奥氏体不锈钢Cr18Ni3Mn11Cu3NbN高温抗氧化性能High-temperature oxidation behavior of austenitic stainless steel Cr18Ni3Mn11Cu3Nb
李冬升,戴起勋,程晓农,陈祖伟,高佩,刘瑜
摘要(Abstract):
采用称重法测得了奥氏体不锈钢Cr18Ni3Mn11Cu3NbN在不同温度下的高温氧化动力学曲线,结果表明,该钢在700℃和800℃的氧化曲线遵循抛物线氧化规律,根据平均氧化速度的评级标准,在此温度下钢"完全抗氧化"。利用扫描电镜、X射线衍射的方法对氧化膜表面的形貌及结构进行了研究,发现该钢700℃氧化膜致密完整,主要由Mn2O3、MnFe2O4(尖晶石结构)和Cr的氧化物组成;800℃氧化膜出现脱落,主要由Mn2 O3、MnFe2 O4(尖晶石结构)、Cr的氧化物和Fe的氧化物组成;900℃氧化膜脱落严重,主要由Mn2O3、Fe2O3、尖晶石结构的MnFe2O4组成。
关键词(KeyWords): 奥氏体不锈钢;高温氧化;氧化膜;循环氧化
基金项目(Foundation): 江苏省科技成果转化项目(BA2007033);; 江苏省研究生培养创新工程项目(CX09B_194Z)
作者(Author): 李冬升,戴起勋,程晓农,陈祖伟,高佩,刘瑜
DOI: 10.13289/j.issn.1009-6264.2011.08.027
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