2023

Stamenković, Uroš 
Marković, Ivana 
Mladenović, Srba 
Manasijević, Dragan 
Balanović, Ljubiša 
Kovačević, Avram 
Nedeljković, Milan 
Božinović, Jovana

University of Zenica, Faculty of Metallurgy and Technology

Proceedings - 14th Scientific-Research Symposium with International Participation - Metallic and nonmetallic materials : production - properties - application, Zenica, Bosnia and Herzegovina, 27th-28th April 2023, 2023, 125-132

14

125

132

English

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

In this paper, C435 medium carbon tool steel was investigated after various heat treatments. The thermal properties, specifically thermal diffusivity and thermal conductivity, were measured and also the microstructure analysis was done on a light microscope. Heat treatment of the samples included: 1) the normalization heat treatment at 900°C for one hour and cooling in the air; 2) quenching the samples in water and in oil separately afier reheating them at 880°C for one hour and; 3) tempering the quenched samples at 200°C-350°C for 2 hours. The results show the highest values of thermal properties for the normalized sample. Also, the lowest values were recorded for the quenched samples, and the values of thermal properties for the tempered samples are between the values of the quenched and normalized samples. Microstructure analysis shows a typical ferrite-pearlite structure after normalization. Martensite appeared in the water-quenched sample. However, the microstructure of the oil-hardened sample predominately consists of ferrite and pearlite because the critical cooling rate was not reached. Tempered samples quenched in the water had the microstructure of tempered martensite.

C45 steel, Microstructure, Martensite, Thermal properties, Tempering

ISSN

2566-4344

URI

https://www.fipn.unze.ba/images/Dokumenti/MN...
https://repozitorijum.tfbor.bg.ac.rs/handle/...