| Super304H奥氏体不锈钢的高温抗氧化性能 |
| |
| 引用本文： | 李凌霄,赵艳君,张敬瑞,李平珍,韦凤,叶伯溪. Super304H奥氏体不锈钢的高温抗氧化性能[J]. 金属热处理, 2023, 48(1): 80-86. DOI: 10.13251/j.issn.0254-6051.2023.01.014 |
| |
| 作者姓名： | 李凌霄 赵艳君 张敬瑞 李平珍 韦凤 叶伯溪 |
| |
| 作者单位： | 1.广西大学 资源环境与材料学院, 广西 南宁 530004; 2.广西大学 广西有色金属及特色材料加工重点实验室, 广西 南宁 530004 |
| |
| 基金项目： | 国家自然科学基金(51661004);广西创新驱动项目(桂科AA18242003-3);广西有色金属及特色材料加工重点实验室项目(GXYSSF1809) |
| |
| 摘 要： | 对Super304H奥氏体不锈钢在550～800℃进行高温氧化试验，结合氧化动力学规律去研究Super304H奥氏体不锈钢的氧化机理。结果表明，Super304H奥氏体不锈钢在550～800℃氧化质量增加曲线遵循抛物线规律，在750～800℃时60 h以内氧化质量增加趋势最明显，100 h后质量增加高达0.005 mg·mm-2。在550～750℃逐渐生成致密的氧化膜，主要由Cr2O3和Fe3-xCrxNiO4混合氧化物和少量CuCrMnO4构成。升高温度会促进Cr的选择性氧化，使得Cr2O3保护膜开裂，800℃时暴露出的Fe基体与氧原子反应生成瘤状Fe3O4,氧化膜厚重并伴有剥落现象。应变速率为3.2×10-4 s-1时，不锈钢的抗拉强度随氧化温度升高而降低，600℃的抗拉强度最大，达350 MPa; ...
|
| 关 键 词： | Super304H奥氏体不锈钢 高温抗氧化 氧化膜 氧化机理 |
| 收稿时间： | 2022-08-02 |
High temperature oxidation resistance of Super304H austenitic stainless steel |
| |
| Li Lingxiao,Zhao Yanjun,Zhang Jingrui,Li Pingzhen,Feng Wei,Ye Boxi. High temperature oxidation resistance of Super304H austenitic stainless steel[J]. Heat Treatment of Metals, 2023, 48(1): 80-86. DOI: 10.13251/j.issn.0254-6051.2023.01.014 |
| |
| Authors: | Li Lingxiao Zhao Yanjun Zhang Jingrui Li Pingzhen Feng Wei Ye Boxi |
| |
| Affiliation: | 1. School of Resources, Environment and Materials, Guangxi University, Nanning Guangxi 530004, China; 2. Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Guangxi University, Nanning Guangxi 530004, China |
| |
| Abstract: | Oxidation mechanism of Super304H austenitic stainless steel was studied by high temperature oxidation test at 550-800 ℃ and combining with the law of oxidation kinetics. The results show that the oxidation mass gain curve of the Super304H austenitic stainless steel follows the parabola law at 550-800 ℃, the trend of mass gain is the most obvious within 60 h at 750-800 ℃, and the mass gain is up to 0.005 mg·mm-2 after 100 h. A dense oxide film is gadually formed at 550-750 ℃, which is mainly composed of Cr2O3 and Fe3-xCrxNiO4 mixed oxides and a small amount of CuCrMnO4. Increasing temperature makes the Super304H austenitic stainless steel promote the selective oxidation of Cr, and make the Cr2O3 protective film crack. At 800 ℃, the exposed Fe matrix reacts with oxygen atoms to form tumor Fe3O4, and the oxide film is thick and peels off. when strain rate is 3.2×10-4 s-1, the tensile strength of the stainless steel decreases with the increase of oxidation temperature, and reaches 350 MPa as the maximum at 600 ℃. The elongation is the best at 700-750 ℃, which is 28%. |
| |
| Keywords: | Super304H austenitic stainless steel high temperature oxidation resistance oxide film oxidation mechanism |
|
| 点击此处可从《金属热处理》浏览原始摘要信息 |
|
点击此处可从《金属热处理》下载免费的PDF全文 |
|
