Solution heat treatment followed by Quench and return is one of the important processes in the production of cast aluminum aluminum castings and significantly improves the microscopic structure and mechanical properties and changes the temperature of the fuzzy evolution in these alloys. In the present study, the effect of heat treatment on aluminum fatigue of cast bronze containing 11-10% aluminum, 4% nickel, 4% iron and 3% manganese was investigated. After production, the alloy has been subjected to thermal maintenance at temperatures of ◦700, 750, 800, 850 and 900 ، C for 20-30 minutes, quench in water, and finally return to ◦C600 ساعت C for 2 hours. The results of this study showed that aluminum casting bricks have a much higher fatigue rate than non-thermal cast aluminum alloys, and the highest fatigue level as well as hardness is obtained at ◦850 عملیات C. . The structure of the microscope and the images of the electron microscope obtained from the refractive surface of the cast and heat-treated specimens also confirm this.