Wear resiatant composite structures

The surface intended to be used in friction parts is subjected to DC process with obtaining deep (up to 2 mm) and narrow (3-100 microns) grooves. After that the part is subjected to traditional chemical and thermal treatment (carburizing, nitriding, carbonitriding, boronizing or other). This allows to obtain a composite structure of friction surface with vertical hard layers. Grooves may be filled with solid lubricants.

Fig. 1 - Wear resistant and self-lubricating composite structure

Fig.2 - Variants of steel hardened surfaces

Fig. 3 - Thickness comparison of the hardened (carbonitriding) layers. Traditional hardening (at the left) and hardening after DC machining (at the right). Same time of carbonitriding.

Examples of the obtained structures

Fig. 4 - Comparative wear resistance of the coatings obtained low-temperature carbonitriding.