高温服役对离心铸造HP40转化管复杂穿壁组织的影响
Effect of high temperature service on the complex through-wall microstructure of centrifugally cast HP40 reformer tube
摘要：
铸造的重整炉管用于石油化工厂的氢气生产。由于制氢的条件，重整炉管暴露在高温下，导致微观结构内部的蠕变损伤。在这项研究中，两个不同的退役HP40合金转化管来自同一蒸汽重整装置进行了比较的显微组织特征进行的长度范围从毫米到微米。通过EBSD（电子背散射衍射）、EDS（能量色散X射线光谱）和PCA（主成分分析）进行的分析表明，两种管具有相似的显微组织成分，在晶界处存在奥氏体基体和M23C6、G相和M6C碳化物。即使两个管具有相似的微观结构，一个管由于其在蒸汽重整器单元内的定位而呈现具有更多微裂纹的区域，这可能表明该管比另一个管累积了更多的蠕变损伤。
英文摘要：
Centrifugally cast reformer tubes are used in petrochemical plants for hydrogen production. Due to the conditions of hydrogen production, reformer tubes are exposed to high temperature which causes creep damage inside the microstructure. In this study, two different ex-service HP40 alloy reformer tubes which come from the same steam reformer unit have been compared by microstructural characterisation performed at a range of length scales from mm to um. Analyses performed by EBSD (Electron Backscatter Diffraction), EDS (Energy Dispersive X-ray Spectroscopy) and PCA (Principal Component Analysis) show that both tubes have similar microstructural constituents, with the presence of an austenitic matrix and M23C6, G phase and M6C carbides at the grain boundaries. Even if both tubes have a similar microstructure, one tube due to it localisation inside the steam reformer unit presents a region with more micro cracks which may indicate that this tube have accumulated more creep damage than the other one.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
