Abstract
The paper presents the results of metallographic and tribotechnical studies of coatings of a multicomponent charge containing a powder based on iron and nickel in a ratio of 3:1 and a powder of ultrafine titanium carbide. The slip coatings were melted with a defocused and oscillating laser beam along the normal to the velocity vector of its movement on steel 45 and 65Mn. The influence of the laser beam power, processing speed, and diameter on the geometric parameters of the deposited coatings is determined using regression equations. The cross-sectional area of the deposited coating with an oscillating beam is higher than that of the surfaced coating with an unfocused beam. Sliding friction tests were carried out using a lubricant at normal atmospheric pressure and temperature according to the scheme plane (deposited sample)—the end of the rotating sleeve (steel 100Cr6). Abrasive wear was performed according to the planar-annular disk surface scheme. Quartz sand was fed into the friction zone using a dispenser. The regularities of the change in the coefficients of friction from the sliding speed are established, showing a decrease in the coefficients of friction with an increase in the microhardness of the coatings. With increasing pressure, the friction coefficients decrease, but at a certain critical pressure, they increase. The wear and tear resistance increases with the increase in the microhardness of the coatings. The abrasive resistance of the coatings is higher than the hardened steel 65Mn.
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Change history
12 October 2021
In the original version of this book, the following belated correction has been incorporated in Chapter 46: The author name has been changed from “Biryukov Vladimir” to “Vladimir Biryukov”.
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Biryukov, V. (2022). Modeling of Parameters of Laser Surfacing Zones and Determination of Tribotechnical Properties of Coatings Obtained by Laser Additive Technologies. In: Mottaeva, A. (eds) Technological Advancements in Construction. Lecture Notes in Civil Engineering, vol 180. Springer, Cham. https://doi.org/10.1007/978-3-030-83917-8_46
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