| TITLE |
| INVESTIGATION OF THE INFLUENCE OF THE INITIAL MICROSTRUCTURE UNDER DIFFERENT REGIMES OF HEAT TREATMENT ON THE MECHANICAL PROPERTIES OF 42CrM4 STEEL |
|
| AUTHOR(S) |
| V. Todorov |
|
| ABSTRACT |
| In this article, the impact of heat treatments - normalization and a combination of normalization, quenching and high-temperature tempering - on the microstructure and mechanical properties of 42CrMo4 steel specimens is investigated. Three groups of samples were studied: 1) asreceived; 2) after normalization at temperature of 860 with holding time of 20 minutes and cooling in air; 3) after normalization (860/20 minutes), quenching at 850 in oil and then tempered at 590, followed of cooling in air. The phase and microstructural analysis revealed the presence of retained austenite in the samples subjected to normalization. The resulting microstructure is ferrite-sorbite, containing about 10% retained austenite. The mechanical properties for the three investigated groups of samples showed the highest values for tensile strength (Rm=1147 MPa) and hardness (324 HBW) after normalization, and the highest elongation (12.9%) was obtained with the combination of normalization, quenching and high temperature tempering. |
|
| DOI |
| doi.org/10.62853/PHAV2471 |
|
| PAGES |
| 49-53 |
|
| DOWNLOAD |
| INVESTIGATION OF THE INFLUENCE OF THE INITIAL MICROSTRUCTURE UNDER DIFFERENT REGIMES OF HEAT TREATMENT ON THE MECHANICAL PROPERTIES OF 42CrM4 STEEL |
|
| How to cite this article: |
| V. Todorov. Investigation of the influence of the initial microstructure under different regimes of heat treatment on the mechanical properties of 42CrMo4 steel. Journal of Technical university of Gabrovo. 68 (2024) 49-53. |
|
