1_2023_sen_8

Title of the article RELAXATION OF RESIDUAL STRESSES DURING COOLING OF A WORKPIECE WITH A COATING APPLIED BY CENTRIFUGAL INDUCTION SURFACING METHOD
Authors

SOSNOVSKY Igor A., Senior Researcher of the Laboratory of Gas-Thermal Methods of Machine Component Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

BELOTSERKOVSKY Marat A., D. Sc. in Eng., Prof., Head of the Laboratory of Gas-Thermal Methods of Machine Component Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KURILYONOK Artem A., Ph. D. in Eng., Senior Researcher of the Laboratory of Gas-Thermal Methods of Machine Component Hardening of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

KOMAROV Aleksandr I., Ph. D. in Eng., Head of the Laboratory of Modification Techniques of Structural Materials of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.

ORDA Dmitriy V., Researcher of the Laboratory of Modification Techniques of Structural Materials of the R&D Center “Mechanical Engineering Technologies and Processing Equipment”, Joint Institute of Mechanical Engineering of the NAS of Belarus, Minsk, Republic of Belarus, This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it.
In the section MECHANICAL ENGINEERING MATERIALS AND TECHNOLOGIES
Year 2023
Issue 1(62)
Pages 55–62
Type of article RAR
Index UDK 621.793
DOI https://doi.org/10.46864/1995-0470-2023-1-62-55-62
Abstract As a result of a theoretical analysis of the cooling process of parts with deposited coatings applied by the method of centrifugal induction surfacing, the patterns of formation of residual stresses are established, taking into account relaxation. It is shown that a decrease in the cooling rate after surfacing makes it possible to reduce the level of residual stresses due to the relaxation phenomenon. Calculation relations are derived that allow predicting the permissible value of residual stresses depending on the required adhesive strength. As the analysis of the ratios obtained shows, the reduction of residual stresses in the resulting coatings due to their relaxation can be achieved by reducing the cooling rate or, accordingly, increasing its time. In the technological process of induction surfacing, a two-stage cooling mode of the workpiece was used; at the first stage, cooling is carried out at the maximum possible rate. If the temperature stresses reach the maximum allowable value τmax, the pairing condition for the transition from the previous cooling stage to the next one is the equality τmax = τi, where τi is determined from the equations derived in the work. In this case, one should be guided by the observance of the condition τi < τc, where τc is the theoretical adhesive strength of coatings in the absence of residual stresses. An example of the practical use of the twostage cooling after the process of applying coatings by centrifugal induction surfacing on the bushings of tamping blocks of a STS track machine is given.
Keywords coatings, residual stresses, relaxation, centrifugal induction surfacing, adhesion strength, bimetallic parts, tamping block bushings, STS track machine
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