20.500.12556/DiRROS-20314 Effect of Ti and S content on the properties and machinability of low-carbon ferritic–pearlitic steel This research was focused on the effect of Ti and S content on the formation of non-metallic inclusions and their influence on the mechanical properties and machinability of low-carbon ferritic– pearlitic steels. An analysis and classification of the non-metallic inclusions were carried out. The tensile strength and impact toughness were determined from samples taken in the rolling direction. Machinability investigations were carried out on a CNC turning machine and by analyzing the surface roughness. TiO-TiN inclusions are present in steels with an increased Ti content. In these steels, the hardness, tensile strength, and cutting forces increase with a higher proportion of Ti. In the second group of steels with increased contents of S, Al, and Ca, MnS and CaO-Al2O3-MnS non-metallic inclusions are formed. As the S content increases, the tensile strength and cutting forces decrease, while the impact toughness increases. In steels with added Ti, the This research was focused on the effect of Ti and S content on the formation of non-metallic inclusions and their influence on the mechanical properties and machinability of low-carbon ferritic– pearlitic steels. An analysis and classification of the non-metallic inclusions were carried out. The tensile strength and impact toughness were determined from samples taken in the rolling direction. Machinability investigations were carried out on a CNC turning machine and by analyzing the surface roughness. TiO-TiN inclusions are present in steels with an increased Ti content. In these steels, the hardness, tensile strength, and cutting forces increase with a higher proportion of Ti. In the second group of steels with increased contents of S, Al, and Ca, MnS and CaO-Al2O3-MnS non-metallic inclusions are formed. As the S content increases, the tensile strength and cutting forces decrease, while the impact toughness increases. In steels with added Ti, the machining is more difficult, but a finer surface is achieved after turning, while a higher S content results in an increased fraction of softer sulfide inclusions, which reduce the cutting forces but also result in a reduced surface quality. turning, while a higher S content results in an increased fraction of softer sulfide inclusions, which reduce the cutting forces but also result in a reduced surface quality. non-metallic inclusions mechanical properties machinability surface roughness true false true MDPI Švica Angleški jezik Ni določen © 2024 by the authors Neznano 2024-09-03 12:46:07 2024-09-03 12:46:07 2024-09-05 12:56:11 0000-00-00 00:00:00 2024 0 0 Nasl. z nasl. zaslona; Opis vira z dne 3. 9. 2024; Št. članka: 977; str. 1-16 iss. 9 Vol. 14 2024 0000-00-00 Zaloznikova Objavljeno apc 0000-00-00 0000-00-00 2024-08-28 620.1 2075-4701 10.3390/met14090977 206205699 RAZ_Arh_Bostjan_2024.pdf RAZ_Arh_Bostjan_2024.pdf 1 01C4871825692633D7B1051AD1C1CC77 a03b3f00c3f42361f433e8ace3c223a551db8676a6eab7898eacadd707057f93 3d21c06d-69d4-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28506 https://www.mdpi.com/2075-4701/14/9/977 1 f779afb4-69d0-11ef-b487-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=28503 Inštitut za kovinske materiale in tehnologije 0 0 0