FeCrAl铁素体不锈钢高温氧化行为  

High temperature oxidation behavior of FeCrAl ferritic stainless steel

作　　者：邱国兴 李嘉宁 李琦 白冲 杨永坤 李小明[1] QIU Guoxing;LI Jianing;LI Qi;BAI Chong;YANG Yongkun;LI Xiaoming(School of Metallurgical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,Shaanxi,China)

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055

出　　处：《金属功能材料》2024年第5期101-109,共9页Metallic Functional Materials

基　　金：中国博士后科学基金资助项目(2022M720982)。

摘　　要：通过等温氧化试验,在大气环境下,对两种铁素体耐热不锈钢(C1不含Zr,C2含Zr)在1000、1050和1100℃下的100 h高温氧化行为进行研究。利用X射线衍射仪、扫描电子显微镜和能谱仪对两组不锈钢氧化层表面、截面形貌和物相组成进行观察分析。试验结果表明,两种合金的高温氧化动力学曲线均遵循抛物线规律。与C1合金相比,C2合金在各温度氧化时,均表现出较低的增重率。Zr的加入没有改变氧化膜的构成,两组合金氧化膜均由内层的Cr_(2)O_(3)和表层富含Fe-Cr-Al-O的尖晶石氧化物组成。C1合金在不同温度氧化过程中均出现了氧化膜脱落,其中在1100℃下尤为显著;C2合金表面氧化膜致密且连续,表现出良好的抗高温氧化性能。在合金中添加Zr可以增强氧化层和基体附着力,从而提高FeCrAl合金抗高温氧化性能。The high-temperature oxidation behavior of two ferritic heat-resistant stainless steels(C1without Zr and C2with Zr)was studied through isothermal oxidation tests in an atmospheric environment at 1000,1050,and 1100℃for 100h.The surface,cross-sectional morphology,and phase composition of the oxidation layers of both steels were analyzed using X-ray diffraction,scanning electron microscopy,and energy dispersive spectroscopy.The experimental results indicate that the high-temperature oxidation kinetics curves of both alloys follow a parabolic law.Compared to the C1alloy,the C2alloy exhibited lower weight gain rates at all tested temperatures.The addition of Zr did not alter the composition of the oxide film;both alloys formed oxide layers consisting of an inner Cr_(2)O_(3)layer and an outer spinel oxide layer rich in Fe-Cr-Al-O.The C1alloy experienced oxide film spallation at various temperatures,with the most significant spallation observed at 1100℃.In contrast,the oxide film on the C2 alloy was dense and continuous,demonstrating excellent high-temperature oxidation resistance.The incorporation of Zr in the alloy enhances the adhesion between the oxide layer and the substrate,thereby improving the high-temperature oxidation resistance of FeCrAl alloys.

关 键 词：铁素体不锈钢 ZR 高温氧化 氧化动力学 氧化膜 

分 类 号：TG142.71[一般工业技术—材料科学与工程]