1.太原理工大学材料科学与工程学院, 太原 030024
2.山西省金属材料腐蚀与防护工程技术研究中心, 太原 030024
曹小强(1996―),男,硕士;E-mail:948264432@qq.com
侯利锋(1978―),女,博士,教授;E-mail:houlifeng@126.com
收稿:2023-05-26,
纸质出版:2024-03-30
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曹小强,贾建文,岳习文等.S44535铁素体不锈钢高温氧化行为[J].特殊钢,2024,45(02):66-73.
Cao Xiaoqiang,Jia Jianwen,Yue Xiwen,et al.High Temperature Oxidation Behavior of S44535 Ferritic Stainless Steel[J].Special Steel,2024,45(02):66-73.
曹小强,贾建文,岳习文等.S44535铁素体不锈钢高温氧化行为[J].特殊钢,2024,45(02):66-73. DOI: 10.20057/j.1003-8620.2023-00094.
Cao Xiaoqiang,Jia Jianwen,Yue Xiwen,et al.High Temperature Oxidation Behavior of S44535 Ferritic Stainless Steel[J].Special Steel,2024,45(02):66-73. DOI: 10.20057/j.1003-8620.2023-00094.
为了探究稀土La对S44535铁素体不锈钢高温氧化行为的影响,采用加速氧化对添加0.26% La的S44535钢在800、900、1 000 ℃下的静态空气中进行高温氧化研究。采用恒温氧化法对比S44535铁素体不锈钢在三种温度下的氧化动力学曲线,用扫描电镜(SEM)、能谱分析仪(EDS)和X射线衍射(XRD)对钢的氧化层进行表征分析,探究了稀土La对铁素体不锈钢高温抗氧化性能的影响。结果表明,氧化产物主要为Cr
2
O
3
和MnCr
2
O
4
,随着温度的升高,表面氧化膜增厚且更加致密,其外层富含Mn,内层富含Cr,说明稀土改变了氧化膜的生长方式,且呈现出较为优异的高温抗氧化性能。
In order to explore the effect of rare earth La on the high-temperature oxidation behavior of S44535 ferritic stainless steel, accelerated oxidation was used to study the high-temperature oxidation of S44535 steel added with 0.26 wt.% La in static air at 800°C, 900 ℃and 1 000 ℃. In this paper, the oxidation kinetic curves of S44535 ferritic stainless steel at three temperatures were compared by constant temperature oxidation method, and the oxide layer of steel was characterized by scanning electron microscopy (SEM), energy spectroscopy analyzer (EDS) and X-ray diffraction (XRD), and the effect of rare earth La on the high-temperature oxidation resistance of ferritic stainless steel was explored. The results showed that the oxidation products were mainly Cr
2
O
3
and MnCr
2
O
4
, and with the increase of temperature, the surface oxide film thickened and became denser, and its outer layer was rich in Mn, and the inner layer was rich in Cr, indicating that rare earths changed the growth direction of the oxide film, and showed excellent high temperature oxidation resistance performance.
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