摘要
采用超声振动制备了Mg-6Zn-3RE-1.4Y新型镁合金的半固态浆料,并对半固态浆料进行直接挤压铸造。研究了流变挤压铸造Mg-6Zn-3RE-1.4Y镁合金的组织和相组成。结果表明,Mg-6Zn-3RE-1.4Y合金流变挤压铸件组织中存在两种细小圆整但尺寸差异较大的α1-Mg和α2-Mg晶粒,α1-Mg平均晶粒尺寸和形状系数分别为22μm和0.74,α2-Mg为浆料中剩余液相形成的以球形为主的细小晶粒。合金的相组成主要为α-Mg基体、α-Zr以及沿晶界分布的Mg12Ce、Mg12La以及I-Mg3Zn6Y相。
The semi-solid slurry of a novel Mg-6Zn-3RE-1.4Yalloy was prepared by ultrasonic vibration（USV）.Then the slurry was formed by direct squeeze casting（SC）.The microstructure and phase constitutent of Mg-6Zn-3RE-1.4Yalloy produced by rheo-squeeze casting were investigated.The results show that there exist two-type fine and spherical particles（α1-Mg andα2-Mg）different in size.The average diameter and shape coefficient ofα1-Mg particles reach 22μm and 0.74,respectively,andα2-Mg grains are mainly spherical and fine particles formed from the remaining liquid of the slurry.The phase constitutent of the alloy are mainly not onlyα-Mg matrix、α-Zr but also Mg12Ce、Mg12La and I-Mg3Zn6 Y which distributed along the crystal interface.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2015年第1期39-43,共5页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51275183)
高等学校博士学科点专项科研基金资助项目(20120142110002)
