The Research Of Steel/aluminum Phase Friction Welding Technology For Electrolytic Aluminium Guide Bar

Traditional pre-baked anode aluminum electrolytic cell anode rod is realized by using explosion welding piece as the transitional connection. In this paper, the phase friction welding technology is used to connecting130mm*130mm*2420mm aluminum guide bar and165mm*210mm cast steel claw, replaced the traditional method which using aluminum/steel explosive welding block as the transition way, and to achieve the purpose of realizing automation production, saving energy and reducing consumption. By mechanical tensile test, impact test, microstructure analysis under different process parameters:friction time, rotational speed, Advanced upsetting time, pressure, the influence of these parameters on the welding performance was studied, Analysis obtained the relationship between technological parameters, microstructure and mechanical properties of aluminum/steel friction welding. At last, This experiment get the optimal technique, satisfies the requirement of industrial production.This paper studied mechanical properties of aluminum/steel friction welding joint and traditional type welding joint respectively, and testing the resistance value of the welding joint in the real environment of aluminum-electrolytic. The test results show that aluminum/steel friction welding joint can withstand a maximum load of88ton, higher than the traditional type welding joint with59ton; Under the condition of temperature350℃, electric current7KA, this new friction welding technology can bring about8mv drop for electrolytic aluminium anode average, friction welding technology applied in the electrolytic aluminium industry has obvious advantages.In this paper, the organization composition, fracture morphology and diffusion behavior of aluminum/steel friction welding join were studied. The results show that: Under the optimal welding process, joint formed smoothly and beautiful, heat affected zone of Aluminium and steel had different degree of recrystallization reaction, and formed the fine grain zone; Interface Fe and Al elements interdiffusion, formed the transition layer of6-8microns; The tensile fracture contains plastic zone and brittle zone, The microstructure of plastic zone is elongated dimple fracture, and the microstructure of brittle zone is "Rivers" cleavage plane.Finally, applying of DEFORM software simulated the welding process temperature field and stress field of aluminum guide bar and steel talon, as revealed in the process of friction welding interface behavior provides certain theoretical guidance.