Mechanism of Magnetite Seam Formation and its Role for FeO Scale Transformation

被引：22

作者：

Shizukawa, Yuta ^{[1
]}

Hayashi, Shigenari ^{[1
,3
]}

Yoneda, Suzue ^{[1
,3
]}

Kondo, Yasumitsu ^{[2
]}

Tanei, Hiroshi ^{[2
]}

Ukai, Shigeharu ^{[1
]}

机构：

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

[2] Nippon Steel & Sumitomo Met Corp, Integrated Proc R&D Div, Tech Res & Dev Bur, Proc Res Labs, 20-1 Shintomi, Futtsu, Chiba 2938511, Japan

[3] Tokyo Inst Technol, Dept Mat Sci & Engn, Meguro Ku, 2-12-1-S8-3 Ookayama, Tokyo 1528552, Japan

来源：

OXIDATION OF METALS | 2016年 / 86卷 / 3-4期

关键词：

Hot-rolled steel strip; Phase transformation of FeO; FeO/Fe3O4 eutectoid reaction; Magnetite seam; ROLLED STEEL STRIP; SELF-DIFFUSION; IRON; AIR;

D O I：

10.1007/s11085-016-9638-8

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The phase transformation behavior of a thermally grown oxide scale of FeO on pure-Fe and an Fe-2wt%Au alloy was investigated. Particular attention was paid to formation of a magnetite seam, which is the Fe3O4 layer formed at the FeO/alloy interface at an initial stage of the phase transformation, since it has important effects on the overall phase transformation of FeO scale. A thin Au(Fe) layer was found to develop on the Fe-Au alloy at the FeO/alloy interface after 32 min of oxidation at 750 A degrees C in air. This Au(Fe) layer prevented formation of a magnetite seam and accelerated the FeO eutectoid reaction. The Au(Fe) layer acted as a "chemical diffusion barrier" for inward diffusion of Fe from the FeO to the alloy substrate across the FeO/alloy interface and prevented magnetite seam formation.

引用

页码：315 / 326

页数：12

共 12 条

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