材料期刊网

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.

The Zn-5Al-0.1Ce-xFe and Zn-5Al-yCe-0.1Fe alloys were prepared by adding Zn-Fe-Ce master alloys,which were melted in evacuated condition,into the Zn-Al bath.The influence of Fe and Ce contents on the microstructure and mechanical properties of these alloys were investigated.And their electrochemical properties were measured by the electrochemical workstation.Experimental results indicate that FeAl3Znx particles form in the Zn-5Al-0.1Ce alloy when Fe content is above 0.02％.With the increase of the Fe content,the amounts of the FeAls Znx phase and the proeutectic-η-Zn phase increase,which make the microstructure of the Zn-Al eutectic change from lamellar to dot.Less than 0.1％ Fe will improve the tensile strength of the Galfan alloy.With the increase of Fe content,the tensile strength of the alloy decreases slightly.The best comprehensive mechanical properties is obtained when 0.02％Fe is added in the alloy.And the corrosion resistance of the alloys increase when less than 0.04％Fe is added in to the Zn-5Al-0.1Ce alloy.Moreover,with the increase of Ce content,the mechanical properties of the Zn-5Al-yCe-0.1Fe alloys reduce,while its corrosion resistance changed slightly.Therefore,it is believed that the content of Fe and Ce in the liquid bath should be strictly controlled according to the requirement of the performance during in production process.