, the solubility decreases with increase of intermediate annealing temperature, and the alloying elements added to the two alloys mainly exists in the Laves precipitates.

• 通过对合金基体微观组织结构的研究，发现Nb在与Fe、Cr共存时，Nb于基体中的固溶度发生异常改变，即随退火温度升高在基体中的固溶度减少,两种合金的合金元素Fe、Cr、Nb主要存在于Laves沉淀相中；