Friction surfacing of hypereutectic Al-Si alloy on commercially pure aluminum: Effect of consumable rod heat treatment and heat input
Seyedeh Marjan Bararpour, Hamed Jamshidi Aval, Roohollah Jamaati, Mousa Javidani
Journal of Central South University ›› 2025, Vol. 31 ›› Issue (11) : 4082-4097.
Friction surfacing of hypereutectic Al-Si alloy on commercially pure aluminum: Effect of consumable rod heat treatment and heat input
This study investigated the effect of pre-friction surfacing heat treatment of consumable rods and heat input during friction surfacing on the microstructure, mechanical properties, and wear resistance of hypereutectic Al-Si alloy deposited on a commercially pure aluminum substrate. The results show that regardless of the consumable rod’s heat treatment conditions, the coating’s efficiency has increased with the increase in heat input, so the coating efficiency increases by 20% and 30% in the solid solution-treated rod and the artificially aged rod, respectively. By increasing the heat input, the average grain size in the coating fabricated by solid solution-treated rod and artificially aged rod increased from 0.1 to 0.9 µm and from 0.2 to 1.3 µm, respectively. At constant heat input, the average hardness and wear resistance of the coating created in the solid solution-treated rod are lower than those of the artificially aged rod. By decreasing heat input, the wear loss in the coating fabricated by solid solution-treated rod and artificially aged rod decreased by 10% and 20%, respectively, reaching 0.1 and 0.03 µg/m.
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