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Electrospark coating

Essence

It is based on the use of plasma pulsed spark discharges in the air and deposition of consumable electrode material on the product surface.

Purpose

Application of coatings, mainly, 30-100 microns thick with the use of electrode materials from hard alloys, steels and cast irons, based on carbides, borides, copper alloys, nickel, tin, silver, graphite, etc.

Technology

The optimum mode of coating application is based, for example, on reached the specified coefficient of microhardness increase, required roughness parameters when the specific energy of a single pulse is used and its duration. The electrode material is selected in accordance with the desired application of the applied coating.

Distinctive features

• possibility of local formation of coatings in strictly specified places, without protecting the rest of the surface;

• high adhesion to the base material;

• no heating and deformation of the product during coating application process;

• possibility of using various conductive materials as electrodes, both from pure metals and their alloys, powder materials, etc.;

• relative simplicity of the technology, which does not require special pre-treatment of the surface.