NDLI: Evolution of Nonmetallic Inclusions During Spring Steel Treatment

Content Provider	Springer Nature Link
Author	Stepav, A. B. Zaitsev, A. I. Sarychev, B. A. Dzyuba, A. Yu. Koldaev, A. V.
Copyright Year	2016
Abstract	Features of nonmetallic inclusion formation and evolution in the course of treating spring steel of 54SiCr6 (60S2KhA) grade are studied. It is established that the majority of nonmetallic inclusions (NI) present within steel are complex oxides of the composition SiO$_{2}$–MnO–Al$_{2}$O$_{3}$–CaO–MgO, at whose surface during steel crystallization and cooling as a rule there is a deposit of MnS. NI composition changes in the course of metal treatment. At the start of treatment, their base is MnO–SiO$_{2}$–Al$_{2}$O$_{3}$, and subsequently there is an increase in content of CaO and MgO as a result of molten metal reaction with slag and lining. The average NI size and overall oxygen content decrease in the course of steel treatment, and this points to effective refining. The composition of NI present is close to that of the slag cover assimilating layer used in the intermediate ladle. A more significant increase is noted in MgO and Al$_{2}$O$_{3}$ content within it, and this points to effective assimilation of NI of the most unfavorable types.
Starting Page	917
Ending Page	922
Page Count	6
File Format	PDF
ISSN	00260894
Journal	Metallurgist
Volume Number	59
Issue Number	9-10
e-ISSN	15738892
Language	English
Publisher	Springer US
Publisher Date	2016-01-22
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	spring steels ladle treatment continuous casting nonmetallic inclusions impurity slag assimilation manufacturing technology Metallic Materials Materials Science Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Condensed Matter Physics

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