Development and Research of Technology for Restoration and Strengthening of Worn Machine Parts by Composite Electroplating Coatings Using Micro - and Nanofractions Containing Tungsten- Containing Electroerosive Powders as the Strengthening Phase

The purpose. To develop and research a new technology for restoring and strengthening worn machine parts with composite electroplating coatings using micro - and nanofractionated tungsten-containing electroerosive powders as the strengthening phase.

Methods. When setting up the experiments, a sample was used – a metal circle with a thickness of 5 mm and a diameter of 50 mm. The area of the side on which the coating was applied is 0.1963 . The composition of the electrolyte used in the experiments: iron sulfate 450 g / l; sodium chloride 250 g/l; temperature 100℃; current density 20 A/ ; current output 90-98%.

Transformer steel plates were used as anodes. The plates have an easy-to-use shape, are accessible, and have a chemical composition close to pure iron. Hard-alloy powders of micro-and nanofractions were obtained on an electrodispersion unit (Patent for invention of the Russian Federation No. 2449859) from the waste of the T30K4 alloy in water.

Results. When setting up the experiments, a coating was applied using a standard composition, and then a coating with the addition of an electroerosive powder obtained from a T30K4 hard alloy in an amount of 5 g/l of the solution. The structure and properties of the resulting composite electroplating coatings were investigated as a result of the research aimed at improving the technology of restoring automotive parts by the method of ironizing by introducing a strengthening additive based on electroerosive materials into the electrolyte. The results obtained in the course of the work make it possible to obtain composite electroplating coatings based on sulfuric acid electrolytes with the addition of a powder material obtained by the EED method from the T30K4 alloy.

Conclusion. The study of composite electroplating is an important and relevant topic. This type of coating has many advantages over the classic, single-component coatings. The introduction of special additives in the electrolyte makes it possible to increase the strength of coatings, their resistance to high temperatures, increases their resistance to longterm operation in conditions of oil starvation, some types of composite electroplating coatings can also give the surface dirt-repellent properties.

1. Lyalyakin V. P. Vosstanovlenie detalei mashin – vazhnoe napravlenie importozameshcheniya v agropromyshlennom komplekse [Restoration of machine parts - an important direction of import substitution in the agro-industrial complex]. Remont. Vosstanovlenie. Modernizatsiya = Repair. Recovery. Modernization, 2019, no. 9, pp. 3–5.

2. Slinko D. B., Dorokhov A. S., Denisov V. A., Lyalyakin V. P. Praktika primeneniya plazmno-poroshkovoy naplavki pri vosstanovlenii iznoshennykh detalnykh mashin [Practice of application of plasma-powder surfacing in the restoration of worn machine parts]. Tekhnologiya mashinostroeniya = Mechanical engineering technology, 2019, no. 3, pp. 32–37.

3. Azarov Ya. A., Polekhov I. N., Teplyakov K. S. Sovremennye i perspektivnye metody vosstanovleniya i uprochneniya detalei mashin [Modern and promising methods of restoration and strengthening of machine parts]. Nauka cherez prizmu vremeni = Science through the lens of time, 2018, no. 7 (16), pp. 39–41.

4. Kotomchin A. N., Sinelnikov A. F. Usovershenstvovanie kholodnogo samoreguliruyushchegosya elektrolita khromirovaniya pri uprochnenii i vosstanovlenii detalei mashin [Improvement of the cold self-regulating electrolyte of chrome plating during the hardening and restoration of machine parts]. Mir transporta i tekhnologicheskikh mashin = The world of transport and technological machines, 2019, nо. 4 (67), pp. 17–24.

5. Tolcheev A. V. Tolstosloinoe vosstanovlenie krupnogabaritnykh detalei mashin gal'vanomekhanicheskim zhelezneniem [Thick-layer restoration of large-sized machine parts by electroplating]. Tyazheloe mashinostroenie = Heavy engineering, 2008, no. 10, pp. 26–28.

6. Ganin A. N., Gromakovskii D. G., Potapkin A. S., Shigin S. V., Khaustov V. I. Razrabotka sposoboda i ustanovki dlya zhelezneniya posadochnykh surfactov krupnogabar'nykh osnoveniy [Development of a method and installation for the iron-bearing of large-size bearings]. Remont. Vosstanovlenie. Modernizatsiya = Repair. Recovery. Modernization, 2007, no. 4, pp. 19–22.

7. Chegoshev M. Yu., Petukhov R. A. Upravlenie tekhnologicheskimi parametrami protsessa zhelezneniya na osnove mikrokontrollernykh sredstv regulirovaniya [Control of technological parameters of the iron-making process on the basis of microcontroller means of regulation]. Remont. Vosstanovlenie. Modernizatsiya = Repair. Recovery. Modernization, 2011, no. 10, pp. 22–25.

8. Denisov V. A., Reshikov E. A., Ageeva E. V. Sravnitel'naya otsenka tribotekhnicheskikh svoistv pokrytii, poluchennykh zhelezneniem [Comparative evaluation of the tribological properties of coatings made with dry topping]. Trudy GOSNITI = Proceedings GOSNITI, 2016, vol. 124, no. 2, pр. 46–51.

9. Serebrovsky I. V., Serebrovsky A. V., Konyashenko P. Y., Dzhioev S. I. Vosstanovlenie kolenchatykh valov puskovykh dvigatelei elektroliticheskim zhelezneniem na asimmetrichnom toke [Restoration of the crankshafts of starting engines by electrolytic iron at an asymmetric current]. Regional'nyi vestnik = Regional Bulletin, 2017, no. 2 (7), pp. 3–5.

10. Gnezdilova Yu. P., Serebrovsky A. V., Lachkov V. D., Karpenko P. V. Vosstanovleniya sterzhnei klapanov elektroliticheskim zhelezneniem [Restoration of valve rods by electrolytic ferruginization]. Regional'nyi vestnik = Regional Bulletin, 2017, no. 3 (8), pp. 26–27.

11. Yudin V. M., Kulakov K. V. Vosstanovlenie vnutrennikh poverkhnostei otverstii detalei zhelezneniem [Reconstruction of the inner surfaces of the holes parts with dry topping]. Tekhnicheskii servis mashin = Technical service of machinery, 2019, no. 1 (134), pp. 163–169.

12. Ageev E. V., Latypov R. A., Ugrimov A. S. Metallurgicheskie osobennosti polucheniya tverdosplavnykh poroshkov elektroerozionnym dispergirovaniem splava T15K6 v butanole [Metallurgical peculiarities of obtaining carbide powders by electroerosion dispersion of alloy T15K6 in butanol]. Elektrometallurgiya = Electrometallurgy, 2016, no. 4, pp. 28–31.

13. Ageev E. V., Semenikhin B. A., Latypov R. A. Metod polucheniya nanostrukturnykh poroshkov na osnove sistemy WC-Co i ustroistvo dlya ego osushchestvleniya [Method of obtaining nanostructured powders based on the WC-Co system and a device for its implementation]. Fundamental'nye i prikladnye problemy tekhniki i tekhnologii = Fundamental and applied problems of engineering and technology, 2010, no. 5 (283), pp. 39–42.

14. Ageev E. V., Latypova G. R., Davydov A. A., Ageeva E. V. Otsenka effektivnosti primeneniya tverdosplavnykh elektroerozionnykh poroshkov v kachestve elektrodnogo materiala [Evaluation of the effectiveness of the use of hard-alloy electroerosive powders as an electrode material]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta. Seriya: Tekhnika i Tekhnologii = Proceedings of the Southwest State University. Series: Engineering and Technologies, 2012, no. 1, pp. 19–22.

15. Ageev E. V., Latypova G. R., Davydov A. A., Ageeva E. V. Provedenie rentgenospektral'nogo mikroanaliza tverdosplavnykh elektroerozionnykh poroshkov [Conducting X-ray spectral microanalysis of hard-alloy electroerosive powders]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2012, no. 5 (44), pt. 2, pp. 099–102.

16. Ageev E. V., Semenikhin B. A., Ageeva E. V., Latypov R. A. Issledovanie khimicheskogo sostava poroshkov, poluchennykh elektroerozionnym dispergirovaniem tverdogo splava [Investigation of the chemical composition of powders obtained by electroerosive dispersion of a hard alloy]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2011, no. 5 (38), pt. 1, pp. 138a–144.

17. Ageeva E. V., Latypov R. A., Burak P. I., Ageev E. V. Poluchenie tverdosplavnykh izdelii kholodnym izostaticheskim pressova-niem elektroerozionnykh poroshkov i ikh issledovanie [Obtaining hard-alloy products by cold isostatic pressing of electroerosive powders and their research]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2013, no. 5 (50), pp. 116–125.

18. Ageev E. V., Gadalov V. N., Ageeva E. V., Bobryshev R. V. Poroshki, poluchennye elektroerozionnym dispergirovaniem otkhodov tverdykh splavov – perspektivnyi material dlya vosstanovleniya detalei avtotraktornoi tekhniki [Powders obtained by electroerosive dispersion of solid alloy waste-a promising material for restoring parts of automotive equipment]. Izvestiya Yugo-Zapadnogo gosudarstvennogo universiteta = Proceedings of the Southwest State University, 2012, no. 1 (40), pt. 1, pp. 182–189.

19. Ageeva E. V., Horyakova N. M., Ageev E. V. Morphology of Copper Powder Produced by Electrospark Dispersion from Waste. Russian Engineering Research, 2014, vol. 34, no. 11, pp. 694–696.

20. Ageev E. V. Ustanovka dlya polucheniya nanodispersnykh poroshkov iz tokoprovodyashchikh materialov [Installation for the production of nanodisperse powders from conductive materials]. Patent RF, nо. 2449859, 2010.