The principles of the STP surface processing technology is to raise the hardness and the effects of internal leftover compress stress relaxation. It functions by clamping metal pieces such as springs and heated under suitable temperature (100-200°C) in the designated STP kiln and altering the chemical structures of the surface (about 10-30 um). It will improve the elastisity of leaf spring and its abrasion resistance

Results of the STP Surface Processing:
1.Prolong the tool’s life and improve the intensity of fatigue-resistance
2 Obviously improve the hardness of surface., intensity, and improve its abrassive resistance.
3. Strengthen the intensity and density of grain, and improve its corrosion resistance.
4. Can improve the mobility of material , reduce its sliding resistance to the surface micro-structure.