Study on Microstructure and Properties of FPW Joint of BFe10-1-1
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 2 100 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.
NETL
NSTL
万方数据
