Measurement on Interaction Parameter between Co and Al in Molten High Al Steel

Abstract

Nowadays Al is commonly used as deoxidizer and sometimes alloying element. On the other hand, due to the increase in scrap addition, suppress in the concentration of tramp element in molten steel during refining process becomes more important than ever. Co is one of the tramp elements in steel scrap and its content is increasing due to the increase in the production of Co materials world widely. As fundamentals to understand the thermodynamic behaviors of Co in the molten steel containing high Al, the interaction parameter between Co and Al has been measured in this study through a chemical equilibrium method. From the equilibrium composition of the Fe-CoAl alloy and Ag, the interaction parameter between Co and Al in molten Fe-CoAl alloy was determined as follows, ε Co Al = 7.3 ± 0.9 at 1 823 K, 0 < X Al Fe < 0.14 By converting the temperature and the reference state, the following values were also obtained, ε Co Al = 6.

Interaction Coefficient between Al and Sn in Molten High Al Steel

“…2) Tramp elements in steel are elements that are difficult to remove from steel during refining. [3][4][5][6][7][8][9][10][11] Tramp elements include Cu, Sn, Zn, Pb, Cd, As, and Bi, among others. These impurities can have an adverse effect on the physical property of steel.…”