Fe和Ce含量对Galfan合金力学性能及耐蚀性的影响

发布时间：2018-05-08 19:27

本文选题：Zn-Al-RE合金 + 显微组织　；参考：《材料导报》2017年04期

【摘要】：将真空熔炼的Zn-Fe-Ce中间合金加入到Zn-Al熔池中,制备Zn-5Al-0.1Ce-xFe和Zn-5Al-yCe-0.1Fe合金,分析了Fe和Ce含量对合金显微组织及力学性能的影响,并使用电化学工作站测试了合金的电化学性能。结果表明,在Zn-5Al-0.1Ce合金中Fe含量大于0.02%后会形成颗粒状的FeAl3Znx相。随着Fe含量的增加,FeAl3Znx相和先共晶的η-Zn相增加,Zn-Al共晶组织由层片状向点状转变。添加0.1%以下的Fe可提高Galfan合金的抗拉强度。但随着Fe含量的增加,合金的抗拉强度略有降低,Zn-5Al-0.1Ce-0.02Fe合金的综合力学性能最好。添加0.04%以下的Fe会提升合金耐蚀性。此外,随着Ce含量的增加,Zn-5Al-yCe-0.1Fe合金的抗拉强度有所降低,耐蚀性变化不明显。因此,在生产中需要根据镀层性能要求,严格控制合金液中的Fe和Ce含量。
[Abstract]:Zn-5Al-0.1Ce-xFe and Zn-5Al-yCe-0.1Fe alloys were prepared by adding vacuum melting Zn-Fe-Ce master alloy into Zn-Al pool. The effect of Fe and ce content on microstructure and mechanical properties of the alloy was analyzed. The electrochemical properties of the alloy were tested by electrochemical workstation. The results show that granular FeAl3Znx phase can be formed when Fe content is more than 0.02% in Zn-5Al-0.1Ce alloy. With the increase of Fe content, FeAl3Znx phase and 畏 -Zn phase of proeutectic increase, the structure of Zn-Al eutectic changes from lamellar to point-like. The tensile strength of Galfan alloy can be improved by adding less than 0.1% Fe. However, with the increase of Fe content, the tensile strength of Zn-5Al-0.1Ce-0.02Fe alloy decreases slightly. The comprehensive mechanical properties of the alloy are the best. The corrosion resistance of the alloy was improved by adding less than 0.04% Fe. In addition, the tensile strength of Zn-5Al-YCe-0.1Fe alloy decreases with the increase of ce content, but the corrosion resistance of Zn-5Al-yCe-0.1Fe alloy does not change obviously. Therefore, the content of Fe and ce in alloy solution should be strictly controlled according to the requirements of coating properties.
【作者单位】：常州大学材料科学与工程学院江苏省材料表面科学与技术重点实验室;常州大学光伏科学与工程协同创新中心;
【基金】：国家自然科学基金(51201023;51271041)
【分类号】：TG174.4

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