D0L:10.13374/.issn1001-053x.2013.09.005 第35卷第9期 北京科技大学学报 Vol.35 No.9 2013年9月 Journal of University of Science and Technology Beijing Sep.2013 钙处理对铝镇静钢中非金属夹杂物变性效果的影响 赵东伟1)，包燕平1)区，王敏)，马文俊)，苏利川2) 1)北京科技大学治金与生态工程学院，北京100083 2)杭州钢铁集团公司技术中心，杭州310022 ☒通信作者，E-mail:baoyp@ustb.cdu.cn 摘要通过对LF前一LF后一中间包一连铸工艺生产40Gr钢各环节系统取样，以及电子显微镜对夹杂物的形 貌、尺寸及组成的分析，发现40Cr铸坯中含有大量CaO(CaS)-Al2Og-MgO类复合夹杂.采用Factsage计算得到的 CaO-CaS-Al2O3三元相图对钙处理后CaO(CaS)-Al2O3夹杂形成过程进行了理论计算：并对实际发现的CaO(CaS)- Al2O3-MgO类复合夹杂物的面扫描分布进行描边处理，探讨了该类夹杂物的组成和形成过程.经Factsage理论计算发 现，CaO-CaS-Al203三元相图中液相区各成分质量分数为CaO32%58%、CaS0%5%以及Al2O342%65%,钙处理 后CaO含量有逐渐增加，CaS含量有逐渐减小趋势.结合夹杂物的面扫描分布发现，CaO(CaS)-Al2Og-MgO类复合夹 杂物的组成为xCaO-yAl2O3+mMg0-nAl2O3+Al2O3+CaS,钙处理后Ca能够使Al2O3变性为CaO-Al2O3,但同时夹 杂物中也有很高的CaS成分，随着钙处理的充分进行，CaS将由内及外向CaO-Al2O3逐渐转变 关键词炼钢：钙处理：夹杂物：改性 分类号TF704.7 Effectiveness of calcium treatment on nonmetallic inclusions in Al- killed steel ZHAO Dong-wei12),BAO Yan-ping,WANG Min,MA Wen-jun )SU Li-chuan?) 1)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Technology Center,Hangzhou Iron and Steel Group Company,Hangzhou 310022,China Corresponding author,E-mail:baoyp@ustb.edu.cn ABSTRACT Massive CaO(CaS)-Al2Os-MgO complex inclusions were found in 40Cr casting billet samples based on systematic sampling during the processes of before LF-after LF-tundish-continuous casting and electron microscopy analysis on inclusion morphology,size and composition.The formation of CaO(CaS)-Al2Os complex inclusions was the- oretically calculated in the CaO-CaS-Al2Os ternary phase diagram obtained by Factsage;the composition and formation process of CaO(CaS)-Al2O3-MgO complex inclusions were studied by further stroke treatment on surface scan distribu- tion.Factsage calculations show that the contents of components in the liquid region of the CaO-CaS-Al2Os ternary phase diagram are 32%to 58%CaO,0%to 5%CaS,and 42%to 65%Al2Os.The CaO content increases and the Cas content decreases gradually after calcium treatment.In combination with the scanning plane distribution of inclusions,it is found that the CaO(CaS)-Al2O3-MgO complex inclusions are rCaO.yAl2Os+mMgO.nAl2O3+Al2O3+CaS.Moreover, Ca can make Al2Os become CaO-Al2O3 while the inclusions have very high CaS content after calcium treatment.Along with calcium treatment carrying on,Cas will gradually transform into CaO-Al2O3 from the inner to the outward. KEY WORDS steelmaking:calcium treatment;inclusions;modification 收稿日期：2012-07-07 基金项目：因家自然科学基金资助项目(51074019)第 35 卷 第 9 期 北 京 科 技 大 学 学 报 Vol. 35 No. 9 2013 年 9 月 Journal of University of Science and Technology Beijing Sep. 2013 钙处理对铝镇静钢中非金属夹杂物变性效果的影响 赵东伟1)，包燕平1) ，王 敏1)，马文俊1)，苏利川2) 1) 北京科技大学冶金与生态工程学院，北京 100083 2) 杭州钢铁集团公司技术中心，杭州 310022 通信作者，E-mail: baoyp@ustb.edu.cn 摘 要 通过对 LF 前 —LF 后 — 中间包 — 连铸工艺生产 40Cr 钢各环节系统取样，以及电子显微镜对夹杂物的形 貌、尺寸及组成的分析，发现 40Cr 铸坯中含有大量 CaO(CaS)-Al2O3-MgO 类复合夹杂. 采用 Factsage 计算得到的 CaO-CaS-Al2O3 三元相图对钙处理后 CaO(CaS)-Al2O3 夹杂形成过程进行了理论计算；并对实际发现的 CaO(CaS)- Al2O3-MgO 类复合夹杂物的面扫描分布进行描边处理，探讨了该类夹杂物的组成和形成过程. 经 Factsage 理论计算发 现，CaO-CaS-Al2O3 三元相图中液相区各成分质量分数为 CaO 32%∼58%、CaS 0%∼5%以及 Al2O3 42%∼65%，钙处理 后 CaO 含量有逐渐增加，CaS 含量有逐渐减小趋势. 结合夹杂物的面扫描分布发现，CaO(CaS)-Al2O3-MgO 类复合夹 杂物的组成为 xCaO·yAl2O3 + mMgO·nAl2O3+Al2O3+CaS，钙处理后 Ca 能够使 Al2O3 变性为 CaO-Al2O3，但同时夹 杂物中也有很高的 CaS 成分，随着钙处理的充分进行，CaS 将由内及外向 CaO-Al2O3 逐渐转变. 关键词 炼钢；钙处理；夹杂物；改性 分类号 TF704.7 Effectiveness of calcium treatment on nonmetallic inclusions in Al￾killed steel ZHAO Dong-wei 1,2), BAO Yan-ping 1) , WANG Min 1), MA Wen-jun 1), SU Li-chuan 2) 1) School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2) Technology Center, Hangzhou Iron and Steel Group Company, Hangzhou 310022, China Corresponding author, E-mail: baoyp@ustb.edu.cn ABSTRACT Massive CaO(CaS)-Al2O3-MgO complex inclusions were found in 40Cr casting billet samples based on systematic sampling during the processes of before LF – after LF – tundish – continuous casting and electron microscopy analysis on inclusion morphology, size and composition. The formation of CaO(CaS)-Al2O3 complex inclusions was the￾oretically calculated in the CaO-CaS-Al2O3 ternary phase diagram obtained by Factsage; the composition and formation process of CaO(CaS)-Al2O3-MgO complex inclusions were studied by further stroke treatment on surface scan distribu￾tion. Factsage calculations show that the contents of components in the liquid region of the CaO-CaS-Al2O3 ternary phase diagram are 32% to 58% CaO, 0% to 5% CaS, and 42% to 65% Al2O3. The CaO content increases and the CaS content decreases gradually after calcium treatment. In combination with the scanning plane distribution of inclusions, it is found that the CaO(CaS)-Al2O3-MgO complex inclusions are xCaO·yAl2O3+mMgO·nAl2O3+Al2O3+CaS. Moreover, Ca can make Al2O3 become CaO-Al2O3 while the inclusions have very high CaS content after calcium treatment. Along with calcium treatment carrying on, CaS will gradually transform into CaO-Al2O3 from the inner to the outward. KEY WORDS steelmaking; calcium treatment; inclusions; modification 收稿日期：2012-07-07 基金项目：国家自然科学基金资助项目 (51074019) DOI:10.13374/j.issn1001-053x.2013.09.005