Effect of Micro-Segregation on Impact Toughness of 2.25Cr-1Mo Steel after Post Weld Heat Treatment
Abstract
:1. Introduction
2. Experimental Procedure
3. Results and Discussion
3.1. Cause Analysis of Crack Initiation Point
3.2. Cause Analysis of Crack Propagation
3.2.1. Effect of Ferrite on Impact Value
3.2.2. Effect of Carbide on Impact Value
- -
- 28J: 0.1% C Base Metal Composition = 83.51% Ferrite Volume Fraction X 0.025% C + C content of 16.49% the other constituent ==> C content of 16.49% the other constituent = 0.4798%
- -
- 386J: 0.1% C Base Metal Composition = 64.76% Ferrite Volume Fraction X 0.025% C + C content of 35.24% the other constituent ==> C content of 35.24% the other constituent = 0.2378%
4. Conclusions
Author Contributions
Acknowledgments
Conflicts of Interest
References
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Material | Chemical Composition (at. %) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
C | Si | Mn | Cu | Ni | Cr | Mo | V | Nb | Al | P | S | Fe | |
P22 | 0.102 | 0.218 | 0.433 | 0.120 | 0.1246 | 2.0948 | 0.930 | 0.011 | 0.0023 | 0.0251 | 0.0140 | 0.0048 | Bal |
0.097 | 0.227 | 0.443 | 0.124 | 0.1239 | 2.0305 | 0.931 | 0.012 | 0.0009 | 0.0247 | 0.0116 | 0.0039 | Bal | |
0.100 | 0.229 | 0.434 | 0.116 | 0.1230 | 2.0051 | 0.931 | 0.0141 | 0 | 0.0246 | 0.0098 | 0.0047 | Bal | |
Average | 0.100 | 0.225 | 0.436 | 0.120 | 0.1238 | 2.0435 | 0.931 | 0.0124 | 0.0011 | 0.0248 | 0.0118 | 0.0047 | Bal |
Condition | Actual |
---|---|
Loading Temperature | 20 °C |
Heating Rate | 20 °C/h |
Holding Temperature | 700–710 °C |
Holding Time | 11 h |
Cooling Rate (above 425 °C) | 20–30 °C/h |
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Na, H.; Lee, S.; Kang, C. Effect of Micro-Segregation on Impact Toughness of 2.25Cr-1Mo Steel after Post Weld Heat Treatment. Metals 2018, 8, 373. https://doi.org/10.3390/met8060373
Na H, Lee S, Kang C. Effect of Micro-Segregation on Impact Toughness of 2.25Cr-1Mo Steel after Post Weld Heat Treatment. Metals. 2018; 8(6):373. https://doi.org/10.3390/met8060373
Chicago/Turabian StyleNa, Hyesung, Sanghoon Lee, and Chungyun Kang. 2018. "Effect of Micro-Segregation on Impact Toughness of 2.25Cr-1Mo Steel after Post Weld Heat Treatment" Metals 8, no. 6: 373. https://doi.org/10.3390/met8060373