奥氏体耐热钢水蒸气氧化机理研究

项目名称： 奥氏体耐热钢水蒸气氧化机理研究

项目编号： No.51276133

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 能源与动力工程

项目作者： 赵钦新

作者单位： 西安交通大学

项目金额： 76万元

中文摘要： 本项目采用理论分析和实验研究相结合的方法对超临界、超超临界电站锅炉高温部件的水蒸气氧化机理进行系统的研究。首先，在理论分析的基础上建立了水蒸气、合金元素及氧化产物等物质的输运模型；然后，选取3种奥氏体耐热钢进行真实模拟的超临界压力和温度环境氧化实验，借助材料微观研究和分析的手段研究水蒸气和合金元素，离子，电子迁徙或传输规律,结合理论分析、热力学模拟和实验研究，研究水蒸气温度、压力、氧化时间等外因对材料氧化皮生成、剥离的影响机理。通过以上多学科交叉、多层次验证的研究方案，揭示水蒸气加速奥氏体耐热钢氧化进程的机理，提出控制奥氏体耐热钢和水蒸气界面氧化速率的评价指标，建立一套预测氧化速率和抑制氧化进程的方法。本研究将丰富奥氏体耐热钢水蒸气氧化过程的理论体系，为我国超临界火电机组长周期运行安全保障提供理论和技术支持。

中文关键词： 耐热钢；；蒸汽氧化行为；减缓途径；

英文摘要： A systematic study on steam oxidation mechanism of high temperature components is carried out for supercritical and ultra-supercritical utility boilers by theoretical analysis and experimental study. Firstly,the transportion models of water vapor,alloying elements and the oxidation products are established on the basis of theoretical analysis. Secondly,three kinds of austenitic heat-resisting steels in a real simulation environment of the supercritical pressure and temperature are selected to investigate the migration or transportation law of the steam ,alloying elements, ions and electrons with the aid of microscopic observation. Meanwhile,the influence mechanism of steam temperature,pressure and oxidation time on formation and stripping of scale are studied by theoretical analysis,thermodynamic simulation and experimental study. By the above multi-disciplinary,multi-level verification research program, we can reveal the mechanism of water vapor accelerating the oxidation of austenitic heat-resisting steels,and put forward water vapor oxidation rate evaluation index of the austenitic heat-resisting steels. Also we can propose a method for predicting the oxidation rate and inhibiting oxidation process. The research can enrich theoretical system of water vapor oxidation process for austenitic heat-resisting steel

英文关键词： Heat resistant steels；；Steam oxidation；Relieving approach；