本文研究了扩展位错攀移的高温蠕变机制。在文献[1]提出的扩展割阶束集模型的基础上,求出了在外加应力作用下割阶束集所需的时间和扩展位错的攀移速率,从而推导出稳态蠕变速率的表达式。根据此表达式,稳态蠕变速率与层错能的三次方成正比。这与一般实验结果相符。文中还指出了在某些情况下偏离三次方关系的可能原因。 In this paper, the creep mechanism of extended dislocation climbing is studied. On the basis of the extended cut order set model proposed in [1], the time required for the cut order set under applied stress and the climbing rate of extended dislocation are obtained, and the steady-state creep rate Expression. According to this expression, the steady-state creep rate is proportional to the cubic power of the stacking fault energy. This is consistent with the general experimental results. The article also points out the possible reasons for deviating from the cubic relationship in some cases.