Nd对Mg/Al-20Si液固复合铸造界面组织及性能的影响

冯世鹏; 陈翌庆; 刘一; 朱子昂; 周锐

doi:10.15980/j.tzzz.2018.07.017

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Nd对Mg/Al-20Si液固复合铸造界面组织及性能的影响
Effects of Nd on Microstructure and Properties of Mg/Al-20Si Liquid-solid Compound Casting
2018年38卷第7期页码：755-759
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.07.017

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[1]冯世鹏,陈翌庆,刘一,朱子昂,周锐.Nd对Mg/Al-20Si液固复合铸造界面组织及性能的影响[J].特种铸造及有色合金,2018,38(07):755-759.

Feng Shipeng, Chen Yiqing, Liu Yi, et al. Effects of Nd on Microstructure and Properties of Mg/Al-20Si Liquid-solid Compound Casting[J]. Special Casting & Nonferrous Alloys, 2018,38(7):755-759.
[1]冯世鹏,陈翌庆,刘一,朱子昂,周锐.Nd对Mg/Al-20Si液固复合铸造界面组织及性能的影响[J].特种铸造及有色合金,2018,38(07):755-759. DOI： 10.15980/j.tzzz.2018.07.017.

Feng Shipeng, Chen Yiqing, Liu Yi, et al. Effects of Nd on Microstructure and Properties of Mg/Al-20Si Liquid-solid Compound Casting[J]. Special Casting & Nonferrous Alloys, 2018,38(7):755-759. DOI： 10.15980/j.tzzz.2018.07.017.

摘要

采用锌酸盐浸锌工艺、QJ207钎剂处理工艺对铝合金表面进行处理

发现两种工艺均可以有效去除铝合金表面氧化膜

提高液态镁在固态铝合金表面的润湿性。使用不同含Nd量的镁合金进行镁/铝合金液固复合铸造

并采用SEM、XRD、EPMA、力学试验机、显微硬度仪等方法对焊接界面组织及性能进行分析

发现随着镁合金中Nd含量的增加

复合界面处开始出现Al-Nd相

其抑制了金属间化合物的产生

且Al-Nd相逐渐由针状Al11Nd3相向块状Al2Nd相转变。当Nd含量为1%时

获得最大剪切强度为22.28 MPa。

Abstract

The surface of aluminum alloy was treated by zincate process and QJ207 brazing process.The results reveal that both methods can remove effectively the oxide film and improve the wettability of liquid magnesium on the surface of solid aluminum alloy.The interfacial structure and properties of Mg/Al-20 Si bi-metal liquid-solid compound casting with different rare earth Nd contents in magnesium alloy were analyzed by means of SEM

XRD

EPMA

mechanical testing machine and microhardness tester.With the increase of Nd contents

Al-Nd phase is formed in the interface of composite materials

which inhibits the production of intermetallic compounds

and Al-Nd phase is gradually transformed from acicular Al11 Nd3 phase to blocky Al2 Nd phase.When content of Nd reaches 1%

the maximum shear strength of 22.28 MPa can be obtained.