Service properties of composite electrochemical coating

E M Yudina,M R Kadyrov,Yu E Kisel,A S Serguntsov,A Gorokhov

doi:10.1051/matecconf/202134401022

E M Yudina, M R Kadyrov + Show 3 more

Open Access

https://doi.org/10.1051/matecconf/202134401022

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Abstract

The article considers the ways of solving problems, regarding the rework and durability improvement of elements of industrial equipment. One of the ways to restore and improve the operational properties of machinery parts is the application of galvanic coatings, in particular, composite galvanic coatings. The article shows ways to improve the performance properties of composites, determines the optimal content of the dispersed phase in the composite, in terms of the ratio of the strength of the dispersed phase and matrix. The composite electrochemical coating wear resistance and the roughness of composites under conditions of abrasive wear have been explored. The relationship between the wear resistance and the surface roughness during wear has been determined. In an experimental study of the composite coatings abrasive wear resistance, it was found that their wear largely depends on the size and volume content of dispersed particles in the coating. It has been experimentally proven that the composite coating roughness depends on the matrix mechanical properties, the content and size of disperse particles.

Highlights

The problem of worn-out parts rework and their durability improvement, as much as of units and aggregates of equipment in use under conditions of abrasion wear, is utterly important.Among the various methods of restoring these parts, it is necessary to choose technological processes that do not change the part microstructure and increase its strength characteristics
These disadvantages are associated with the performance properties of electroplated iron coatings, such as wear resistance, fatigue strength, and base material adhesion strength
The effect of strength properties of coatings on their wear resistance has been studied using the example of composite electrochemical coatings (CEC) iron-nickelelectrocorundum and iron-cobalt-electrocorundum, the detailed production technology of which has been described earlier in [5]

Summary

Introduction

The problem of worn-out parts rework and their durability improvement, as much as of units and aggregates of equipment in use under conditions of abrasion wear, is utterly important.Among the various methods of restoring these parts, it is necessary to choose technological processes that do not change the part microstructure and increase its strength characteristics. One of the methods of restoring worn parts is the metal electrolytic deposition (iron-plating, chrome-plating, etc.) on the restored surfaces. Electrolytic iron-plating makes it possible to restore parts of various sizes, shapes, with a wear rate of up to 3,0 mm. These disadvantages are associated with the performance properties of electroplated iron coatings, such as wear resistance, fatigue strength, and base material adhesion strength (the main material of the part). Under high loads associated with the deformation of the part, it can collapse In this regard, it is impractical to use pure iron coatings. The introduction of a solid filler (metal oxides, carbides and borides) into the iron matrix, as well as the creation of heterogeneous composite materials consisting of an elastic matrix (iron, nickel, copper) and a solid filler, can significantly increase the operational properties of these coatings

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