Abstract：The oxidation kinetics of 00Cr25Ni22Mo2N austenitic stainless steel at different temperatures was studied by thermal gravity analysis (TGA) method. The results showed that the linear isothermal oxidation kinetic curve at 700 ℃ paralleled to the time axis， indicating that the oxidation hardly occurred. While， the oxidation kinetic curves followed a parabolic rate law at 800 and 900 ℃， suggesting that the 00Cr25Ni22Mo2N stainless steel possessed superior high temperature oxidation resistance. The surface and cross section morphologies and the phase composition of the oxide film on the steel at different temperatures were examined by SEM， EDS， and XRD. The results showed that sticking and compact oxide films were formed on the surface of 00Cr25Ni22Mo2N stainless steel. The oxide film was thin and composed of Cr2O3 and Fe2O3 at 700 ℃. While a thicker oxide film was formed at 800 ℃， which consisted of Cr2O3， Fe2O3 and small amount of NiCr2O4， FeCr2O4. As the temperature increased to 900 ℃， the oxide film also consisted of Cr2O3， Fe2O3 and NiCr2O4， and the thickness of the oxide film was further increased. It is suggested that the composition and structure of the oxide film contributed to the excellent high temperature oxidation resistant performance of 00Cr25Ni22Mo2N austenitic stainless steel.
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LI Lei，CHEN Wei，CHEN De-min，YANG Ke. Oxidation behavior of 00Cr25Ni22Mo2N austenitic stainless steel at high temperature. Iron and Steel, 2016, 51(1): 94-98.
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2016, Vol. 51 
