热处理对201不锈钢与铝镀层界面组织转变的影响  

Effects of Heat Treatment on Phase Transformation of Interface between Aluminum Coating and 201 Stainless Steel Substrate

作　　者：李岩[1] 凌国平[1] 刘柯钊[2] 陈长安[2] 张桂凯[2] 

机构地区：[1]浙江大学材料与化学工程学院,浙江杭州310027 [2]中国工程物理研究院,四川绵阳621900

出　　处：《材料科学与工程学报》2009年第3期332-336,共5页Journal of Materials Science and Engineering

摘　　要：本研究以201奥氏体不锈钢为基体,在酸性的AlCl3-EMIC(2∶1)室温熔盐中电沉积均匀致密的铝镀层,然后在570℃～680℃下对试样进行2min～100h的热处理,用SEM、EDS及XRD对热处理后的试样界面进行微观分析。结果表明,201奥氏体不锈钢表面铝镀层在570℃热处理时,界面未形成合金层;经过630℃～680℃不同时间的低温热处理,可以获得含Cr、Ni、Mn合金元素的Fe-Al合金层;670℃下,随热处理时间延长,表面逐渐由Al向低铝含量的FeAl、FeAl转变,并在界面上形成FeAl合金层。Effects of heat treatment on phase transformation of interface between aluminum coating and 201 stainless steel substrate was studied. At first, the dense, uniform aluminum coating was electrodeposited on 201 austenitic stainless steel from acid A1CI3-EMIC （2 ： 1） room temperature molten salts, then the samples were heat treated for 2min- 100h at 570℃ ～680℃. The interface microscopic analysis was carried by SEM, EDS and XRD. The results show that heat treated at 570℃, alloy layer does not form at the interface between 201 austenitic stainless steel and alumium coating; heat treated at 630℃ ～680℃ under different times Fe-Al alloy layer containing Cr, Ni, Mn alloy element forms at the interface; with the increase of heat treatment time at 670℃, Al transforms into FeAl3, Fe2Al5 with lower aluminum content in the surface and the FeAl alloy layer forms at the interface just between the coating and the substrate.

关 键 词：室温熔盐 热处理 相转变 合金层 

分 类 号：TG15[金属学及工艺—热处理]