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选用K4169Fe—Ni基高温合金，研究了向熔体中加入NixAlyTiz金属间化合物对合金冷凝后的晶粒尺寸、枝晶组织等凝固组织特征的影响结果表明，加入微量NixAlyTiz细化剂并控制合金液的均匀化处理过程可显著细化晶粒，将铸件整体晶粒细化至0、1—02mm；达到ASTM1—3级,同时、枝晶组织出现了由树枝晶向胞状晶的转变、并且NixAlyTiz细化剂的加入对合金的结晶特性及凝固组织无不良影响.
K4169Fe-Ni-based superalloy was used to study the effect of adding NixAlyTiz intermetallics to the melt on the characteristics of the solidified microstructure such as grain size and dendritic structure after condensation. The results show that adding a small amount of NixAlyTiz refiner and controlling the alloy liquid Of the homogenization process can significantly refine the grain, the entire grain refinement of the casting to 0,1-02mm; to ASTM1-3 level, at the same time, dendrites appear dendrite to cellular crystal transition, and NixAlyTiz The addition of refiner has no adverse effect on the crystallization characteristics and solidified structure of the alloy.