时效处理对2205双相不锈钢耐点蚀性能的影响  

EFFECT OF AGING TREATMENT ON THE PITTING CORROSION RESISTANCE OF 2205 DUPLEX STAINLESS STEEL

作　　者：范君伟[1] 何晨冲[1] 李杰[1] 严彪[1] 杜春风[1] 

机构地区：[1]上海市金属功能材料开发应用重点实验室,同济大学材料科学与工程学院,上海200092

出　　处：《上海金属》2011年第4期33-38,共6页Shanghai Metals

基　　金：国家973项目子课题(NO.2007CB613900);上海市科学技术发展基金(08DZ2201300);上海市纳米专项(0752nm004)资助项目

摘　　要：通过研究时效热处理对2205双相不锈钢耐点蚀性能的影响,发现590℃和650℃的时效处理降低了材料的耐点蚀性能,并且耐点蚀性能随着时效温度和时效时间的增加而降低;点蚀蚀孔倾向于在铁素体和奥氏体的相界处以及铁素体中的析出相附近形核长大。此外,通过TEM物相分析发现590℃时效析出相有R相,650℃时效析出相有R相和σ相。The effect of aging treatment on the pitting corrosion resistance of 2205 duplex stainless steel was studied.The pitting resistance of samples was reduced by aging treatment both at 590 ℃ and 650 ℃.The pits tended to nucleate and grow near the precipitations in the ferrite and α/γ phase boundary.In addition,through TEM phase analysis,the precipitations were found to be R phase in the 590 ℃ aging process while R phase and σ phase in the 650 ℃ aging.

关 键 词：2205 双相不锈钢 时效处理 点蚀 析出相 

分 类 号：TG401[金属学及工艺—焊接]