The calculated results show that the main reason why the g as carburizing process is accelerated is due to the obvious increase in the diff usion coefficient and transfer coefficient of carbon resulted from the addition of RE.

• 稀土元素加速渗碳过程的主要原因是增加了碳在奥氏体中的扩散系数，同时提高了碳的界面传递系数。