超低碳钢AISI 1006铸坯夹杂物的分布及工艺改进
为研究90 t BOF-RH-LF-CC流程生产的超低碳钢AISI1006夹杂物控制情况,通过对200 mm x 200 mm铸坯横断面不同位置夹杂物进行统计分析,结果表明:钢中小颗粒夹杂占比较大,尺寸5～10 μm的夹杂物占比达到91.0％,10～13μm的占比3.6％,13 μm以上占比5.4％.尺寸较大夹杂主要分布于铸坯中心.在铸坯1/4边长处夹杂物分布最多,其次是近中心处,铸坯近表面处夹杂物最少.铸坯内夹杂物主要为A12O3、A12O3·CaO·(CaS·MnS)、A12O3·CaO·MgO·(CaS·MnS)、MgO·Al2O3·(CaS·MnS)复合夹杂物,为内生夹杂物.开展工艺优...
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| Published in: | 特殊钢 Vol. 43; no. 6; pp. 95 - 100 |
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| Format: | Journal Article |
| Language: | Chinese |
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江苏沙钢集团淮钢特钢股份有限公司技术中心,淮安223002
2022
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| Abstract | 为研究90 t BOF-RH-LF-CC流程生产的超低碳钢AISI1006夹杂物控制情况,通过对200 mm x 200 mm铸坯横断面不同位置夹杂物进行统计分析,结果表明:钢中小颗粒夹杂占比较大,尺寸5～10 μm的夹杂物占比达到91.0％,10～13μm的占比3.6％,13 μm以上占比5.4％.尺寸较大夹杂主要分布于铸坯中心.在铸坯1/4边长处夹杂物分布最多,其次是近中心处,铸坯近表面处夹杂物最少.铸坯内夹杂物主要为A12O3、A12O3·CaO·(CaS·MnS)、A12O3·CaO·MgO·(CaS·MnS)、MgO·Al2O3·(CaS·MnS)复合夹杂物,为内生夹杂物.开展工艺优化改进,RH高真空保持时间控制在15 min以上,LF精炼做好脱氧造渣及脱硫,精炼时间控制在90 min以内,精炼终渣碱度在6～7,出站前喂入硅钙线进行变性处理,软吹时间控制在25 min以上,连铸做好保护浇注,中间包开大氩气流量吹扫10 min以上,避免二次氧化,将夹杂物往钙铝酸盐方向控制,工艺优化后,钢水T.O含量≤20×10-6,B、D、Ds夹杂级别≤1.0. |
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| AbstractList | 为研究90 t BOF-RH-LF-CC流程生产的超低碳钢AISI1006夹杂物控制情况,通过对200 mm x 200 mm铸坯横断面不同位置夹杂物进行统计分析,结果表明:钢中小颗粒夹杂占比较大,尺寸5～10 μm的夹杂物占比达到91.0％,10～13μm的占比3.6％,13 μm以上占比5.4％.尺寸较大夹杂主要分布于铸坯中心.在铸坯1/4边长处夹杂物分布最多,其次是近中心处,铸坯近表面处夹杂物最少.铸坯内夹杂物主要为A12O3、A12O3·CaO·(CaS·MnS)、A12O3·CaO·MgO·(CaS·MnS)、MgO·Al2O3·(CaS·MnS)复合夹杂物,为内生夹杂物.开展工艺优化改进,RH高真空保持时间控制在15 min以上,LF精炼做好脱氧造渣及脱硫,精炼时间控制在90 min以内,精炼终渣碱度在6～7,出站前喂入硅钙线进行变性处理,软吹时间控制在25 min以上,连铸做好保护浇注,中间包开大氩气流量吹扫10 min以上,避免二次氧化,将夹杂物往钙铝酸盐方向控制,工艺优化后,钢水T.O含量≤20×10-6,B、D、Ds夹杂级别≤1.0. |
| Author | 张洪才 李润 许正周 林鹏 印传磊 翟万里 |
| AuthorAffiliation | 江苏沙钢集团淮钢特钢股份有限公司技术中心,淮安223002 |
| AuthorAffiliation_xml | – name: 江苏沙钢集团淮钢特钢股份有限公司技术中心,淮安223002 |
| Author_FL | Yin Chuanlei Zhai Wanli Lin Peng Xu Zhengzhou Zhang Hongcai Li Run |
| Author_FL_xml | – sequence: 1 fullname: Li Run – sequence: 2 fullname: Yin Chuanlei – sequence: 3 fullname: Zhai Wanli – sequence: 4 fullname: Zhang Hongcai – sequence: 5 fullname: Lin Peng – sequence: 6 fullname: Xu Zhengzhou |
| Author_xml | – sequence: 1 fullname: 李润 – sequence: 2 fullname: 印传磊 – sequence: 3 fullname: 翟万里 – sequence: 4 fullname: 张洪才 – sequence: 5 fullname: 林鹏 – sequence: 6 fullname: 许正周 |
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| DOI | 10.20057/j.1003-8620.2022-00130 |
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| DocumentTitle_FL | Distribution and Improvement Process of AISI 1006 Casting Bloom Inclusion of Ultra-Low Carbon Steel |
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| Keywords | 工艺改进 200 mm×200 mm铸坯 超低碳钢AISI 1006 夹杂物数量 成分 |
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| Publisher | 江苏沙钢集团淮钢特钢股份有限公司技术中心,淮安223002 |
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| Snippet | 为研究90 t BOF-RH-LF-CC流程生产的超低碳钢AISI1006夹杂物控制情况,通过对200 mm x 200 mm铸坯横断面不同位置夹杂物进行统计分析,结果表明:钢中小颗粒夹杂占比较大,尺寸5～10 μm的夹杂物占比达到91.0％,10～13μm的占比3.6％,13... |
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| Title | 超低碳钢AISI 1006铸坯夹杂物的分布及工艺改进 |
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