Formación de microporosidad interna en polvos de acero inoxidable: cinética y mecanismo

M. Martínez; W. Suwardjo; L. García; A. Formoso; A. Cores

doi:10.3989/revmetalm.2002.v38.i3.399

Internal microporosity formation in stainless steel powders: kinetics and mechanism

Authors

M. Martínez Instituto Superior Pedagógico para la Educación Técnica Profesional (ISPETP) Ciudad de la Habana
W. Suwardjo Centro de Investigaciones Metalúrgicas (CIME) Ciudad de la Habana
L. García Centro de Investigaciones Metalúrgicas (CIME) Ciudad de la Habana
A. Formoso Centro Nacional de Investigaciones Metalúrgicas (CENIM/CSIC). Madrid
A. Cores Centro Nacional de Investigaciones Metalúrgicas (CENIM/CSIC). Madrid

DOI:

https://doi.org/10.3989/revmetalm.2002.v38.i3.399

Keywords:

Powder metallurgy, Atomizing, Stainless steel powders, Microporosity, Decarburisation annealing

Abstract

The internal microporosity of stainless steel powders is obtained by a technology developed in the Metallurgical Research Center (CIME) in collaboration with ISPETP, which consists of carbon enrichment of alloy during the fusion process, and after powder atomization a subsequent decarburization annealing. The internal microporosity, which can reach up to 10 volume percent of the steel particle, reduces powder density and improves powder compressibility, while costs for technology installation are also reduced. In this paper the technology for obtaining the microporosity, the mathematical models of the process, and the structural transformations undergone by stainless steel powder are shown. It is concluded that for carbon contents lower than 0.05% internal microporosity tends to disappear.

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Published

2002-06-30

How to Cite

Martínez, M., Suwardjo, W., García, L., Formoso, A., & Cores, A. (2002). Internal microporosity formation in stainless steel powders: kinetics and mechanism. Revista De Metalurgia, 38(3), 173–182. https://doi.org/10.3989/revmetalm.2002.v38.i3.399

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Issue

Vol. 38 No. 3 (2002)

Section

Articles

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