In-situ Observation of Acicular Ferrite in High Strength Ship-building Plate Steel

Gao Lina; Zhang Caijun; Gu Kejing; Zhu Liguang

doi:10.7513/j.issn.1004-7638.2017.01.025

Volume 38 Issue 1

Feb. 2017

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Gao Lina, Zhang Caijun, Gu Kejing, Zhu Liguang. In-situ Observation of Acicular Ferrite in High Strength Ship-building Plate Steel[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(1): 143-147. doi: 10.7513/j.issn.1004-7638.2017.01.025

Citation:

Gao Lina, Zhang Caijun, Gu Kejing, Zhu Liguang. In-situ Observation of Acicular Ferrite in High Strength Ship-building Plate Steel[J]. IRON STEEL VANADIUM TITANIUM, 2017, 38(1): 143-147. doi: 10.7513/j.issn.1004-7638.2017.01.025

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In-situ Observation of Acicular Ferrite in High Strength Ship-building Plate Steel

doi: 10.7513/j.issn.1004-7638.2017.01.025

1. High-quality Steel Continuous Casting Laboratory, North China University of Science and Technology, Tangshan 063009, Hebei, China;
2. Guofeng Iron and Steel Co., Ltd., Tangshan 063009, Hebei, China

Received Date: 2016-06-08

Abstract

Abstract

The acicular ferrite in high strength ship plate steel was observed by confocal scanning laser microscope （CSLM）,and morphology in steel of in situ observation was investigated by using optical microscopy.The results show that holding time of 900 s is in favor of acicular ferrite nucleation.The austenite grain size increases with increasing holding time.The austenite size that is acquired at 900 s of the holding time is more conducive to the nucleation of acicular ferrite. The starting formation temperature of ferrite firstly decreases with increasing holding time,then increases. The ending formation temperature of ferrite decreases with increasing holding time.
- ship-building plate steel,
- CSLM,
- AF,
- inclusion,
- austenite grain size,