Fluidity refers to the ability of the alloy liquid to fill the mold. The size of the fluidity determines whether the alloy can cast complex castings. The fluidity of eutectic alloys is best in aluminum alloys.
There are many factors that affect the fluidity, mainly the composition, temperature and solid phase particles of metal oxides, metal compounds and other pollutants in the alloy liquid, but the external fundamental factors are the pouring temperature and pouring pressure (commonly known as pouring head) the level of.
In actual production, when the alloy has been determined, in addition to strengthening the smelting process (refining and slag removal), it is also necessary to improve the casting process (sand mold permeability, metal mold exhaust and temperature), and without affecting On the premise of casting quality, the pouring temperature is increased to ensure the fluidity of the alloy.
