ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Spatial Distribution of Tramp Element Contents in Recycled Steel
Shunsuke KuzuharaHaruka SakumaHideo HayashiIchiro Daigo
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2017 Volume 57 Issue 4 Pages 758-763

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Abstract

In this research, we analyzed electric furnace steel using the laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) method with the objective of quantitatively evaluating the concentration distributions of tramp elements present in microdomains. Point analysis was carried out for nine microdomain locations (defined as Areas) measuring 500 µm (length) × 600 µm (width) for the elements Cu, Sn, Ni, Mn, W, Cr, Mo, Ag, Pb, and B.

The highest concentration of Cu found in Area 4 was 4936 ppm, while the lowest was 674 ppm in Area 5. The correlations between Cu concentration and concentrations of other elements were analyzed for all measured points. Mo, W, Mn, Sn had correlation coefficients of more than 0.65, while Pb, Ag, Ni, B, Cr had correlation coefficients of −0.15 to +0.22. Furthermore, concentration distributions for the four elements with high correlations were analyzed for regions where the Cu concentration was more than 1.5-times the bulk concentration (5490 ppm).

Correlation of Cu concentration with those of the other measured elements. Fullsize Image
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© 2017 by The Iron and Steel Institute of Japan
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