热处理对喷射沉积含Nd镁合金挤压坯组织性能不均匀性的影响  

Effects of Heat Treatment on Inhomogeneity of Microstructures and Mechanical Properties of As-extruded Magnesium Alloys Containing Nd Prepared by Spraying Deposition

作　　者：李振亮[1] 袁爱萍[1] 张婧[1] 吴朗[1] 徐玉磊[1] 孙昊[1] 

机构地区：[1]内蒙古科技大学材料与冶金学院

出　　处：《特种铸造及有色合金》2014年第10期1015-1019,共5页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(51364032)

摘　　要：以喷射沉积技术制备出了Mg-Al-Zn系合金沉积坯,然后对其挤压,并对其尺寸不均匀的挤压坯进行不同工艺的热处理,研究热处理工艺对其组织与性能不均匀性的影响。结果表明,热处理工艺可改善镁合金挤压坯组织及性能的不均匀性。经过热处理后挤压坯中的Al2Ca粒子数量、尺寸及分布的变化和Mg晶体轴比(c/a)的减少是改善镁合金组织与性能不均匀性的主要原因。The Mg-Al-Zn alloy billets were produced by spraying deposition method. As-extruded alloys prepared with uneven size were treated at different heat treatment processes to understand the inhomoge- neity of microstructures and mechanical properties. The results indicate that the heat treatment process can improve the inhomogeneity of microstructures and mechanical properties of as-extruded alloys. After heat treatment, both the changes of A12 Ca particles in number, size, distribution and the Mg axial-ratio reduction are responsible for the inhomogeneity improvement of microstructure and mechanical properties of as-extruded alloys.

关 键 词：喷射沉积 镁合金 热处理 不均匀性 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料]