Tool grades
CVD & PVD Comparison
Click below to read more about the comparison between PVD and CVD coating regarding residual stress. You can also read more about 2 different kinds of surface treating*.
Residual stress
Residual stress
Coating of a tool grade is carried out at relatively high temperatures. Therefore when coating is finished and the insert is left to cool, due to the difference in the thermal coefficient of the substrate and the coating layer, a residual stress remains.
CVD
PVD
x
CVD-coating
PVD-coating