800H合金的高温抗氧化性能  

Oxidation resistance of alloy 800H at elevated temperature

作　　者：程晓农[1] 王荣荣[1] 李冬升[1] 戴起勋[1] 黄燕[1] 刘瑜[2] 陶亚平[2] 

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]江苏银环精密钢管股份有限公司,江苏宜兴214203

出　　处：《材料热处理学报》2012年第6期95-99,共5页Transactions of Materials and Heat Treatment

基　　金：江苏省科技成果转化项目(BA2010053);省级重点实验室开放课题(kjsmcx1004)

摘　　要：利用X射线衍射仪(XRD)、扫描电镜(SEM)和能谱仪(EDS)等,对800H合金高温氧化膜的增厚动力学、形貌及氧化物组成进行了分析。结果表明,700和800℃下形成的氧化膜相近,由(Cr,Fe)2O3和Mn-Cr氧化物组成;900℃时的氧化膜急剧增厚,里层依然是Cr2O3,中间层则是Cr-Fe-Mn氧化物,外层为富Ti的氧化物。通过热力学和动力学计算,提出了800H合金氧化膜形成的模型,发现TiN的存在改变了氧化膜的结构。Oxidation kinetics, morphology and constitution of oxides formed on alloy 800 H at high temperature were analyzed by means of X-ray diffraction, scanning electron microscopy and energy dispersive spectroscopy. The results show that the scales formed at 700 ℃ are similar to that formed at 800 ℃ , mainly composed of （Cr,Fe）2O3 and Mn-Cr oxides. The scales formed at 900 ℃ are much thicker with three layers ： an inner layer of Cr2O3 , an interlayer of Cr-Fe-Mn oxides and an outer layer of Ti-riched oxides. The oxidation of 800H alloy is simulated by thermodynamics and kinetics calculation, and TiN particles are considered to change the scales structure.

关 键 词：800H合金 高温氧化 氧化膜 热力学计算 

分 类 号：TG132.3[一般工业技术—材料科学与工程]