Al-5%Mg合金溶湯の酸化物生成に及ぼすキャスタブル耐火物バインダーの影響

抄録

  Molten Al-Mg alloys are known to have the tendency to generate large amounts of oxides in the casting process, but not necessarily all the time. Therefore, in this study, we investigated the phenomenon why large amounts of oxides are formed in molten Al-Mg alloys only in some cases, focusing on the binder used for castable refractories. The results obtained were as follows.

  In the case of castable refractories using alumina cement binder, the amount of oxide produced was relatively small. On the other hand, when phosphate binder was used, significantly large amounts of oxide were produced. One reason for this may be due to heterogeneous nucleation of magnesium phosphate formed in the early stage of the casting.