Introduction to cooling curve
Cooling curve, the relationship between the cooling temperature and time after the workpiece is heated in the metal heat treatment process. Can be drawn in equidistant, single logarithmic or double logarithmic coordinates.
The cooling curve can represent: the cooling method during quenching, the cooling capacity of the quenching medium, the structural transformation of the steel during continuous or isothermal cooling, the brittleness sensitivity of the weldment during air cooling after welding, and the precipitation of the strengthening phase during cooling after high temperature quenching Wait. In addition, in the thermal analysis of metals, the temperature drop and time parameter curve of molten metal from liquid to solid is also called cooling curve, and its horizontal line is the crystallization temperature.