The modifier effect on the structure and properties of 40CrNi3MoV steel

10 июн 2025

Received: 16.04.2025
Accepted: 27.04.2025
Saniya Kaskataevna Arinova, Dastan Rakhmetollaevich Aubakirov, Marat Mantenovich Dospayev, Assem Adilkhanovna Tuganbayeva

This study presents the results of an investigation into the effects of a multifunctional modifier on the properties of 40CrNi3MoV structural steel. The modifier employed belongs to the INSTEEL class and comprises a complex combination of Ca, Ba, Ti, Nb and rare earth metals (REMs). The ingot modifier was pre-crushed to a 30-100 μm powder state. The synthesized modifier was encapsulated in aluminum foil and introduced into the furnace with the charge materials. Mechanical testing of the resulting steel samples included evaluation of tensile strength, hardness, elongation at fracture, impact toughness and wear resistance. The experimental results demonstrated that the applied modification did not lead to significant alterations in the steel’s elemental composition, which remained within the standard specification limits. Modification resulted in a marked enhancement of the steel’s hardness, strength and wear resistance. The ease of introducing the modifier into the melt, along with its minimal required dosage, makes the proposed method highly practical. These factors, combined with the observed strengthening effects, support its consideration as a broadly applicable approach for enhancing the mechanical properties of heat-treatable steels.

Full arcticle: The modifier effect on the structure and properties of 40CrNi3MoV steel