Damaged Forms Of Die Casting

During the production of die-casting, the mold is repeatedly subjected to the action of cooling and heating, the molding surface and its interior are deformed, and they are involved in each other, resulting in repeated thermal stress, resulting in damage to the structure and loss of toughness, causing micro-cracks to appear and continue to expand. Once the crack expands, the molten metal squeezes in, and repeated mechanical stress accelerates the crack growth. To this end, on the one hand, the mold must be sufficiently preheated at the beginning of the die casting. In addition, the mold must be kept within a certain operating 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 problems with the internal factors before the mold is put into production and during the manufacturing process. In actual production, most mold failures are thermal fatigue crack failures.