Impact of Thermophysical Properties of High-Alloy Tool Steels on Their Performance in Re-Purposing Applications
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials and Metallography
2.2. Thermophysical Properties
2.2.1. Thermal Conductivity
2.2.2. Electrical Resistivity
3. Results and Discussion
3.1. Microstructure of the Investigated Alloys
3.2. Thermophysical Properties as a Function of Temperature
3.2.1. Thermal Conductivity
3.2.2. Electrical Conductivity and Electronic Thermal Conductivity
4. Conclusions
- (i)
- Thermal conductivity depends on the microstructure of a material, which depends on the chemical composition and heat treatment.
- (ii)
- Due to the measurement temperature above the annealing temperature, the microstructure of an alloy changes, which is measurable in the thermophysical properties.
- (iii)
- The thermophysical properties are also dependent on the carbide morphology.
- (iv)
- Therefore, the removal of the repurposed chisel parallel to the rolling direction and, accordingly, also to the carbide orientation is to be preferred.
Author Contributions
Funding
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Alloy | C | Si | Mn | Cr | Mo | W | V | Fe |
---|---|---|---|---|---|---|---|---|
L2 | 0.78 | 0.23 | 0.58 | 0.29 | - | - | 0.12 | Bal. |
M2 | 0.79 | 0.33 | 0.34 | 3.84 | 4.66 | 6.28 | 1.82 | Bal. |
D2 | 1.52 | 0.35 | 0.43 | 11.44 | 0.68 | - | 0.73 | Bal. |
Material | L2 | D2 | M2 |
---|---|---|---|
Hardening | 850°/6 min/Oil | 1055 °C/30 min/Chill hardening to 70° | 1210 °C/15 min/Furnace cooling |
Tempering | 200 °C/70 min/Salt water | 3 × 530 °C/480 min/Furnace cooling | 3 × 530 °C/120 min/Furnace cooling |
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Berger, A.; Benito, S.; Kronenberg, P.; Weber, S. Impact of Thermophysical Properties of High-Alloy Tool Steels on Their Performance in Re-Purposing Applications. Materials 2022, 15, 8702. https://doi.org/10.3390/ma15238702
Berger A, Benito S, Kronenberg P, Weber S. Impact of Thermophysical Properties of High-Alloy Tool Steels on Their Performance in Re-Purposing Applications. Materials. 2022; 15(23):8702. https://doi.org/10.3390/ma15238702
Chicago/Turabian StyleBerger, Aaron, Santiago Benito, Philipp Kronenberg, and Sebastian Weber. 2022. "Impact of Thermophysical Properties of High-Alloy Tool Steels on Their Performance in Re-Purposing Applications" Materials 15, no. 23: 8702. https://doi.org/10.3390/ma15238702