Based on the characteristics of the die-casting process and forming solidification, the alloy that will serve as the main body of the die-cast aluminum alloy is selected. Until now, they have also been widely used and produced in large quantities in die-cast aluminum alloys made in large quantities. The issues that are brought to light in this manner are more focused. Common problems must be brought to the public's attention.

Following is an overview of the analysis of hole defects in die castings:

When aluminum alloy is in the liquid state, it reacts with moisture in the air to form Al2O3 and hydrogen. Because of its loose structure and low specific gravity, Al2O3 is comparable to aluminum. It is easily suspended in the aluminum liquid and exhibits a significant adsorption effect when combined with H2. Adsorb the substance at its core. It is inevitable that secondary zinc alloy die casting, which is widely used in the O melting of die-cast  alloy, will cause hidden dangers if the pretreatment is not performed according to standard procedures. The Si element is the most important component of Al-Si alloys. Not only does it have a melting point more than twice that of , but it is also significantly lighter than aluminum. Consequently, in order to ensure that it melts evenly, it is necessary to stir vigorously at a high temperature while incorporating gas. In addition, oxidation is an unavoidable consequence. Additionally, the addition of Si element decreases the solubility of H2 in molten aluminum, and the viscosity and surface tension of the molten aluminum increase as a result, making the formation and floating of bubbles in molten die casting more difficult. All of these are die castings made of AlSi. The cause of the formation of pore defects in alloy castings is currently unknown. This is why the alloy refining process is given particular consideration during the aluminum alloy smelting process. Degassing is the concept that came before it. The presence of many defect failure analyses indicates that the refining process has been purified, that is, that the refining process has been refined. Neither the degassing of the alloy nor the removal of slag are optional; otherwise, the result will be half as good and the purification treatment device for the alloy will be even more efficient.

At the rotating end, it introduces pure argon gas through the distribution holes in the graphite rotor, and it uses argon oxygen as a carrier to introduce the refining flux into the rotating vortex of the refining alloy liquid, which serves as both a degassing and a slag removal device. In addition, there is an effect.

Two other topics to consider are the interpretation of intermetallic compounds and hard points in die castings:

A common problem encountered during the machining process of die-casting alloy car die-casting parts made of the Al-Si series binary system, particularly Al-SiCu series alloys, is the presence of hard spots. The microscopic examination reveals that the majority of them are intermetallic compounds. There are many different elements, as well as primary silicon particles, to consider.

The formation of these defects is common in the die-casting of aluminum alloys under certain conditions. Among these shortcomings are a lack of standardization in die-casting pretreatment, as well as a lack of thoroughness in the refining and purification process during melting. These hidden dangers are particularly sensitive and similar in the die-casting manufacturing process, which makes them particularly dangerous. Alloys are difficult to come by in gravity casting operations. Furthermore, the size and proportion of the gate cross-sectional area during the die casting production process contribute to the formation of flow velocity and turbulence in the injection during the casting process. In addition, if the slag discharge and exhaust system are not designed and installed, it will result inIn terms of the occurrence aluminum die casting parts of defects, it should be noted that, like all aluminum alloy series, the Al-si series is also sensitive to gas inheritance, which should be taken into consideration. As a result, the melting of die-casting alloy ingots as well as the pretreatment of raw materials must be taken into consideration. Additionally, the acceptance of alloy ingots in the factory must be addressed.

In the third section, we will discuss how to interpret air-tightness defects in pressure-bearing die castings:

Because of insufficient air tightness in die-casting parts, pressure-resistant parts such as air pressure, water pressure, and oil pressure frequently leak in the die-casting parts. Similar defects are not uncommon in die-casting parts with complex shapes and uneven wall thicknesses, which are produced by the casting process. Our own personal experience has been as follows:First and foremost, it is necessary to examine the die castings that were produced as part of the trial production. Is it possible for the design and manufacture of molds to ensure that the quality of die castings meets industry standards and is stable? Metallurgical quality of the test pieces, surface quality of die castings, and internal quality results from the perspective are all more important than the results from the perspective. 

Currently, there are 3–5 batches of stable results (a small amount) from production trial production that must pass the die-casting processing assessment before they can be released. The most important of these is the qualified acceptance of the mold, which is the first step. In the mold debugging process, it is necessary to consider the runner design as well as the heat balance of the cavity. An evaluation was conducted, as well as the design of the slag exhaust duct and the implementation of measures such as circulation, water cooling, painting, and local cooling. There are still various measures that can be taken if airtightness of the die casting is considered to be a critical technical requirement for the product. When there is a degree of uncertainty, it is still necessary to use the soaking treatment to ensure the quality of the pressed parts. This is an effective measure to solve the problem of pressure leakage parts.