铝及铝合金产品中的气孔、疏松等缺陷主要是其中的气体造成的,而在所含的气体中氢占70%以上,因此,如何减少铝铸造时熔体中的氢就是铸造生产主要任务之一。除氢处理实际上是最大限度地减少熔体中的氢,是除不尽的,在现有的技术条件下,最大的除氢率也不能超过70%。铝熔体的除氢效率决定于许多因素,除氢方法也很多。超声波除气是其中的一种,也 Aluminum and aluminum alloy products, such as porosity, porosity and other defects is mainly caused by one of the gas, and in the gas contained in more than 70% of hydrogen, therefore, how to reduce the molten aluminum casting aluminum is the main task of casting production one. In addition to the fact that hydrogen treatment is to minimize the hydrogen in the melt, the maximum hydrogen removal rate can not exceed 70% under existing technical conditions. The hydrogen removal efficiency of aluminum melt depends on many factors, and there are many ways to remove hydrogen. Ultrasonic degassing is one of them, too