铸造2017，Vol.66Issue(4)：367-371,5.
挤压铸造对过共晶Al-Si-Cu-Mg合金组织与性能的影响
Effect of Squeeze Casting on Microstructures and Mechanical Properties of Hypereutectic Al-Si-Cu-Mg Alloy
摘要
Abstract
Microstructure and mechanical properties of Al-17.5Si-4Cu-0.5Mg-0.1Mn alloy with different applied solidification pressures have been investigated.With the pressures applied during solidification,the microstructure of the alloy showed significant change,and the mechanical properties of the alloy were improved remarkably.As the squeeze pressure increased in a certain range,the α (Al) dendrites was obviously refined and the dendrite arm spacing was decreased,the size ofeutectic Si and A12Cu phases reduced significantly.When the squeeze pressure reaches 850 MPa,the microstructure of alloy was coarsened,the mechanical properties of the alloy showed little reduction,with the increasing of casting specific pressure the elongation of alloy was increased.The proper specific pressure is 676 MPa for Al-17.5 Si-4Cu-0.5Mg-0.1Mn alloy.关键词
挤压铸造/过共晶Al-Si合金/微观组织/力学性能Key words
squeeze casting/hypereutectic Al-Si alloy/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
李润霞,刘兰吉,史原脊,孙菊,张立军,郑黎,于宝义..挤压铸造对过共晶Al-Si-Cu-Mg合金组织与性能的影响[J].铸造,2017,66(4):367-371,5.基金项目
国家自然科学基金(51674168) （51674168）
沈阳市科技创新专项(F14-231-1-23). （F14-231-1-23）
