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- Autors
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Lavrik V. P., Suglobov V. V., Shishkin V. V.
- Issue
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Hoisting and transport equipment, 2025, №1(69)
- Pages
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28-37
- DOI
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10.15276/pidtt.1.69.2025.03
- Abstract
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It is known that in 45% of cases the reason for decommissioning of tower cranes is the wear of the slewing ring. It was established that the wear and failure of the OPC is due to high values of contact stresses during the interaction of the bodies and the rolling surface. This leads to the loss of operability of the tower crane. The analysis of ways to restore performance by changing the structural elements of military equipment cannot be attributed to modern repair technology, as this leads to a violation of the interchangeability of parts and a decrease in the stiffness of the unit. It is shown that the high-performance method of repairing the OPK by automatic surfacing with the application of layers of a gradient structure allows to restore the worn node and reduce the probability of the appearance of a crack.
The use of ceramic flux in combination with wire of different composition allows changing the chemical composition of the deposited metal to a certain extent. Adjusting the composition of the deposited metal by changing the "flux - wire" combination is limited to a narrow range of low-carbon and low-alloy welding and surfacing wires that are produced in series. At the same time, it is possible to change the carbon content and slightly increase the content of chromium, manganese, and silicon only within certain limits. Expanding this possibility allows either the development of new ceramic fluxes, or, which is more economically efficient, the use of mixtures of fluxes - fused, siliceous, manganese and ceramic.
The obtained data showed that the use of a mixture of fluxes with different ratios allows to regulate the chemical composition of the deposited metal and its hardness within wide limits.
- Keywords
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performance of a construction crane, restoration of performance, modern repair technologies, automatic surfacing, layers of a gradient structure
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