热处理对不同基体表面镀铝相结构的影响  

Effects of Heat Treatments on Phase Structure of Electrodeposition Aluminum Coatings on Different Substrates

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,杭州310027 [2]中国工程物理研究院,四川绵阳621900

出　　处：《材料工程》2010年第2期1-5,共5页Journal of Materials Engineering

摘　　要：研究了热处理对不同钢铁基体表面镀铝相结构的影响。分别以Q235低碳钢,1Cr17铁素体不锈钢和201奥氏体不锈钢为基体,在摩尔比2∶1的酸性AlCl3-EMIC(1-甲基-3-乙基咪唑氯化物)室温熔盐中电沉积均匀致密的铝镀层,然后对试样在670℃下进行热处理,并用EDS,SEM和XRD等对热处理后的试样界面进行微观分析。结果表明,试样经热处理后,镀层与基体之间均发生互扩散形成合金层。Q235表面合金层呈舌状形貌向基体生长,而1Cr17和201表面的合金层平直。Q235上内外合金层为FeAl和Fe2Al5,并以Fe2Al5为主;而1Cr17的内外合金层为含Cr的Fe2Al5和FeAl3相;201不锈钢经短时间热处理可保留纯Al层,30min后主要由含Cr,Ni,Mn的Fe2Al5和FeAl3相组成,也形成少量的FeAl2和FeAl相。Effects of heat treatment on phase structure of electrodeposition aluminum coatings on different substrates was studied. The samples with dense aluminum coatings electrodeposited on Q235 mild steel,lCr17 ferrite stainless steel and 201 austenitic stainless steel from acid A1C13-EMIC （2 ： 1） room temperature molten salts was heat treated at 670℃. The interface microscopic analysis was carried by EDS,SEM and XRD. The results show that interdiffusion happens and the alloy layers form at the interface between aluminum coatings and the substrates after heat treated. Alloy layer grows like tongue to the suhstrate of Q235 which is flat on the substrate of 1Cr17 and 201 steel. The phases are FeAl and Fe2Al5 phases, mainly Fe2A15 on the internal and external alloy layers of Q235; but there are Fe2Al3 and FeAI3 phases containing Cr on the alloy layers of the 1Cr17 steel; there exists pure Al layer on the alloy layers of 201 steel heat treated after short time, the phases are mainly Fe2Al5 and FeAl3 phases containing Cr, Ni, Mn after heat treated for 30min,and there are a little FeAl2 and FeAl phases.

关 键 词：室温熔盐 镀铝 热处理 相结构 

分 类 号：TG154.5[金属学及工艺—热处理]