The forging stress of aluminum alloy forging includes thermal stress, transformation stress and compression stress. The reasons for various stresses are not the same.

(1) Thermal stress. Thermal stress is caused by the uneven thickness of the cross-section at the intersection of the casting and the difference in cooling, etc. Compressive stress builds up at thin walls, resulting in residual stress in the casting.

(2) Phase transformation stress. The phase transformation stress is due to the phase transformation of some cast aluminum alloys during the cooling process after agglomeration, resulting in a change in volume and size. The important thing is that the wall thickness of the aluminum casting is uneven, and the different parts are caused by phase transformation at different times.

(3) Compressive stress. When the aluminum casting is compressed, it is blocked by the mold and core and produces tensile stress. This stress is temporary, and the aluminum casting will actively dissipate out of the box. However, if the unpacking time is not right, it will often cause hot cracks, especially the aluminum alloy cast in the metal mold is often prone to hot cracks under the action of this stress.

It means that the residual stress in the cast aluminum alloy reduces the mechanical properties of the alloy and affects the machining accuracy of the casting. Residual stress in aluminum castings can be eliminated by annealing treatment. Due to the good thermal conductivity of the alloy, there is no phase change during the cooling process. As long as the casting layout is reasonable, the residual stress of the aluminum casting is generally small.

Sichuan Hongyi Intelligent Machinery Co., Ltd. is professional China JAGUAR Front Control Arms Manufacturers and OEM JAGUAR Front Control Arms Factory. Hongyi Intelligent Machinery is strong in technology and R&D, is the OE supplier of FAW Group Corporation and is recognized as a "high-tech enterprise" by the government. The company integrates a precision forging plant and a mechanical processing plant, based on high-grade and high-end markets, with an annual output value of up to 80 million yuan. For any customer orders for custom JAGUAR Front Control Arms, we will complete them on time, quality and quantity.