Effect of Intergranular Precipitation on the Internal Oxidation Behavior of Cr-Mn-N Austenitic Stainless Steels

被引：5
|
作者：
Zheng, Lei-Gang [1 ]
Hu, Xiao-Qiang [1 ]
Kang, Xiu-Hong [1 ]
Li, Dian-Zhong [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
来源：
ACTA METALLURGICA SINICA-ENGLISH LETTERS | 2015年 / 28卷 / 08期
基金：
中国国家自然科学基金;
关键词：
M23C6; precipitation; Internal oxidation; Cr-Mn-N austenitic steel; HIGH-TEMPERATURE OXIDATION; AL2O3-FORMING ALLOYS; BREAKAWAY OXIDATION; OXIDE SCALES; RESISTANCE; VOLATILIZATION; INTERCONNECTS; ADDITIONS; SOFCS; AIR;
D O I：
10.1007/s40195-015-0288-7
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effect of intergranular precipitation on the internal oxidation behavior of Cr-Mn-N austenitic steels at 1000 degrees C in dry air atmosphere was investigated using scanning electron microscope, transmission electron microscope, and X-ray diffraction analysis. The results show that intergranular M23C6 carbide morphologies play an important role on the internal oxidation behavior of Cr-Mn-N steels. During the period of the oxidation, both discontinuous chain-shaped and continuous film-shaped intergranular M23C6 carbides precipitated along the grain boundaries. Internal oxides of silica preferentially intruded into the matrix along grain boundaries with discontinuous M23C6 carbide particles, while silica was obviously restricted at the interfaces between the external scale and matrix on the occasion of continuous film-shaped M23C6 carbides. It is seemed that reasonable microstructure could improve the oxidation resistance of Cr-Mn-N steels.
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页码：1008 / 1014
页数：7
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