杨顺虎, 朱苗勇, 王忠英. Effect of Controlling Rolling and Cooling Parameters on Low Temperature Impact Toughness of Q345E Steel for Wind Power Flange[J]. Special Steel, 2015, 36(3): 64-66.
杨顺虎, 朱苗勇, 王忠英. Effect of Controlling Rolling and Cooling Parameters on Low Temperature Impact Toughness of Q345E Steel for Wind Power Flange[J]. Special Steel, 2015, 36(3): 64-66.DOI:
The production flowsheet for low alloy high Strength steel Q345E (/% : 0. 12 ~ 0. 15C
0. 20 ~ 0. 25Si
1. 40 ~ 1. 50Mn, ≤0. 010P
≤0. 005S) is 80 t top and bottom combined blown converter- LF- RH- Φ450 mm bloom CC-Φ110 mm bar continuous rolling process. The effect of reduction ratio ( 10. 33 ~ 20. 25)
beginning rolling temperature (1 120 ~ 1 080 ℃ ) and cooling mode (0. 2 ℃/s air cooling and 0. 5 ℃/s wind cooling) on V-notch impact energy of steel at -40 ℃ has been commercial-tested. Results show that with increasing reduction ratio
decreasing beginning rolling temperature and increasing cooling speed the impact energy of steel at -40 ℃ obviously increases; and with using reduction ratio 16. 74
beginning rolling at 1 100 °C and 0. 5 °C/s wind cooling process
the steel Q345E has fine and homogeneous structure and its impact energy at -40 ℃ is 40 J.