Straightening and flattening after heat treatment refers to the use of mechanical forces, such as stretching and compressing, on metal materials that have been subjected to high-temperature heating, in order to achieve a flat, straight, and precise shape and size. The principles involved are as follows:
Heat treatment can cause the grain structure of metal materials to coarsen, making them soft and more easily deformable. By applying stretching, compression, and other operations, internal stresses and deformations in the material can be eliminated, allowing it to achieve a flat, straight, and precise shape and size.
During the flattening process, it is essential to control the forces, speeds, and directions of stretching and compression appropriately to ensure the accuracy of the metal material’s shape and dimensions. Additionally, the material should undergo suitable cooling treatment after flattening to maintain the desired shape and size.