Abstract
This paper reports our work on developing an inertia radial friction welding (IRFW) technique to join a 35CrMnSi steel shaft with a T3 copper (Cu) annular block. The microstructure of the T3 Cu/35CrMnSi steel dissimilar metal joint materials is studied. The results show that a quenching zone exists obviously near the interface on the 35CrMnSi steel side, and a soft region exists in the heat-affected zone (HAZ) on the 35CrMnSi steel side also according to microhardness measurements. The super-plastic deformation zone (SDZ) is more obvious on the T3 Cu side than on the 35CrMnSi steel side. The microhardness of the SDZ is higher than that of the T3 Cu base metal on the T3 Cu side. Element diffusion occurs through both sides of the dissimilar metal welded joint. The hardening phenomenon existing in the joint is attributed to the effect of the plastic deformation, element diffusion, and recrystallization. New FeCu4 and Cu9Si compounds are formed in the friction bonding interface, which suggests that the T3 Cu and 35CrMoSi steel dissimilar metals experience a landmark metallurgical bonding. The shear strength test results show that the T3/35CrMnSi dissimilar metals are joined together successfully in the IRFW process.
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Wang, Y., Luo, J., Wang, X. et al. Interfacial characterization of T3 copper/35CrMnSi steel dissimilar metal joints by inertia radial friction welding. Int J Adv Manuf Technol 68, 1479–1490 (2013). https://doi.org/10.1007/s00170-013-4936-7
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DOI: https://doi.org/10.1007/s00170-013-4936-7