Die casting die forging process is a process completed on a special die casting die forging machine. Its basic technological process is as follows: the liquid metal is first filled into the mold cavity by low-speed or high-speed casting, and the mold has a movable cavity surface. With the cooling process of the liquid metal, it is pressurized and forged, which not only eliminates the shrinkage cavity and porosity defects of the blank, but also makes the internal structure of the blank reach the broken grains in the forging state. The comprehensive mechanical properties of the blank have been significantly improved. In addition, the surface finish of the blank produced by this process reaches grade 7 (Ra1.6), which is the same as the surface produced by cold extrusion process or machining, with metallic luster. Therefore, we call die casting and die forging process "limit forming process", which is a step further than "no cutting and less allowance forming process". Another advantage of die casting and forging process is that in addition to the production of traditional casting materials, it can also use deformation alloy and forging alloy to produce parts with complex structure. These alloy grades include: hard aluminum super hard aluminum alloy, wrought aluminum alloy, such as LY11, LY12, 6061, 6063, LYC, LD, etc.). The tensile strength of these materials is nearly twice as high as that of ordinary cast alloys, which is of more positive significance for aluminum alloy automobile wheels, frames and other parts that hope to be produced with higher strength impact resistant materials.