Joining FE55006 Cast Iron and SAE 8620 Steel by Friction Hydro-Pillar Processing (FHPP)

The possibility of using a special type of Friction Stir Welding (FSW) – Friction Hydro Pillar Processing (FHPP) to manufacture a joining between dissimilar materials (high-carbon ductile iron FE55006 and low-carbon steel SAE 8620) is studied. The macrostructure, microstructure, microhardness and residual stresses of the welded joint are determined. The efficiency of using the FHPP technology for obtaining high-quality joints from dissimilar iron-based alloys is demonstrated. It is established that such joints have a high hardness due to the formation of a martensitic structure in the alloys during their processing by the FHPP method.