论文部分内容阅读
研究了Fe15Cr和Fe20Cr合金在900～1000℃含水蒸气的氧气中的氧化行为在氧化初期，由于形成富铬的保护性氧化膜，FeCr表现为较慢的钝性氧化行为但随之形成富铁氧化层，因而表现为快速的活性氧化行为这种转变对气氛中的水蒸气含量、温度以及铬含量都非常敏感水蒸气含量越高，出现活性氧化的时间越早；在湿氧中温度升高或减少铬含量也有利于活性氧化的出现用金相、X-射线衍射、SEM和EPMA观察分析了氧化产物提出了水蒸气加速Fe－Cr合金高温氧化的作用机制
The oxidation behavior of Fe15Cr and Fe20Cr alloys in oxygen-containing steam at 900 ~ 1000 ℃ was studied. At the initial oxidation stage, FeCr showed slower passive oxidation due to the formation of a chromium-rich protective oxide film, followed by the formation of iron-rich oxidation Layer, thus showing a rapid activity of the oxidation behavior of this transition on the atmosphere of water vapor content, temperature and chromium content are very sensitive to the higher the content of water vapor, the more active oxidation occurs; wet oxygen in the temperature rise or Reduce the chromium content is also conducive to the emergence of reactive oxidation Metallographic observation, X-ray diffraction, SEM and EPMA analysis of the oxidation products proposed water vapor accelerates the oxidation mechanism of Fe-Cr alloy at high temperature