A105連鑄坯表面橫裂紋形成原因分析

陶素芬; 王福明; 李夢龍; 金桂香; 曹敏; 柴國強

doi:10.13374/j.issn1001-053x.2014.01.005

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驗證碼

A105連鑄坯表面橫裂紋形成原因分析

doi: 10.13374/j.issn1001-053x.2014.01.005

陶素芬^1,2,
王福明^1,2, ,,
李夢龍^1,2,
金桂香^1,2,
曹敏^1,2,
柴國強³

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 北京有色金屬研究總院, 北京 100088

基金項目:

國家自然科學基金資助項目（51374018；51174020）；中央高校基本科研業務費專項資金資助項目（FＲF-SD-12-010A）

詳細信息

通訊作者:
王福明,E-mail:wangfuming@metall.ustb.edu.cn

中圖分類號: TF777.2
計量
- 文章訪問數: 224
- HTML全文瀏覽量: 66
- PDF下載量: 16
- 被引次數: 0
出版歷程
- 收稿日期: 2013-01-02
- 網絡出版日期: 2021-07-10

Surface transverse crack formation study of A105 continuous casting billets

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 General Research Institute of Nonferrous Metals in Beijing, Beijing 100088, China

摘要

摘要: 應用配有能譜儀的場發射掃描電鏡分析了A105鋼中裂紋處及基體內殘余元素Cu、As和Sn以及P含量.應用Thermo-Calc熱力學計算軟件計算了A105鋼的主要析出相以及鋼液中P含量隨固相質量分數變化關系.應用Gleeble 1500熱模擬試驗機對A105鋼的高溫熱塑性進行了研究.發現P偏析是該鋼產生橫裂的主要原因，殘余元素Cu、As和Sn在晶界的偏聚加劇了裂紋的形成，矯直溫度偏低加速了裂紋的擴展，而裂紋的形成可能與AlN的析出無關，因為析出的AlN很少.
- 連鑄 /
- 鑄坯 /
- 表面裂紋 /
- 磷 /
- 偏析
Abstract: The contents of tramp elements Cu, As and Sn as well as P in A105 continuous casting billets were analyzed by field emission scanning electron microscopy (FESEM) equipped with energy dispersive spectrometry (EDS). Main precipitates in the steel and the variation of P content in molten steel with solid fraction were calculated by Thermo-Calc thermodynamic software. The hot ductility of the steel was measured by using a Gleeble 1500 thermal simulator. It is found that P segregation is the main reason for transverse cracking of the steel. The segregation of tramp elements Cu, As and Sn at grain boundaries promotes the formation of cracks. Straightening in a lower temperature zone accelerates crack propagation. AlN precipitation may have nothing to do with the formation of cracks due to little AlN.
- continuous casting /
- billets /
- surface cracks /
- phosphorus /
- segregation