BFe10-1-1摩擦塞补焊接头组织及性能研究  

Study on Microstructure and Properties of FPW Joint of BFe10-1-1

作　　者：张忠科[1] 陈荣耀 纪宝成 ZHANG Zhongke;CHEN Rongyao;JI Baocheng(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050

出　　处：《有色金属工程》2024年第6期1-8,共8页Nonferrous Metals Engineering

基　　金：甘肃省科技重大专项(18ZD2GC013);甘肃省知识产权计划项目(22ZSCQ052)。

摘　　要：采用顶锻式摩擦塞补焊方法对5 mm厚的BFe10-1-1铜镍合金进行匙孔补焊实验,探讨了不同主轴转速下塞补焊接头的微观形貌、显微硬度、温度场分布及其力学性能。结果表明:主轴转速对铁白铜塞补焊成形有重要的影响,随着转速提高,接头底部缺陷逐渐缩小,塞棒区金属摩擦流线明显,晶粒呈破碎细化特征,接头从上到下,热影响区范围缩小明显。由于细晶强化作用,塞棒区显微硬度高于母材,且塞棒上侧显微硬度高于中下侧。在转速为2 100 r/min时得到接头拉伸强度最高,达到母材78%。接头表现出韧性断裂特征,随着转速提高,接头弱连接缺陷逐步下移,并不断缩小。The keyhole repair welding experiments were conducted on 5 mm thick BFe10-1-1 copper-nickel alloy using the friction plug repair welding method.The study examined the micro-morphology,micro-hardness,temperature field distribution and mechanical properties of the plug repair welding joint at different spindle speeds.The results indicated that the spindle speed significantly influenced the plug welding form of the Copper-Nickel-Iron alloy.As the spindle speed increased,the weak connection defect at the bottom of the joint gradually diminished,the metal friction flow line in the plug area became more evident,and the grain was broken and refined.The heat affected zone was considerably reduced from the top to the bottom of the rewelded joint.Due to the fine grain strengthening,the microhardness of the plug zone was higher than that of the base material,and the microhardness of the upper side of the plug zone was higher than that of the middle and lower side.The tensile strength of the joint was the highest at 2100 r/min,reaching 78%of the base material.The joints showed ductile fracture characteristics.With the increase of rotational speed,the weak connection defects of the joints gradually decreased and shrank.

关 键 词：BFE10-1-1 摩擦塞补焊 显微组织 力学性能 主轴转速 

分 类 号：TG457.13[金属学及工艺—焊接]