工程科学学报，第37卷，增刊1：3544,2015年5月 Chinese Journal of Engineering,Vol.37,Suppl.1:35-44,May 2015 DOI:10.13374/j.issn2095-9389.2015.s1.007:http://journals.ustb.edu.cn 采用ASPEX扫描电镜研究钢中总氧和非金属夹杂物 的定量关系 于会香12)四，邵肖静》，张静，王新华” 1)北京科技大学治金与生态工程学院，北京1000832)北京科技大学钢铁治金新技术国家重点实验室，北京100083 3)首钢技术研究院，北京1000414)南京钢铁股份有限公司中厚板卷厂，南京210035 ☒通信作者，E-mail:yuhuixiang(@usth.cdu.cn 摘要为了弄清钢中总氧(T.O)和非金属夹杂物的量、尺寸之间的关系，本文选取四类钢种正常生产的铸坯，采用能进行 大面积试样检测的ASPEX自动扫描电镜系统研究了钢中的T.O、夹杂物及两者之间的定量关系，并采用Thermo-ealc热力学 软件进行了计算和验证.结果表明：夹杂物的主要组成与钢的生产工艺有很大关系。随着夹杂物尺寸的增加，单位检测面积 上该尺寸范围的夹杂物数量显著减少.与T.0<0.002%的钢种相比，T.0为0.01%的钢中夹杂物的数量、面积均明显增加. 当T.0<0.002%时，T.0与夹杂物的面积表现出较好的对应关系.相比于夹杂物的数量来说，T.0更准确的表征夹杂物的面 积.大型夹杂物的出现具有偶然性.实验结果与热力学计算结果、钢中氧硫含量吻合很好. 关键词钢洁净度：总氧：非金属夹杂物：ASPEX自动扫描电镜：热力学计算 分类号TF769.2 Study on the quantitative relationship between total oxygen content and non-metallic inclusion in steel with ASPEX SEM YU Hui-xiang,SHAO Xiao-jing,ZHANG Jing,WANG Xin-hua 1)School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing,Beijing 100083,China 3)Shougang Research Institute of Technology,Beijing 100041,China 4)Wide Plate and Coil Plant,Nanjing Iron and Steel Co.,Ltd.,Nanjing 210035,China Corresponding author,E-mail:yuhuixiang@ustb.edu.cn ABSTRACT The total oxygen content (T.O),non-metallic inclusions and the relationship between them in pipeline steel,gear steel,tire cord steel and Q235 steel,which were taken from industrial products,were systematically investigated by ASPEX automatic scanning electron microscope (SEM),which can scan large area metallographic specimen,and thermodynamic software Thermo-Cale was used to calculate and validate.The obtained results indicate that non-metallic inclusions are greatly influenced by the production process of steel.With the inclusion size increasing,the amount of inclusions in this size range decreases.Both quantity and area of in- clusions increase sharply when T.O increases from less than 0.002%to 0.01%.When T.O is lower than 0.002%,it only shows good positive relationship with the area of all inclusions per square mm steel samples.T.O indicates the area of inclusions in steel more accurately than the quantity of inclusions.Large sized inclusions appear accidentally.The experimental results agree very well with thermodynamic calculations and the content of T.0,[S]in steel. KEY WORDS steel cleanliness:total oxygen content;non-metallic inclusion:ASPEX scanning electron microscope:thermodynam- ic calculation 收稿日期：20150105 基金项目：国家重点基础研究发展计划资助项目(2010CB630806):国家自然科学基金(51404020)工程科学学报，第 37 卷，增刊 1: 35--44，2015 年 5 月 Chinese Journal of Engineering，Vol． 37，Suppl． 1: 35--44，May 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． s1． 007; http: / /journals． ustb． edu． cn 采用 ASPEX 扫描电镜研究钢中总氧和非金属夹杂物 的定量关系 于会香1，2) ，邵肖静3) ，张 静4) ，王新华1) 1) 北京科技大学冶金与生态工程学院，北京 100083 2) 北京科技大学钢铁冶金新技术国家重点实验室，北京 100083 3) 首钢技术研究院，北京 100041 4) 南京钢铁股份有限公司中厚板卷厂，南京 210035  通信作者，E-mail: yuhuixiang@ ustb． edu． cn 收稿日期: 2015--01--05 基金项目: 国家重点基础研究发展计划资助项目( 2010CB630806) ; 国家自然科学基金( 51404020) 摘 要 为了弄清钢中总氧( T． O) 和非金属夹杂物的量、尺寸之间的关系，本文选取四类钢种正常生产的铸坯，采用能进行 大面积试样检测的 ASPEX 自动扫描电镜系统研究了钢中的 T． O、夹杂物及两者之间的定量关系，并采用 Thermo-calc 热力学 软件进行了计算和验证． 结果表明: 夹杂物的主要组成与钢的生产工艺有很大关系． 随着夹杂物尺寸的增加，单位检测面积 上该尺寸范围的夹杂物数量显著减少． 与 T． O ＜ 0. 002% 的钢种相比，T． O 为 0. 01% 的钢中夹杂物的数量、面积均明显增加． 当 T． O ＜ 0. 002% 时，T． O 与夹杂物的面积表现出较好的对应关系． 相比于夹杂物的数量来说，T． O 更准确的表征夹杂物的面 积． 大型夹杂物的出现具有偶然性． 实验结果与热力学计算结果、钢中氧硫含量吻合很好． 关键词 钢洁净度; 总氧; 非金属夹杂物; ASPEX 自动扫描电镜; 热力学计算 分类号 TF769. 2 Study on the quantitative relationship between total oxygen content and non-metallic inclusion in steel with ASPEX SEM YU Hui-xiang1，2)  ，SHAO Xiao-jing 3) ，ZHANG Jing4) ，WANG Xin-hua1) 1) School of Metallurgical and Ecological Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) State Key Laboratory of Advanced Metallurgy，University of Science and Technology Beijing，Beijing 100083，China 3) Shougang Research Institute of Technology，Beijing 100041，China 4) Wide Plate and Coil Plant，Nanjing Iron and Steel Co． ，Ltd． ，Nanjing 210035，China  Corresponding author，E-mail: yuhuixiang@ ustb． edu． cn ABSTRACT The total oxygen content ( T． O) ，non-metallic inclusions and the relationship between them in pipeline steel，gear steel，tire cord steel and Q235 steel，which were taken from industrial products，were systematically investigated by ASPEX automatic scanning electron microscope ( SEM) ，which can scan large area metallographic specimen，and thermodynamic software Thermo-Calc was used to calculate and validate． The obtained results indicate that non-metallic inclusions are greatly influenced by the production process of steel． With the inclusion size increasing，the amount of inclusions in this size range decreases． Both quantity and area of in￾clusions increase sharply when T． O increases from less than 0. 002% to 0. 01% ． When T． O is lower than 0. 002% ，it only shows good positive relationship with the area of all inclusions per square mm steel samples． T． O indicates the area of inclusions in steel more accurately than the quantity of inclusions． Large sized inclusions appear accidentally． The experimental results agree very well with thermodynamic calculations and the content of T． O，［S］in steel． KEY WORDS steel cleanliness; total oxygen content; non-metallic inclusion; ASPEX scanning electron microscope; thermodynam￾ic calculation