Relaciones cuantitativas entre los contenidos de azufre y de sulfuros en los aceros inoxidables tipo AISI 303: influencia de la composición química de los sulfuros

J. Botella; C. Merino; M. A. Heredia; J. Almagro

doi:10.3989/revmetalm.1999.v35.i3.621

Quantitative relations between sulphur and sulphide contents in AISI 303 stainless steels: influence of the sulphide chemical composition

Authors

J. Botella AACERINOX, S.A. Centro de Investigación y Ensayos. Los Barrios Cádiz
C. Merino Dpto. de Ciencia de los Materiales e Ingeniería Metalúrgica. Facultad de Ciencias Químicas. UCM
M. A. Heredia ACERINOX, S.A. Centro de Investigación y Ensayos. Los Barrios Cádiz
J. Almagro ACERINOX, S.A. Centro de Investigación y Ensayos. Los Barrios Cádiz

DOI:

https://doi.org/10.3989/revmetalm.1999.v35.i3.621

Keywords:

Stainless steel, Sulphur, Sulphides, Sulphide microanalysis, Volume of sulphide-type inclusions

Abstract

The work has been done with ten AISI 303 stainless steel rods which have similar chemical compositions, except for sulphur which varies between 0.25 and 0.36%. These steels are studied by Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectrometry (EDX). The sulphides are chemically microanalysed and the occupied volume determined by automatic image analysis. It can be inferred that the chemical composition of sulphides in AISI 303 steels is variable to some extent even though the steel chemistry is almost invariable. This could mean that solidification conditions and thermomechanical transformations are able to affect resulting in variations of sulphide compositions. Quantitative relations between sulphur and sulphide contents are established and the influence of sulphide chemical compositions on those relations is studied. The experimental results are compared with those obtained from theoretical calculations. A good approach is obtained when the difference between chemical compositions of real sulphides and the theoretical one, MnS, is taken into account.

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Published

1999-06-30

How to Cite

Botella, J., Merino, C., Heredia, M. A., & Almagro, J. (1999). Quantitative relations between sulphur and sulphide contents in AISI 303 stainless steels: influence of the sulphide chemical composition. Revista De Metalurgia, 35(3), 173–181. https://doi.org/10.3989/revmetalm.1999.v35.i3.621

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Issue

Vol. 35 No. 3 (1999)

Section

Articles

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