SUPERFICIAL LAYERS HARDENED BY ELECTRICAL SPARKING

Abstract

The paper presents some theoretical and experimental aspects about sustainable growth in the surface layer, obtained by electrical discharge pulses. Thus increase occurs due to the thermal effect at pulsed discharges. The area of the material under the white layer is subjected to a pronounced heating followed by rapid cooling by taking heat from the base material. In this way there is a hardening of the metallic material located in the immediate vicinity of the white surface layer.

Keywords

• electrode
• layer
• spark
• microhardness