AP19678974 «Development and research of combined radial shear broaching and drawing technology impact on the properties of carbon steel bars»

1) Volokitina Irina Evgenyevna – PhD, Professor of the Department of Metallurgy and Materials Science, project manager. 

Scopus ID: 55902810800  

ResearcherID: G-4526-2018  

https://orcid.org/0000-0002-2190-5672

2) Volokitin Andrey Valeryevich – PhD, Associate Professor of the Department of Metal Forming, senior researcher. 

Scopus ID: 56524247500  

ResearcherID: U-8580-2018

https://orcid.org/0000-0002-0886-3578

3) Panin Evgeny Alexandrovich – PhD, Professor of the Department “Metalworking by pressure”, senior researcher.

Scopus ID: 55903153300  

ResearcherID: B-7581-2015 

https://orcid.org/0000-0001-6830-0630

4) Fedorova Tatyana Dmitrievna – Master’s degree, researcher.

Scopus ID: 57222628232

5) Lavrinyuk Dmitry Nikolaevich – master of the thermal department of LPC-2 of Karmet JSC, junior researcher.

Scopus ID: 57223636463

6) Denisova Anastasia Igorevna is a doctoral student in the specialty “Nanotechnology and nanomaterials”, a junior researcher.

Scopus ID: 57430197600

Based on the results of scientific research, at least 4 (four) articles and (or) reviews will be published in peer-reviewed scientific journals indexed in Science Citation Index Expanded Web bases of Science and (or) having a CiteScore percentile in the Scopus database of at least 35 (thirty-five). In addition, 1 (one) article will be published in a peer-reviewed foreign or domestic publication recommended by the CQAEMERK (Committee for Quality Assurance in Education of the Ministry of education of the Republic of Kazakhstan). Research results will be presented at international European conferences in Bulgaria, Poland or other international conferences from far abroad, as well as at international conferences in Russia, Belarus and Kazakhstan. Based on the results obtained, an application will be submitted for obtaining a patent of the Republic of Kazakhstan for a utility model.

As a result of the project, recommendations will be developed for the implementation of a new combined deformation technology that combines technology of radial shear broaching and drawing to obtain bars with improved performance properties, and an implementation certificate will be obtained that will contain data on the expected socio-economic effect.

The results of project implementation will be new, scientifically substantiated knowledge about new developed innovative combined technology that combines technology of radial shear broaching and drawing, which will make it possible to obtain long billets with a gradient structure and increased level of mechanical and operational properties. Also, new scientific knowledge about carbon steel behavior under conditions of a complex stress-strain state and the influence of these factors on gradient microstructure and properties obtaining of material being processed, which is of significant interest for metal forming and materials science.

The use of combined technology will allow to achieve required mechanical properties of the product in a smaller number of processing cycles, which will reduce energy costs. Combination of radial shear deformation and drawing will allow to obtain rods with improved mechanical characteristics and operational properties, which will primarily lead to an increase in the maximum allowable loads in reinforced concrete structures, as well as while maintaining the required operating conditions for reinforced concrete structures, to reduce metal consumption of structures, through the use of reinforcing elements of smaller diameter while maintaining their mechanical characteristics.

In the case of further development and introduction into industry of the innovative combined technology developed within the framework of this project, it is possible to create innovative production and create new jobs. In addition, obtained research results will be used by Bachelors, Masters and PhD students in the educational process and in carrying out their scientific research in the direction of materials with unique or increased levels of physical and mechanical properties obtaining.

1) An analytical review of methods and processes allowing to obtain a gradient structure and increased strength properties in long-length workpieces has been carried out. The following methods for obtaining gradient structures were considered in the review: intensive plastic deformation of metals, the process of active bending of copper, the formation of a gradient structure in 50KHGFA steel and Fe-C-Mn-Cr-Ni-Mo steel using gaseous, liquid or powder precursors. In addition, the influence of grain size, texture, and growth gradients on deformation mechanisms and mechanical properties of gradient-nanostructured materials was studied. The combination of structural gradients and the manifestation of other effects during heat treatment may be of interest for controlling the local and operational properties of bars.

2) A new innovative deformation technology has been developed, combining the technology of radial shear broaching and drawing. Instead of the common radial shear rolling, in our case we carry out the rod broaching on a screw rolling mill. Since due to the stretching of the workpiece simultaneously through the crossing rolls and the fiber, tensile stresses arise, which lead to a decrease in the drawing force. Due to the tensile stresses along the workpiece, a more uniform formation of the profile of the stretched workpiece occurs. When stretching, the workpiece is deformed in cross-section by stretching it through conical rollers, which are located at an angle of 120 degrees to each other. The surface layers of the workpiece experience radial twisting, which, in combination with compression, gives a high degree of deformation, allowing for better surface treatment. And in combination with radial shear deformation, there is a greater crushing of the structure.

3) A three-dimensional model of the combined radial shear broaching technology with subsequent drawing in a 3D Compass for subsequent mathematical modeling is constructed.

4) Computer models of combined radial shear broaching technology with subsequent drawing are constructed and technological and geometric rational parameters are determined that ensure the best stress-strain state and energy-strength parameters of the process.

1. Волокитин А.В., Федорова Т.Д., Лавринюк Д.Н., Денисова А.И. Способы получения градиентной структуры в прутках. Перспективные материалы и технологии: материалы международного симпозиума, Минск, 2023, С. 336.

2. Volokitina I.E., Denissova A.I., Volokitin A.V., Panin E.A. Methods for Obtaining a Gradient Structure. Progress in Physics of Metals, 2024, 25, No. 1: 132-160, – https://doi.org/10.15407/ufm.25.01.132 (Scopus, 65th percentile, Q3)

3. Volokitina I., Volokitin A., Denissova A. Development of a new technology for carbon steel bars processing. International journal for science, technics and innovations for the industry. Machines. Technologies. Materials. 2024, 2, P. 70-72.