DWSK Sprocket

DIN Sprockets tells the knowledge of Sprockets to evaluate the distortion in heat treatment overshoot!



Sprockets are wheels with cog-type buckle teeth that are used to mesh with blocks of precise pitch on link links or cables.

Sprockets are wheels with cog-type buckle teeth that are used to mesh with blocks of precise pitch on link links or cables. The changes in the volume and shape of Sprockets during the heat treatment are due to the volume expansion and contraction caused by the specific volume change during the microstructure transformation process in the steel, and the plastic deformation caused by the heat treatment stress. Obviously, during the phase transformation process of heat-treated steel, the change of specific volume is inevitable. Therefore, the greater the heat treatment stress, the more uneven the phase transition and the greater the heat treatment deformation. When the heat treatment stress is fixed, the greater the plastic deformation resistance of the steel, the smaller its deformation. Therefore, in order to reduce deformation, it is necessary to reduce the quenching stress and improve the plastic resistance of steel. The distortion of Sprockets during heat treatment can be evaluated from the following aspects. Follow the editor of DIN Sprockets to find out!

1. The yield strength of steel is used as an indicator of resistance to microplastic deformation. Generally speaking, when a metal material produces a certain amount of residual plastic deformation due to the effect of a certain force, its yield strength is regarded as electrical resistance. Only when the internal stress reaches or exceeds the material's yield strength or resistance to plastic deformation, heat treatment deformation can occur in Sprockets. The main factors that determine the yield strength of steel are the chemical composition, microstructure, temperature and stress state of the steel. The higher the yield strength, the greater the resistance to plastic deformation and the smaller the deformation.
2. Sprockets internal stress The internal stress of the workpiece (mainly including processing stress and heat treatment stress) is another important factor that promotes the deformation of the workpiece. The greater the internal residual stress of the workpiece before quenching, the greater the deformation after quenching. When the internal stress reaches or exceeds the plastic deformation resistance or yield strength of the steel, the workpiece undergoes plastic deformation, that is, the size and shape of the workpiece change.
The above is the DIN Sprockets editor's introduction to Sprockets' distortion assessment knowledge during heat treatment. I hope you can learn more.