GL-A32和B610E板坯再热温度下的氧化行为
High-temperature Oxidation Behaviors of GL-A32 and B610E Heavy Plates at Reheating Temperatures
摘 要
为了解宽厚板板坯再热温度下的高温氧化行为, 采用热重分析法(TGA)研究了GL-A32和B610E两种典型热轧厚板在再热温度下(1100~1200 ℃空气中氧化90 min)的氧化增重动力学行为, 并采用扫描电镜(SEM)和X射线衍射仪(XRD)观察和分析了氧化皮的形貌与相组成。结果表明,随着温度的升高, 钢铁氧化增重加剧, 氧化动力学过程包含初始快速氧化和稳态氧化两个阶段;外层氧化皮主要由Fe2O3、Fe3O4和FeO组成, 其组成随氧化温度的不同变化明显。在1100 ℃和1150 ℃, 氧化皮呈灰黑色, 伴有大面积鼓泡和局部凹凸, 且较薄,容易剥离; 而在1200 ℃下, 氧化皮较厚且呈亮灰色, 硬度很大。
再热温度
氧化行为
氧化皮状态
heavy plate
reheating temperature
oxidation behavior
oxide scale state
Abstract
In order to understand the high-temperature oxidation behaviors of heavy plate steels in the reheating process, the oxidation kinetics of two typical hot-rolled heavy plate products GL-A32 and B610E in the air at temperatures of 1100 ~ 1200 ℃ was measured by the thermo-gravimetric analysis method (TGA). The morphology and composition of the oxide scales were characterized by scanning electron microscopy (SEM) and X-ray diffration (XRD). The results showed that the oxidation weight-gain of the steels increased dramatically with increasing the temperature. The oxidation process could be divided into two stages, i. e., the initial rapid transient oxidation stage and the steady oxidation stage. The outer part of oxide scales was mainly composed of Fe2O3, Fe3O4 and FeO, but the composition of each phase changed significantly with oxidation temperature. The oxide scales formed at 1100 ℃ and 1150 ℃ were grey-black, with blistering in large areas, thin and easy to remove. The oxide scale formed at 1200 ℃, however, was light-grey and had high hardness.
中图分类号 TG172.8
所属栏目 试验研究
基金项目
收稿日期 2010/4/1
修改稿日期 2010/4/17
网络出版日期
作者单位点击查看
备注张健平,硕士研究生,
引用该论文: ZHANG Jian-ping,QIAN Yu-hai,QI Hui-bin,MI Xiao-chuan,LI Ming. High-temperature Oxidation Behaviors of GL-A32 and B610E Heavy Plates at Reheating Temperatures[J]. Corrosion & Protection, 2011, 32(2): 99
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参考文献
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【2】Sun W H,Tieu A K,Jiang Z Y,et al. High temperature oxide scale characteristics of low carbon steel in hot rolling[J]. Journal of Materials Processing Technology,2004,155/156:1307-1312.
【3】李美栓. 金属的高温腐蚀[M]. 北京:冶金工业出版社, 2001.
【4】Chen R Y,Yuen W Y D. Oxidation of low-carbon,low-silicon mild steel at 450~900 ℃ under conditions relevant to hot-strip processing[J]. Oxidation of Metals,2002,57(1/2):53-79.
【5】Chen R Y,Yuen W Y D. Oxide-scale structures formed on commercial hot-rolled steel strip and their formation mechanism[J]. Oxidation of Metals,2001,56(1):89-115.
【6】Chen R Y,Yuen W Y D. Review of the high-temperature oxidation of iron and carbon steels in air or oxygen[J]. Oxidation of Metals,2003,59(5/6):433-468.
【7】宋璐璐, 齐慧滨, 吴毅雄, 等. SS400热轧碳钢氧化皮的结构改变与保护性[J]. 腐蚀与防护, 2009,30(12):903-908.
【8】Qi H B,Qian Y H,Wang W,et al. “Quartus Scale” of hot-rolled strip steels and its formation mechanism[J]. Baosteel Technical Research,2007,1(1):42-54.
【9】Chen R Y,Yuen W Y D. Improvement of pickling characteristics of hot-rolled strip through heat treatment of the oxide scale[C]//44th Mechanical Working and Steel Processing Conference and the 8th International Rolling Conference and International Symposium on Zinc-Coated Steels.Orlando USA.2002:1057-1066.
【10】Sheasby J S,Boggs W E,Turkdogan E T. Scale growth on steels at 1200 ℃:rationale of rate and morphology[J]. Met.Sci.,1984,18(3):127-136.
【11】Suarez L,Houbaert Y,Eynde X V,et al. High temperature deformation of oxide scale[J]. Corrosion Science,2009,51(2):309-315.
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