本文所述系与利用金属成形计算中的流动应力有关的某些问题,对冷成形中由于变形模式改变而引起的应变恢复产生的软化现象尤予注意。文中展示了一些冷成形过程中新近和早期观察到,但均未发表过的软化现象。这些结果证明了早些时候由工藤作出并由Thomsen报告的假设,也就是变形方向的改变导致了冷成形件强度与流动应力间的差别。 Some of the problems described in this paper that relate to the use of flow stress in metal forming calculations pay particular attention to softening due to strain recovery in cold forming due to deformation mode changes. The article shows some recent and early observations of cold forming, but none have been published before softening. These results demonstrate the earlier hypothesis made by Kudo and reported by Thomsen that a change in the direction of deformation results in a difference between cold forming strength and flow stress.