本文介绍了如何提高螺纹联接强度的问题。特别是探讨了处于外加变载荷工作状态时的螺纹联接,只要在塑性域内工作点选得合理,就可以提高联接的抗疲劳能力。文中就利用“冷作硬化”原理,施行二次锁紧进一步提高疲劳极限的问题,也作了简要的介绍。 This article describes how to improve the strength of a threaded connection. In particular, it discusses the thread connection when the working condition is under variable load. As long as the working point in the plastic zone is selected reasonably, the fatigue resistance of the joint can be improved. The article on the use of “cold hardening” principle, the implementation of secondary locking to further increase the fatigue limit, but also made a brief introduction.