Effect of Cooling Rate on Phase Transformation and Microstructure of Nb–Ti Microalloyed Steel
-
- Zhao Su
- School of Mechanical Engineering, Shanghhai Dianji University
-
- Wei Donglai
- School of Mechanical Engineering, Shanghhai Dianji University
-
- Li Rongbin
- School of Mechanical Engineering, Shanghhai Dianji University
-
- Zhang Li
- Research Institute, Baoshan Iron & Steel Co., Ltd.
書誌事項
- タイトル別名
-
- Effect of Cooling Rate on Phase Transformation and Microstructure of Nb–Ti Microalloyed Steel
この論文をさがす
抄録
The cooling rate is a key factor of controlling the slab surface microstructures during continuous casting of steel. The effect of cooling rate on phase transformation and microstructure of Nb–Ti microalloyed steel was investigated by a confocal laser scanning microscopy and a Gleeble-3800 thermal simulation machine. The process of phase transformation can be analyzed through in situ observation. A critical cooling rate of 5 K·s−1 was revealed, below which the proeutectoid ferrite along austenite grain boundaries and widmanstatten structures were observed, and carbonitrides precipitated were also observed in the proeutectoid ferrite. With the increase of cooling rate, the quantity of the precipitates decreases while the width of the proeutectoid ferrite becomes smaller. The carbonitrides precipitated along the austenite grain boundary result in the decrease of the carbon concentration near the grain boundary, which is more favorable to form the proeutectoid ferrite as well as to change its width. When the cooling rate was greater than or equal to 5 K·s−1, the precipitates were dispersed uniformly in the grain, and the bainite was observed mainly.
収録刊行物
-
- MATERIALS TRANSACTIONS
-
MATERIALS TRANSACTIONS 55 (8), 1274-1279, 2014
公益社団法人 日本金属学会
- Tweet
詳細情報 詳細情報について
-
- CRID
- 1390001204253718272
-
- NII論文ID
- 40020140710
- 130004455360
-
- NII書誌ID
- AA1151294X
-
- ISSN
- 13475320
- 13459678
-
- NDL書誌ID
- 025617282
-
- 本文言語コード
- en
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可