High temperature oxidation of steels in air and CO2-O2 atmosphere

被引：12
|
作者：
Lee, DB [1 ]
Choi, JW
机构：
[1] Sungkyunkwan Univ, Dept Adv Mat Engn, Suwon 440746, South Korea
[2] POSCO, Tech Res Labs, Gwangyang 545090, South Korea
来源：
OXIDATION OF METALS | 2005年 / 64卷 / 5-6期
关键词：
oxidation; steel; reheat furnace;
D O I：
10.1007/s11085-005-8530-8
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Three kinds of hot rolled steel slabs, viz. high strength steel, bake hardened steel and low carbon steel, were oxidized isothermally between 1100 and 1250 degrees C for up to 2 hr in 1 atm of air and an 85%N-2-10%CO2-5%O-2 gas mixture. The steels were oxidized in a similar fashion in both the atmospheres. The oxidation process followed an initial linear rate law, which then gradually transformed to a nearly parabolic rate law. Thick, porous and nonadherent scales formed rapidly, due to the high oxidation temperature. The scales formed consisted of Fe2O3,(Fe2O3+Fe3O4), (Fe3O4+Fe2O3 +FeO) and (FeO+Fe3O4) from the outer surface. The presence of supersaturated oxygen beneath the scale resulted in grain boundary oxidation and the formation of internal oxide precipitates.
引用
收藏
页码：319 / 329
页数：11
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