Determination of optimum aging temperature and time, mechanical and wear properties for Cu-9Ni-6Sn spinodal bronze alloy cast using permanent mould

摘要

A detailed study was performed to find the optimum aging temperature and time for Cu-9Ni-6Sn spinodal alloy cast using permanent mould. The mechanical and wear properties of the alloy were determined and their variations with the aging temperature and time was researched for solutionised and aged condition. The as-cast dendritic structure was completely removed from the alloy after the heat treatment process. The top hardness was found to increase and then decreased with the aging temperatures and time. The optimum aging time and temperature for the Cu-9Ni-6Sn spinodal alloy were also determined. The tensile properties were found to be high when compared with that of the Cu-6Sn. The wear rate values exhibit a decrease with an increase in the hardness of the spinodal alloy. Characterisation of the spinodal alloy was conducted to discuss the wear mechanism and the fracture mode of the spinodal alloy.