超细晶粒钢筋焊接接头的疲劳强度  

Fatigue Strength of Welded Joints for Architecture Reinforcement Steel Bar With Ultrafine Grains

作　　者：侯振波[1] 史耀武[1] 李晓延[1] 田志凌[2] 何长红[2] 

机构地区：[1]北京工业大学材料科学与工程学院,北京100022 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《钢铁研究学报》2007年第2期43-46,共4页Journal of Iron and Steel Research

基　　金：国家"973"重大基础研究资助项目(G1998061500)

摘　　要：超细晶粒钢是一种细晶强化的新一代钢铁材料,焊接加工对焊接接头疲劳性能的影响是人们关注的问题。参照建设部《钢筋焊接接头试验方法标准》的规定,对超细晶粒钢建筑钢筋闪光对焊、电渣对焊接头的疲劳寿命进行了测试。测试结果表明:高载荷下,闪光对焊接头的疲劳寿命明显优于电渣对焊接头,随着载荷的降低,2种接头的差距变小。在200万次循环下,两者的疲劳强度基本相当。Ultrafine grained steel is a new generation steel. A greatdeal of attention to has been paid the effect of welding process on fatigue performance. In the present work, fatigue lifetime has been measured for flash butt welded joints and electrical slag welded joints of the ultrafine grained steel, based on a standard of State Architec- ture Ministry named ＂Testing method of reinforcement steel bar welded joint＂. It is found that the fatigue lifetime of flash welded joint is higher than that of electrical slag welded joint. With the decrease of load, the gap between the both becomes small. For the of 2 000 000 cycles, the fatigue strength of the both is almost the same.

关 键 词：超细晶粒钢 钢筋 焊接接头 疲劳强度 

分 类 号：TG407[金属学及工艺—焊接]