湖南大学学报（自然科学版）Issue(7)：17-22,6.
Cu,Ce 对Al-7Si-0.35Mg 合金显微组织和力学性能的影响
Influence of Cu and Ce on the Microstructures and Mechanical Properties of Al-7Si-0.35Mg Alloys
摘要
Abstract
The influences of Cu and Ce on the microstructures and mechanical properties of Al-7Si-0. 35Mg alloys were investigated by using the control variables.The alloys underwent the same heat treat-ment:solution at 505 ℃ for ten hours.Then,the specimens were immediately cooled by water quenching. Finally,the samples were aged at 160 ℃ for 6 hours.The results have shown that Cu and Ce have a signif-icant influence on the improvement of the tensile strength and elongation of the heat treated alloys.After heat treatment,the tensile strength of Al-7Si-0.35Mg alloy can be increased by more than 50% with 3.4%~4.0% Cu,when the Ce content is certain.The tensile strengths of Al-7Si-0.35Mg alloys with 3.6% ~3.8% Cu increase above 390 MPa.Ce has an effective modification on the morphology of eutectic silicon. When the Cu content is certain,the elongations of alloys can be improved from 4.2% to 7.4% with 0.15%Ce.Adding excess Cu and Ce to Al-7Si-0.35Mg alloys,Al9 Ce2 Cu5 Si3 phases emerge.The results have il-lustrated that Al-7Si-0.35Mg alloys with 3.6% Cu and 0.15% Ce can attain good comprehensive tensile properties.关键词
微观组织/力学性能/Al-Si-Mg合金/热处理Key words
microstructure/mechanical properties/Al-Si-Mg alloy/heat treatments分类
机械制造引用本文复制引用
袁武华,孙莉..Cu,Ce 对Al-7Si-0.35Mg 合金显微组织和力学性能的影响[J].湖南大学学报（自然科学版）,2014,(7):17-22,6.基金项目
湖南省自然科学基金资助项目(06FJ3041) （06FJ3041）
