溶融 Fe-C-Si および Fe-C-Mn 合金における相互拡散

概要

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Ternary isothermal diffusion was studied in molten Fe-C-Si and Fe-C-Mn alloy which are of practical importance in steelmaking process. Two kinds of experimentation were carried out at 1550℃ by the diffusion couple method ; the first one is based on Fujita's solution, the second on Boltzmann-Matano's solution for ternary system. The results are summarized as follows : 1) By the method I in Fe-C-Si system (0.30∿0.88%C, 0∿0.77%Si) D_<CC>=2.4±0.27, D_<CSi>=-0.03±0.19, D_<SiC>=0.3±0.13, D_<SiSi>=1.5±0.23. (×10^<-4>cm^2/s) 2) By the method II in Fe-C-Si system (0.48∿0.63%C, 0.08∿0.55%Si) D_<CC>=1.14∿1.86, D_<CSi>=0.01∿0.50, D_<SiC>=-0.21∿0.11, D_<SiSi>=0.33∿0.97. (×10^<-4>cm^2/s) 3) By the method II in Fe-C-Mn system (2.96∿3.22%C, 2.47∿3.69%Mn) D_<CC>=1.03∿2.58, D_<CMn>=-1.97∿0.55, D_<MnC>=-0.81∿0.15, D_<MnMn>=0.51∿1.93. (×10^<-4>cm^2/s) Discussion shows that, due to the experimental limitation, the values measured by the method I are larger than those obtained by the method II. The results also satisfy the general properties of diffusion path.
1980-02-01