| 非等温氧化工艺下含Si低碳钢氧化行为的实验研究 |
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| 作者姓名： | 梁伟成 徐光 袁清 何贝 |
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| 作者单位： | 1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉,430081;2.武汉科技大学国际钢铁研究院,湖北 武汉,430081,1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉,430081;2.武汉科技大学国际钢铁研究院,湖北 武汉,430081,1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉,430081;2.武汉科技大学国际钢铁研究院,湖北 武汉,430081,1. 武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室,湖北 武汉,430081;2.武汉科技大学国际钢铁研究院,湖北 武汉,430081 |
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| 基金项目： | 国家自然科学基金面上项目(51274154)；湖北省科技创新专项重大项目(2017000011). |
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| 摘 要： | 模拟工业生产现场板坯在加热炉中的分段式加热制度和氧化气氛,在同步热分析仪(TGA)中进行氧化实验,研究氧化温度对硅的质量分数分别为1.21%和0.25%的两种低碳钢试样(HS1.21和LS0.25)氧化行为的影响。同时,用场发射扫描电镜(SEM)观察氧化后试样氧化铁皮及Fe_2SiO_4的微观形貌,用Image-pro Plus 6.0测量不同硅含量钢种在不同氧化温度下氧化后试样的Fe_2SiO_4渗透深度,用能谱仪(EDS)分析其氧化铁皮的结构组成。结果表明,温度达到剧烈氧化温度后,两种试样中硅含量低的低碳钢氧化增重随时间呈抛物线变化,而硅含量较高的低碳钢氧化增重随时间呈直线性变化;氧化一定时间后,硅含量不同的两种试样的氧化增重曲线相交,出现临界时间点,在该临界时间点之前,LS0.25低碳钢的氧化增重较多,而临界时间点之后,HS1.21低碳钢氧化增重较多,且临界时间点随着氧化温度的升高逐渐推迟。
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| 关 键 词： | 低碳钢 硅含量 非等温氧化 氧化铁皮 硅酸亚铁 氧化行为 |
| 收稿时间： | 2017/5/5 0:00:00 |
An experimental study on oxidation behavior in low carbon steel containing Si under non-isothermal oxidizing process |
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| Authors: | Liang Weicheng Xu Guang Yuan Qing and He Bei |
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| Institution: | 1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China,1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China,1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China and 1. Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China;2. International Research Institute for Steel Technology, Wuhan University of Science and Technology, Wuhan 430081, China |
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| Abstract: | The influence of oxidation temperature on oxidation mass gain of low carbon steel was investigated by stimulating segmented heating route and oxidation atmosphere similar to that used in an industrial reheating furnace, using thermal gravimetric analyzer (TGA). Meanwhile, the morphology of Fe2SiO4 was observed by scanning electron microscope (SEM). The penetration depth of the Fe2SiO4 layer under different oxidation temperatures was determined by the Image-Pro Plus 6.0 software and the structure of oxide scale was analyzed by energy disperse spectroscopy. The results show that the mass gain versus time follows an almost linear relationship in HS1.21 steel, whereas it is a near parabolic relationship in LS0.25 steel after the intense oxidation temperature. After a certain holding time, the curves of mass gain in LS0.25 steel and HS1.21 steel will intersect, and the critical time point appears corresponding to the intersection point. The mass gain of low-silicon steel is larger before and smaller after the critical time point than that of high-silicon steel. The critical point gradually postpones with the increase of oxidation temperature. |
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| Keywords: | low carbon steel Si content non-isothermal oxidation oxide scale Fe2SiO4 oxidation behavior |
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