Phase Transformation of Thermally Grown FeO Formed on High-Purity Fe at Low Oxygen Potential

被引：13

作者：

Hayashi, Shigenari ^{[1
]}

Yoneda, Suzue ^{[1
,2
]}

Kondo, Yasumitsu ^{[3
]}

Tanei, Hiroshi ^{[3
]}

机构：

[1] Hokkaido Univ, Fac Engn, Div Mat Sci & Engn, Kita Ku, N13,W8, Sapporo, Hokkaido 0608628, Japan

[2] Hokkaido Res Org, Ind Res Inst, Ind Technol Res Dept, Kita Ku, N19,W11, Sapporo, Hokkaido 0600819, Japan

[3] Nippon Steel Corp Ltd, Tech Dev Bur, Kimitsu R&D Lab, Futtsu 2991141, Japan

来源：

OXIDATION OF METALS | 2020年 / 94卷 / 1-2期

关键词：

Hot-rolled steel strip; Phase transformation of FeO; FeO; Fe3O4 eutectoid reaction; Magnetite seam; Low P-O2; SCALE; STEEL; MECHANISM; BEHAVIOR; COILING;

D O I：

10.1007/s11085-020-09979-2

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The isothermal phase transformation behavior of thermally grown oxide scale of FeO on high-purity Fe was investigated under conditions of low oxygen potential. The phase transformation comprised three reactions, namely Fe3O4 precipitation, magnetite seam formation, and the eutectoid decomposition. The nucleation rate of Fe3O4 precipitation decreased with decreasing oxygen potential, whereas the incubation period for the eutectoid decomposition became longer. In contrast, magnetite seam formation was independent of the oxygen potential. The overall phase transformation was found to reach completion faster in an atmosphere with a lower oxygen potential. The effect of the oxygen potential on the phase transformation of FeO scale was rationalized by the different degree of supersaturation for Fe3O4 precipitation, which plays a crucial role in the eutectoid reaction.

引用

页码：81 / 93

页数：13

共 13 条

[1] Effects of Coiling Temperature and Cooling Condition on Transformation Behavior of Tertiary Oxide Scale [J].