View in EDS

Influence of forging process parameters on the structure and properties of diffusion-alloyed powder steel SP50N4D2M produced by PJSC Severstal.

Saved in:
Bibliographic Details
Title: Influence of forging process parameters on the structure and properties of diffusion-alloyed powder steel SP50N4D2M produced by PJSC Severstal.
Authors: Egorov, M. S.1 (AUTHOR) aquavdonsk@mail.ru, Egorova, R. V.1 (AUTHOR) regorova@donstu.ru, Gantimurov, K. V.1 (AUTHOR) gantimkir@ya.ru, Zhevolukov, V. E.1 (AUTHOR), Egorov, A. M.1 (AUTHOR)
Source: Metallurgist. Dec2025, Vol. 69 Issue 8, p1246-1254. 9p.
Subjects: Microstructure, Forging (Manufacturing process), Metalwork, Mechanical behavior of materials, Deformations (Mechanics), Strength of materials, Metal powders
Abstract: This study examines the effect of open-die forging parameters on the microstructure and mechanical properties of SP50N4D2M diffusion-alloyed powder steel produced by PJSC Severstal. The hot forging process of cylindrical billets, as well as key factors including the height-to-diameter ratio (h0/d0), initial porosity, and heating temperature were examined. The experimental procedure involved preparing a charge by adding ultra-dispersed nickel oxide (NiO) and graphite. This was followed by cold pressing, sintering in a protective atmosphere, and hot upset forging on a stamping press. The results demonstrate that deformation occurs non-uniformly, with the formation of three distinct zones: a minor deformation zone, a major deformation zone, and a zone under tensile stress. This non-uniformity leads to barreling and potential surface cracking of the specimens. Decreasing the h0/d0 ratio was found to reduce plastic deformation due to increased contact friction and constrained deformation zones. Reducing initial porosity from 30% to 10% enhances material strength, yet the risk of microcrack formation due to non-uniform densification remains. To improve the quality of the deformed billets, the study recommends accounting for additional tensile stresses and optimizing the upset forging parameters. [ABSTRACT FROM AUTHOR]
Copyright of Metallurgist is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:This study examines the effect of open-die forging parameters on the microstructure and mechanical properties of SP50N4D2M diffusion-alloyed powder steel produced by PJSC Severstal. The hot forging process of cylindrical billets, as well as key factors including the height-to-diameter ratio (h0/d0), initial porosity, and heating temperature were examined. The experimental procedure involved preparing a charge by adding ultra-dispersed nickel oxide (NiO) and graphite. This was followed by cold pressing, sintering in a protective atmosphere, and hot upset forging on a stamping press. The results demonstrate that deformation occurs non-uniformly, with the formation of three distinct zones: a minor deformation zone, a major deformation zone, and a zone under tensile stress. This non-uniformity leads to barreling and potential surface cracking of the specimens. Decreasing the h0/d0 ratio was found to reduce plastic deformation due to increased contact friction and constrained deformation zones. Reducing initial porosity from 30% to 10% enhances material strength, yet the risk of microcrack formation due to non-uniform densification remains. To improve the quality of the deformed billets, the study recommends accounting for additional tensile stresses and optimizing the upset forging parameters. [ABSTRACT FROM AUTHOR]
ISSN:00260894
DOI:10.1007/s11015-025-02044-w