材料工程2017，Vol.45Issue(6)：17-23,7.DOI:10.11868/j.issn.1001-4381.2015.000920
半固态触变挤压对ZA27合金组织和力学性能的影响
Effect of Semi-solid Thixo-extrusion on Microstructures and Mechanical Properties of ZA27 Alloy
摘要
Abstract
Through comparative study with normal casting, the effects of semi-solid thixo-extrusion on microstructures and mechanical properties with modification treatment and heat treatment of ZA27 alloys were studied.The results show that the density of semi-solid thixo-extrusion ZA27 alloy increases by 3% compared to the one obtained by normal casting, fine spherical uniform microstructure is obtained by Sc modification treatment or semi-solid thixo-extrusion, and the best roundness of the globular grains is obtained by Sc modification combined with semi-solid thixo-extrusion.The microstructure of ZA27 alloy by semi-solid thixo-extrusion combined with T6 heat treatment is composed of small α primary phase and (α+η) eutectoid phase, which shows that semi-solid thixo-extrusion can promote the dissolution of ε phase and reduce (β+η+ε) ternary eutectic content.The mechanical properties test indicates that the tensile strength, elongation and Brinell hardness of the ZA27 alloy by semi-solid thixo-extrusion, and after Sc modification and T6 heat treatment, are up to 586.01MPa, 17.57% and 171HB respectively.关键词
ZA27合金/Sc变质/半固态触变挤压/微观组织/力学性能Key words
ZA27 alloy/Sc modification/semi-solid thixo-extrusion/microstructure/mechanical property分类
矿业与冶金引用本文复制引用
刘占勇,左孝青,钟子龙,李威威..半固态触变挤压对ZA27合金组织和力学性能的影响[J].材料工程,2017,45(6):17-23,7.基金项目
国家自然科学基金资助项目(51164019) （51164019）
云南省应用基础研究重点项目资助(2010CC004) （2010CC004）
昆明理工大学创新团队项目资助(2010-2015) （2010-2015）
