The application discloses a kind of high
thermal conductivity high strength aluminum
alloy material and preparation method thereof, it includes the following steps: S1: weighing according to percentage by weight: La, Sc, Zr, Si, Mg, Zn, Cu, Ti, B, Sr, Al, Fe, Mn;S2: Al, La, Si is melted at 720~750 DEG C, and first melt is obtained;S3: add Sc, Zr, Ti, B intermediate
alloy, and second melt is obtained;S4: cooling to 700~710 DEG C, and Mg, Zn, Cu are stirred evenly, and third melt is obtained;S5: by
gas dispersion stirring, reinforcing phase is added, and simultaneously ultrasonic auxiliary treatment is handled, and composite melt is obtained;S6: vacuum high-
pressure die casting is formed, and
die casting is obtained;S7: pre-aging and main aging treatment are sequentially carried out, and it is obtained immediately.The application realizes the high
thermal conductivity and high strength of aluminum
alloy, and can meet the long-term durability and stability requirements of high-end fields such as 5G communication,
new energy automobile and the like to heat dissipation structural member.