流变挤压铸造Mg-6Zn-3RE-1.4Y镁合金的组织

方晓刚; 吴树森; 赵立; 吕书林; 安萍

doi:10.15980/j.tzzz.2015.01.012

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流变挤压铸造Mg-6Zn-3RE-1.4Y镁合金的组织
Microstructure of Mg-6Zn-3RE-1.4Y Alloy Produced by Rheo-Squeeze Casting
2015年35卷第1期页码：39-43
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.01.012

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[1]方晓刚,吴树森,赵立,吕书林,安萍.流变挤压铸造Mg-6Zn-3RE-1.4Y镁合金的组织[J].特种铸造及有色合金,2015,35(01):39-43.

Fang Xiaogang, Wu shusen, Zhao Li, et al. Microstructure of Mg-6Zn-3RE-1.4Y Alloy Produced by Rheo-Squeeze Casting[J]. Special Casting & Nonferrous Alloys, 2015,35(1):39-43.
[1]方晓刚,吴树森,赵立,吕书林,安萍.流变挤压铸造Mg-6Zn-3RE-1.4Y镁合金的组织[J].特种铸造及有色合金,2015,35(01):39-43. DOI： 10.15980/j.tzzz.2015.01.012.

Fang Xiaogang, Wu shusen, Zhao Li, et al. Microstructure of Mg-6Zn-3RE-1.4Y Alloy Produced by Rheo-Squeeze Casting[J]. Special Casting & Nonferrous Alloys, 2015,35(1):39-43. DOI： 10.15980/j.tzzz.2015.01.012.

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。

Abstract

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.