The International Conference of Materials and Engineering Technology, Gaziantep, Turkey, 5 - 06 November 2021, pp.1
SAE 600 bronze is a general-purpose bearing alloy, which is still used in ship propellers, submerged bearings, and in small electric motors due to its good anti-friction properties, high strength and hardness, adequate ductility, and excellent machinability. It has also been found applications in agricultural machinery, and construction equipment. This study aimed to further improve the frictional properties of SAE 600 Bronze by means of producing micro-features (e.g. lubricant pockets) on contact surface. The micro-pockets were realized through micromachining. First, test specimens were machined to the dimensions of 10x15x26 mm. Then, 40 lubricant pockets with different diameters (0.2 and 0.6 mm) were formed on specimen surfaces. The samples were then tested against AISI 4140 rotating disk using a block-on-disk type of test system. Effect of lubricant-pocket size, normal load value, lubrication conditions on the coefficient of friction and wear performance were investigated. It was measured that coefficient of friction is reduced and stabilized after a certain test duration. Decrease in friction coefficient was observed to be decreasing due to an increase in lubricant pocket diameter. Besides, temperature measurements showed that presence of lubricant pockets is effective on decrease in temperature values.