铁素体耐热钢材料的抗氧化性能评价  

Evaluation of High Temperature Oxidation Resistance of Ferritic Stainless Steels

作　　者：张颖 许明 ZHANG Ying;XU Ming(National Institute of Clean-and-Low-Carbon Energy,Beijing 102209,China)

机构地区：[1]北京低碳清洁能源研究院,北京102209

出　　处：《当代化工》2024年第11期2652-2655,共4页Contemporary Chemical Industry

基　　金：国家重点研发计划资助项目(项目编号:2017YFB0601900)。

摘　　要：采用不连续称重法测得了铁素体不锈钢441和Crofer22在800℃下热循环5次后的高温氧化动力学曲线,利用扫描电镜(SEM)、X射线衍射(XRD)和能谱分析(EDS)方法进行了氧化层厚度、氧化膜结构和成分组成的分析。结果表明:铁素体不锈钢441和Crofer22在800℃下热循环5次后,二者都表现出了优秀的抗氧化性能。氧化膜由外层致密的尖晶石结构和内层的金属氧化物组成,随着循环次数增加,外层尖晶石结构衍射峰增强,生成物增多变大。3层致密的氧化膜是其具有优异的抗高温氧化性能的主要原因。The kinetic curves of high temperature oxidation of ferritic stainless steel 441 and Crofer22 after five thermal cycles at 800℃were measured by discontinuous weighing method.The surface morphology,constituent and micro-structure of the oxidation scale was analyzed by using XRD,SEM and EDS techniques.Experimental results indicated that the ferritic stainless steel 441 and Crofer22 had excellent oxidation resistance after five thermal cycles at 800℃.The oxidation scale consisted of dense spinel structure in the outer layer and metal oxide in the inner layer.With the increase of cycle times,the diffraction peak of spinel structure in the outer layer increased and the products increased.Three layers of dense oxide scale were the main reason for its excellent high temperature oxidation resistance.

关 键 词：铁素体不锈钢 耐热不锈钢 氧化膜 抗氧化性 高温氧化动力学 耐热钢热循环 

分 类 号：TQ021.2[化学工程]