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A Characterization of the Impact Toughness of Hot-rolled HSLA Steel

Hamryszczak Tomasz, Śleboda Tomasz, Lypchanskyi Oleksandr, Pańcikiewicz Krzysztof

Journal of Casting & Materials Engineering

2024

Vol. 8, no. 4

54--58

Due to the wide use of HSLA steels in difficult conditions, e.g. at low temperatures, it is extremely important to test the impact strength of these steels. This is equally important because most of those structures are made by welding these steels, and the welding process itself has a significant impact on the properties of joints and welding zones. In this work, the authors analyzed two selected representative HSLA steels rolled in the Krakow branch of ArcelorMittal Poland S.A. – the only place in Poland where HSLA steels in the form of hot-rolled strips can be produced on an industrial scale. Impact tests were performed in accordance with technical acceptance standards, and then the fracture surfaces after impact tests were characterized using light and scanning microscopy. In the next part of the work, a set of previously gathered data were analyzed to determine the influence of thermomechanical rolling process parameters on the level of impact strength and the influence of chemical composition on it.

Hot Rolling of HSLA Steels - a Review of Recent Studies

Hamryszczak Tomasz

Archives of Metallurgy and Materials

2024

Vol. 69, iss. 3

1151--1157

Although known for many years, HSLA steels are still of considerable interest to researchers. The unique properties offered by the presence of micro-additives Nb, V, Ti in these steels are widely used in a variety of constructions - from the automotive industry, through the transport of media such as oil or gas, to large structures. Unfortunately, much of the research only concerns the theoretical sphere or does not go beyond the area of semi-industrial research. Research on an industrial scale, supported by industrial trials, is relatively scarce. This is certainly due to the very high costs of such research, but also to the rather limited number of places where HSLA steels are mass produced. This paper presents and systematizes research from the last three years into the thermo-mechanical rolling of HSLA steels. The review is divided according to the successive stages of the production process. The work forms the author’s basis for further research in this area.