【摘要】 Ｔ Ｅ Ｍ 研究表明，低碳（００１～００３ｗ ｔ．％ Ｃ） Ｆｅ（１５，２５） Ｃｒ（４，５） Ａｌ合金经 １２００℃固溶处理后再于 ４７５～５４０℃时效时，碳化物迅速在晶界、位错等晶体缺陷处析出。晶界碳化物近于连续，晶界两侧形成析出带。析出相的衍射谱与 Ｃｒ２３ Ｃ６ 和 Ｃｒ７ Ｃ３ 基本吻合。在含０４ｗ ｔ．％ Ｙ 的 Ｆｅ Ｃｒ Ａｌ合金中，含钇相的衍射谱与六方α Ｆｅ１７ Ｙ２ 相的谱吻合，该相俘获碳原子的作用使合金在时效时不发生可察觉的碳化物析出。更多还原

【Abstract】 In FeCrAl alloys quenched from 1200℃ and then aged at 475～540℃,carbides rapidly precipitated at the crystal defects and precipitation zones formed around grain boundaries.The precipitates were identified to be Cr\-\{23\}C\-6 or Cr\-7C\-3,by electron diffraction analysis.In an alloy with 0 4wt.%Y,owing to carbon atoms were captured by Y\|Fe phase,which were identified to be hexagonal α\|Fe\-\{17\}Y\-2,no detectable carbide precipitation occured.更多还原