The problem of extending the life of die-casting molds has always been a topic that application companies have been interested in. It has come to the attention of the majority of die-casting mold manufacturers and purchasers that there is a reasonable casting services selection of materials for die-casting mold forming parts.

During the late 1970s, when we were in the process of translating the die-casting standards for DCSP1 aluminum alloy and DCSP2 zinc alloy that were developed by the Japan Die Casting Association, we compared and contrasted the die-casting mold materials that were specified in the standards with the mold steels of the United States of America, West Germany, the United Kingdom, Sweden, and the Soviet Union. As a result, we decided to conduct experimental research on 4Cr5MoSiV1 steel, and we requested that Fushun Steel Plant melt it in accordance with the technical conditions that we had developed. Listed below are the most important points.

In the first place, the chemical composition and impurity content ought to be in accordance with the expectations. The third solution is to mandate that the ratio of steel forging casting services must be greater than 4S. Consequently, it is an essential type of promotion steel that is utilized in the process by which our nation develops national standards for die-casting molds.

1) Strength and toughness are two characteristics that are shared by H13 steel, which is a type of air-cooled hardening hot-working die steel.

2) It has a high resistance to thermal cracking and can be cooled with water in the workplace.

3) The secondary hardening ability during tempering is poor due to the low carbon content of the material.

4) It is able to withstand the softening that occurs at higher temperatures; however, the hardness of the material decreases rapidly when the service temperature is higher than 540 degrees Celsius (1000 degrees Fahrenheit).

5) Resistance to decarburization that is moderate.

In H13 steel, the carbon content, also known as the mass fraction, is lower than zero. The amount of carbon that is present in steel is approximately five percent, which, in conjunction with other carbide-forming elements, gives the steel itsAs a result of its high hardenability and good softening resistance, the steel can be hardened under air cooling conditions, and its maximum quenching hardness is approximately 55 HRC.

The casting has an unreasonable structural design, which results in thin sections in the mold. These thin sections become the source of fracture in the casting. that will result in the wall or core of the mold being eroded.

As a result of the one-sided emphasis placed on preserving steel, many instances of early deformation or fracture take place. In the event that the matching accuracy level of each component is not properly selected, or if gaps are present, the thermal conductivity will decrease, and thermal fatigue will occur earlier than expected. Rapid ejection mechanisms have been taken into consideration for use in contemporary mold structures. On the one hand, it is implemented to enhance the efficiency of production; on the other hand, it is also implemented to decrease the amount of time that castings are retained in the mold and to eliminate the thermal load that is placed on the mold material.

It is imperative that the thermal balance of the mold be taken into full consideration during the design process of the mold in order to ensure that the mold is able to maintain a consistent and reasonable working temperature. The reason for this is that during the die-casting process, molten metal is injected into the mold cavity. This causes a significant amount of heat to be released in a very short China die casting manufacturer period of time, which in turn causes the temperature of the mold to rise. At the same time, the mold goes through the processes of conduction, convection, radiation, as well as mold surface spraying and cooling water absorption. A portion of the heat will result in a decrease in the temperature of the mold. 

During this time period, there will not be a significant change in the temperature of the mold. Additionally, the extent is determined by the mold's capacity for thermal control. This equilibrium temperature is typically controlled at forty percent of the alloy pouring temperature. This is due to the fact that there is a temperature gradient in each component of the mold, and the temperature is constantly changing throughout the cycle. Additionally, with the difference in wall thickness of the casting, this temperature is also constantly changing. In terms of molding processes, zinc alloy die-casting is not dissimilar to other processes.

Here are some of the product characteristics that are associated with zinc alloy die castings of superior quality:

1. It is more robust than plastic injection molding, and it has a higher specific gravity, weight, and texture than plastic injection molding. It is capable of die-casting precision parts with complex shapes and thin walls, and the surface of the castings is smooth. All of these characteristics contribute to its good casting performance.

2. It does not attract iron during the melting and China die casting manufacturer processes, it does not prevent the mold from corroding, and it does not adhere to the mold.