具有高能表面的稀土化合物质点，在焊接冶金过程中领先析出于过热液相内，充当了包裹式碳化物颗粒的非自发晶核核心。
During welding metallurgic process, re compound with surface energy separated out previously from superheating melted metal, and acted as the crystallizing nucleus of compound carbides.
本文研究了受热液体在垂直管内向上流动时的过热汽化过程。
In this paper the superheating and vaporization process which occurs in upwards flow of heating liquid in a vertical tube is studied.
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