Hardening
Surface engineering technologies change the various parts surface properties through coating or other processing. Parts working surface defines important properties of the product, such as wear resistance, corrosion resistance, heat resistance, etc. Using various combinations of surface engineering methods, it is possible to obtain completely new characteristics of the products.
Generally, the result of applying functional coatings is an improvement in their performance.
So makes it possible to use cheaper analogues as the parts main material with functional coatings allowing improved performance.