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工程科学与技术:2020,52(2):200-206
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高温超低碳IF钢在轧制过程中的氧化实验研究
(1.北京科技大学 能源与环境工程学院, 北京 100083;2.冶金工业节能减排北京市重点实验室, 北京 100083)
Experimental Research on Oxidation of Ultra-low Carbon Interstitial-free Steel at High Temperatures in Rolling
(1.School of Energy and Environmental Eng., Univ. of Sci. and Technol. Beijing, Beijing 100083, China;2.Beijing Key Lab. of Energy Conservation and Emission Reduction for Metallurgical Industry, Beijing 100083, China)
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投稿时间:2019-04-15    修订日期:2019-10-28
中文摘要: 在实际生产过程中,由于生成的氧化铁皮未能彻底清除,超低碳IF钢表面极易存在“丝斑缺陷”,严重影响了其表面性能。作者通过热重实验对超低碳IF钢在轧制过程中空气气氛下的氧化特性进行了实验研究,研究结果表明:超低碳IF钢的氧化程度与温度呈指数关系,且IF钢的氧化反应对温度的敏感性很高。在实验中,超低碳IF钢在炉温868、977、1 087和1 200 ℃,钢温868.4、976.9、1 087.4、1 199.5 ℃下,单位面积氧化增重分别为24.46、108、220和355 mg/cm2。通过对4种不同温度下氧化层的形貌和成分进行分析,发现钢温为868.4 ℃下氧化层表现出参差不齐的内外表面,界面处粗糙,且氧化层内部无孔隙。钢温为976.9 ℃时氧化层内部出现孔隙,氧化层与钢基体结合较紧密。钢温为1 087.4 ℃时氧化层表面平整,氧化层内部未出现孔隙,但钢基体表面出现明显氧化情况。钢温为1 199.5 ℃时氧化层内外表面平整,氧化层致密,内部未出现孔隙。氧化层的成分主要为FeO,Fe2O3和Fe3O4较小。
中文关键词: 超低碳IF钢  氧化增重  形貌分析
Abstract:Pin point spots defects appear easily on the surface of Interstitial-free steel during the manufacturing process and badly influence the surface quality. This paper exploited thermal-gravity experiments to investigate the experimental research on the oxidation mechanism of IF steel in air. Results showed that the oxidation degree of IF steel increases with reacting temperature with exponential relationship; and oxidation of IF steel is more sensitive to temperature. In experiments, weight gains per unit area of IF steel were 24.46, 108, 220 and 355 mg/cm2 at furnace temperature 868, 977, 1 087 and 1 200 ℃, steel temperature 868.4, 976.9, 1 087.4, 1 199.5 ℃. By analyzing the morphology and composition of the oxide layer at four different temperatures, it was found that the oxide layer exhibites a jagged inner and outer surface at a temperature of 868.4 ℃, the interface is rough, and there is no void inside the oxide layer. When the steel temperature is 976.9 ℃, pores appear inside the oxide layer, and the oxide layer is tightly bonded to the steel matrix. When the steel temperature is 1 087.4 ℃, the inner and outer surfaces of the oxide layer are flat, and no pores appear inside the oxide layer, but the surface of the steel substrate shows obvious oxidation. The inner and outer surfaces of the oxide layer formed at a steel temperature of 1 199.5 ℃ are flat, the oxide layer is dense, and no pores appear inside. The composition of the oxide layer is mainly FeO, and Fe2O3 and Fe3O4 are little.
文章编号:201801389     中图分类号:TG172    文献标志码:
基金项目:国家重点研发计划项目(2018YFB0605900);国家自然科学基金项目(51706017)
作者简介:苏福永(1982-),男,副教授.研究方向:金属加热过程质量控制.E-mail:sfyong@ustb.edu.cn
引用文本:
苏福永,宋锐,温治.高温超低碳IF钢在轧制过程中的氧化实验研究[J].工程科学与技术,2020,52(2):200-206.
SU Fuyong,SONG Rui,WEN Zhi.Experimental Research on Oxidation of Ultra-low Carbon Interstitial-free Steel at High Temperatures in Rolling[J].Advanced Engineering Sciences,2020,52(2):200-206.
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