Industry standards for precision casting manufacturers

Casting speed: The casting speed of aluminum alloy die castings is positively correlated with the ingot liquid cavity. If the casting speed is increased, it will cause the direction of the ingot liquid cavity and temperature gradient to expand, and then the liquid cavity range will be displayed at the bottom of the liquid cavity, generating significant internal stress and increasing the probability of showing hot cracks in the ingot. Therefore, everyone should control the speed well.

Casting temperature: The casting temperature of excellent aluminum alloy die-casting parts will maintain excellent flowability of liquid metal, subsequently reducing internal stress in the mechanism and avoiding cracks. The general casting temperature should be determined based on the type of material and ingot specifications. If the temperature is not suitable, it will add thermal stress, which may cause cracks or cracking in the casting. If the temperature is too low, it is not feasible because it will cause defects such as cold shuts, weld beading, and even cracks on the surface of the ingot. If not optimistic, it will make it impossible for the casting to proceed again.

Relative height of liquid level: The position of the liquid level is also important. If it is too low, it will cause thermal cracks in precision mechanical casting to tend to expand, and if not optimistic, it will endanger the casting process. If the liquid level is too high, it will increase the shrinkage level of the ingot. Therefore, it is necessary to have a suitable relative height of the liquid level, neither too high nor too low.

During the aging treatment and heat treatment cooling of cast aluminum alloy profiles, the faster the cooling rate, the greater the stress caused and the greater the deformation of the parts. Reducing the cooling rate can reasonably reduce part deformation while ensuring that the second phase does not precipitate during the entire cooling process. The aging treatment of cast aluminum alloy profiles usually uses water as the cooling material, and the cooling ability of water is greatly affected by its temperature.

The heat treatment process of large and medium-sized aluminum alloy castings can reasonably reduce the deformation of the heat treatment process of large and medium-sized aluminum alloy castings by improving the main parameters of the heat treatment method, adopting processing strategies such as increasing the isothermal process link, manipulating the heating speed and the mixing temperature of the parts, and increasing the temperature of the heat treatment water (and also improving the clamping and placing method of the parts, and its application calibration, etc.).