采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)分析钒合金在退火前后的微观组织结构.研究表明:铸态合金基体的晶格常数为0.293 8～0.294 3 nm,与纯V相比,晶格收缩了约2.8%,晶内主要析出相为盘状,该相为复杂FCC结构的富Ti型Ti-CNO相,晶格常数为0.423 4～0.428 8 nm,厚度约100 nm,其它两维尺寸达1～2μm,在晶界上则呈网状连续分布;合金中存在大量位错.约1 000℃,1 h退火后,合金基体晶格有所膨胀;组织发生了变化,出现了新的方形第二相,尺寸约为500 nm,原先晶内普遍存在的盘状第二相的尺寸减小.
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