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In situ observation of calcium oxide treatment of inclusions in molten steel by confocal microscopy

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Khurana, Bharat, Spooner, Stephen, Rao, M. B. V., Roy, Gour Gopal and Srirangam, Prakash (2017) In situ observation of calcium oxide treatment of inclusions in molten steel by confocal microscopy. Metallurgical and Materials Transactions B . doi:10.1007/s11663-017-0956-2

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Official URL: http://dx.doi.org/10.1007/s11663-017-0956-2

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Abstract

Calcium treatment of aluminum killed steel was observed in situ using high-temperature confocal scanning laser microscope (HT-CSLM). This technique along with a novel experimental design enables continuous observation of clustering behavior of inclusions before and after the calcium treatment. Results show that the increase in average inclusion size in non-calcium-treated condition was much faster compared to calcium-treated condition. Results also show that the magnitude of attractive capillary force between inclusion particles in non-treated condition was about 10−15 N for larger particles (10 µm) and 10−16 N for smaller particles (5 µm) and acting length of force was about 30 µm. In the case of calcium-treated condition, the magnitude and acting length of force was reduced to 10−16 N and 10 µm, respectively, for particles of all sizes. This change in attractive capillary attractive force is due to change in inclusion morphology from solid alumina disks to liquid lens particles during calcium treatment.

Item Type: Journal Article
Subjects: Q Science > QH Natural history
T Technology > TN Mining engineering. Metallurgy
T Technology > TS Manufactures
Divisions: Faculty of Science > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Confocal microscopy , Steel--Inclusions, Steelwork
Journal or Publication Title: Metallurgical and Materials Transactions B
Publisher: Springer New York LLC
ISSN: 1073-5615
Official Date: 9 March 2017
Dates:
DateEvent
9 March 2017Published
27 February 2017Accepted
Date of first compliant deposit: 14 March 2017
DOI: 10.1007/s11663-017-0956-2
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access

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