In this article, the reason how the friction produces in the process of metal forming was analyzed, and the friction was thought to be mainly caused by the plastic flow of metal in the pits of tool surface.

• 本文从微观入手对金属压力成型过程中摩擦的形成原因进行了分析，认为摩擦主要是由于被压入工具表面凹坑金属的塑性流动所引起的。