Effects of Na2B4O7 on the Microstructure and Properties of Magnesium Alloy Wastes

Gao Hongtao  Wu Guohua  Ding Wenjiang  Zhu Yanping

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Effects of Na₂B₄O₇ on the Microstructure and Properties of Magnesium Alloy Wastes
Issue 2, Pages: 65-67(2005)
Published： 2005 ，
DOI：

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[1]高洪涛,吴国华,丁文江,朱燕萍.Na_2B_4O_7对镁合金旧料组织和性能的影响[J].特种铸造及有色合金,2005(02):65-67+61.

Gao Hongtao Wu Guohua Ding Wenjiang Zhu Yanping. Effects of Na₂B₄O₇ on the Microstructure and Properties of Magnesium Alloy Wastes. [J]. Special Casting & Nonferrous Alloys (2):65-67(2005)
[1]高洪涛,吴国华,丁文江,朱燕萍.Na_2B_4O_7对镁合金旧料组织和性能的影响[J].特种铸造及有色合金,2005(02):65-67+61. DOI：

Gao Hongtao Wu Guohua Ding Wenjiang Zhu Yanping. Effects of Na₂B₄O₇ on the Microstructure and Properties of Magnesium Alloy Wastes. [J]. Special Casting & Nonferrous Alloys (2):65-67(2005) DOI：

摘要

利用等离子发射光谱仪、电镜、X衍射、万能材料试验机、腐蚀试验等手段研究了不同Na2 B4O7含量的熔剂对镁合金废旧料的力学性能、相组成、断口形貌以及腐蚀行为的影响。研究表明

使用含Na2 B4O7的熔剂可以使镁合金旧料中Fe的质量分数降低到 0 .0 0 4%以下

同时提高材料的抗拉强度和伸长率。腐蚀试验表明含Na2 B4O7的质量分数为 2 0 %的熔剂可以使材料的腐蚀速率从 15 .1mg·cm-2 ·d-1降低到 0 .4mg·cm-2 ·d-1。电镜观察和X衍射表明

净化处理对断口形貌和相组成没有明显影响。最后分析了Na2 B4O7除铁的机理

认为Fe与B形成某种化合物沉淀下来是主要原因

Abstract

Effects of the fluxes with different Na

contents on the mechanical properties

phase constituent

fracture morphology and corrosion performance of magnesium alloy wastes have been studied by ICP spectroscopy

SEM

XRD

material testing machine and corrosion test.It was found that the Fe in the wastes can be decreased to below 0.004% and the tensile strength and elongation of the alloy can be improved using the fluxes with Na

.Corrosion test indicated that the corrosion rate of the alloy can be decreased to 0.3 mg·cm

-2

·d

-1

by the flux with 20% Na

.The SEM and XRD results showed that purification treatment has a slightly effect on the fracture morphology and phase constituent.It was believed that the Fe removal by Na

was contributed to the reaction between Fe with B to form a deposited compound.