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含铜17Cr铁素体不锈钢的高温氧化行为

High-Temperature Oxidation Behavior of a Cu-Bearing 17Cr Ferritic Stainless Steel.

作者信息

Zhang Mengqi, Han Ying, Zu Guoqing, Sun Jiapeng, Zhu Weiwei, Chen Hua, Ran Xu

机构信息

Key Laboratory of Advanced Structural Materials, Ministry of Education, Changchun University of Technology, Changchun 130012, China.

College of Mechanics and Materials, Hohai University, Nanjing 211100, China.

出版信息

Scanning. 2020 Dec 16;2020:8847831. doi: 10.1155/2020/8847831. eCollection 2020.

DOI:10.1155/2020/8847831
PMID:33381256
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7758150/
Abstract

The isothermal oxidation behavior of 17Cr-0.85Si-0.5Nb-1.2Cu ferritic stainless steel in air was studied from 850°C to 1050°C by analyzing its weight gain after oxidation. The kinetic curves were plotted using the oxidation weight-gain data, and the structure, surface morphology, and element distribution of the oxide films were analyzed by XRD, SEM, and EDS. The results showed that the oxidation kinetics curves at 850°C and 950°C followed a parabolic law, and a continuous and dense oxide film composed of CrO and MnCrO, FeCrO, and Cu-Cr rich spinel was formed, which reveals that the steel displayed good oxidation resistance. When the temperature was increased to 1050°C, the oxidation kinetics curves gradually changed from parabolic to linear after 40 h exposure, which indicated that the oxidation resistance significantly worsened. A lower oxidation resistance was observed at 1050°C due to the formation of a large amount of FeO on the surface and the volatilization of the inner CrO layer.

摘要

通过分析17Cr-0.85Si-0.5Nb-1.2Cu铁素体不锈钢在氧化后的增重情况，研究了其在850°C至1050°C空气中的等温氧化行为。利用氧化增重数据绘制了动力学曲线，并通过XRD、SEM和EDS分析了氧化膜的结构、表面形貌和元素分布。结果表明，850°C和950°C下的氧化动力学曲线遵循抛物线规律，形成了由CrO和MnCrO、FeCrO以及富Cu-Cr尖晶石组成的连续致密氧化膜，这表明该钢具有良好的抗氧化性。当温度升至1050°C时，暴露40小时后氧化动力学曲线逐渐从抛物线型转变为线性，这表明抗氧化性显著变差。在1050°C时观察到较低的抗氧化性，这是由于表面形成了大量的FeO以及内层CrO层的挥发所致。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/260c71a45194/SCANNING2020-8847831.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/6a07c1905c0c/SCANNING2020-8847831.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/c262fc5c439a/SCANNING2020-8847831.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/bb36cf6a3e4e/SCANNING2020-8847831.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/07061d330794/SCANNING2020-8847831.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/f1498ee21dc7/SCANNING2020-8847831.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/e4b49da90941/SCANNING2020-8847831.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/260c71a45194/SCANNING2020-8847831.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/6a07c1905c0c/SCANNING2020-8847831.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/c262fc5c439a/SCANNING2020-8847831.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/bb36cf6a3e4e/SCANNING2020-8847831.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/07061d330794/SCANNING2020-8847831.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/f1498ee21dc7/SCANNING2020-8847831.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/e4b49da90941/SCANNING2020-8847831.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8991/7758150/260c71a45194/SCANNING2020-8847831.007.jpg

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