Effects of Solution Depletion and Segregation Oxidation on Morphology of Modified 310 Austenitic Stainless Steel

被引：0

作者：

Hong-ying SUN ^{[1
]}

Qiang HE ^{[1
]}

Zhang-jian ZHOU ^{[2
]}

Man WANG ^{[2
]}

Guang-ming ZHANG ^{[2
]}

Shao-fu LI ^{[2
]}

机构：

[1] Key Laboratory of Key Functional Parts of Machine,Anyang Institute of Technology

[2] School of Materials Science and Engineering,University of Science and Technology Beijing

来源：

JournalofIronandSteelResearch(International) | 2016年 / 23卷 / 04期

关键词：

austenitic stainless steel; SEM; morphology; oxidation; segregation; element;

D O I：

暂无

中图分类号：

TG142.71 [不锈钢、耐酸钢];

学科分类号：

080502 ;

摘要：

The oxidation morphologies of modified 310 steel exposed in 900 and 1 100℃air were investigated.A double layer morphology consisting of a(Cr,Mn)-rich outer layer and a fine Cr-rich inner layer was formed at 900 ℃.It was related to the breakaway oxidation induced by the Cr-depletion and the Mn-segregation in inner layer.Some Crrich oxides with amorphous state were formed along grain boundaries.And some new finer oxide grains,voids and Cr-rich precipitates were observed in spallation areas at 1 100 ℃.Correspondingly,the oxidation kinetic curve dropped with the spallation of scale and increased with the formation of some new oxide grains.It was caused by segregation of Cr and the transformation of oxides from Cr2O3to the volatile oxides at elevated temperature.XRD analysis showed that the precipitates were mainly composed of CrO3.Segregation and depletion for solutions were also discussed by oxidation diffusion mechanisms.

引用

页码：393 / 400

页数：8

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