Analysis of Largest Sulfide Inclusions in Low Carbon Steel by Using Statistics of Extreme Values

被引：20

作者：

Kanbe, Yuichi ^{[1
,2
]}

Karasev, Andrey ^{[1
]}

Todoroki, Hidekazu ^{[2
]}

Jonsson, Par G. ^{[1
]}

机构：

[1] Royal Inst Technol, SE-10044 Stockholm, Sweden

[2] Nippon Yakin Kogyo Co Ltd, Tech Res Ctr, Kawasaki Ku, Kanagawa 2108558, Japan

来源：

STEEL RESEARCH INTERNATIONAL | 2011年 / 82卷 / 04期

关键词：

aspect ratio; cross section; electrolytic extraction; extreme value analysis; maximum size; sulfide inclusion; NONMETALLIC INCLUSIONS; SIZE;

D O I：

10.1002/srin.201000141

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The statistics of extreme values was applied for the determination of the largest sulfide inclusions with different morphology in low carbon steel samples by using both two-dimensional (2D) observations on the polished cross section and three-dimensional (3D) observations on a surface of a film filter after electrolytic extraction of the samples. It was found that the globular, rod-like and dendritic sulfides in the molten steel sample as well as the elongated sulfides in the rolled steel sample can be successfully extracted from the both samples, and analyzed precisely by using extreme value analysis in 3D. Based on the geometrical considerations of the probability for measurement of the true length of rod-like and elongated inclusions on a cross section, it was found that this probability for inclusions decreases dramatically with an increasing real aspect ratio value of them. Particularly for the determination of the true length for elongated inclusions in the rolled steel sample by 2D investigations on a metal cross section, it is required to be cut investigating section of steel sample within +/- 1 degree against rolling direction. Therefore, a 3D observation is considered to be more preferable and accurate than the conventional cross sectional observation in 2D, due to the possibility for the measurements of the real size of them.

引用

页码：313 / 322

页数：10

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