This research is an aluminum, semi-solid casting technology SSM 7075 by the creators of friction points. At speeds of 380, 760, 1240 and 2500 rev / min and the time of the infusion of 60, 90 and 120 seconds to find the physical side surface welds in all conditions on the harmonization good welds. And at the base of the welds have good penetration cracks found no harmonization of the welds. The speed at around 2500 found that physical appearance. On the front surface of welds in all conditions, the harmonization bad welds. And at the base of the welds are poorly absorbed deep cracks found no harmonization of the welds. And found that the process friction points that can increase the hardness and strength to pull. The hardness of the workpiece by means of friction points with an average of approximately 115.18 HV hardness, which is higher than the original metal accounted for 27.7% compared to the same metal. (Stiffness of metal the average of 90.2 HV) the conditions that give maximum hardness is the speed at 1240 rev / min and time in the freezer for 60 seconds, the tensile strength of the workpiece by means of friction model. The highest average value of about 194.20 MPa and conditions that provide the tensile strength is the maximum speed of 2500 rev / min and time in the freezer for 90 seconds, the study concluded that process friction points that can improve the mechanical properties. The casting of aluminum semi-solid.
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