The Influence of Cooling Rate between Ms and Mf on the Mechanical Properties of Low Alloy 42SiCr Steel Treated by the Q-P Process
Abstract
:1. Introduction
2. Experimental Procedure
2.1. Material Preparation
2.2. Q-P Treatment
- Ms is the martensitic start temperature
- Mf is the martensitic finish temperature
- QT is the quenching temperature
- PT is the partitioning temperature
- th is the heat-up time
- tp is the partitioning time
2.3. Sample Preparation
2.4. Testing Equipment and Procedure
3. Results and Discussion
3.1. Mechanical Properties
3.2. Metallographic Analysis
4. Conclusions
- (1)
- It is possible to produce profile parts with good mechanical qualities by combining the appropriate quenching rate to QT with the proper Q-P heat treatment.
- (2)
- Varying the cooling rate between Ms and QT influences the final mechanical properties more intensively without partitioning than with partitioning.
- (3)
- Partitioning periods of 600 s are sufficient for the Q-P steel guaranteeing outstanding properties in the whole profile of the part.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Element | C | Si | Cr | Mn | Fe | CEV |
---|---|---|---|---|---|---|
wt% | 0.42 | 2.0 | 1.3 | 0.68 | Bal. | 0.82 |
No. | QT [°C] | PT [°C] | tp [s] | Cooling Intensity [%] | Cooling Time [s] |
---|---|---|---|---|---|
QP1 | 200 | 250 | 600 | 100 | 20 |
QP2 | 200 | 250 | 600 | 200 | 10 |
QP3 | 200 | 250 | 600 | 50 | 40 |
QP4 | 200 | 250 | 600 | 25 | 80 |
QP5 | 200 | 250 | 600 | 12.5 | 160 |
QP6 | 200 | 250 | 600 | 6.25 | 320 |
QP7 | 200 | 250 | 600 | 3.12 | 640 |
QP8 | 200 | 250 | 600 | 1.56 | 1280 |
QP11 | 200 | RT | - | 100 | 20 |
QP22 | 200 | RT | - | 200 | 10 |
QP33 | 200 | RT | - | 50 | 40 |
QP44 | 200 | RT | - | 25 | 80 |
QP55 | 200 | RT | - | 12.5 | 160 |
QP66 | 200 | RT | - | 6.25 | 320 |
QP77 | 200 | RT | - | 3.12 | 640 |
QP88 | 200 | RT | - | 1.56 | 1280 |
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Khalaj, O.; Saebnoori, E.; Mašek, B.; Štadler, C.; Hassas, P.; Svoboda, J. The Influence of Cooling Rate between Ms and Mf on the Mechanical Properties of Low Alloy 42SiCr Steel Treated by the Q-P Process. Metals 2022, 12, 2081. https://doi.org/10.3390/met12122081
Khalaj O, Saebnoori E, Mašek B, Štadler C, Hassas P, Svoboda J. The Influence of Cooling Rate between Ms and Mf on the Mechanical Properties of Low Alloy 42SiCr Steel Treated by the Q-P Process. Metals. 2022; 12(12):2081. https://doi.org/10.3390/met12122081
Chicago/Turabian StyleKhalaj, Omid, Ehsan Saebnoori, Bohuslav Mašek, Ctibor Štadler, Parsa Hassas, and Jiří Svoboda. 2022. "The Influence of Cooling Rate between Ms and Mf on the Mechanical Properties of Low Alloy 42SiCr Steel Treated by the Q-P Process" Metals 12, no. 12: 2081. https://doi.org/10.3390/met12122081