Influence of tempering modes on fine structure parameters, stress and hardness of 25Cr2Mo1V steel

• Main Authors: Bobyr S.V., Levchenko G.V., Borysenko A. Yu., Kutseva Nataliya O.
• Format: Article
• Language: English
• Published: National Academy of Sciences of Ukraine. Physico- Technological Institute of Metals and Alloys 2019-09-01
• Series: Металознавство та обробка металів
• Subjects: steel; fine structure; crystal lattice parameter; hardness; stress; release.
• Online Access: https://momjournal.com.ua/sites/default/files/2_9.pdf

The results of studies on the effect of tempering regimes on the parameters of fine structure, stress and hardness of 25Cr2Mo1V steel are presented. It is shown that the secondary hardness of steel 25Cr2Mo1V, tempered at a temperature of 550 °C, maximum after 5 hours release and is due to the smallest block size of the crystal lattice. It is established that in the initial stages of decay of the supersaturated solid α-solution of hardened 25X2M1F steel at 550 °C, the crystal lattice parameters increase. During the next tempering time, the bonding of the crystal lattices of these phases is broken, due to the separation of the carbide particles from the α-phase and the parameter and the crystal lattice of the α-phase decreases.