RESEARCH OF INFLUENCE EQUAL CHANNEL ANGULAR PRESSING COMBINED WITH A HEAT TREATMENT ON THE MICROSTRUCTURE OF THE STEEL 45

1 LEZHNEV Sergey
Co-authors:
2 NAIZABEKOV Abdrakhman 3 KNAPINSKI Marcin 4 KURAPOV Georgiy 4 VOLOKITINA Irina
Institutions:
1 Karaganda state industrial university, Temirtau, Kazakhstan, sergey_legnev@mail.ru
2 Rudny industrial institute, Rudny, Kazakhstan, naizabekov57@mail.ru
3 Czestochowa University of Technology, Czestochowa, Poland, EU
4 Kazakh National Technical University of K.I. Satpayev, Almaty, Kazakhstan, irinka.VAV@mail.ru
Conference:
24th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, June 3rd - 5th 2015
Proceedings:
Proceedings 24th International Conference on Metallurgy and Materials
Pages:
294-300
ISBN:
978-80-87294-58-1
ISSN:
2694-9296
Published:
12th January 2015
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
42 views / 9 downloads
Abstract

The effect of preliminary heat treatment and equal channel angular pressing in step die on the microstructure and properties of steel grade 45 are analyzed. There is revealed that the grain size after equal channel angular pressing depends little on the preliminary heat treatment, however, annealing reduces the hardness of steel, which helps to reduce the effort of pressing on the first passes. Ultra-fine grained structure in steel of grade 45 is retained at heating up to 400 °C, and only at heating up to 500 °C, the recrystallized grains appear, substantially free of dislocations, with balanced triple grain junctions.

Keywords: equal channel angular pressing, heat treatment, microstructure, steel grade 45.

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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