Research Article

Formation of Surface Ultrafine Grain Structure and Their Physical and Mechanical Characteristics Using Vibration-Centrifugal Hardening

Figure 6

Wearing kinetics for friction pair 40 Kh steel-40 Kh steel after VCH and hardening ((a) ring; (b) insert) under a load of 2 MPa in the oil environment: (1) VCH; (2) hardening with low tempering (200°C).
(a)
(b)