In the process of die casting production, die casting dies sometimes fail. The causes of failure are mainly caused by the following three aspects. Next, Lianzhou Hardware Die Casting Factory will give you a brief introduction:

1. Fragmentation failure Under the action of the pressure injection force, the die casting mold will initiate cracks at the weakest point, especially the scribing marks or electric machining marks on the molding surface of the mold are not polished, or small cracks will first appear at the corner clearing of the molding. When there are brittle phases or coarse grains at the grain boundary, it is easy to fracture. However, the crack propagates rapidly during brittle fracture, which is a very dangerous factor for the fracture failure of the die. For this reason, on the one hand, all scratches and electric machining marks on the mold surface must be polished, even if they are in the gating system, they must also be polished. In addition, the die materials used shall have high strength, good plasticity, good impact toughness and fracture toughness

2. The commonly used die casting alloys for corrosion failure include zinc alloy, aluminum alloy, magnesium alloy and copper alloy, as well as pure aluminum die casting. Zn, Al and Mg are more active metal elements, which have good affinity with mold materials, especially Al is easy to bite. When the die hardness is high, the corrosion resistance is good, while if there are soft spots on the formed surface, the corrosion resistance is not good

3. Thermal fatigue cracking damage failure During die casting production, the die-casting die is repeatedly subjected to the effect of cold and heat stimulation, and the formed surface and its interior are deformed, which are related to each other, resulting in repeated thermal stress, leading to structural damage and loss of toughness, leading to the appearance of microcracks, which continue to expand. Once the crack expands, molten metal is squeezed in, and repeated mechanical stress accelerates the crack growth

For this reason, on the one hand, the die must be fully preheated at the beginning of die casting. In addition, the die casting mould must be kept in a certain working temperature range during the die casting production process to avoid early cracking failure. At the same time, it is necessary to ensure that there are no internal problems before the mold is put into production and during manufacturing. In actual production, most die failures are thermal fatigue cracking failures

Lianzhou Hardware Die Casting Factory, with years of experience in die casting mold manufacturing and professional technical advantages in product die casting, serves the public, provides each guest with high-quality die castings, and jointly creates a win-win cooperation mode. Welcome to order: die-casting, aluminum die-casting, die-casting parts, die-casting processing

In the process of die casting production, die casting dies sometimes fail. The causes of failure are mainly caused by the following three aspects. Next, Lianzhou Hardware Die Casting Factory will give you a brief introduction:

1. Fragmentation failure

Under the action of the pressure injection force, the die casting mold will initiate cracks at the weakest part, especially the scribing marks or electric machining marks on the molding surface of the mold are not polished, or the formed corner clearing places will first appear fine cracks. When there are brittle phases or coarse grains at the grain boundary, it is easy to fracture. However, the crack propagates rapidly during brittle fracture, which is a very dangerous factor for the fracture failure of the die. For this reason, on the one hand, all scratches and electric machining marks on the mold surface must be polished, even if they are in the gating system, they must also be polished. In addition, the die materials used shall have high strength, good plasticity, good impact toughness and fracture toughness

2. Corrosion failure

Common die-casting alloys include zinc alloy, aluminum alloy, magnesium alloy and copper alloy, as well as pure aluminum die-casting. Zn, Al and Mg are more active metal elements, which have good affinity with mold materials, especially Al is easy to bite. When the die hardness is high, the corrosion resistance is good, while if there are soft spots on the formed surface, the corrosion resistance is not good

3. Thermal fatigue cracking damage failure

During the die casting production, the die casting die is repeatedly subjected to the effect of cold and heat stimulation, and the formed surface and its interior are deformed. The mutual drag leads to repeated thermal stress, leading to the damage and loss of toughness of the organizational structure II, causing the appearance of microcracks and continuing to expand. Once the crack expands, molten metal is squeezed in, and repeated mechanical stress accelerates the crack growth. Therefore, on the one hand, the die must be fully preheated at the beginning of die casting. In addition, the die casting mould must be kept in a certain working temperature range during the die casting production process to avoid early cracking failure. At the same time, it is necessary to ensure that there are no internal problems before the mold is put into production and during manufacturing. In actual production, most die failures are thermal fatigue cracking failures

Huizhou Hardware Die Casting Factory, with years of experience in die casting mold manufacturing and professional technical advantages in product die casting, serves the public, provides each guest with high-quality die castings, and jointly creates a win-win cooperation mode. Welcome to order: die-casting, aluminum die-casting, die-casting parts, die-casting processing