Experimental study on evolution of oxidation behavior on high-temperature continuous casting slab surface

Siyuan Zhang; Mujun Long; Haohao Zhang; Songyuan Ai; Dengfu Chen; Peng Liu; Huamei Duan

Journal of Materials Research and Technology (Mar 2021)

Experimental study on evolution of oxidation behavior on high-temperature continuous casting slab surface

Siyuan Zhang,
Mujun Long,
Haohao Zhang,
Songyuan Ai,
Dengfu Chen,
Peng Liu,
Huamei Duan

Affiliations

Siyuan Zhang: Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, PR China
Mujun Long: Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, PR China; Corresponding author.
Haohao Zhang: Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, PR China
Songyuan Ai: Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, PR China
Dengfu Chen: Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, PR China
Peng Liu: Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, PR China
Huamei Duan: Laboratory of Metallurgy and Materials, College of Materials Science and Engineering, Chongqing University, Chongqing, 400044, PR China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing, 400044, PR China

Journal volume & issue: Vol. 11
pp. 2049 – 2058

Abstract

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The oxidation kinetics, oxide layers composition and thicknesses of X70 steel, Y55 steel and 304 stainless steel are investigated. The results show that the oxidation rate of X70 steel increases rapidly at 1000 °C, while that of Y55 steel and 304 stainless steel increases rapidly at 1100 °C. The oxidation kinetic coefficients of X70 steel, Y55 steel and 304 stainless steel are exp (10.7), exp (11.58) and exp (30.15), respectively, and the apparent activation energy of oxide layer are 196879.7 J/mol, 207608.1 J/mol and 469284.3 J/mol, respectively. The cross-sectional morphology and element distribution of oxide layer are obtained. With the oxidation time increases from 30min to 80 min at 1100 °C, the oxide layer thickness of X70 steel and Y55 steel increases by 1242.33 μm and 965.59 μm respectively when the weight of steels increases by 1 mg/mm2, and the oxide layer of Y55 steel is denser than that of X70 steel. A variable temperature oxidation mathematical model of the slab surface is established to predict the oxide layer thickness of slab surface.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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