電渣重熔易切削鋼中硫含量及夾雜物的控制

侯棟; 王德永; 屈天鵬; 田俊; 姜周華

doi:10.13374/j.issn2095-9389.2018.s1.003

電渣重熔易切削鋼中硫含量及夾雜物的控制

doi: 10.13374/j.issn2095-9389.2018.s1.003

1. 蘇州大學沙鋼鋼鐵學院;
2. 東北大學冶金學院

基金項目:

中國博士后基金資助項目 (7131704818)

江蘇省高校自然科學研究資助項目 (18KJB450002)

國家自然科學基金資助項目 (51674172, 51804205, 51874203)

詳細信息

通訊作者:
王德永, E-mail:dywang@suda.edu.cn

中圖分類號: TF142
計量
- 文章訪問數: 24
- HTML全文瀏覽量: 8
- PDF下載量: 0
- 被引次數: 0
出版歷程
- 收稿日期: 2018-01-10
- 網絡出版日期: 2023-07-18

Sulfur content and inclusion control during electroslag remelting of die steel

1. School of Iron and Steel,Soochow University;
2. School of Metallurgy,Northeastern University

摘要

摘要: 基于熱力學分析了電渣重熔中渣系及冶煉工藝對易切削鋼AS136的夾雜物及硫均勻性的控制研究.實驗采用4 t的非保護氣氛電渣爐, 分析了電渣錠中硫含量及夾雜物級別.實驗結果發現:采用渣系S1 (質量分數為50%Ca F₂+30%Al₂O₃+20%Si O₂) 冶煉的電渣錠中硫質量分數為0.066%⁰.075%, 能夠滿足產品要求 (產品中要求硫質量分數在0.05%⁰.10%) , 但是B類和C類的夾雜物級別均達不到標準;在渣系S3 (質量分數為70%Ca F₂+28%Al₂O₃+2%MgO) 以及整個重熔中持續地加入質量分數4.5%鎂砂的冶煉工藝下, 不僅可以使電渣錠中硫含量呈均勻分布, 同時還能夠改善夾雜物的分布和大小.分析結果表明:隨著電渣重熔初期渣溫的升高以及渣中Si O₂質量分數的增加, 持續均勻地補加鎂砂可以使得電渣錠中的硫沿軸向呈均勻分布.
- 電渣重熔 /
- 脫硫 /
- 夾雜物 /
- 熱力學 /
- 分子離子共存理論
Abstract: Experimental and theoretical studies were carried out to investigate the effects of the slag and remelting process on sulfur content and steel cleanliness control during electroslag remelting (ESR) process.AS136 die steel was used as the electrode and remelted under three different remelting conditions by using a 4 t ESR furnace.The contents of sulfur and inclusion along the axial direction of ingot products were analyzed.It was found that the sulfur content in ingot remelting with slag S1 (50%Ca F₂+30%Al₂O₃+20%Si O₂in mass fraction) ranges from 0.066%to 0.075%in mass fraction, which can satisfy the requirement of AS136 steel (the sulfur content ranges from 0.05%to 0.1%in mass fraction) , but the levels of B-alumina type and C-silicate type inclusions are higher than the standards.Under the condition of slag S3 (70%Ca F₂+28%Al₂O₃+2%MgO in mass fraction) combined with extra 4.5%MgO in mass fraction continuously added into molten slag during the whole ESR process, the macrosegregation of sulfur along the height of ingot can be improved, the oxygen and inclusion contents reduce.Constant addition of extra amounts of MgO to the molten slag with the increase of slag temperature and Si O₂content in slag during the remelting process can improve the macrosegregation of sulfur distributed along the axial direction of ESR ingots.
- electroslag remelting /
- desulfurization /
- inclusion /
- thermodynamic /
- ion and molecule coexistence theory

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參考文獻(15)

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