321不銹鋼浸入式水口結瘤研究

鄭建超; 潘超; 崔崇煒; 林平; 胡曉軍

doi:10.13374/j.issn2095-9389.2018.s1.012

321不銹鋼浸入式水口結瘤研究

doi: 10.13374/j.issn2095-9389.2018.s1.012

1. 北京科技大學鋼鐵冶金新技術國家重點實驗室;
2. 瑞浦科技集團有限公司

基金項目:

國家自然科學基金資助項目 (51474019)

詳細信息

通訊作者:
胡曉軍, E-mail:huxiaojun@ustb.edu.cn

中圖分類號: TF341
計量
- 文章訪問數: 31
- HTML全文瀏覽量: 9
- PDF下載量: 0
- 被引次數: 0
出版歷程
- 收稿日期: 2018-01-23
- 網絡出版日期: 2023-07-18

Study on clogging of submerged entry nozzle of 321 stainless steel

1. State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing;
2. Ruipu Technology Group Co.Ltd.

摘要

摘要: 通過對321不銹鋼 (06Cr18Ni11Ti) 浸入式水口結瘤物的掃描電鏡 (scanning electron microscopy, SEM) 觀察和能譜 (energy disperse spectroscope, EDS) 分析, 并結合理論計算, 探討了水口結瘤機理.根據成分變化, 將浸入式水口試樣從外層到內層分別定義為:耐材層、反應層和鋼基體層.結果顯示, 水口結瘤首先是鋼液侵蝕水口, 形成高熔點渣相, 然后鋼中Ti N夾雜黏結水口內壁并通過與渣相連接形成鏈狀或網狀結構而導致的.對鋼中Ti N形成的熱力學計算表明溫度越高其溶度積越大, 對黏結相Ca O-Al₂O₃-Ti O₂-5%MgO的相圖分析顯示其成分中鈣鋁比較高, 為防止結瘤, 要合理控制爐渣成分.
- 不銹鋼 /
- 浸入式水口 /
- 結瘤 /
- 溶度積 /
- 鈣處理
Abstract: The 06Cr18Ni11Ti (321) stainless steel has good corrosion resistance and mechanical properties.However, the addition of Ti leads to the formation of Ti N inclusions, which deteriorates the condition of continuous casting and causes the clogging.The formation of clogging in the submerged entry nozzle (SEN) of 321 stainless steel was studied by scanning electron microscopy (SEM) , energy disperse spectroscope (EDS) and thermodynamic calculation.According to the change of components, three layers in sample were defined:the refractory materials layer, the reaction layer and metal layer from the outer layer to the inner layer of SEN.The results show that the molten steel corrodes the refractory materials of SEN and the high-melting-point slag phase forms.Then Ti N inclusions attach to the inner layer and form curved chain or reticular structure with slag phase, which causes the clogging of SEN.Resultsof thermodynamic calculation indicate that the equilibrium solubility of titanium and nitrogen increases with temperature.There is high Ca/Al proportion in Ca O-Al₂O₃-Ti O₂-5%MgO phase.So controlling the compositions of slag is needed to prevent clogging.
- stainless steel /
- submerged entry nozzle /
- clogging /
- equilibrium solubility /
- c alcium treatment

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參考文獻(16)

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