Effect of Processing Parameters and Temperature on Sliding Wear of H62 Copper Alloy Modified by Friction Stir Surface Processing

H62 copper alloy surface was modified by friction stir surface processing (FSSP) with different processing parameters including rotation rate, penetration depth and processing speed of the stirring tool under the room temperature (25 °C). Then friction and wear experiments of the surface were carried on at different temperatures. The experimental results show that (i) the specimens hardness initially increases with increasing the wear test temperature, then decreases with further increasing the temperature for fixed rotation rate and penetration depth, (ii) the wear resistances of the specimens decrease as the rotation rate of the stirring tool increases for fixed penetration depth and wear test temperature, (iii) the wear resistances of the specimens decrease as the penetration depth increases for constant rotation rate and wear test temperature. It is found that the optimal processing parameters are rotational speed 1200 rpm, temperature 100 ℃ and penetration depth 0.2 mm, respectively, which can greatly improve the wear performance of the H62 surface. Therefore, FSSP is a promising technique for modifying H62 copper alloy, which can be widely applied in ship manufacturing