Glinskikh P.I., Zamaraeva Yu.V., Yakovlev S.I., Zavaliy E.A. Determination of the Optimal Modes for Hot Rolling of AK4-1Ch Aluminum Alloy Plates

DOI: 10.18503/1995-2732-2025-23-4-61-70

Abstract

Rolled high-strength plates made from AK4-1ch alloy are a common semi-finished product for aviation purposes. However, one of the challenges of their production is the low relative elongation level and structural heterogeneity in the height direction of the plates. The aim of this study is to achieve a stable level of mechanical properties while increasing the relative elongation and reducing structural heterogeneity in plates with a thickness between 40 and 80 millimeters made from the AK4-1ch alloy, by adjusting the hot rolling conditions at JSC Kamensk-Uralsky Metallurgical Works. After examining the mechanical properties of plates with a thickness between 40 and 80 millimeters produced using traditional methods, it was found that the average strength values, regardless of sampling direction, significantly exceed the standard requirements. The average values of transverse and longitudinal elongation for these plates also show a significant margin. In terms of height, the average elongation value is only 20% above the standard requirement. By examining the macrostructure of a sample with reduced elongation, a light area was found in the center of its cross-section. Examining the microstructure, it was determined that the light area had a larger grain size compared to the periphery, with a difference of 20%. Optimization of hot rolling process, such as adjusting the compression scheme and relative compression in each pass, has led to an improvement in mechanical properties, including relative elongation in height, as well as a reduction in structural heterogeneity.

Keywords

AK4-1ch alloy, plate rolling, mechanical properties, relative elongation, structure

For citation

Glinskikh P.I., Zamaraeva Yu.V., Yakovlev S.I., Zavaliy E.A. Determination of the Optimal Modes for Hot Rolling of AK4-1CH Aluminum Alloy Plates. Vestnik Magnitogorskogo Gosudarstvennogo Tekhnicheskogo Universiteta im. G.I. Nosova [Vestnik of Nosov Magnitogorsk State Technical University]. 2025, vol. 23, no. 4, pp. 61-70. https://doi.org/10.18503/1995-2732-2025-23-4-61-70

Pavel I. Glinskikh – Process Engineer, JSC Kamensk-Uralsky Metallurgical Works, Kamensk-Uralsky, Russia; Master’s Student, Ural Federal University named after the First President of Russia B.N. Yeltsin, Yekaterinburg, Russia. Еmail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Yuliya V. Zamaraeva – PhD (Eng.), Head of Department, JSC Kamensk-Uralsky Metallurgical Works, Kamensk-Uralsky, Russia; Researcher, M.N. Mikheev Institute of Metal Physics of the Ural Branch of the Russian Academy of Sciences, Yekaterinburg, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.. ORCID 0000-0002-2620-7064

Sergey I. Yakovlev – Chief Engineer of the Rolled Products, JSC Kamensk-Uralsky Metallurgical Works, Kamensk-Uralsky, Russia. Еmail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Evgeniy А. Zavaliy – Deputy Head of the Thermomechanical Treatment of Sheets and Plates Shop, JSC Kamensk-Uralsky Metallurgical Works, Kamensk-Uralsky, Russia; Master’s Student, Ural Federal University named after the First President of Russia B.N. Yeltsin, Yekaterinburg, Russia. Email: This email address is being protected from spambots. You need JavaScript enabled to view it.

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Details: Published: 23 December 2025; Last Updated: 25 December 2025; Hits: 45