In order to achieve idea microstructure and mechanical properties of semi-solid aluminum alloy, taking ADC12 aluminum alloy as research objective, the effects of different technologic parameters on the microstructure and mechanical properties of semi-solid aluminum alloy were analyzed.

The main purpose of this dissertation is to study the rheological behavior of semi-solid aluminum alloys (A356) in die-casting and the effects of gate upon the mechanical properties after the relative theory thoroughly.

By using sheathed extrusion technique,the bonding and forming of stainless steel and semi solid aluminum alloy are successfully realized.

The effects of deformation,heating temperature and holding time on microstructure of LC9 alloy in producing semi-solid billet by strain induced melt activated(SIMA) process were studied and structure evolution of semi-solid LC9 aluminum alloy was observed.

Rheologic Forming Theory of Semi-solid Alloy Part I: Rheologic Filling Theory;

Critical condition on rheological filling of semi-solid alloy;

This paper introduced the advantages to produce semi-solid alloy by using the inclined cooling plate such as its short flow,low cost,simple equipment,high production efficiency,and it can produce big size roughcast.

The results show that the optimum gap between roll and shoe varies in 2～3?mm; pouring temperature can affect grain size and its shape of semi solid alloy.

The results indicate that the transient peak of apparent viscosity of semi solid alloys increases with expanding the rest time under the same experimental conditions.