Analysing strength, hardness and grain-structure of 0.2%-C steel specimens processed through an identical heating period with different continuous transformation rates
[ 1 ] Instytut Technologii Mechanicznej, Wydział Inżynierii Mechanicznej, Politechnika Poznańska | [ P ] employee
2022
scientific article
english
- 0.2%-C steel
- heat treatment
- continuous cooling
- strength
- hardness
- microstructure
EN The present work dealswith improvement of mechanical properties and refining themicrostructure of low carbon steel (0.2%-C) after applying heat treatment techniques. For the purpose, five different sampleswere taken under study. First sample was kept in ‘as received’ condition and other four sampleswere undergone into heating process in an Induction furnace. The holding temperature of all the four samples were kept common i.e., 850 °C for a fixed period of 2.5 h.Then, these four samples were cooled into four different coolingmedia i.e., Air,Water,Oil, and Furnace. All the samples were in the form of rods with 195mmlength and 32mmdiameter. The universal testingmachine was used to determine the tensile strength of all the samples. Rockwell hardness tester was used to find the hardness of samples. The microstructural variation was analysed through an opticalmicroscope. All the results were analysedandcomparedwith‘as received’ sample. The Oil cooled sample showed the highest tensile strength of 585 MPa. Themicrostructural orientation of oil cooled sample i.e., bainite+fine lamella of ferrite and cementite, provides a good hardness, strength, and toughness to the steel. In addition, XRDand fractography analysis of the samples were also carried out.
09.12.2022
126505-1 - 126505-14
Article Number: 126505
CC BY (attribution alone)
open journal
final published version
at the time of publication
70
2,3