Analysis on Oxidation Behavior of HR3C Steel at 700°C in Water Vapor
1. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
2. College of Machinery and Automation, Zhixing College of Hubei University, Wuhan 430011, China
| Abstract: | HR3C is an advanced heat-resistant alloy, and its high-temperature oxidation resistance directly determines the service performance of the material. Therefore, exploring the high-temperature oxidation behavior of HR3C is of great significance for the theoretical research and practical application of the material. The oxidation kinetic curve, oxide film morphology, oxide film composition, and oxide film phase composition of HR3C samples in the supply state after being oxidized in water vapor at 700°C for 50h, 150h, 250h, 350h, 450h, 550h and 600h were analyzed by SEM (Scanning Electron Microscopy), EDS (Energy Dispersive Spectroscopy) and XRD (X-ray diffraction). The results show that the oxidation kinetic curve of the material conforms to the parabolic law, the oxide film first forms a lamellar oxide, and the lamellar oxide film grows alternately to form a loose and porous oxide film surface, the oxide is composed of three oxides: Fe3O4, FeCr2O4 and Fe2O3. The FeCr2O4 is a spinel compound, which can form a dense oxide film, and the diffusion coefficient of metal ions in it is small, which hinders the diffusion and mass transfer of ions, thereby improving the high temperature oxidation resistance of stainless steel. The element Cr is mainly enriched in the inner oxide layer, and the element Fe is relatively high in the outer oxide layer. |
| Keywords: | HR3C Steel; High Temperature Oxidation; Water Vapor; Oxide Film |
| DOI: | 10.57237/j.mater.2022.01.005 |
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Received: 8 October 2022
Accepted: 7 November 2022
Published Online: 23 November 2022
Funding
| 1. | National Natural Science Foundation of China (51071113) |
| 2. | Scientific Research Project of Hubei Provincial Department of Education (B2021409) |
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