Sr、Y复合添加对A356铝合金组织和力学性能的影响  

Effect of Sr,Y Compound Addition on Microstructure and Mechanical Properties of A356 Aluminum Alloy

作　　者：孙彦华 张艺杰 杜景红[3] 谭国寅 岳有成 冯炜光 SUN Yanhua;ZHANG Yijie;DU Jinghong;TAN Guoyin;YUE Youcheng;FENG Weiguang(Kunming Metallurgical Research Institute Company Limited,Kunming 650031,China;State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources,Kunming 650031,China;Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China)

机构地区：[1]昆明冶金研究院有限公司,云南昆明650031 [2]共伴生有色金属资源加压湿法冶金技术国家重点实验室,云南昆明650031 [3]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《热加工工艺》2023年第17期48-51,共4页Hot Working Technology

基　　金：云南省科技人才与平台计划项目(202105AD160020);重大科技专项计划项目(202102AB080015)。

摘　　要：运用XRD、金相显微镜、扫描电镜及力学性能测试,研究了添加不同含量的Sr、Y对A356铝合金显微组织和力学性能影响。结果表明,复合添加0.04%Sr和0.3%Y时,α-Al晶粒等效直径和二次枝晶间距值趋于稳定;抗拉强度和伸长率在此时达到最大值,分别为188.3MPa和7.2%。The effects of adding different contents of Sr and Y on the microstructure and mechanical properties of A356aluminum alloy were studied by using XRD,metallographic microscope,scanning electron microscope and mechanical properties test.The results show that when adding 0.04%Sr and 0.3%Y into the alloy,the equivalent diameter of α-Al grains and the value of secondary dendrite spacing tend to be stable.The tensile strength and elongation reach the maximum at this time,which are 188.3MPa and 7.2%,respectively.

关 键 词：A356铝合金 复合变质剂 微观组织 力学性能 

分 类 号：TG292[金属学及工艺—铸造]