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Table 2
Average Vickers hardness (HV 0.2) according to microstructure for the model alloys, using the CCT diagrams. *The value given for the FeCMn bainite is the hardness of the microstructure cooled at 10 °C.s−1, with the least possible martensite.
| FeCMn | FeCMo | FeCMoMn | |
|---|---|---|---|
| Martensite | |||
| Average hardness | 433±7 | 443±4 | 448±3 |
| Cooling rate interval | 100 °C.s−1 to 300 °C.s−1 | 100 °C.s−1 to 300 °C.s−1 | 30 °C.s−1 to 300 °C.s−1 |
| Bainite | |||
| Average hardness | 240±18* | 240±3 | 305±3 |
| Cooling rate interval | 10 °C.s−1 | 2 °C.s−1 to 30 °C.s−1 | 0.1 °C.s−1 to 10 °C.s−1 |
| Ferrite + Pearlite | |||
| Average hardness | 179±4 | – | – |
| Cooling rate interval | 0.5 °C.s−1 to 5 °C.s−1 | – | – |
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