Properties of SAE660‎‏ ‏Bronze Bearing at Four Different Casting Conditions

The goal of this research is an investigation on the effect of 2 parameters of casting process including cooling rate of mold and pouring temperature on the 2 important characterization including Vickers hardness and wear resistance via pin on disc of bearing bronze SAE660. The melting had done by transistor induction furnace and then, pouring had done in sand mold in four different casting conditions, including pouring temperatures of 950C and 1200C, and cooling with water and air and finally, the microstructure via scanning electron microscopy, Vickers hardness and wear resistance via pin on disc of the SAE660 bronze had compared. The results indicated that the effect of pouring temperature can be ignored for wear resistance but the minimum weight loss due to wear via pin on disc (or maximum wear resistance) obtained when the samples cooled with air compared to water cooling, because the contents of lead, intermetallic compounds and the phase of solid solution is more in the samples cooled with air compared to water cooling. In addition, maximum hardness obtained for low pouring temperature.