How to remove aluminum sheet stress?
Isothermal aging method 10-35%; 20-70% for elimination of vibration; cryogenic approach 25% to 83%. Therefore, the existing technology and methods are still unable to eliminate rough forging aluminum structure of the residual stress from the root of the present. But above the five common methods will try to eliminate the residual stress of aluminum alloy material.
In recent years, domestic and foreign literature summarizes the evaluation process for the elimination of residual stress effect, the existing aluminum structure rough forging residual stress relief techniques, mechanical stretching (compression) up to about 90% law, the downside is that the shape of the parts requirements simple, high uniformity requirements for the blank material composition and organization, scope narrow.
In addition to the above-described method, in recent years, the international community also reported thermomechanical treatment method, residual stress pulse magnetic treatment (PMT) method to eliminate technical, but relevant technology is not yet mature.
Elimination of residual stress aluminum sheet five common methods:
1. Aging elimination; 2. mechanical stretching; 3 cold molding method; 4 cryogenic processing method; 5 vibration elimination.
