前言钻杆锁接头是钻探工程中消耗量很大的一种零件。国内目前所用锁接头,由于选材不够合理,热处理工艺不够得当,因而质量较差,使用寿命较短,经常发生裂断和折断事故。如何减少钻杆锁接头的磨耗和断裂,已是目前探矿工程界急待研究解决的问题。在钻探过程中,锁接头承受着复杂的交变载荷,主要是拉压、扭转、弯曲和振动, Preface Drill pipe lock fittings are a consumable part of a drilling project. Lock connectors currently used in the country, due to material selection is not reasonable enough, heat treatment process is not properly enough, so the quality is poor, shorter life expectancy, frequent cracking and breaking accidents. How to reduce the abrasion and fracture of the drill pipe locking joint has become an urgent problem to be solved in prospecting engineering. During the drilling process, the lock joint is subjected to complex alternating loads, mainly tension and compression, torsion, bending and vibration,