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Studies on the Determination of Stable Oxides in Low-Alloy Steels Using a Combination of Chemical Separations / J. P. McKaveney, W. J. Raber, G. L. Vassilaros, J. M. Snook

Conference Author
Determination of Nonmetallic Compounds in Steel (1965 : Lafayette, Ind)
Physical Description
1 online resource (28 pages) : illustrations, figures, tables
Additional Creators
McKaveney, J. P., Raber, W. J., Snook, J. M., Vassilaros, G. L., American Society for Testing and Materials, and ASTM International
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Summary
A chemical process was developed for treating inclusions electrolytically separated from silicon or aluminum deoxidized steels, so that stable oxides were isolated for analysis. The electrolysis, a Klinger and Koch type modified by substituting ammonium salts for the sodium salts in the electrolyte, was followed by methanolic bromination of the centrifuged residue. Use of ammonium salts prevented sodium oxide chemisorption. If the residue contained carbides, nitrides, or sulfides, which are stable to bromine, the residue from the methanolic bromination was treated with a dilute mixture of nitric and hydrochloric acid. The residue from the acid treatment was then ignited and fused with Na2B4O7. The melt was leached with 10 per cent citric acid, which contained cobalt as an internal standard, and analyzed spectrochemically using a rotating disk solution technique. Proper specimen preparation is required. Argon atmosphere austenitizing is recommended rather than salt bath austenitizing as the latter can lead to considerable spinel formation. Data are presented for analyses of low-alloy steels ranging from 0.03 to 0.34 carbon, and up to 0.78 manganese, 0.20 silicon, and 0.05 aluminum as well as for medium alloy steels ranging from 0.20 to 0.40 carbon, and up to 0.75 manganese, 0.30 silicon, 1.75 nickel, 1.60 chromium, and 1.15 aluminum. A refractory type of aluminum nitride has been found in high-aluminum (1.15 aluminum) steels, which can lead to errors in alumina values. Contrary to a previous German report, this nitride is completely unaffected by metallurgical treatment of the specimen.
Dates of Publication and/or Sequential Designation
Volume 1966, Issue 393 (January 1966)
Subject(s)
Other Subject(s)
ISBN
0803161662
9780803160125 (e-ISBN)
9780803161665
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 13.
Other Forms
Also available in PDF edition.
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1966. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
View MARC record | catkey: 28009009