Ca对快速凝固Mg-6Zn合金薄带组织与性能的影响

张先满; 朱权利; 周涛

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Ca对快速凝固Mg-6Zn合金薄带组织与性能的影响
Effects of Ca Addition on Microstructure and Properties of Rapidly Solidified Mg-6Zn Alloy Ribbons
2010年30卷第8期页码：772-775
纸质出版日期： 2010 ，
DOI：

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[1]张先满,朱权利,周涛.Ca对快速凝固Mg-6Zn合金薄带组织与性能的影响[J].特种铸造及有色合金,2010,30(08):772-775+685-686.

Zhang Xianman1, Zhu Quanli1, Zhou Tao2. Effects of Ca Addition on Microstructure and Properties of Rapidly Solidified Mg-6Zn Alloy Ribbons[J]. Special Casting & Nonferrous Alloys, 2010,30(8):772-775.
[1]张先满,朱权利,周涛.Ca对快速凝固Mg-6Zn合金薄带组织与性能的影响[J].特种铸造及有色合金,2010,30(08):772-775+685-686. DOI：

Zhang Xianman1, Zhu Quanli1, Zhou Tao2. Effects of Ca Addition on Microstructure and Properties of Rapidly Solidified Mg-6Zn Alloy Ribbons[J]. Special Casting & Nonferrous Alloys, 2010,30(8):772-775. DOI：

摘要

采用双辊快速凝固技术制备了Mg-6Zn-xCa合金薄带

通过金相显微镜、扫描电镜、X射线衍射仪、差示扫描量热分析仪及显微硬度计研究了薄带的组织与性能特征。结果表明

不仅快速凝固显著细化晶粒和第二相

Ca也有助于合金微观组织的进一步细化;快速凝固Mg-6Zn合金的组织由过饱和固溶体a-Mg、Mg51Zn20

以及少量的Mg2Zn3和MgZn2组成。随着Ca的加入

Mg2Ca、Ca2Mg6Zn3和MgZn2相逐渐增多

而Mg2Zn3和Mg51Zn20却有所减少

因此

Ca的添加有助于提高快速凝固Mg-6Zn合金的热稳定性。

Abstract

Microstructure and properties of Mg-6Zn ribbons with different Ca addition prepared by two-roll rapid solidification were investigated by OM

SEM

XRD and DSC as well as micro-hardness tester. The results indicate that besides rapid solidification can greatly refine primary phase and secondary phase

Ca can give a help for refining further microstructure of the alloy too. The microstructure of the rapidly solidified Mg-6Zn alloy ribbons are composed of supersaturated α-Mg

Mg51Zn20 phase and a little Mg2Zn3 and MgZn2 phase. With increasing in Ca addition

Mg2Ca

Ca2Mg6Zn3 and MgZn2 phase are gradually increased with the decrease of Mg2Zn3 and Mg51Zn20 phase

which is beneficial to improving the thermal stability of the alloy.