METHOD OF RESTORATION OF WORKING WALLS OF CRYSTALLISER MADE OF COPPER OR ITS ALLOYS Russian patent published in 2008 - IPC B23P6/00 B23H9/00 B22D11/59 

FIELD: technological processes; metallurgy.

SUBSTANCE: method includes mechanical treatment of worn out sections of working surfaces of walls and application of two-layer wear-resistant coating on them. Application of coating is performed with hard-alloy electrodes at the set of electrospark alloying with rotation of electrode-tool around its axis, its vibration and displacement on the surface of worn sections of working walls of crystalliser in transverse and longitudinal directions. At that process is carried out according to the following modes: idle run voltage 50-210 V, short circuit current 1-20 A, frequency of electrode-tool vibration 50-500 Hz, frequency of electrode-tool rotation around its axis 100-500 s^-1, and displacement in transverse and longitudinal directions with frequency of 10-600 Hz, amplitude of 2-90 micrometer and speed of processing 50-350 mm²/min. Hardness of the first layer makes 35-48 HRC, and of the second layer - 48-55 HRC.

EFFECT: simplification of technology and increase of crystallisers resistance.

2 cl, 1 tbl, 1 ex