Research Article
Austenite Grain Growth Kinetics in API X65 and X70 Line-Pipe Steels during Isothermal Heating
Table 2
Grain size (
,
m) of X65 and X70 grades with reheating time.
| Holding time, s | Reheating temperature °C | 1150°C | 1200°C | 1250°C | X65 | X70 | X65 | X70 | X65 | X70 |
| 600 | 48.33 | 36.18 | 61.37 | 41.58 | 69.34 | 52.03 | 1200 | 55.39 | 40.62 | 70.26 | 45.88 | 78.90 | 57.84 | 1800 | 65.06 | 45.92 | 80.03 | 52.43 | 87.16 | 63.94 | 2700 | 74.4 | 52.01 | 88.35 | 56.59 | 95.69 | 67.54 | 3600 | 82 | 56.12 | 95.31 | 62.24 | 98.54 | 73.93 |
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