DOI: 10.18503/1995-2732-2025-23-3-87-96
Abstract
Relevance. Cylindrical low-rigidity products are widely used in mechanical engineering as blanks for manufacturing parts such as shafts, axles, rods, bars, etc. Hardening of parts is one of the key methods for increasing the operational reliability and durability of such types of parts. Application of the method of hardening of surface plastic deformation (SPD) allows forming a favorable stress-strain state (SSS) in the surface layer of parts. Irkutsk NRTU has developed methods for straightening and hardening of non-rigid parts based on transverse rolling with smooth plates. The difference between these methods lies in the geometric shape of the working tool. Incorrect choice of geometric parameters of the tool can lead to uneven hardening, local stress concentrations and, as a consequence, to the formation of cracks, residual deformations or a decrease in the efficiency of the process. The objective of the work is to select and justify the angle of the wedge section of flat plates, which ensures the required quality of the hardened layer, based on the analysis of the SSS in the deformation zone and residual stresses in the hardened parts. Method Applied. Using 3D design software (Solid work 2019) and computational modeling (Ansys workbench 19.2), a model of the process of hardening a cylindrical part with flat tools was built to calculate and evaluate the stress-strain state of the blank in the deformation zone and residual stresses in finished parts. Result. Based on the analysis of the results of finite element modeling, a rational value of the angle of the wedge section of flat plates was established equal to 45°. With this angle value, the maximum temporary stress during hardening reaches a value less than the tensile strength of the material, which ensures hardening without the occurrence of cracks on the surface of the blank, as well as a uniform distribution of residual stresses on the surface. Practical Relevance. The proposed research results are of great practical importance for improving the quality of hardened parts. The established rational value of the wedge section angle of flat plates (45°) allows minimizing the risk of damage and residual deformations of cylindrical parts during their hardening. This helps improve the performance characteristics of non-rigid parts, ensuring their increased durability and reliability during operation.
Keywords
strengthening, surface layer, wedge plates, rectangular plates, stress-strain state, yield strength, depth of plastic deformation
For citation
Zaides S.A., Bui M.D. Selection and Justification of the Angle Value of the Wedge Section of Flat Plates Under Surface Plastic Deformation. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Noso-va [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 3, pp. 87-96. https://doi.org/10.18503/1995-2732-2025-23-3-87-96
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