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罗马尼亚罗曼市一名专家发明了一种提高金属强度的新方法 ,就是在金属液体凝固的时候 ,使它处于振动状态。这是因为 ,正在凝固的金属如果它的晶体越小 ,那么它的强度越高 ;而受振动的金属在翻砂模中不会形成大的晶体 ,因而提高了强度。加工时使用的是一张装有 5ｋＷ电动机的振?
A specialist in Romanian city of Romania invented a new method of increasing the strength of metals by placing them in a vibrating state when they solidify. This is because the metal being solidified will have a higher strength if its crystal is smaller and the vibrating metal will not form large crystals in the sand mold, thus increasing its strength. Processing is used with a 5kW motor vibration?