热挤压速度对Mg-6Zn-0.5Gd-0.1Nd镁合金组织演变的影响研究  

Effect of Hot Extrusion Rate on Microstructure Evolution of Mg-6Zn-0.5Gd-0.1Nd Magnesium Alloy

作　　者：岳徐翔 Yue Xuxiang(College of Numerical Control Technology,Xinxiang Vocational and Technical College,Xinxiang Henan 453002,China)

机构地区：[1]新乡职业技术学院数控技术学院,河南新乡453002

出　　处：《山西冶金》2024年第6期11-12,15,共3页Shanxi Metallurgy

摘　　要：设计了一种Mg-6Zn-0.5Gd-0.1Nd镁合金,利用热挤压变形方法使其力学强度获得提高。通过实验测试手段研究挤压速度对其微观组织的影响。研究结果表明:在合金中形成了许多小尺寸再结晶晶粒与部分具有条状外形的组织;对合金进行挤压处理的过程中出现了动态再结晶现象;当增大挤压速率后,形成了更高比例的动态再结晶体组织;在挤压态合金内形成了以MgZn_(2)相为主的第二相,形成了Mg_(3)YZn_(6)相与低比例的Ca_(2)Mg_(6)Zn_(3)相。该研究为后续的冶金试样的力学性能研究奠定一定的理论基础。A kind of Mg-6Zn-0.5Gd-0.1Nd magnesium alloy was designed,and the mechanical strength was improved by hot extrusion.The effect of extrusion speed on microstructure was studied by means of experiment.The results show that many small size recrystallized grains and some structure with strip shape are formed in the alloy.The phenomenon of dynamic recrystallization occurred in the process of extrusion.When the extrusion rate was increased,a higher proportion of dynamic recrystallization structure was formed.In the extruded alloy,MgZn_(2) phase is formed,Mg_(3)YZn_(6) phase and Ca_(2)Mg_(6)Zn_(3) phase are formed.This study lays a theoretical foundation for the subsequent study of mechanical properties of metallurgical samples.

关 键 词：挤压速度 Mg-6Zn合金 显微组织 动态再结晶 

分 类 号：TG146.22[一般工业技术—材料科学与工程]