一种第二相析出-温度-时间曲线计算模型的建立
发布时间：2019-03-15 06:33
【摘要】：基于经典形核长大理论和Johnson-Mehl-Avrami方程,假定过饱和沉淀的球形第二相分子式为(M)1xM2vM31-x-v(C)yN1-y,采用平均扩散速率表征合金原子对第二相形核长大过程影响的思想,建立了计算第二相析出-温度-时间(PTT)曲线的模型。基于Adrian模型提出计算多元系全固溶温度的方法,针对Fe-0.09C-0.011Ti-0.03V-0.025Nb(质量分数,%)钢计算得到的铁素体区PTT曲线呈典型的"C"形,得到的最快析出温度为628℃,其值与实验结果吻合。本模型计算效率高,计算析出相体积自由能变化时无需求取复合相的溶解度公式;适用性高,适用于不同基体中不同类型析出相PTT曲线的计算。
[Abstract]:Based on the classical nucleation growth theory and Johnson-Mehl-Avrami equation, it is assumed that the spherical second phase molecular formula of supersaturated precipitation is (M) 1xM2vM31-x-v (C) yN1-y,. The average diffusion rate is used to characterize the influence of alloy atoms on the nucleation and growth process of the second phase. A model for calculating the second phase precipitation-temperature-time (PTT) curve is established. Based on the Adrian model, a method for calculating the total solid solution temperature of multicomponent system is proposed. The PTT curve of ferrite region obtained from the calculation of Fe-0.09C-0.011Ti-0.03V-0.025Nb (mass fraction,%) steel is in a typical "C" shape. The maximum precipitation temperature is 628 鈩，
本文编号：2440384
[Abstract]:Based on the classical nucleation growth theory and Johnson-Mehl-Avrami equation, it is assumed that the spherical second phase molecular formula of supersaturated precipitation is (M) 1xM2vM31-x-v (C) yN1-y,. The average diffusion rate is used to characterize the influence of alloy atoms on the nucleation and growth process of the second phase. A model for calculating the second phase precipitation-temperature-time (PTT) curve is established. Based on the Adrian model, a method for calculating the total solid solution temperature of multicomponent system is proposed. The PTT curve of ferrite region obtained from the calculation of Fe-0.09C-0.011Ti-0.03V-0.025Nb (mass fraction,%) steel is in a typical "C" shape. The maximum precipitation temperature is 628 鈩，
本文编号：2440384
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