Effects of Ti, V, Cr, Mn, Co, Ni, Cu, Nb, Mo, and W on the Activity of Phosphorus in Liquid Iron

Abstract

The vapor pressure of phosphorus on liquid Fe-P-j (j=Ti, V, Cr, Mn, Co, Ni, Cu, Nb, Mo, or W) alloys has been measured by the transportation method at 1 673K.
The results obtained are treated by the model of interstitial solution proposed by J. CHIPMAN, and the effects of alloying elements on the activity coefficient of phosphorus in liquid iron are determined by assuming that all the alloying elements studied in the present work are substitutional.
The interaction parameters obtained in this work are summarized as follows:
ε^Tl_P=-11.0±2.1, ε^V_P=-8.67±2.79
ε^Cr_P=-9.34±2.26, ε^Mn_P=-7.17±1.16
ε^Co_P=-1.17±1.04, ε^Ni_P=-1.47±0.88
ε^Cu_P=-9.42±2.86, ε^Nb_P=-16.1±1.6
ε^Mo_P=-7.26±1.78, ε^W_P=-19.4±3.9