Vacuum Die Casting Technology On Aluminum Alloy Die Castings?

  • Aluminum alloy die casting is a type of casting technique that involves injecting molten aluminum alloy melt into a mold cavity at a high temperature and speed. The products are formed precisely, and the production efficiency is high, as a result of this casting process. However, there are some flaws in the traditional die-casting method, such as the inability to efficiently remove gas in the mold cavity during high-speed injection, resulting in porosity defects and poor casting mechanical properties. People use the vacuum die casting method to solve this problem, which involves drawing out the gas in the mold cavity to create a vacuum or negative pressure state, which reduces porosity defects in the casting. The impact of vacuum die casting technology on the appearance, efficiency, and mechanical properties of aluminum alloy die castings is discussed in this article.


    What Is Vacuum Die Casting, and How Does It Work?
    Some modern die casting methods, such as ultra-low speed die casting, oxygen filling die casting, and vacuum die casting, have been studied for a long time in order to expand the application range of die castings and improve their mechanical properties. The main goal of the methods described above is to minimize air entrainment during the liquid metal filling process, thereby improving the mechanical properties of castings. The two methods are not commonly used in actual production due to the poor production performance of low-speed die-casting and the drawbacks of oxygen filled die-casting, such as complicated operating procedures and difficult control of process parameters. The theory of vacuum die casting is that the gas in the cavity is removed and the liquid metal is filled in the cavity under vacuum conditions, reducing the amount of gas involved and improving the casting's mechanical properties. Furthermore, the vacuum die casting method is identical to traditional die casting, the process is simple, and production efficiency is unaffected. As a result, vacuum die casting has shown strong vitality since its inception, and with the advancement of related technology, its use will become increasingly widespread.


    What Effects Does Vacuum Die Casting Have On Aluminum Alloy Die Castings?
    We add it on the basis of the original mold to address the problems of poor appearance quality, poor mechanical properties, and low average pass rate of aluminum alloy fast joint (OPW) developed by common die casting method in a specific business. We arrived at the following conclusion after a series of steps: research, test results, and study, appearance quality of the aluminum die casting sample, mechanical properties of the aluminum alloy die casting sample, and average eligible rate comparison.


    1. After the tensile strength test, the cross-section grain of the vacuum die casting sample is finer and the color is closer to the original color of aluminum alloy than the ordinary die casting sample. The surface blister of the vacuum die casting sample is reduced after T6 heat treatment, the diameter of the same portion of the sample is measured, and the diameter of the common die casting sample is increased by 0.1 as compared to before heat treatment. Vacuum die casting tests, on the other hand, show little variation.


    2. Vacuum die casting samples have marginally better mechanical properties than ordinary die casting samples when cast. Tensile strength improved by 6.67 percent, elongation improved by 25%, and hardness improved by 4.34 percent. The mechanical properties of vacuum die casting samples are still strong after T6 heat treatment, and the elongation is increased by 180 percent as compared to as cast samples, while the mechanical properties of ordinary die casting samples are greatly reduced.


    3. Vacuum die casting technology improves the efficiency of aluminum alloy die casting surfaces while also lowering average porosity. The average qualified rate of 633f-2 type quick coupling can reach 89 percent among them, and the qualified rate of 633f-2 type quick coupling has increased by 28 percent when compared to the ordinary die casting method.