Abstract:
Hard-faced welding has been adopted across many industries, including the sugar cane industry, as a part of maintenance programs to repair sugar cane rollers. This research aimed to study the effect of the buttering layer types on mechanical properties and microstructure of hardfacing weld on FC25 grey cast iron surface.
Shielded metal arc welding (SMAW) process with specific welding parameters that were composed of a welding current and buttering layer was applied to produce a hard faced weld metal on cast iron surface. The hard-faced metal was investigated for wear resistance, hardness, and microstructure.
The research results showed that the optimum welding condition for the lowest weight loss of 0.0977 % was the weld with non- buttering layer and with the welding current of 130 A. The hardness and the wear resistance with non-buttering layer welding was better than with buttering layer welding. The fine martensitic structure, the lower dilution of electrode composition, and the increase of welding current contributed to the increase of the hardness and the wear resistance property.