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在1300—1500℃范围内用溶解度法以及在1550℃用Ag浴等Sn活度分配平衡法分别对Fe-C-Sn溶液进行了研究,主要结果如下: (1)测得Fe液中碳的饱和溶解度〔％C〕饱与Sn含量〔％Sn〕的关系: 1300℃〔％C〕_(sat)=4.65-0.086〔％Sn〕 1400℃〔％C〕_(sat)=4.86-0.106〔％Sn〕 1550℃〔％C〕_(sat)=5.13-0.131〔％Sn〕 (2)〔％C〕_(sat)与〔％Sn〕和温度的关系: 〔％C〕_(sat)=8.41-0.101〔％Sn〕-5904(1/T) (3)按同一活度法测得碳饱和Fe液中Sn与碳的活度相互作用系数与温度的关系: ~*ε_C~(Sn)=-27170/T+20.07.~*e_C~(Sn)=-51.29/T+0.041 (4)求得炼钢温度范围内,Fe基稀溶液中Sn与碳的活度相互作用系数与温度的关系: e_C~(Sn)=-194/T+0.151.e_(Sn)~C=-1810/T+1.39 (5)用Ag浴等Sn活度分配平衡法测得1550℃ Fe液中Sn与碳的一阶、二阶活度相互作用系数: e_(Sn)~C=0.12 e_C~(Sn)=0.016 γ_(Sn)~C=0
The Fe-C-Sn solution was investigated by the solubility method at 1300-1500 ℃ and the Sn activity distribution equilibrium method at 1550 ℃ with Ag bath. The main results are as follows: (1) Saturated Solubility [% C] Saturated Relationship with Sn Content [% Sn]: 1300 ° C [% C] sat = 4.65-0.086 [% Sn] 1400 ° C% C sat sat = 4.86-0.106 % Sn] 1550 ° C [% C] sat 5.13-0.131% Sn The relationship between [% C] sat and% Sn and temperature: = 8.41-0.101 [% Sn] -5904 (1 / T) (3) According to the same activity method, the relationship between the interaction coefficient of activity of Sn and carbon in carbon- ) = - 27170 / T + 20.07. * E_C ~ (Sn) = - 51.29 / T + 0.041 (4) The activity coefficient of Sn and carbon in Fe-based dilute solution (Sn) = -194 / T + 0.151.e_ (Sn) ~ C = -1810 / T + 1.39 (5) The Sn activity distribution equilibrium method was used to measure the Sn The first-order and second-order activity interaction coefficients are: e_ (Sn) ~ C = 0.12 e_C ~ (Sn) = 0.016 γ_ (Sn) ~ C = 0