RSF法工艺参数对高硅铝合金显微组织及力学性能的影响  

Effect of Rapid Slurry Forming Process Parameters on Microstructure and Mechanical Properties of High Silicon Aluminum Alloy

作　　者：王连登[1] 耿斌 林益雄 江志伟 WANG Liandeng;GENG Bin;LIN Yi-xiong;JIANG Zhi-wei(College of Mechanical Engineering,Fuzhou University,Fuzhou 350108,Fujian,China)

机构地区：[1]福州大学机械工程及自动化学院,福建福州350116

出　　处：《铸造》2022年第8期950-955,共6页Foundry

摘　　要：通过OM、SEM、EDS测试手段,探究内冷法工艺参数对Al20Si3Cu1.6Mg1.4Ni合金组织及性能的影响。结果表明:710℃-1400 r/min-10%工艺参数下制备的半固态Al20Si3Cu1.6Mg1.4Ni合金,初生Si平均晶粒尺寸最小,力学性能最好。与液态浇注的合金相比,初生Si平均晶粒尺寸从62.8μm减小到24μm,布氏硬度从HB 106提升到HB131,抗拉强度从243 MPa提升到278 MPa,伸长率由1.93%提升到3.03%。The effects of internal cooling process parameters on the microstructure and properties of the Al20Si3Cu1.6Mg1.4Ni alloy were investigated by OM, SEM, EDS and XRD. The results showed that the semi-solid Al20Si3Cu1.6Mg1.4Ni alloy prepared at 710℃-1 400 r/min-10% process parameters had the smallest average grain size of primary Si and the best mechanical properties. Compared with the liquid casting alloy, the average grain size of the primary Si decreased from 62.8 μm to 24 μm, the Brinell hardness increased from HB106 to HB131, the tensile strength increased from 243 MPa to 278 MPa, and the elongation increased from 1.93 % to 3.03 %.

关 键 词：内冷搅拌 Al20Si3Cu1.6Mg1.4Ni合金 半固态 工艺参数 

分 类 号：TG249.9[金属学及工艺—铸造]