摘要
本文对不同含碳量的 Fe-20%Cr 合金进行了900℃静止大气气氛下的抗氧化实验,并测定了在此温度下的氧化动力学曲线.通过结合氧化膜表面微观形貌对氧化动力学曲线的分析,以及氧化膜下表层的微观分析等,指出随含碳量增加,氧化过程由良性的外部氧化转向恶性的内部氧化的过程及原因,并分析了合金中存在的两种主要类型的碳化物对氧化过程的影响.为高温磨损工况下材料的选择提供了一定的理论依椐.
The oxidation resistance behavior of Fe-20％Cr alloy containing 0. 82％～ 2. 94% carbon has been investigated in still air at 900℃.Through the analysis of scaling kinetics curves of the alloy,the morphology of the oxidized film on the surface and the EDAX of the subsurface under the oxidized film,it was shown that with increase of carbon content the oxidation mechanism transforms from external oxidation to internal oxidation resulting in increase in weight gain.The reason of the transformation was clarified in the paper.It was found that there were two main types of carbides in the alloy and their influence on oxidation process was discussed.The results of present paper has provided a useful basis for selection of materials with appropriate wear resistance under elevated temperatures.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
1990年第4期17-24,共8页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金
关键词
耐热合金
氧化稳定性
碳化物
oxidative stability
heat-resistant alloys
carbide
