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 thermodynamic properties of Fe-C-Sn liquid solution have beenstudied by using the solubility method in the temperrature range 1300-1500℃ andby using the iso-tin-activity with silver bath at 1550℃. The results are summarizedas follows: 1. The relation between the solubility of C and the content of Sn in liquid Feare: 1300℃ [%C]_(sat)=4.65-0.086[%Sn] 1400℃ [%C]_(sat)=4.86-0.106[%Sn] 1500℃ [%C]_(sat)=5.13-0.131[%Sn] 2. The solubility of C dependence on the content of Sn and the temperature isobtained as [%C]_(sat)=8.41-0.101[%Sn]-5904(1/T) 3. The temperature dependence of interaction coefficients between Sn and C inC saturated liquid Fe are ε_C~(Sn)=-(27170)/T+20.07; e_(Sn)~C=-(51.29)/T+0.041 4. The temperature dependence of interaction coeffients between Sn and C inliquid Fe are derived as e_C~(Sn)=-(194)/T+0.151; e_(Sn)~C=-(1810)/T+1.39 5. The first and second order interaction coefficients between Sn and C in liq-uid Fe at 1550℃ are determined as e_(Sn)~C=0.12; e_C~(Sn)=0.016; γ_(Sn)~C=0
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