Specifics of structural iron structure formation at the controlled rolling and thermal aftertreatment
Abstract: The structure and properties of plate rolled high-strength structural steel of different composition were studied after the controlled rolling. There is shown that a decrease of temperature of the deformation completion leads to an increase of strength properties, an increase of the structure streaking degree being observed thereat. There is described a mechanism of the structure streaking formation at a low-temperature controlled rolling. It is shown that the reason of the structure streaking is “treatment liquation” — a specific chemical inhomogeneity formed in the process of rolling at the temperatures lower then the temperature recrystallized threshold. It has been found out that a dark streak pattern in steels after the controlled rolling can remain at further production modes. There has been studied the process of austenitizing steel with a ferrite-pearlitic streaking. It was determined that in heating up to 900°С austenite still has “treatment liquation” preserved which becomes apparent in the form of streaks of a higher etching, these streaks being located at the place of the previous perlitic streaks.
Keywords: high-strength structural steels, reliability, controlled rolling structure formation, dark streak pattern, homogeneity, mechanical properties, thermal treatment, austenitizing.
Pages: 113-121.
For citation: Gorbatenko, V. P.; Lukin, A. V. Specifics of structural iron structure formation at the controlled rolling and thermal aftertreatment. – Text : electronic. – In: Metal Constructions. – 2010. – Vol. 16, N 2. – Р. 113-121. – URL: https://donnasa.ru/publish_house/journals/mk/2010-2/04_gorbatenko_lukin.pdf (date of access: 24.11.2024). – ISSN 1993-3517.
Vol. 16, N 2 (2010)
Journal: Metal Constructions
Publish house: Donbas National Academy of Civil Engineering and Architecture
Journal: Metal Constructions
Publish house: Donbas National Academy of Civil Engineering and Architecture