一、氧化物的形态液态铝及铝合金的表面必然要形成铝的氧化物皮膜(Al_2O_3),在十分平静地进行熔化时,这个氧化铝将具有在化学上安定的保护皮膜的机能,然而在熔化过程中进行处理以及在铸造阶段,将作为一种非金属夹杂物而起作用。而且该皮膜对下面将要讲到的吸气也会有很大影响。 First, the oxide form Liquid aluminum and aluminum alloy surface is bound to the formation of aluminum oxide film (Al 2 O 3), in a very calm melting, the alumina will have a chemically stable protective film function, however in the Melting process and in the casting stage, will work as a non-metallic inclusions. And the film will have a big effect on the inspiratory as we’ll see below.