Fe-23Mn-2Al-V合金的高温氧化行为研究  

High-temperature Oxidation Behavior of Fe-23Mn-2Al-V Alloy

作　　者：王庆良[1] 张恒[2] 赵欣[2] 李勇[1] 

机构地区：[1]中国矿业大学材料科学与工程学院,江苏徐州221116 [2]宝钢特钢有限公司,上海200940

出　　处：《徐州工程学院学报（自然科学版）》2015年第3期23-29,共7页Journal of Xuzhou Institute of Technology(Natural Sciences Edition)

基　　金：国家科技支撑计划项目(2013BAEL3B00)

摘　　要：研究了Fe-23Mn-2Al-V低磁钢在不同氧化温度和不同氧化时间的氧化规律,分别使用金相显微镜、扫描电镜和电子探针对合金的氧化程度、氧化产物、氧化层结构、氧化层元素分布等进行深入分析.实验结果表明,较低氧化温度时,合金表面形成连续致密的氧化层,提高了合金的抗氧化性能.提高氧化温度和增加氧化时间,会加速合金的内氧化及晶间氧化,导致氧化层厚度和晶界氧化程度加重.高温氧化时,氧化层分外氧化层和内氧化层两个区域,内氧化层深度大于50μm,主要由α-Fe、ε-Fe、γ-Fe、MnAl2O4和AlN组成.热轧板表面微裂纹主要起源于表面严重的晶界氧化,并在热轧过程中开裂扩展.In this paper ,high temperature oxidation regulation of Fe‐23M n‐2Al‐V nonmagnetic steel is studied at different heating temperature and different holding time .T he oxidation behaviors of Fe‐23M n‐2Al‐V are simulated in the muffle furnace .The oxides scale ,structural features and redistribution of the alloy elements are investigated by optical microscopy ,scanning electron microscopy ,energy dispersive spec‐troscopy and scan electron probe ,respectively .The results show that the continuous and compact oxide layers inhibit oxidation at relatively low heating temperature .The intra‐oxidation and intergranular oxida‐tion would be obviously accelerated with the increase of oxidation temperature and time ,which results in the increase of oxide thickness and grain‐boundary oxidation .At high oxidation temperature ,the oxidation layer can be classified into two zones of the external‐oxidation and internal‐oxidation layers .The depth of internal‐oxidation is about 20~30μm .The phases of α‐Fe ,ε‐Fe ,γ‐Fe ,MnAl2 O4 and AlN are observed in in‐ternal‐oxidation layer .T he surface crack origin is formed in the seriously grain boundary oxidation ,and then the surface fine cracks are not developed but propagated in the process of hot rolling .

关 键 词：低磁钢 热轧板 高温氧化 氧化产物 

分 类 号：TG172.82[金属学及工艺—金属表面处理]