Wear Behaviour of Boron Carbide Added Friction Surfaced Cladded Layer

Abstract

Friction surfacing is a solid-state cladding process based on the linear friction concept, process conceptualized from friction welding. Friction surfacing creates the metallic bonding between two similar or dissimilar materials with the minimum dilution. Deposition of aluminium on mild steel could be the interesting and viable option in the field of solid-state cladding because both materials joining with the fusion-based process are incompatible due to the formation of iron aluminide and Fe and Al are immiscible. Friction surfacing starts a new era of repair and reclamation application in the marine and naval application field. AA 6351 T6 as a consumable rod with 22 mm diameter and SA 516 Gr 70 as a steel substrate material with 6 mm plate thickness. During friction surfacing process, rotating rod is rubbed against the substrate material under the applied axial load under frictional pressure and temperature conditions resulting in a visco-plastic layer at the end of rod tip. Experimentally optimized process parameters were used for the trials. Here, friction surfacing process is carried out in two different variants: normal friction surfacing and friction surface cladding with adding metal matrix boron carbide particles. Pin on disc wear testing is carried out on two different variant loading conditions: 20 and 40 N. Mechanical interlocking is observed between coating layer and substrate material with the fine grain particles. Deposited layer results in superior wear resistance properties due to hot forging action.