FIELD: process engineering.
SUBSTANCE: invention relates to hardening of cutting tool. Cutting tool is subjected to plastic deformation to produce nanocrystalline structure on its surface. Said plastic deformation is carried out at intensive deforming attack by pulses of ultrasound frequency of 20-25 kHz produced by cylindrical penetrators that moves axially along normal line to machined surface with impact power of 0.3-0.9 kgf and local heating of contact point to 300-500°C.
EFFECT: higher hardness, deeper nanocrystalline structure of surface layer.
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