A study of breakaway oxidation of 9Cr–1Mo steel in a Hot CO2 atmosphere using Raman spectroscopy
A study of breakaway oxidation of 9Cr–1Mo steel in a Hot CO2 atmosphere using Raman spectroscopy
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利用拉曼光谱研究 9Cr-1Mo 钢在热 CO2 气氛中的断裂氧化
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
P. Flewitt
中科院分区：
文献类型：
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作者：
C. Liu;P. Heard;S. J. Greenwell;P. Flewitt
观察了铁素体9Cr-1Mo钢高温高压下的氧化膜和母材的显微组织，探讨了高温高压下暴露于CO2气体环境中的氧化和渗碳机理。分析了在以二氧化碳为主的冷却气体中，在580℃下氧化超过165,000小时的9Cr-1Mo钢的实验样品。为了阐明氧化的特征，用扫描拉曼光谱分析了金属/氧化物界面附近的氧化物。发现碳沉积在尖晶石层中。采用光学显微镜、扫描电子显微镜和能谱分析相结合的方法，对合金的显微组织和元素化学成分分布进行了检测和分析。结果与理解氧化和渗碳的机理有关，旨在支持延长由这种钢制造的部件的使用寿命。
Abstract The microstructure of the oxide scale and parent metal in ferritic 9Cr–1Mo steel was observed to explore the oxidation and carburisation mechanisms upon exposure to a CO2 gas environment at high temperature and high pressure. An experimental 9Cr–1Mo steel sample that had been oxidised at 580 °C for more than 165,000 hrs in coolant gas consisting primarily of CO2 was analysed. To elucidate the oxidation characterisation, scanning Raman spectrometry was used to analyse the oxide close to the metal/oxide interface. Carbon was found to be deposited in the spinel layer. The microstructure and the distribution of elemental chemical composition were examined and analysed using optical and scanning electron microscopy combined with energy dispersive X-ray analysis. The results are discussed with relation to understanding the mechanisms of oxidation and carburisation which aim to underpin extension of the service life of components fabricated from this steel.