<strong>F55</strong>双相不锈钢在<strong>800~1000℃</strong>纯氧气中的高温氧化行为

doi:10.11902/1005.4537.2023.326

中国腐蚀与防护学报

2024, Vol. 44

Issue (5): 1332-1338 CSTR: 32134.14.1005.4537.2023.326 DOI: 10.11902/1005.4537.2023.326

研究报告

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F55双相不锈钢在800~1000℃纯氧气中的高温氧化行为

吴铭¹, 任延杰¹^,²(

), 马灼春¹, 张思甜¹, 陈荐¹, 牛焱¹(

)

1 长沙理工大学能源与动力工程学院长沙 410076
2 浙江科技大学机械与能源工程学院杭州 310023

High Temperature Oxidation Behavior of F55 Super Duplex Stainless Steel at 800-1000^oC in 1.013×10⁵ Pa O₂

WU Ming¹, REN Yanjie¹^,²(

), MA Zhuochun¹, ZHANG Sitian¹, CHEN Jian¹, NIU Yan¹(

)

1 Department of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410076, China
2 School of Mechanical & Energy Engineering, Zhejiang University of Science & Technology, Hangzhou 310023, China

引用本文:

吴铭, 任延杰, 马灼春, 张思甜, 陈荐, 牛焱. F55双相不锈钢在800~1000℃纯氧气中的高温氧化行为[J]. 中国腐蚀与防护学报, 2024, 44(5): 1332-1338.
Ming WU, Yanjie REN, Zhuochun MA, Sitian ZHANG, Jian CHEN, Yan NIU. High Temperature Oxidation Behavior of F55 Super Duplex Stainless Steel at 800-1000^oC in 1.013×10⁵ Pa O₂[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(5): 1332-1338.

全文: PDF(13960 KB) HTML

摘要:

研究了F55双相不锈钢在800、900、1000℃下1.013 × 10⁵ Pa纯氧中的氧化行为。采用光学显微镜、扫描电镜(SEM)、X射线衍射(XRD)等方法分析了合金中氧化膜结构和相组成。结果表明：在不同实验温度下氧化膜主要由Cr₂O₃和Cr、Mn氧化物组成。氧化动力学曲线均遵循抛物线规律，合金的氧化增重随着温度的升高而增大。合金近表层的α相中的Cr易于向外扩散发生氧化，α相转变为γ相。在氧化过程中，合金内部的α相发生共析生成σ + γ相，σ相中的Cr优先扩散至合金表面发生氧化反应。

关键词 ： F55双相不锈钢, 高温氧化, 相变, 共析反应

Abstract：

The oxidation behavior of F55 duplex stainless steel in 1.013 × 10⁵ Pa pure oxygen at 800, 900, 1000℃ has been studied by means of thermal gravimetric analyzer, optical microscope, scanning electron microscope (SEM) and X-ray diffraction (XRD). The results show that the oxide scales are mainly composed of Cr₂O₃ and Cr-Mn oxides at the designed temperatures. The oxidation kinetics curves follow parabolic law, and the oxidation mass gain increases with the increase of temperature. During the oxidation process, the α phase on the surface of the alloy changes into γ phase due to the outward diffusion of Cr, while the α phase in the matrix undergoes eutectoid reaction to form σ + γ and other phases. Cr in the σ phase generated by the eutectoid reaction preferentially diffuses to the surface of the alloy to participate in the oxidation reaction.

Key words： F55 duplex stainless steel high temperature oxidation phase change eutectoid reaction

收稿日期: 2023-10-18 32134.14.1005.4537.2023.326

ZTFLH:

TG174

基金资助:湖南省科技厅项目(21A0204)

通讯作者: 任延杰，E-mail：yjren@csust.edu.cn，研究方向为动力设备的腐蚀与防护牛焱，E-mail：yniu@csust.edu.cn，研究方向为金属的高温腐蚀与防护

Corresponding author: REN Yanjie, E-mail: yjren@csust.edu.cnNIU Yan, E-mail: yniu@csust.edu.cn

作者简介: 吴铭，男，1999年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2023.326 或 https://www.jcscp.org/CN/Y2024/V44/I5/1332

图1 F55双相钢光学显微镜及扫描电镜金相照片以及XRD谱

图2 F55双相钢在不同温度下1.013×105 Pa O2中氧化50 h的动力学曲线

表1 F55双相钢在800、900和1000℃下1.013×105 Pa O2中氧化50 h的不同阶段持续时间以及抛物线速率常数

图3 F55双相钢在1.013×105 Pa O2中不同温度下氧化50 h后的截面形貌

表2 Cr原子在α-Fe和γ-Fe中的扩散系数计算值

图4 F55双相钢原始态及其在800、900和1000℃氧化50 h后的微观组织

表3 轧制的F55双相钢及其在800、900和1000℃氧化50 h后各相主要元素组成 (mass fraction / %)

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