【摘要】 应用电镜及Ｘ射线衍射技术研究了含Ｃｒ及不含Ｃｒ的Ｆｅ－２８ａｔ．－％Ａｌ合金中相变结果表明，１０８０℃淬火过程中，Ｂ２结构热畴已开始形成；缓冷通过Ｂ２相区，沿晶界出现α相；对Ｆｅ－２８Ａｌ－５Ｃｒ合金还出现细小的ＣｒＮ相沉淀，板状合金中Ｂ２→Ｄ０３是一缓慢转变过程．更多还原

【Abstract】 The phase transformations in the Fe-28AI alloys with or without addition of Cr were studied by means of electron microscopy and X-ray diffraction techniques. The B2 antiphase domains (APD) has already been formed during quenching process from 1080℃.The Fe-enriched a-phase may precipitate along the grain boundaries in the alloys when cooling slowly through temperature range of just B2-phase occurred. In the Fe-28A1-5Cr alloy. the fine CrN-phase may also precipitate. The B2→D03 transformation was found to be a slow process in the sheet specimens.更多还原