Operation in aggressive environmental conditions and the interaction of friction pairs impose increased demands on modern parts used in aircraft engine manufacturing and electrical power engineering. Often, working in such conditions leads to the premature failure of parts and equipment, as well as energy loss due to friction and wear processes. Advanced technologies for surface modification and coating deposition by various methods can enhance the performance characteristics of such parts. The technology of laser cladding for wear-resistant coatings, combined with preliminary surface modification, allows the creation of a protective layer on the surface and strengthens it. This paper provides an overview of modern methods for surface modification and deposition of protective coatings using various physical techniques, highlighting their advantages and disadvantages. The most promising method is the laser cladding of wear-resistant coatings with preliminary surface modification. An algorithm for the laser cladding process has been developed for this technology. The paper proposes the use of a new wear-resistant coating made from powder materials based on chromium and molybdenum carbides. The influence of the mixture composition on the properties of the synthesized coating has been determined. Adhesion strength and coating thickness have been evaluated.
Laser Powder Bed Fusion (LPBF) technologies are now being widely adopted across the global industrial landscape. New LPBF systems with multiple lasers and an expanded work area are entering the market, thereby enhancing both the production speed and the maximum size of 3D parts that can be produced. The aim was to investigate the aspects of upscaling LPBF processing parameters on the characteristic formation of stable single tracks, which are the primary building blocks for this technology. A number of LPBF systems were employed in this study, each operating independently and utilizing distinct parameter regimes, to produce the single tracks on a solid substrate deposited with a thin powder layer. The results demonstrated that the geometrical characteristics of single tracks are predominantly influenced by laser power and scanning speed when scanning a thin powder layer. The results also indicate that higher laser power and spot size can be used to produce stable tracks with increasing linear energy input. However, there are a number of nuances to be considered in increasing the performance.
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