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本文以空位-溶质原子拖曳机制为基础,并考虑了空位、溶质原子和复合体三者的反应平衡及晶界平衡偏聚的作用,得到了溶质原子的非平衡晶界偏聚动力学方程。对硼在奥氏体中等温及连续冷却时所产生的非平衡晶界偏聚现象进行了理论计算,得到了与实验较为一致的结果。
Based on the mechanism of vacancy-solute atom drag and taking into account the reaction equilibrium of vacancies, solute atoms and complexes and the equilibrium segregation at the grain boundaries, the kinetic equation for the non-equilibrium grain boundary segregation of solute atoms is obtained. Theoretical studies on the segregation of non-equilibrium grain boundaries during the isothermal and continuous cooling of boron in austenite have been carried out. The results are in good agreement with the experimental results.