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材料研究学报  2024, Vol. 38 Issue (10): 732-740    DOI: 10.11901/1005.3093.2023.557
  研究论文 本期目录 | 过刊浏览 |
Cr含量对Ni-Fe-Cr-Al合金抗氧化性能的影响
张凯1, 付广艳1(), 刘恩泽2, 谭政2, 宁礼奎2, 郑志2
1.沈阳化工大学机械与动力工程学院 沈阳 110142
2.中国科学院金属研究所 沈阳 110016
Effect of Cr Content on Oxidation Resistance of Ni-Fe-Cr-Al Alloy
ZHANG Kai1, FU Guangyan1(), LIU Enze2, TAN Zheng2, NING Likui2, ZHENG Zhi2
1.School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
2.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
引用本文:

张凯, 付广艳, 刘恩泽, 谭政, 宁礼奎, 郑志. Cr含量对Ni-Fe-Cr-Al合金抗氧化性能的影响[J]. 材料研究学报, 2024, 38(10): 732-740.
Kai ZHANG, Guangyan FU, Enze LIU, Zheng TAN, Likui NING, Zhi ZHENG. Effect of Cr Content on Oxidation Resistance of Ni-Fe-Cr-Al Alloy[J]. Chinese Journal of Materials Research, 2024, 38(10): 732-740.

全文: PDF(15439 KB)   HTML
摘要: 

用不连续称重法表征了Cr含量(质量分数)分别为20%、24%和28%的Ni-Fe-Cr-Al合金在1200℃空气中氧化后氧化膜的形貌和相组成,研究了这类合金的氧化行为。结果表明:这三种不同Cr含量的Ni-Fe-Cr-Al合金在1200℃氧化100 h后其氧化动力学曲线都符合抛物线规律,氧化速率相近,Cr含量的提高使其抗氧化性能有所提高。这三种Ni-Fe-Cr-Al合金在1200℃氧化1 h后生成的氧化膜均具有两层结构,外层由Cr2O3和少量尖晶石氧化物NiCr2O4组成,内层为Al2O3层;氧化100 h后氧化膜仍为两层结构,与氧化1 h的不同之处是外层主要由混合尖晶石和少量Cr2O3组成,混合尖晶石为NiCr2O4、NiFe2O4,内层为连续Al2O3层。这三种合金在氧化过程中均出现明显的内氮化。Cr含量的提高对氧化1 h发生的内氮化有一定的抑制。随着氧化时间的延长(100 h)这三种合金的内氮化深度相近,提高Cr含量对内氮化影响不大。

关键词 金属材料Ni-Fe-Cr-Al合金氧化动力学内氮化Cr含量    
Abstract

The oxidation behavior of Ni-Fe-Cr-Al alloys with Cr content of 20%Cr, 24%Cr and 28%Cr (mass percentage) respectively at 1200oC in air for 100 h were studied by intermittent weighing method. The microstructure and phase composition of the alloys and oxide scales were also characterized. The results show that the oxidation kinetics curves of the three alloys all conform to the parabolic law. The oxidation resistance of the alloys is enhanced with the increasing Cr content. A two-layered oxide scale is formed on the surface of the three alloys after oxidation at 1200oC for 1 h, i.e. the outer layer was composed of Cr2O3 and a small amount of spinel oxide NiCr2O4, and the inner layer was Al2O3 layer. After 100 h oxidation, the oxide scale still has a two-layered structure, which is slightly different from those of the 1 h oxidation, namely, the outer layer is mainly composed of mixed spinel and a small amount of Cr2O3, the mixed spinel is NiCr2O4 and NiFe2O4, and the inner one is continuous Al2O3 layer. The three Ni-Fe-Cr-Al alloys with different Cr content showed obvious internal nitriding during air oxidation. When oxidized for 1 h, the increase of Cr content presents a certain inhibitory effect on internal nitriding. With the extension of oxidation time (100 h), the nitriding depth of the three alloys is similar, and the increase of Cr content has little effect on the internal nitriding.

Key wordsmetallic materials    Ni-Fe-Cr-Al alloy    oxidation kinetics    internal nitriding    Cr content
收稿日期: 2023-11-22     
ZTFLH:  TG132.3+3  
基金资助:国家重点研发计划(2021YFC2202402)
通讯作者: 付广艳,教授,Fu_guangyan@126.com,研究方向为金属材料及腐蚀与防护技术
Corresponding author: FU Guangyan, Tel: 13504997591, E-mail: Fu_guangyan@126.com
作者简介: 张 凯,男,1998年生,硕士生
AlloyNiCrAlFe
20%Cr40~43204.1~4.5Bal.
24%Cr24Bal.
28%Cr28Bal.
表1  实验用合金的名义成分
图1  三种Ni-Fe-Cr-Al合金在1200℃氧化100 h的氧化动力学曲线
AlloyKp / mg2·cm-4·h-1
20%Cr1.148
24%Cr1.044
28%Cr0.953
表2  三种合金的氧化抛物线速率常数Kp
图2  三种Ni-Fe-Cr-Al合金在1200℃氧化后单位面积增重的平方随时间的变化
图3  三种合金在1200℃氧化1 h和100 h后表面氧化产物的XRD谱
图4  三种合金在1200℃氧化不同时间后的表面形貌
PointOAlCrFeNi
157.213.7137.341.090.65
222.211.4664.977.074.29
363.371.4114.2411.599.38
463.981.3331.272.790.64
554.470.2741.772.191.31
648.617.2717.8514.6511.62
表3  20%Cr合金氧化后表面不同位置的EDS分析
图5  三种合金在1200℃氧化不同时间后的横截面形貌
图6  20%Cr合金在1200℃氧化不同时间后的横截面EDS面扫结果
PointOAlCrFeNiN
160.581.2728.845.024.280.00
25.751.6711.2539.5941.220.53
360.8238.250.190.360.380.00
40.6151.050.130.190.1947.83
50.8850.331.562.131.8443.25
655.838.4711.6411.9912.060.00
755.1216.0513.642.3112.880.00
857.6841.660.360.130.160.00
表4  三种合金在1200℃氧化1 h和100 h后的横截面不同位置的EDS分析
图7  合金在1200℃氧化不同时间后AlN的分布
图8  三种合金在1200℃氧化1 h和100 h后内氮化深度
图9  Ni-Fe-Cr-Al合金在1200℃氧化过程的示意图
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