Aluminum alloy die-casting process and mold technology development status analysis

After the 1990s, China's die-casting industry has made amazing development and has developed into a new industry. At present, the aluminum alloy die-casting process has become one of the most widely used processes in the automotive aluminum alloy forming process, accounting for 49% of the various automotive molding process methods.

China's existing die-casting enterprises about 3,000, die casting production from 266,000 tons in 1995 rose to 870,000 tons in 2005, the annual growth rate remained at more than 20%, of which aluminum alloy die casting accounted for all die casting production of more than 3/4. The types of die casting products in China are diversified, including automobiles, motorcycles, communications, home appliances, hardware products, power tools, IT, lighting, escalator steps, toy lights, etc.. With the improvement of technology level and product development ability, die-casting product types and application fields are expanding, its die-casting equipment, die-casting mold and die-casting process have undergone great changes. Die-casting aluminum alloy die-casting aluminum alloy since 1914 into commercial production, with the development of the automotive industry and the invention of cold chamber die-casting machine, has been rapid development.

The die-casting aluminum alloy is divided into two kinds according to the performance: low and medium strength (such as China's Y102) and high strength (such as China's Y112). At present, the industrial application of die-casting aluminum alloy mainly has the following series: Al-Si, Al-Mg, Al-Si-Cu, Al-Si-Mg, Al-Si-Cu-Mg, Al-Zn and so on. The improvement of mechanical properties of die-casting aluminum alloy is often accompanied by the reduction of casting process performance, pressure casting because of its high-pressure rapid solidification characteristics make this contradiction in some aspects more prominent, so the general die casting is difficult to solid solution heat treatment, which restricts the improvement of mechanical properties of die-casting aluminum alloy, although oxygen-filled die-casting, vacuum die-casting, etc. is an effective way to improve the mechanical properties of the alloy, but there is still some difficulty in the widespread adoption Therefore, the develop