aluminium high pressure die casting process

　　Stress Relief Technologies for Aluminum Die - Castings

　　Stresses in aluminum die - castings can occur due to various factors such as rapid cooling during the casting process, uneven wall thickness, and mechanical handling. These stresses can lead to dimensional instability, cracking, and reduced mechanical properties. One of the commonly used stress - relief methods is heat treatment. Annealing is a popular heat - treatment process for aluminum die - castings. In annealing, the castings are heated to a specific temperature within the aluminum alloy's recrystallization range and then slowly cooled. This process allows the internal stresses to be relieved as the crystal structure of the aluminum undergoes rearrangement.

　　Another technique is vibration stress relief. This method involves subjecting the casting to mechanical vibrations. The vibrations cause the internal stress - bearing points in the casting to undergo micro - plastic deformation, gradually reducing the overall stress level. Vibration stress relief is a relatively simple and cost - effective method, especially suitable for large - scale production. It can be carried out using specialized vibration equipment, and the vibration parameters such as frequency, amplitude, and duration can be adjusted according to the size and material of the casting.

　　Shot peening is also a useful stress - relief and surface - strengthening technique. In shot peening, small spherical shots are propelled at high speed onto the surface of the casting. This impacts the surface, causing plastic deformation and introducing compressive stresses on the surface. The compressive stresses can counteract the tensile stresses within the casting, reducing the overall stress state and improving the fatigue resistance and durability of the casting.

Read recommendations:

radiator cpu

aluminium roof profiles

Automotive Mechanical Parts

decorative metal works near me.What is the reason for the unstable paint spraying of aluminum alloy die castings?

What is the custom process for zinc alloy die-casting plants