Semi-solid slurries of 2024wrought aluminum alloy were produced by self-inoculation technique.The microstructure and typical defects of wheel hub parts which were trial-produced by rheosqueeze forming were investigated

and the countermeasures of these defects were presented.The results reveal that through increasing the velocity of the punch and filling pressure as well as raising preheating temperature of the mould

misrun and cold shut in the wheel hub can be eliminated.Through increasing hold-pressure and hold time

shrinkage porosity（hole）can be decreased.Through controlling solid fraction of the slurries

adjusting filling pressure and holding time

hot crack is avoided.