At this stage, China's industrial die-casting technology is mainly manifested in aluminum silicon, aluminum magnesium, aluminum silicon copper, etc., the use of alloys requires greater, and the strength of the die-casting alloy is also very high. In order to ensure the formation of products with better materials in mechanical production, breakthroughs must be made in processing performance and regeneration performance to ensure the better development of aluminum alloy casting technology.

1. Development of die-casting aluminum alloy

In understanding the current development of die-casting aluminum alloy technology, mainly focusing on the lack of high temperature resistance of aluminum alloy castings in the traditional country, under the conditions of heat treatment, aluminum alloy components will be damaged, which greatly affects the overall performance of the alloy. Through a large number of analysis studies and experiments, the use of die-casting aluminum alloy can effectively improve the shortcomings of traditional technology. This technology has been widely used in automobile production, and the overall construction of the car body has high requirements for mechanical properties, and the die-casting technology can meet the mechanical characteristics. At the same time, the composition of the alloy can be adjusted, so that the strength of die casting can be controlled according to different needs.

The alloy mode of aluminum-silicon-copper has played a good performance in die casting, and the change of mechanical properties can also be well controlled, the alloy has good flow properties between substances in casting, ensuring the compactness of the material, and after high temperature casting, the molecules are recombined to form crystals to ensure the stability of the structure plays a key role. Combined with this feature, the use of cast alloy in the braking system of the car not only ensures the safety performance of the car, but also significantly reduces the cost of production.

The characteristics of aluminum-silicon alloy are used in the production of smaller parts, and such casting technology products can be used for some parts with high production requirements and high precision. In the processing of the factory, it is found that the strength and poor mechanical properties of the alloy are the key factors for the development of technology, and the aluminum-silicon alloy is born on this basis, through mechanical calculations, the aluminum-silicon alloy is 27% higher than the elongation of ordinary alloy materials, and the strength is 19% higher. At present, the aluminum-silicon alloy group is used in mechanical equipment such as pallets of automobiles.

2. The use of new die-casting aluminum alloy

On the basis of the casting of aluminum-silicon, aluminum-magnesium and aluminum-silicon-copper alloys, the alloy form of aluminum-silicon-magnesium was developed. Fully considering the special requirements of the alloy in mechanics, increasing the temperature of casting can strengthen the strength of the alloy material, increase the type of alloy material, and use semi-solid processing to greatly improve the performance of the alloy, but the alloy will appear brittle deformation, in order to solve the plasticity reduction after the addition of magnesium, consider increasing titanium. According to the experiment, when the content of titanium is about 0.05%, the molecules inside the alloy can be reconstructed to form a stable structure, and the problem of insufficient brittleness of the alloy has been well solved, and the index of yield strength has also been greatly improved. In addition, after adding titanium, the strength of the alloy increased by 7.6% at the same temperature under heat treatment, indicating that the strength increased at the same temperature and reduced the casting cost.

As the use of aluminum-iron alloy has a large application space in aerospace, high-temperature resistant materials are the main constrained factors of alloy technology, the use of aluminosilicon iron alloy form makes the tensile strength of alloy materials increase, while the elongation becomes larger. But at the same time, in the deficiencies, after adding iron, the flow properties of the alloy decrease, the internal temperature rises too fast, resulting in a large temperature difference between the inside and outside, and there will be a hot crack, which brings great difficulties in the later maintenance and repair, so in actual use, the material should be carefully selected.