STUDY THE EFFECT OF SOLUTION TREATMENT ON MECHANICAL PROPERTIES OF AL-7%SI-0.3%MG ALLOY

This research includes study the effect of solution treatment (T6) on wear behavior of Al-Si-Mg alloy. The tested samples were solution treatment at (150,170,200 oC) for range of aging time (60, 90, 120 min.) with sliding speed 0f (0.94 m/s) during test time of (5, 10, 15, 20 min.). The results show that as aging time was increased ,the wear rate was decreased ,also we observed that as wear test time was increased, the wear rate was increased also, for aging temperature we found the were rate was decreased with the increasing of aging temperature. The vickers hardness number Hv was increased with increasing of aging time and aging temperature. The optimum hardness value was found at aging temperature of (200 oC) and minimum wear rate at aging temperature (120 oC), and we found at that solution treatment improved the were rate by 5% and 55% for hardness number at aging temperature 200 oC as compared with cast alloy.