METHOD FOR RESTORING JOINT OF PARTS SUCH AS SLIDE VALVE Russian patent published in 2007 - IPC B23P6/02 B23H9/12 C23C4/00 

FIELD: restoration works, possibly in machine engineering and repairing shops of agricultural-industrial complex.

SUBSTANCE: method comprises steps of applying copper layer onto surface of opening of slide valve body made of cast iron by electric spark working; then removing applied layer of copper till thermal diffusion zone and applying layer of low- or medium-carbon steel onto surface of slide. Such layer is applied by electric spark working in apparatus with discharge energy 0.81 - 1.66 J at electrode feed in range 0.2 - 0.4 mm/rev and at revolution number of slide 8 - 16 rev/min. Then lands of slide are smoothly rolled and lapped, and film of brass is applied onto them by anti-friction abrasive free finish working.

EFFECT: increased resource of slide valve.

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