期刊名称：Advances in Science and Technology Research Journal
印刷版ISSN：2080-4075
电子版ISSN：2299-8624
出版年度：2020
卷号：14
期号：2
页码：76-84
DOI：10.12913/22998624/118255
语种：English
出版社：Society of Polish Mechanical Engineers and Technicians
摘要：This paper presents the results of investigations into the effects of hot deformation parameters in compressionon the austenite grain size in the HSLA steel (0.16% C, 0.037% Nb, 0.004% Ti, 0.0098% N). The axisymmetriccompression investigations were performed on cylindrical investigation specimens of d = 1.2 using a Gleeble 3800simulator. The strain rate ranged of 1.0–15.9 s-1 and strain degree ε = 1.2. Before deformation, the research specimens were austenitized at temperature 1100–1250 °C. The metallographic observations of the primary austenitegrains were conducted with an optical microscope, while the structure of dynamically recrystallized austenite,inherited by martensite, was examined with the EBSD technique using a scanning electron microscope. On thebasis of the analysis of the investigation results, it was found that the size of dynamically recrystallized austenitegrains in HSLA steel were clearly affected by the hot compression parameters. In contrast, no signifcant impact ofthe austenitizing temperature on their size was found.
