工程科学学报，第37卷，增刊1：15,2015年5月 Chinese Journal of Engineering,Vol.37,Suppl.1:1-5,May 2015 DOI:10.13374/j.issn2095-9389.2015.s1.001:http://journals.ustb.edu.cn 钢液中夹杂物粒径与全氧的关系 敏2)四，包燕平1》，赵立华》，林路2)，杨荃2) 1)北京科技大学钢铁治金新技术国家重点实验室，北京1000832)北京科技大学国家板带生产先进装备工程技术研究中心，北京100083 3)北京科技大学治金与生态工程学院，北京100083 ☒通信作者，E-mail:worldmind@163.com 摘要研究了钢中夹杂物粒径，分布状态与全氧的对应关系，并探讨了大颗粒夹杂物含量与试样中全氧波动的相关性，量 化了全氧检测法对洁净度的评价，结果表明：(1)钢中单位体积内夹杂物数量随粒径增大呈指数下降，粒径小于10m夹杂物 占总夹杂物数量的95%以上，夹杂物在钢中分布的均匀性随夹杂物粒径增大而降低：(2)钢中粒径小于10um夹杂物中含氧 量与钢中平均全氧有很好对应关系，全氧可以反映钢中分布均匀的夹杂物水平：(3)钢中大颗粒夹杂物越多，同一试样中全氧 多次检测结果的波动越大，全氧的波动可以反映钢中大颗粒夹杂物的含量 关键词夹杂物：粒径分布：全氧：洁净度 分类号TF762+.5 Relationship between the size of inclusions in steel and total oxygen (T.O) WANG Min,BAO Yan-ping',ZHAO Li-hud,LIN Lu,YANG Quan 1)State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing.Beijing 100083,China 2)National Engineering Research Center of Flat Rolling Equipment,University of Science and Technology Beijing,Beijing 100083,China 3)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:worldmind@163.com ABSTRACT The relationship between the size distribution of inclusions and the total oxygen in steel was studied by following the inclusions'size and number of the samples at different locations.The content of macro-inclusions in liquid steel could be estimated accurately by the fluctuation of total oxygen in the same sample,which quantified the cleanliness evaluation index.The number of inclusions per unit volume decreased exponentially with the increase in sizes.Also,the distribution uniformity of inclusions in steel worsened as the size increased.Thus,micro-inclusions with the size below 10pm occupied above 95%of total inclusions in the liquid steel,which showed a good relationship between the measured value of total oxygen and the integration oxygen in micro-inclusions. Total oxygen could represent the uniform distribution level of inclusions in steel:good uniform of inclusions in steel meant small fluctu- ation.Macro-inclusions could result in the fluctuation of total oxygen.Large fluctuation of total oxygen reflected a high amount of mac- ro-inclusions in steel. KEY WORDS inclusions:particle distribution:total oxygen:cleanness 全氧(T.O)分析法是评价钢液洁净度简单有效的相同脱氧方式下，钢液中自由氧含量差别不大，全氧的 方法，在实际生产中被广泛应用.钢中全氧一般由自 差异主要体现在以夹杂物形式存在的结合氧部分，全 由氧[O]与以夹杂物形式存在的结合氧[O]n组成， 氧可以间接反应钢中非金属夹杂物的含量水平.正确 收稿日期：20150106 基金项目：中央高校基本科研业务费项目(RF-P-14一125A2):钢铁治金新技术国家重点实验室开发基金资助项目(KF13O9):教有部博士 点专项基金资助项目(20130006110023：“十二五”国家科技支撑计划资助项目(2012BAF04B02)工程科学学报，第 37 卷，增刊 1: 1--5，2015 年 5 月 Chinese Journal of Engineering，Vol． 37，Suppl． 1: 1--5，May 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． s1． 001; http: / /journals． ustb． edu． cn 钢液中夹杂物粒径与全氧的关系 王 敏1，2) ，包燕平1，3) ，赵立华3) ，林 路1，2) ，杨 荃2) 1) 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083 2) 北京科技大学国家板带生产先进装备工程技术研究中心，北京 100083 3) 北京科技大学冶金与生态工程学院，北京 100083  通信作者，E-mail: worldmind@ 163． com 摘 要 研究了钢中夹杂物粒径、分布状态与全氧的对应关系，并探讨了大颗粒夹杂物含量与试样中全氧波动的相关性，量 化了全氧检测法对洁净度的评价，结果表明: ( 1) 钢中单位体积内夹杂物数量随粒径增大呈指数下降，粒径小于 10 μm 夹杂物 占总夹杂物数量的 95% 以上，夹杂物在钢中分布的均匀性随夹杂物粒径增大而降低; ( 2) 钢中粒径小于 10 μm 夹杂物中含氧 量与钢中平均全氧有很好对应关系，全氧可以反映钢中分布均匀的夹杂物水平; ( 3) 钢中大颗粒夹杂物越多，同一试样中全氧 多次检测结果的波动越大，全氧的波动可以反映钢中大颗粒夹杂物的含量． 关键词 夹杂物; 粒径分布; 全氧; 洁净度 分类号 TF762 + . 5 Relationship between the size of inclusions in steel and total oxygen ( T． O) WANG Min1，2)  ，BAO Yan-ping1，3) ，ZHAO Li-hua3) ，LIN Lu1，2) ，YANG Quan2) 1) State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083，China 2) National Engineering Research Center of Flat Rolling Equipment，University of Science and Technology Beijing，Beijing 100083，China 3) School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: worldmind@ 163． com ABSTRACT The relationship between the size distribution of inclusions and the total oxygen in steel was studied by following the inclusions’size and number of the samples at different locations． The content of macro-inclusions in liquid steel could be estimated accurately by the fluctuation of total oxygen in the same sample，which quantified the cleanliness evaluation index． The number of inclusions per unit volume decreased exponentially with the increase in sizes． Also，the distribution uniformity of inclusions in steel worsened as the size increased． Thus，micro-inclusions with the size below 10 μm occupied above 95% of total inclusions in the liquid steel，which showed a good relationship between the measured value of total oxygen and the integration oxygen in micro-inclusions． Total oxygen could represent the uniform distribution level of inclusions in steel; good uniform of inclusions in steel meant small fluctu￾ation． Macro-inclusions could result in the fluctuation of total oxygen． Large fluctuation of total oxygen reflected a high amount of mac￾ro-inclusions in steel． KEY WORDS inclusions; particle distribution; total oxygen; cleanness 收稿日期: 2015--01--06 基金项目: 中央高校基本科研业务费项目( FRF--TP--14--125A2) ; 钢铁冶金新技术国家重点实验室开发基金资助项目( KF13--09) ; 教育部博士 点专项基金资助项目( 20130006110023) ; “十二五”国家科技支撑计划资助项目( 2012BAF04B02) 全氧( T． O) 分析法是评价钢液洁净度简单有效的 方法，在实际生产中被广泛应用． 钢中全氧一般由自 由氧［O］Free与以夹杂物形式存在的结合氧［O］in组成， 相同脱氧方式下，钢液中自由氧含量差别不大，全氧的 差异主要体现在以夹杂物形式存在的结合氧部分，全 氧可以间接反应钢中非金属夹杂物的含量水平． 正确