PREPARATION OF NANO-OXIDE DISPERSED STEEL POWDERS BY POWDER METALLURGY

Nanostructured steels may be realized by two different methods. There is well-known the "top-down" method where taking account the grain size the technological step, like Severe Plastic Deformation (SPD) are developing from top to down. The other "bottom-up" method is starting fr...

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Bibliographic Details
Published inRevista de Tehnologii Neconventionale Vol. 14; no. 1; p. 5
Main Authors Balázsi, Csaba, Timár, Imre, Koncz, Péter, Wéber, Ferenc, Horváth, Ákos
Format Journal Article
LanguageEnglish
Published Sibiu Romanian Association for Nonconventional Technologies (ARTN) 01.03.2010
Subjects
Nanotechnology
Powder metallurgy
Sintering
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Summary:Nanostructured steels may be realized by two different methods. There is well-known the "top-down" method where taking account the grain size the technological step, like Severe Plastic Deformation (SPD) are developing from top to down. The other "bottom-up" method is starting from individual grains and is developing the product starting from bottom and ending at the top. The last method is considered the main approach of nanotechnology. In this work a summary of "bottom-up" methodology of preparation and examination of nanostructured steel powders is presented. Other steps of powder metallurgy (PM) as high efficient nano-milling, pressing and sintering will be also highlighted. High efficient attrition mills are on the basis of this work assuring grains with nanostructure and a narrow grains size distribution in the same time. [PUBLICATION ABSTRACT]
ISSN:1454-3087