镧铈稀土对Al-Si-Mg铸造铝合金性能影响研究  

Research on the Effect of Lanthanum Cerium Rare Earth on the Properties of Al-Si-Mg Cast Aluminum Alloy

作　　者：张跃宏 张爽 丁茯 赵坤 徐曼 孙长亮 ZHANG Yuehong;ZHANG Shuang;DING Fu;ZHAO Kun;XU Man;SUN Changliang(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学分析测试中心,辽宁沈阳110142

出　　处：《沈阳化工大学学报》2024年第1期36-44,共9页Journal of Shenyang University of Chemical Technology

基　　金：辽宁省教育厅基本科研项目(LJKMZ20220799);辽宁省教育厅基本科研项目(LJKZ0453)。

摘　　要：以Al-Si-Mg铸造铝合金为研究对象,研究镧铈混合稀土及其成分含量对铸造铝合金Al-Si-Mg的显微组织和力学性能的影响,结果表明:加入镧、铈稀土后,铝合金组织对比普通的Al-Si-Mg铸造铝合金晶粒呈现明显细化状态,晶枝缩小;添加La、Ce稀土的Al-Si-Mg铝合金力学性能和硬度随稀土含量的增加而增大,但到一定程度后会下降,其中混合镧铈含量为0.1%(质量分数)时,铝合金力学性能最佳,可达到330 MPa的抗拉强度、HBW-93的硬度和4%的延伸率.Taking Al-Si-Mg casting aluminum alloy as the research object,the effects of lanthanum-cerium mixed rare earth and its component contents on the microstructure and mechanical properties of Al-Si-Mg cast aluminum alloy were investigated.The results showed the microstructure of aluminum alloy presented a significantly refined state of grain size compared to ordinary Al-Si-Mg cast aluminum alloy with lanthanum and cerium.The mechanical properties and hardness of Al-Si-Mg aluminum alloy improved with La and Ce rare earth added increased with the increase of rare earth content,but decreased to a certain extent.When the content of La and Ce is 0.1%(mass fraction),the mechanical properties of aluminum alloy are the best,and the tensile strength of 330 MPa,the hardness of HBW-93,and the elongation of 4%could be reached.

关 键 词：稀土铝合金 镧铈混合稀土 晶粒细化 力学性能 

分 类 号：TF845[冶金工程—有色金属冶金]