We present the chemical compositions of copper strips produced at the Kirov Nonferrous Metals Processing Plant and corresponding to the M0 grade according to the requirements of GOST 859-2014 international and Russian standard and study the effect of pilot cold rolling on the mechanical properties of these copper strips. The chemical composition of the studied strips was determined by the method of optical emission spectrometry. The procedure of experimental cold rolling was carried out on a laboratory double-roll mill (with a roll diameter of 150 mm and a barrel width of 235 mm) equipped with a microcontroller system for monitoring the rolling force. The degrees of relative reduction varied from 10 to 58%. To analyze the variations of the mechanical properties, the samples were subjected to tensile testing after rolling with variable degrees of relative reduction (of up to 60%). On the basis of the accumulated data, we plotted the curves of changes in the yield strength (σs), tensile strength (σu), relative elongation (δ), and Vickers hardness (HV) depending on the degree of deformation. It was discovered that the yield strength (σs) exhibits a parabolic dependence on the degree of relative reduction and increases from 45 to 380 MPa, whereas the tensile strength (σu) slowly and monotonically increases according to an almost linear dependence from 223 to 392 MPa as the degree of reduction increases from 0 to 60%. At the same time, the relative elongation (δ) decreases from 62% to 6%. Based on experimental data, we obtain the regression equations used to describe the relationship between the mechanical properties of the M0 copper alloy and the degree of its deformation. The relationship between the Vickers hardness (HV) and basic mechanical characteristics of the metal, such as its yield strength, tensile strength, and relative elongation are established. The adequacy of the obtained equations confirmed by high correlation coefficients (R2 > 0.9) and the results of evaluation of rolling forces with an error of at most 7% allow us to recommend them for finding the strength characteristics of rolling and designing rational modes of deformation of the M0 copper strips on automated design systems (CAD). The results of our investigations can be used in the rolling production to determine the basic mechanical properties of rolled strips and tapes made of M0 copper based on the measured levels of hardness without expensive tensile tests.

Determination and analysis of hardening curves and the mechanical properties of rolled thin strips from production party of copper

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发表日期：

2026年1月30日

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R. L. Shatalov,
Yuri Yu. Komarov

摘要

We present the chemical compositions of copper strips produced at the Kirov Nonferrous Metals Processing Plant and corresponding to the M0 grade according to the requirements of GOST 859-2014 international and Russian standard and study the effect of pilot cold rolling on the mechanical properties of these copper strips. The chemical composition of the studied strips was determined by the method of optical emission spectrometry. The procedure of experimental cold rolling was carried out on a laboratory double-roll mill (with a roll diameter of 150 mm and a barrel width of 235 mm) equipped with a microcontroller system for monitoring the rolling force. The degrees of relative reduction varied from 10 to 58%. To analyze the variations of the mechanical properties, the samples were subjected to tensile testing after rolling with variable degrees of relative reduction (of up to 60%). On the basis of the accumulated data, we plotted the curves of changes in the yield strength (σ_s), tensile strength (σ_u), relative elongation (δ), and Vickers hardness (HV) depending on the degree of deformation. It was discovered that the yield strength (σ_s) exhibits a parabolic dependence on the degree of relative reduction and increases from 45 to 380 MPa, whereas the tensile strength (σ_u) slowly and monotonically increases according to an almost linear dependence from 223 to 392 MPa as the degree of reduction increases from 0 to 60%. At the same time, the relative elongation (δ) decreases from 62% to 6%. Based on experimental data, we obtain the regression equations used to describe the relationship between the mechanical properties of the M0 copper alloy and the degree of its deformation. The relationship between the Vickers hardness (HV) and basic mechanical characteristics of the metal, such as its yield strength, tensile strength, and relative elongation are established. The adequacy of the obtained equations confirmed by high correlation coefficients (R² > 0.9) and the results of evaluation of rolling forces with an error of at most 7% allow us to recommend them for finding the strength characteristics of rolling and designing rational modes of deformation of the M0 copper strips on automated design systems (CAD). The results of our investigations can be used in the rolling production to determine the basic mechanical properties of rolled strips and tapes made of M0 copper based on the measured levels of hardness without expensive tensile tests.