In this work, two types of wear testing systems are constructed (cylinder and curved samples) to conducted the wear experiments for specimens such as Copper C10300, AA4145 Aluminum alloy and Brass Alpha. These samples are prepared as cylinder samples (disc) with a diameter of 26mm and as curved samples (half bush) with a diameter of 16mm. Chemical compositions technical are conducted for three types of samples and we could know samples type according to ASM tests.
All wear experiments have been conducted under lubricated condition and at different parameters such as sliding times 15, 30 ,45 , 60 , 75 , 90 , 105 and 120 min, rotating disk speeds 375 , 625 , 750 and 1300 rpm, applied normal loads of 2.5, 5, 7.5, 10, 12.5 and 15 N, different Vickers hardness and surface roughness. The effects of these parameters on wear rate values have been studied carefully.
Different materials have been deposited on all specimens to reduce the wear rate such as Nickel powder, mixture of Ni+SiO2 and deposition of copper layer on AA4145 Aluminum alloy specimens before Ni+SiO2 deposition, the deposition processes have been conducted at different deposition time.
Nd-YaG laser has been used to carry out hardening for all specimens to reduce the wear rate. The wear rate results reveal that the values of wear rate are reduced by 39%, 36.5% ,38.5% when we employed electroplating deposition of Nickel for Aluminum alloy, Copper and Brass respectively, and by 52%, 53% in the case of Ni+SiO2 deposition for Copper, Brass, while decreased the values of wear rate for Aluminum alloy specimens by 55%, when we used Copper deposition before Ni+SiO2 layer. The hardening by laser method leads to reduce the wear rate by 55%, 56%, 68% for Aluminum alloy, Copper and Brass specimens respectively.