The alloy slurry was prepared by ultrasound vibration thermal equilibrium method

direct thermal equilibrium method and traditional casting process.Then die-casting forming was conducted at the same pouring temperature

mold temperature

injection pressure and injection speed.The heart part and edge part of die castings were sampled

and the microstructure was observed.The same part of die castings was sampled for tension test.The effects of different process conditions on microstructure and mechanical properties of die castings were analyzed comparatively.The results show that the microstructure of die castings obtained by ultrasound vibration thermal equilibrium method semi-solid process presents the most tiny

round and uniform structure with the satisfied mechanical properties

and then that by direct thermal equilibrium method.After T6 treatment

the comprehensive mechanical properties of die castings are improved significantly.