1955 Volume 41 Issue 4 Pages 407-411
Oxygen has been commonly used in steel making, but in the production of cast iron scarcely used to improve the quality of molten iron except the some attempts of its use in cupola, because it has been believed excessively that oxygen is harmful element to cast iron.
But by blowing the adequate amount of oxygen into molten iron, some interesting results was obtained as follows.
(1) Carbon and silicon contents of cast iron could be controlled and its mechanical properties were improved.
(2) Oxygen content of cast iron treated by oxygen was not increased and the amount of impurities in cast iron-Ti, Cr, V and etc.-were decreased.
(3) Even the unsuitable pig irons for ductile cast iron were perfectly nodularized and elevated in the mechanical properties by magnesium treatment after the blow of oxygen into molten iron.