大螺距异型螺纹牙根的微滚压强化技术  

Trace rolling strengthening technology of steep-pitch nonstandard thread

作　　者：张素颖[1] 周智敏[1] 吴晓苏[1] 管奇峰 

机构地区：[1]杭州职业技术学院友嘉机电学院,浙江杭州310018 [2]杭州友佳精密机械有限公司,浙江杭州311215

出　　处：《金属热处理》2015年第4期135-138,共4页Heat Treatment of Metals

基　　金：浙江省教育厅科研项目资助(Y201430785)

摘　　要：结合钻杆接头螺纹的服役工况,针对大螺距异型螺纹,利用普通数控车床和专门制作的滚压装置微量滚压螺纹根部。结果表明,合适的滚压工艺参数能够提高牙根表面硬度(57 HV0.5),表面粗糙度数值降低1个等级,显微组织出现了致密纤维层,金属表层得到强化,钻杆接头螺纹的疲劳寿命有所提高。Combined with the service conditions of the tool joint threads, aiming at the steep-pitch nonstandard threads, the root of screw thread was trace rolling by using CNC lathe and specialized made rolling device. The results show that the appropriate rolling process parameters can improve the hardness （57 HV0. 5） of root surface, reduce the surface roughness by two grades, and there are dense layer of fibers to appear in surface,by which the properties of metal surface are strengthened. The fatigue life of the drill pipe joint screw thread can be improved.

关 键 词：钻杆接头 大螺距 异型螺纹 微量滚压 强化性能 

分 类 号：TG376.3[金属学及工艺—金属压力加工]