Effect of annealing treatment on aluminum alloy castings

Effect of annealing treatment on aluminum alloy castings

It is to eliminate the casting stress of castings and the internal stress caused by machining, stabilize the shape and size of machined parts, spheroidize some Si crystals of Al Si alloys, and improve the plasticity of alloys. The process is as follows: heat the aluminum alloy casting to 280-300 ℃, keep it warm for 2-3H, and cool it to room temperature with the furnace, so that the solid solution decomposes slowly and the precipitated second particles gather, so as to eliminate the internal stress of the casting and achieve the purpose of stabilizing the size, improving plasticity, reducing deformation and warpage.