental results show that compared with Zr-Sr microalloying,Zr-Sr-Ti microalloying and Zr-Sr-Ti-Ce microalloying can effectively refine the microstructure,improve the modification effect of Si phase,and promote the improvement of Al_(2)Cu phase,thus improving the properties.The higher the degree of microalloying,the hardness is gradually increasing,but the electrical conductivity is gradually decreasing.Zr-Sr-Ti microalloying can increase the tensile strength of the alloy to 400.07 MPa and the elongation to 9.5%.Zr-Sr-Ti-Ce microalloying do not continue to improve the properties of the alloy,and the tensile strength and elongation after fracture decrease to a certain extent due to the addition of Ce.Therefore,the best comprehensive properties can be obtained by ZrSr-Ti microalloying(Al-9Si-3.5Cu-0.2Zr-0.1Sr-0.16Ti).

关 键 词：cast aluminum alloy MICROALLOYING mechanical properties AL-SI-CU 

分 类 号：TG146.21[一般工业技术—材料科学与工程]