冷卻速度對La脫氧鋼中晶內鐵素體形成的影響

李紅科; 宋波; 王利勇; 胡春林; 毛璟紅

doi:10.13374/j.issn2095-9389.2015.02.007

冷卻速度對La脫氧鋼中晶內鐵素體形成的影響

doi: 10.13374/j.issn2095-9389.2015.02.007

李紅科^1,2,3,
宋波^1,2, ,,
王利勇^1,2,
胡春林^1,2,
毛璟紅⁴

1. 北京科技大學鋼鐵冶金新技術國家重點實驗室, 北京 100083;
2. 北京科技大學冶金與生態工程學院, 北京 100083;
3. 中鋼集團吉林機電設備有限公司, 吉林 132021;
4. 北京科技大學材料學與工程學院, 北京 100083

基金項目:

中央高校基本科研業務費專項資金資助項目(FRF-SD-12-010A)

國家自然科學基金資助項目(51274269)

詳細信息

通訊作者:
宋波,E-mail:songbo@metall.ustb.edu.cn

中圖分類號: TG142.1⁺3
計量
- 文章訪問數: 323
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- 被引次數: 0
出版歷程
- 收稿日期: 2013-10-08
- 網絡出版日期: 2021-07-10

Effect of cooling rate on intragranular ferrite formation in La deoxidized steel

LI Hong-ke^1,2,3,
SONG Bo^{1,2
, ,},
WANG Li-yong^1,2,
HU Chun-lin^1,2,
MAO Jing-hong⁴

1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing, Beijing 100083, China;
3. Sino-steel Jilin Electro-mechanical Equipment Co., Ltd., Jilin 132021, China;
4. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

摘要

摘要: 采用光學顯微鏡、帶能譜的掃描電子顯微鏡等分析技術觀察了不同冷速下La脫氧鋼的顯微組織，并繪制了靜態連續冷卻轉變圖．實驗結果發現，在4~10℃·s^-1的冷速范圍內，鋼中會有大量晶內鐵素體形成，其中在8℃·s^-1冷卻時可以獲得大量細小且彌散分布的晶內針狀鐵素體．La脫氧鋼中含La夾雜物與α-Fe相有較低錯配度，其中La₂O₂S夾雜物與α—Fe相的品格錯配度最小為0．2％，鋼中含La夾雜物均可誘導晶內針狀鐵素體形核并可促進感生形核．進而細化組織．
- 低合金鋼 /
- 鑭 /
- 冷卻速度 /
- 鐵素體 /
- 顯微組織
Abstract: The microstructures of La deoxidized steels obtained at different cooling rates were investigaled by optical microscopy and scanning electron microscopy coupled to an energy dispersive X-ray spectrometer. The continuous cooling transformation diagram of the tested steel was also drawn in this paper. It is found that in the cooling rate range of 4 to 10℃·s^-1, intragranular ferrite can form in the steel. While at the cooling rate of 8℃·s^-1, the microstructure mainly consists of fine and dispersed intragranular acicular ferrite (IAF). The lattice disregistry between lanthanum-containing inclusions and α-Fe is small; especially, this value of La₂O₂S is 0.2%. These kinds of inclusions can induce IAF nucleation and sympathetic nucleation, and also make grains refined.
- low alloy steels /
- lanthanum /
- cooling rate /
- ferrite /
- microstructure