INFLUENCE OF THE FORMING METHOD/SURFACE STATE OF TEST PIECES ON THE MEASURED MECHANICAL PROPERTIES OF STEEL FOR COLD PROCESSING

1 JEDRZEJCZYK Dariusz
Co-authors:
2 SZŁAPA Ilona 1 SKOTNICKI Wojciech
Institutions:
1 University of Bielsko-Biala, Bielsko-Biała, Poland, EU, djedrzejczyk@ath.bielsko.pl, wskotnicki@ath.bielsko.pl
2 BISPOL SA, Bielsko-Biała, Poland, EU, iszlapa@bispol.com.pl
Conference:
25th Anniversary International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 25th - 27th 2016
Proceedings:
Proceedings 25th Anniversary International Conference on Metallurgy and Materials
Pages:
951-956
ISBN:
978-80-87294-67-3
ISSN:
2694-9296
Published:
14th December 2016
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
69 views / 19 downloads
Abstract

The paper presents the influence of the forming way of test pieces on measured values of the mechanical properties of steel for plastic cold processing. During research the two-dimensional samples were analysed after forming by die shearing, milling and electrical discharging, at an angle: 0, 45 and 90 o with reference to the rolling direction. Examinations concerned analysis of changes of surface microstructure, degree of grains deformation, evaluation of the surface state – roughness, surface development factor. The side sample surface was checked from the viewpoint of macrostructure and topography changes determined by PhaseView optical assembly for 3D surface scanning. In the elaboration the basic mechanical properties were compared, i.e. tensile strength, yield point, elongation. It was stated that the cutting method as well as the orientation of the test sample axis in relation to steel sheet rolling direction (despite annealing) influence measured steel mechanical properties.

Keywords: Steel forming, discrepancy of steel properties, correlation: forming method - steel properties

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