Effect of The Processes of Self-Tempering and Tempering on The Mechanical Characteristics and the Character of Fracture of Low-Carbon Martenstic Steel Quenched in Air
- Authors: Vorobev R.A.1, Dubinskii V.N.1, Evstifeeva V.V.2
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Affiliations:
- Alekseev NGTU
- SC CRI Burevestnik
- Issue: Vol 120, No 10 (2019)
- Pages: 989-994
- Section: Strength and Plasticity
- URL: https://journals.rcsi.science/0031-918X/article/view/168762
- DOI: https://doi.org/10.1134/S0031918X19100132
- ID: 168762
Cite item
Abstract
Abstract—The influence of the processes of self-tempering and tempering on the mechanical characteristics and structure of low-carbon martensitic steel after air-quenching has been considered in this work. The processes of martensite decomposition (self-tempering) that started upon cooling continue in the steel in the course of subsequent tempering at 200, 300, 400, and 500°C with the formation of a ferrite–carbide mixture of different degrees of dispersion. Upon tempering at temperatures of 200–400°C, a monotonic increase is noted in the yield stress by 11%; the tempering at 500°C leads to a 3% reduction in the yield stress. The character of the fracture of the samples was studied using scanning electron microscopy; this study has confirmed the phenomenon of temper brittleness in the steel at temperatures of 300 and 500°C, which is in good agreement with the results of mechanical tests.
About the authors
R. A. Vorobev
Alekseev NGTU
Author for correspondence.
Email: linuxjuicy@gmail.com
Russian Federation, Nizhny Novgorod, 603950
V. N. Dubinskii
Alekseev NGTU
Email: linuxjuicy@gmail.com
Russian Federation, Nizhny Novgorod, 603950
V. V. Evstifeeva
SC CRI Burevestnik
Email: linuxjuicy@gmail.com
Russian Federation, Nizhny Novgorod, 603950