Abstract：In order to evaluate the effects of Si on oxidation kinetics behavior of steels， the oxidation behaviors of Fe-0.2Si steel and Fe-2Si steel at 900-1 200 ℃ in the air-steam atmosphere were investigated by TGA in order to calculate the oxidation rates of two steels. The activation energies of the two steels were obtained. The results show that the oxidation kinetics cures of the two steels obey linear law in the early stage of oxidation process. It appeared that a critical thickness of scale existed，at which the law of the scale-growth mechanism changed from linear to parabolic. The critical thickness of scale increased with the silicon mass percent in the steel increasing and the temperature rising.
收稿日期: 2018-03-06
出版日期: 2018-10-11
引用本文:
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2018, Vol. 53 
