Influence of Cr Content on the High-Temperature Oxidation Behavior and Mechanism of Low-Alloy Steels

被引：4

作者：

Kwon, Gi-Hoon ^{[1
,2
]}

Park, Hyunjun ^{[1
]}

Choi, Byoungho ^{[1
]}

Lee, Young-Kook ^{[2
]}

Moon, Kyoungil ^{[1
]}

机构：

[1] Korea Inst Ind Technol, Heat & Surface Technol R&D Grp, Shihung 15014, South Korea

[2] Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea

来源：

MATERIALS | 2023年 / 16卷 / 14期

关键词：

high-temperature oxidation; mass gain; chromite; oxidation rate constant; activation energy; OXIDE SCALES; STAINLESS-STEELS; IRON; METALS; AIR;

D O I：

10.3390/ma16144964

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The high-temperature oxidation behavior of low-carbon steel (AISI 1015, AISI 8617, AISI 4115) was investigated over the temperature range from 600 to 1000 & DEG;C in humid air containing 25% water vapor. Mass gain of oxidation measurement was performed to study the oxidation kinetics. The microstructure, thickness, and composition of the oxide scale formed were investigated via optical microscope (OM), scanning electron microscope (SEM) equipped with an energy dispersive spectrometer (EDS), X-ray diffraction (XRD), and electron probe microanalyzer (EPMA). The oxidation process was performed from 2 to 100 min. As the oxidation time increased, the trend of mass gain per unit area switched from a linear to a parabolic law, regardless of the steel grade used. As the chromium content increased, the duration of time during which the oxidation rate followed a linear relationship decreased. In the low-alloy steel with higher chromium content, the thickness of the mixed oxide layer containing Cr increased and the oxidation rate decreased at all oxidation temperatures.

引用

页数：12

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