摘要
根据Fe—C(sat)—P三元系熔体中a_c=1的性质,通过实验测定1400C°时P对碳溶解度的影响关系,结合已知的各一阶活度相互作用系数,求得C、P的二价活度相互作用系数,得到实验结果: (1) Nc=0.1903—0.7386N_P(N_P<0.07) (2) ρ_c^P=7.197;ρ_P^c=-2.707;ρ_c^(c·P)=-5.670;ρ_P^(c·P)=9.962 (3) lnγ_c=-0.3902+11.744N_c+12.000N_P-5.872N_c^2+7.197N_P^2-5.67N_c·N_P lnγp=-7.0833+7.5678N_P+12.000N_c-3.7839N_P^2-2.707N_c^2+9.962N_c·N_P(N_P<0.07)
According to ac=l in Fe-C_(sat)-P ternary system,the effect of P element on the solubility of carbon in this melt was determined expermentally. In combination with first-order interaction coefficient ε_i^j published, the experimental results are obtained as follows: 1. N_C=0.1903-0.7386N_p (N_p<0.07) 2. ρ_C^p=7.197, ρ_C^(C·p)=-5.670 ρ_p^c=-2.707, ρ_p^(c·p)=9.962 3. In_(γc)=-0.3902+11.744N_C+12N_p-5.872N^2_C+7.197N^2_p-5.67N_C·N_p In_(γp)=-7.0833+7.5678N_p+12N_C-3.7839N^2_p-2.707N^2_C+9.962N_C·N_p
