Heat treatment process in the form of actual production application is very large, but their basic process is consist of the heating, insulation and cooling. The whole process can be used heating rate, heating temperature, holding time, cooling rate, and several other parameters to be described. In the heat treatment process, to use all kinds of furnaces, metal heat treatment furnace will be conducted in such as basic heat treatment annealing, quenching, tempering, chemical treatment and the like. Therefore, the temperature measured within the furnace becomes an important measurement of the heat treatment process parameters. Each heat treatment process specification, the temperature is very important element. If the temperature measurement is not accurate, and heat treatment process specifications will not get the correct implementation, as well as causing decline in product quality or even scrapped. Temperature measurement and control is the key to the heat treatment process, but also a key factor in deformation.

Lowering the temperature of the workpiece after the process temperature is relatively reduced strength loss, enhanced resistance plastic. Such deformation of the workpiece anti-stress, anti-deformation hardening, high temperature creep comprehensive capacity enhancement, deformation will be reduced; heating the workpiece after the process temperature decreases, the temperature range of cooling reduced the temperature of various parts of the consequent inconsistency will reduced, thereby resulting in thermal stress and stress is also reduced, so that deformation will be reduced; if the process temperature is reduced, and the heat treatment process time is shortened, the time of the workpiece temperature creep reduction, distortion will be reduced. Reduce heat deformation reasonably required heat treatment process.