2023

Stamenković, Uroš 
Marković, Ivana 
Mladenović, Srba 
Marjanović, Saša 
Kovačević, Avram 
Mitrović, Milijana 
Basarabić, Filip

University of Belgrade, Technical Faculty in Bor

Proceedings - 54th International October Conference on Mining and Metallurgy - IOC 2023, 18-21 October 2023, Bor Lake, Serbia

407

413

English

M33 - Conference paper at an international conference, printed in full

The subject of this paper was the investigation of the influence of different quenching media on the mechanical, thermal, and structural properties of C45 medium carbon steel. After normalization heat treatment, steel samples were austenitized at 880°C for 50 minutes. Austenitization was followed by quenching in different quenching media: pure water and different aqueous solutions (2–8%) of NaOH. After each heat treatment, hardness and thermal properties were determined, along with structural investigations using the optical microscope. After normalization, samples had the lowest hardness values, while thermal conductivity was the highest compared to the other tested samples. Metallographic analysis showed that the structure consists of fine-grained ferrite and perlite. Quenching in water and aqueous solutions, the values of hardness increased significantly, while the values of thermal properties decreased. Samples quenched in aqueous solutions exhibit extreme hardness. Metallographic analysis of the samples after quenching revealed fine needles of martensite.

quenching, aqueous salt solutions, hardness, thermal conductivity

ISBN

978-86-6305-140-9

URI

https://ioc.tfbor.bg.ac.rs/public/2023/Proce...
https://repozitorijum.tfbor.bg.ac.rs/handle/...