304和321不銹鋼連鑄水口結瘤的不同機理

鄭宏光; 陳偉慶; 李志恩; 李學峰

doi:10.13374/j.issn1001-053x.2004.06.033

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304和321不銹鋼連鑄水口結瘤的不同機理

doi: 10.13374/j.issn1001-053x.2004.06.033

1. 北京科技大學冶金與生態工程學院, 北京 100083;
2. 太原鋼鐵公司, 太原 030003

基金項目:

國家自然科學基金和寶鋼集團聯合資助項目(No.50374011)

詳細信息

作者簡介:
鄭宏光男,37歲,高工,博士研究生

中圖分類號: TF771.1
計量
- 文章訪問數: 211
- HTML全文瀏覽量: 37
- PDF下載量: 10
- 被引次數: 0
出版歷程
- 收稿日期: 2004-01-14
- 網絡出版日期: 2021-08-17

Different Mechanisms of Clogging in Continuous Casting of Type 304 and 321 Stainless Steels

1. Metallurgical and Ecological Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Taiyuan Iron&Steel Co. Ltd., Taiyuan 030003, China

摘要

摘要: 分析了304和321不銹鋼連鑄水口結瘤物的物相,探討了結瘤機理.結果表明,304水口結瘤物主要由Al₂O₃,MgO·Al₂O₃和少量細小的金屬顆粒構成,結瘤層較薄,對正常澆鑄的影響不顯著,控制鋼中Al<0.01%,可改善其結瘤.321連鑄水口結瘤有TiN和CaO·TiO₂兩種類型:TiN型結瘤物主要由TiN和少量金屬組成,控制措施是保持鋼中鈦氮積小于3.5,Al<0.01%;CaO·TiO₂型結瘤物由CaO·TiO₂-MgO·Al₂O₃和大量金屬構成,盡可能減少鋼中CaO·TiO₂-MgO·Al₂O₃雙相夾雜物的數量和避免二次氧化,可改善CaO·TiO₂型結瘤,適當提高澆鑄溫度可緩解CaO·TiO₂型結瘤.
- 不銹鋼 /
- 連鑄 /
- 浸入式水口 /
- 結瘤
Abstract: The clogs on the submerged entry nozzle of type 304 and 321 stainless steels were investigated, and the mechanisms of clogging were discussed. The results indicated that deposits on the nozzle in type 304 stainless steel consists of Al₂O₃, MgO·Al₂O₃ and some metal. Because of the thin deposits, the casting was not affected obviously and could be improved by controlling [Al] < 0.01 %. There are two kinds of clogging, namely TiN-type and CaO·TiO₂-type clogging, in the casting of type 321 stainless steel. TiN-type clogging consists of a lot of TiN inclusions and some metal, and could be improved by [Ti%]·[N%]×10³ < 3.5 and [Al] < 0.01% in liquid. CaO·TiO₂ type clogging consists of CaO-TiO₂-MgO-Al₂O₃ and a lot of metal, and could be improved obviously by reducing the amount of CaO-TiO₂-MgO-Al₂O₃ inclusions in molten steel.
- stainless steel /
- continuous casting /
- submerged entry nozzle /
- clogging