Resumen
The effect of refining-modifying treatment of secondary aluminum alloy ??5?2 was researched. The modifier 10?20 % Na2CO3, 15?20 % SrCO3, 12?20 % SiC, 3?8 % Ti, 0,5?2 % C, the rest S was worked out and used. The improvement of tensile strength and plasticity of the alloy was obtained.