What is the heat treatment deformation of steel plate?

The steel plate must be quenched in the process of processing and manufacturing. Sometimes, due to poor technology, the steel plate often has too high and too low heat, which leads to the deformation of the steel plate. In such cases, we need to find out the reasons and methods.

There are two types of heat treatment deformation of steel plate: one is the change of size, the other is the change of part geometry. With different heat treatment technology, the deformation and anti deformation methods of steel plate product size and geometry are also different.

In the process of heat treatment and austenitizing, the longer the holding time and the higher the temperature, the more carbon dissolved in austenite, and the larger the expansion of martensite. During cooling, martensite expands, followed by upper bainite, while volume changes of lower bainite and troostite are very small.

Generally, the martensite shrinks when the steel plate is tempered at low temperature, and the amount of shrinkage is directly proportional to the supersaturated carbon content. When heated at room temperature - 200 ℃, some of the retained austenite will turn into martensite and expand. However, due to the decomposition of martensite near 200 ℃, the expansion has little change.