Purpose. To simultaneously strengthen the surface of the part and restore dimensional parameters. Subsequent finishing treatment ensures optimal roughness of the hardened surface.
Specifications. Microarc oxidation of aluminum and its alloys is carried out in an electrolyte according to the following modes: storage unit capacity 60±8, F, voltage pulse amplitude 75±15V, tool vibration frequency 390±70 Hz, average depth of the hardened layer 0.22 pulse, 10 J. The coating composition includes carbides such as TiC, WC, W2C, which ensure its rigidity after ESA. Cobalt from the carbide electrode acts as a high-strength binder filler for carbides and, as evidenced by spectral analysis, is fairly evenly distributed throughout the thickness of the strengthened layers. The coating provides protection against corrosion and wear.
Application area. Machine-building, aircraft-building companies, defense companies and organizations. Strengthening parts during the manufacture of new ones or restoring worn ones at machine-building and repair enterprises, including for equipment operated in abrasive environments typical for the oil and gas industry.
Advantages. The technology is environmentally friendly and safe. The costs of machining and the cost of engineering products are reduced. The load-bearing capacity of the application increases.
Technical and economic effect. Provides high corrosion resistance and wear resistance of products, especially abrasive ones. The service life of equipment, machines and mechanisms increases, which ensures savings from the introduction of reinforced products.
Description. Strengthening of parts by electric spark alloying, subsequent finishing processing. Manufacturing of a workpiece/application of an electrospark coating to a workpiece. Flushing. Drying. Mechanical processing of the part (if necessary). Quality control. The use of specially designed electrodes makes it possible to supply a protective gas environment directly to the treatment zone, which avoids the formation of oxide compounds that impair the performance properties of hardened surfaces.