中文摘要：

通过实验和有限元计算研究了MnS夹杂对钢中氢扩散行为的影响．结果表明：当MnS夹杂长度取向与氢渗透方向平行时，氢在钢中的表观扩散系数随MnS含量的增加而增加；当MnS夹杂长度取向与氢渗透方向垂直时，氢在钢中的表观扩散系数随MnS含量的增加而降低．对于具有扩散通道效应和陷阱效应的第二相，它对氢扩散的影响取决于扩散通道效应和陷阱效应的强弱以及第二相的形状、数量和取向．

英文摘要：

The effect of MnS inclusions on hydrogen diffusion in steel was investigated by experiment and finite element method （FEM）. The results show that with increasing MnS inclusion content the appearance diffusivity of hydrogen in steel increases when the elongated inclusions parallel to the direction of permeation and decreases when perpendicular to the direction of permeation. If the inclusions can both transport and trap hydrogen, the effect of inclusion on hydrogen diffusion in steel is determined by their strength of transportation and trap, density, figure and orientation.