研究論文
球状黒鉛鋳鉄におけるマグネシウム添加による反応性について
1960 年 32 巻 1 号 p. 31-40
詳細
1960 年 32 巻 1 号 p. 31-40
On the reactiveness caused by magnesium addition into molten pig iron, theoretical foundations are given to the experimental results by means of thermodynamic calculation in this paper.
Concerning the effect of the temperature of magnesium addition and those of magnesium content in the representative magnesium nodulizing alloys to the recovery of magnesium in cast iron, the decrease in vapor pressure and the rise in boiling point of copper magnesium, nickel-magnesium and silicon-magnesium alloys were calculated by means of the law of Raoult.
Furthermore, the effect of deoxidation and desulphurization as the chemical reactions caused by magnesium treatment were clarified experimentally, and then considered theoretically by means of the calculation of free energy of reactions.
It is confirmed from this investigation that it is necessary to retain a certain amount of residual magnesium greater than a critical value in order to nodulizing graphite in magnesium treated cast iron.
