对比研究了铸造工艺参数对镍基高温合金叶片表面晶粒度和晶粒均匀度的影响。

Effects of the casting technological factors on the size and uniformity of surface grains of turbine blade castings in ni based superalloy were studied by comparison of experimental results.

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选用K 18合金和纯金属镍及不同的面层细化料，通过实验对比研究了镍基高温合金叶片表面晶粒细化机理。

Surface grain refinement of turbine blades in Ni based superalloy K18 were studied by comparison of experimental results in different alloys and mold surface materials.

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