Abstract
In the machine, metallurgical, and shipbuilding industries, steel products with alloy and composite coatings based on nickel may be used. It is expedient to improve the physicochemical properties of the surface layer of products as they have a significant roughness value after thermal spraying. It is therefore important to finish the layers applied by flame spraying, where machining is used for this purpose. However, it causes a loss of coating material, which is quite expensive. Therefore, in order to reduce costs and improve the quality of the surface layer, the finishing treatment of nickel-based coatings by means of plastic working is used. Two types of plastic working were proposed: rolling and burnishing. Numerical and experimental tests of the plastic processing of alloy coatings were carried out. The roughness of the coatings after rolling decreased to 1/25 and 30% strengthening of the alloy coating matrix was determined. After burnishing, roughness was reduced to 1/12 and the alloy coatings were strengthened by 25%. Plastic working by rolling and burnishing has a beneficial effect on the surface quality of the workpiece, not only by significantly improving the roughness, but also by increasing the strength properties of the surface layers.
Highlights
An important issue in theoretical considerations and experimental research of plastic working was to determine dependencies between technological parameters and the properties of the surface layer of materials
The stageanalysis concerning the modeling of thebysurface plastic working processes was to conduct a a numerical of pressure burnishing finishing rolling nickel-based alloy coatings
The stage concerning the modeling of the surface plastic working processes was to conduct according to the scheme in numerical analysis of pressure burnishing by finishing rolling nickel-based alloy coatings according to a numerical analysis of pressure burnishing by finishing rolling nickel-based alloy coatings the scheme inaccording scheme in Figure 7 [13,16,17]
Summary
An important issue in theoretical considerations and experimental research of plastic working was to determine dependencies between technological parameters and the properties of the surface layer of materials. The close cooperation of designers with process engineers at the construction and technological stage of production preparation can significantly affect the improvement quality of manufactured products. Already at the design stage, it is necessary to specify the quality requirements for components used in the construction of machinery and equipment. The production engineer should choose the most economical production methods that enable the product to be made according to technological quality requirements. The technological quality of machine parts depends on the machining methods used and the treatment parameters used. These parameters and methods produced under constant operating conditions have a significant impact on the durability and reliability of machine parts, sets, and ready devices
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