High temperature oxidation behavior of 309SMOD austenitic heat-resistant stainless steel

doi:10.13251/j.issn.0254-6051.2021.11.004

Abstract

Abstract: Oxidation behavior of the 309SMOD austenitic stainless steel at different temperatures was analyzed by weight gain method. The parabolic oxidation kinetics curves of the steel at high temperatures were obtained. The morphology and phases of the oxides were analyzed by means of SEM, EDS and XRD. The results show that the slab and block oxide morphologies are observed at 800 ℃, while the oxides are mainly spinel particles at 900 ℃ and 1000 ℃. The mixed three-layer oxidation films are observed on the surface of the 309SMOD austenitic stainless steel, of which the outermost layer is consisted of MnCr₂O₄ and FeCr₂O₄, the sub outer layer is Cr₂O₃, and the innermost layer is SiO₂. The oxide film structure makes the 309SMOD austenitic stainless steel with good high temperature oxidation resistance.

Key words: 309SMOD austenitic stainless steel, high temperature oxidation, oxide film

CLC Number:

TB35

Meng Chongchong, Yang Xiaorong, Zhang Huayu, Zhang Wei, Chen Huiqin. High temperature oxidation behavior of 309SMOD austenitic heat-resistant stainless steel[J]. Heat Treatment of Metals, 2021, 46(11): 24-28.

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