Study of Carbide Dissolution and Austenite Formation during Ultra-Fast Heating in Medium Carbon Chromium Molybdenum Steel
Abstract
:1. Introduction
2. Experimental
2.1. Materials and Experiments
2.2. Material Characterization
2.3. Material Modelling
3. Results
3.1. Microstructure after Ultra–Fast Heat Treatment
- K–S relationship exists between parent austenite and martensite.
- The misorientation associated with martensite boundaries varies from around 10° to 20°, 47–57° in case of packets and 50°–60° in case of blocks.
- Hence, it can be presumed that misorientations of 20°–47° are due to boundaries corresponding to former austenite grains [28].
3.2. Modelling results
4. Discussion
4.1. Carbide Dissolution
4.2. Austenite Formation
4.3. Phase Transformations during Quenching
5. Conclusion
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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C | Mn | Si | P | S | Cr | Mo |
---|---|---|---|---|---|---|
0.43 | 1.0 | 0.35 | 0.035 | 0.04 | 1.10 | 0.25 |
Elements | Spectrum 12 | Spectrum 13 | Spectrum 14 | Spectrum 15 |
---|---|---|---|---|
C | 0.38 | 1.27 | - | - |
Si | 0.13 | 0.10 | 0.29 | 0.38 |
Cr | 10.79 | 14.18 | 3.29 | 0.80 |
Mn | 5.85 | 7.66 | 3.06 | 1.15 |
Mo | - | 0.38 | - | - |
Fe | rest | rest | rest | rest |
Carbide Size | Vθ/γ (m/s) | |
---|---|---|
5 nm | 2.61 × 10‒6 | 3 × 10‒6 |
200 nm | 2.5 × 10‒6 | 1.64 × 10‒9 |
Carbide Size | θ/γ | M7C3/γ |
---|---|---|
5 nm | 13.7 nm | 0.22 μm |
200 nm | 1.41 μm | 1.63 μm |
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Papaefthymiou, S.; Bouzouni, M.; Petrov, R.H. Study of Carbide Dissolution and Austenite Formation during Ultra-Fast Heating in Medium Carbon Chromium Molybdenum Steel. Metals 2018, 8, 646. https://doi.org/10.3390/met8080646
Papaefthymiou S, Bouzouni M, Petrov RH. Study of Carbide Dissolution and Austenite Formation during Ultra-Fast Heating in Medium Carbon Chromium Molybdenum Steel. Metals. 2018; 8(8):646. https://doi.org/10.3390/met8080646
Chicago/Turabian StylePapaefthymiou, Spyros, Marianthi Bouzouni, and Roumen H. Petrov. 2018. "Study of Carbide Dissolution and Austenite Formation during Ultra-Fast Heating in Medium Carbon Chromium Molybdenum Steel" Metals 8, no. 8: 646. https://doi.org/10.3390/met8080646