A high-density die-casting forming method for aluminum alloy die-casting parts

Abstract

The invention discloses a high-density die-casting molding method for aluminum alloy die-casting parts, which comprises: melting aluminum alloy metal raw materials and raising the temperature to obtain aluminum alloy liquid, adding a solid metal modifier to the aluminum alloy liquid and stirring together; Set a gate on the die-casting mold, preheat the die-casting mold, and spray a layer of release agent on the inner surface of the cavity of the die-casting mold; pour the aluminum alloy liquid into the gate of the die-casting mold, and use injection punching The head forms the aluminum alloy liquid into ultra-low-speed die-casting, and finally injects the aluminum alloy liquid into the cavity of the die-casting mold, thereby die-casting the aluminum alloy liquid to obtain aluminum alloy die-casting parts; the die-casting mold is opened, and the spraying equipment adopts cooling water to The cavity is spray-cooled, and then the aluminum alloy die-casting is taken out from the cavity to complete the die-casting of the aluminum alloy die-casting. The aluminum alloy die casting produced by the invention has a porosity of less than 0.5%, an air content of 0.5-1 / 100g, and high dimensional accuracy.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting, in particular to a high-density die-casting molding method for aluminum alloy die-casting parts. Background technique [0002] For the casting of aluminum alloy die castings, the traditional high-pressure casting process mainly includes three stages of low-speed injection, high-speed injection and pressurization. Since the aluminum alloy liquid fills the mold cavity at high speed and high pressure during die casting, it is inevitable that the aluminum alloy liquid will envelop the gas in the mold cavity, thereby forming pore defects and reducing the density of the casting. Due to the existence of casting pores, the mechanical properties of castings cannot be improved by T6 and T7 heat treatment, which makes it difficult for traditional die castings to meet the mechanical properties requirements of high strength and high toughness. In response to the above problems, a new ultra-low...

AI Technical Summary

Problems solved by technology

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a high-density die-casting forming method for aluminum alloy die-castings, which can solve the problems of low porosity and low gas content in aluminum alloy castings formed by ultra-low-speed die-casting