Abstract
As the further study of the previous work, (Tetu-to-Hagané, Vol. 43, 1957, p. 790) the effect of alloying element on the equilibrium of carbon and oxygen in molten iron saturated with carbon was investigated for liquid alloys containing up to 5.2% Si, 20% Cr and 40% Mn at 1400°C 1500°C and 1600°C, respectively.
It was disclosed that the addition of silicon decreased the concentration of carbon and oxygen in molten iron, and the addition of Cr or Mn increased them.
From these data, the following results were obtained.
1) The effect of an alloying element on the solubility of graphite.
These functions were independent of temperature
where
NCC=mole fraction of carbon in carbon-saturated iron
NXC=mole fraction of carbon in Fe-C-X liquid alloy saturated with carbon
NX=mole fraction of alloying element dissolved in liquid alloy
2) For the interaction parameter of oxygen and carbon in molten iron e(C)O, the following value was obtained approximately.
