Masao Homma and Michio Shigihara
When oxygen was increased from the flake graphite iron, tensile strength was increased and toughness was decreased. On the other hand, if oxygen was decreased, irons became stronger and tougher.
The variety of cast iron was classified according to the oxygen amount in cast iron, and the reason why cast iron behaves differently in spite of the same chemical composition and cooling velocity was explained by the changes of cast iron properties caused by oxygen.
Because the activity of oxygen is decreased by carbon, the deoxidation of cast iron melt is more difficult than molten steel. The development of cast iron melting methods are discussed.
Please do not copy without permission.