NDLI: Effect of Slag Composition on Inclusions in Si-Deoxidized 18Cr-8Ni Stainless Steels

Content Provider	Springer Nature Link
Author	Ren, Ying Zhang, Lifeng Fang, Wen Shao, Shijie Yang, Jun Mao, Weidong
Copyright Year	2015
Abstract	Laboratory experiments and thermodynamic calculation for the Si-deoxidized 18Cr-8Ni stainless steel with CaO-Al$_{2}$O$_{3}$-SiO$_{2}$-CaF$_{2}$-MgO-MnO slag were performed to investigate the effect of slag composition on inclusions in Si-deoxidized 18Cr-8Ni stainless steels. A high-basicity slag improved the cleanness of stainless steel, while a low basicity slag lowered the Al$_{2}$O$_{3}$ content in inclusions, lowering the melting temperature of inclusions and improving the deformability of inclusions. Approximately, 15 pct content of MgO in the initial slag was beneficial to reduce the corrosion of refractory and would not influence the composition of inclusions. The Al$_{2}$O$_{3}$ in slag should be lowered to a minimum to reduce the Al$_{2}$O$_{3}$ content in inclusions in Si-deoxidized 18Cr-8Ni stainless steel. The $$ \log X_{{{\text{Al}}_{ 2} {\text{O}}_{ 3} }}^{i} + \log X_{\text{MgO}}^{i} - \log X_{MnO}^{i} - \log X_{{{\text{SiO}}_{2} }}^{i} $$ of inclusions was expressed as a linear function of $$ \log a_{{{\text{Al}}_{ 2} {\text{O}}_{ 3} }}^{\text{s}} + \log a_{\text{CaO}}^{\text{s}} - \log a_{MnO}^{\text{s}} - \log a_{{{\text{SiO}}_{2} }}^{\text{s}} $$ of the slag, which was used to predict the composition of inclusions based on the activity of Al$_{2}$O$_{3}$, CaO, SiO$_{2}$, and MnO in the slag. Moreover, the equilibrium curve of Al-O and the stability diagram of inclusions in Si-deoxidized 18Cr-8Ni stainless steel at 1873 K (1600 °C) were calculated.
Starting Page	1024
Ending Page	1034
Page Count	11
File Format	PDF
ISSN	10735615
Journal	Metallurgical and Materials Transactions B
Volume Number	47
Issue Number	2
e-ISSN	15431916
Language	English
Publisher	Springer US
Publisher Date	2015-12-18
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Metallic Materials Characterization and Evaluation of Materials Structural Materials Surfaces and Interfaces, Thin Films Nanotechnology
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Metals and Alloys Mechanics of Materials Condensed Matter Physics

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