利用SEM和能谱分析，研究了其微观形貌的变化，并对球磨粉末的晶粒细化机理进行了一定的研究。
The morphology of the powders was studied by SEM and EDS, on which the discussion of grain refinement mechanisms is based.
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.
本文在实验室和工业试验的基础上对电磁振动和电磁搅拌的晶粒细化机理和效果进行了探讨，并获得满意的晶粒细化效果和消除偏析的作用。
In this paper, the effect of electromagnetic vibration and stirring on the fining of crystal grains and its mechanism are discussed based on the results from laboratory and industrial-scale tests.
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