We all know that 2A12 aluminum plate material is obtained by heat treatment, and it is sometimes necessary to remove the residual internal stress before processing. Next, 2A12 aluminum plate manufacturers will introduce to you the method of removing the residual internal stress of 2A12 aluminum plate.

Common aging elimination method, mechanical stretching method and mold cold pressing method can be, today would like to introduce to you, vibration elimination method and cryogenic treatment method.

1, vibration elimination residual stress method

The method of eliminating residual stress by vibration is to make the residual stress in some parts of 2A12 aluminum plate superimposed with vibration load by a portable strong vibrator, and the plastic strain is caused by exceeding the yield stress of the material, so as to reduce and redistribute the internal stress.The results show that when 2A12 aluminum plate is quenched within 2 hours, vibration treatment is the best effect, the residual stress can be reduced by 50-70%;If the vibration test is carried out for 360 hours after quenching, the residual stress can only be eliminated by 10%-20%.Vibration stress relief has no limitation on the shape and size of the parts, and it is especially suitable for large and complex structural parts.In addition, the vibration-aged 2A12 aluminum plate has high stability and is not easy to produce deformation during processing.

2, cryogenic treatment method

Cryogenic treatment, also known as cold stable treatment, can be divided into low temperature rapid heating method and cold and heat cycle method two.Cryogenic and rapid heating method is to immerse 2A12 aluminum plate parts into cryogenic liquid nitrogen at -196℃, and then use hot steam to spray the internal and external environment temperature distribution. The residual stress is offset by the opposite thermal stress generated by rapid heating and rapid cooling.Residual stresses can be reduced by 20-84%.The advantage of cryogenic treatment is that it can not only eliminate residual structural stress, but also improve the strength, hardness and stability of 2A12 aluminum sheet material.Cryogenic treatment has no restrictions on the size and shape of parts and is suitable for complex shapes of forgings and castings.Cryogenic treatment before cutting can obviously improve the deformation tendency and improve the stability of the material structure.

The method of removing residual internal stress of 2A12 aluminum plate is introduced here. If you want to consult other information of 2A12 aluminum plate, you can contact us.