Continuous drive friction welding was used to realize the high quality connection between pure aluminum and 304 stainless steel. The composition of interface micro-zone and mechanical properties of joint were analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD), tensile test and hardness test. The formation mechanism of intermetallic compound (IMC) during friction welding was discussed. The results show that under the experimental parameters, the joint surface is uneven and two intermetallic compounds, Fe2Al5 and FeAl3, are formed. With the increase of friction pressure, the mechanical bonding degree of the joint decreases, the metallurgical bonding degree increases, the element diffusion distance increases from 1.4 to 1.9 um, the tensile strength of the joint can reach or even higher than that of the base metal on the aluminum side, and the maximum hardness increased from 414 HV to 447 HV.
Joint strength and pipe prerequisite condition for welding of dissimilar thin pipe joint between 5052 Al alloy and 304 stainless steel fabricated by friction welding
