Smelting casting process. The advantages of the smelting casting process is simple equipment, lower cost and can realize the production with large scale, which is the most extensive manufacturing ways of the alloys material. The silicon aluminum alloys manufactured by the common casting has a unbalanced distribution of the Si. When we process the silicon aluminum alloys, it is easy to produce the cracks and other problems which can affect the following machinery treatments. With the improvement of the AlSi alloys of the Si, the terrible will be more terrible, so the common smelting casting is hard to manufacture the silicon aluminum alloys materials.