STRUCTURE AND MECHANICAL PROPERTIES OF ROLLED BARS FROM STEEL 42CRMO4

1 Kuc Dariusz
Co-authors:
1 Bednarczyk Iwona 2 Krawczyk Aleksandra 2 Paterek Włodzimierz 2 Zygmunt Karolina 3 Woźniak Dariusz 1 Hadasik Eugeniusz
Institutions:
1 Silesian University of Technology, Faculty of Materials Engineering and Metallurgy 40-019 Katowice, Poland, dariusz.kuc@polsl.pl
2 Huta Bankowa, ul. Jana III Sobieskiego 24, 41-300 Dąbrowa Górnicza, Poland
3 Institute of Iron Industry, ul. Miarki 12-14, 44-100 Gliwice, Poland
Conference:
28th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 22nd - 24th 2019
Proceedings:
Proceedings 28th International Conference on Metallurgy and Materials
Pages:
391-396
ISBN:
978-80-87294-92-5
ISSN:
2694-9296
Published:
4th November 2019
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
32 views / 18 downloads
Abstract

The paper presents the results of evaluation of the macro and microstructure as well as mechanical properties of rolled bars made from steel 42CrMo4 from continuously cast stock. The macrostructure was examined using Baumann's method and deep etching. Based on the examination of the macro and microstructure, it was shown that discontinuities and internal defects may occur during initial plastic processing of ingots by rolling. For high degree processing, a fine-grained structure is obtained, while for large bar diameters and low degree processing, there may be variations in the grain size in the cross-section. Mechanical properties determined from the static tensile test, impact test and hardness measurements indicate a greater influence of the sampling site than of the degree of plastic processing, which may results from both the quality of ingots and the rolling conditions.

Keywords: structural steels, rolling of long products, plastic working
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