ALUMINUM-ZIRCONIUM-TITANIUM-CARBON CRYSTAL GRAIN REFINER FOR MAGNESIUM AND MAGNESIUM ALLOYS AND PREPARATION METHOD THEREOF

摘要

An aluminum-zirconium-titanium-carbon (Al-Zr-Ti-C) crystal grain refiner for magnesium and magnesium alloys, having a chemical composition, in weight percentage, of: 0.01% to 10% of Zr, 0.01% to 10% of Ti, 0.01% to 0.3% of C, and Al accounting for the rest. Also provided is a preparation method of the crystal grain refiner. The crystal grain refiner is an intermediate alloy that has a strong nucleation capability, and therefore a good capability to refine magnesium and magnesium alloy crystals. The crystal grain refiner can be industrially applied in the casting and rolling of magnesium and magnesium alloy section bars, thereby making it possible for magnesium to have wide industrial application.