AP19676903 «Development of innovative twisting technology in an equal-channel step matrix with subsequent drawing»

1) 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

2) 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

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

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

As a result of the project, recommendations for the implementation of new combined technology of twisting in an equal-channel stepped matrix with subsequent drawing to produce a wire with improved performance properties will be developed, as well as an act of implementation, which will contain data on expected socio-economic effect.

The project results will be new, scientifically grounded knowledge about new developed innovative combined process of thermo-mechanical metastable austenitic stainless steels treatment, allowing to obtain long wire with ultrafine grain structure and increased level of mechanical and operational properties. As well as, new scientific knowledge about the behavior of materials under complex stress-strain conditions and the influence of these factors on gradient microstructure obtaining and machined materials properties, which are of significant interest for metal forming and materials science. In case of further development and industry implementation of the innovative combined technology developed within this project, it is possible to create innovative production without significant modernization of existing equipment line and new jobs. In addition, obtained data will be used in relevant direction and specialization Bachelors, Masters and PhD students training. Obtained research results will be used by Bachelors, Masters and PhD students in educational process and in their research towards obtaining materials with unique or increased level of physical-mechanical properties.

1) An analytical review of methods and processes that allow obtaining increased strength and performance properties in long-length workpieces has been carried out. As well as an analysis of the features of technological schemes of intensive plastic processing.

When drawing medium- and large-section wire, the use of large compressions and, consequently, a large number of deformation cycles is impractical, since the initial diameter of the wire is limited, and an increase in the number of passes leads to a decrease in the diameter of the wire. Therefore, in the last two decades, much attention has been paid by researchers to obtaining ultrafine-grained structures in metals and alloys by methods of intense (large) plastic deformations, due to the possibility of a sharp 2-5-fold increase in strength in them. At the moment, the technologies that most effectively grind the structure include methods that implement a simple shear scheme during multi-cycle processing. However, despite the large number of methods developed and studies conducted, all methods of intensive plastic deformation developed to date have many different shortcomings, the most important of which is the limitation of the workpiece in size. Therefore, the development and development of new processes for the production of high-strength materials with improved strength properties is an urgent and important issue for the development of production. In this regard, the use of an improved drawing method, combining torsion methods that implement a simple shear scheme and the classical drawing process through a die, allows you to expand the boundaries of the use of traditional structural materials.

2) A copper alloy with high thermal stability, strength, ductility, electrical conductivity and wear resistance has been selected and justified.

Recent advances in the electronics industry have attracted the attention of researchers to the development of copper-based alloys with high strength and good electrical conductivity. High strength and good electrical conductivity are two opposite conditions for copper alloys. The main amount of research is focused on the addition of alloying elements (e.g. Cr, Ag, Zr, Nb and Co) to pure copper. Alloying is a traditional hardening method that leads to the appearance of various types of defects in the copper matrix (for example, dislocations, point defects), which increase the scattering of conduction electrons and increase the electrical resistivity. Therefore, the HRSC alloy was chosen, which has high thermal and electrical conductivity, as well as excellent strength and manufacturability. It has good machinability during bending, pressing and drawing. And it also retains its original strength, despite heating at a temperature of 400 ℃.

3) A combined wire deformation technology has been developed. The essence of the technological process is the deformation of the wire in a rotating equal-channel step matrix and subsequent drawing. The matrix rotates around the axis of the wire and thereby creates tension due to equal-channel angular broaching and twisting in the matrix. The rotation of the die is carried out in a specially designed mechanism, which is installed in the line of the drawing mill equipment in a block with technological lubrication, which allows the supply of lubricant to the die and die in the drawing block.

4) Computer models of the combined technology of twisting in an equal-channel step matrix with subsequent drawing are constructed and 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. Методы получения ультрамелкозернистой структуры в проволоке. Перспективные материалы и технологии: материалы международного симпозиума, Минск, 2023, С. 337-339

2. Volokitina, I., Volokitin, A., Panin, E., Fedorova T., Lawrinuk D., Kolesnikov A., Yerzhanov A., Gelmanova, Z., Liseitsev, Y. Improvement of strength and per-formance properties of copper wire during severe plastic deformation and drawing process. Case Studies in Construction Materials, 2023, 19, – https://doi.org/10.1016/j.cscm.2023.e02609 (Scopus, 71th percentile, Q1)

3. Волокитин А.В., Волокитина И.Е., Федорова Т.Д., Латыпова М.А., Лавринюк Д.Н. Анализ влияния скручивания в равноканальной ступенчатой матрице и волочения на механические свойства медной проволоки. Металлург, 2024, №4. С. 30-34 (ВАК РФ)

4. Volokitina I., Volokitin A., Denissova A. Development of copper wire de-formation technology. International journal for science, tech-nics and innovations for the industry. Machines. Technologies. Materials. 2024, 1, P. 7-9.