Semi-solid ZL203 aluminum alloy was prepared by low power ultrasonic melt processing-inclined plate compound preparation process

and influences of different process parameters on the microstructure and properties of semi-solid aluminum alloy were investigated by orthogonal testing. The results show that the fine and uniformly distributed microstructure containing mainly α-Al phase can be prepared by reasonable control of the process parameters. Preheating temperature of the mould is the most important factor controlling grain size

and ultrasonic vibrating temperature is dominant in affecting tensile strength. With the ultrasonic vibrating temperature of 660 ℃

and the preheating temperature of mold of 25 ℃ and inclined plate of 25 ℃

the microstructure and tensile strength of ZL203 aluminum alloy exhibit desirable.