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BDG Informationszentrum<br />
Eisengusswerkstoffe<br />
Dokumenten-Nummer: 57855<br />
Tagungsbeitrag<br />
Karbakhsh Ravari, B.; Nili Ahmadabadi, M.<br />
Publikationssprache: Englisch<br />
Influence of Alloying Elements on the Bainitic Transformation of Ductile Iron<br />
Einfluss von Legierungselementen auf die bainitische Umwandlung bei Gusseisen mit Kugelgraphit<br />
Alloing elements may be added to ductile iron to improve mechanical properties or prevent pearlitic transformation<br />
during austempering process. On the other hand, the segregation of alloying elements during solidification changes the<br />
kinetics of austempering process which in turn bainitic transformation would be function of local concentration of<br />
alloying elements. In this research, kinetics of the first stage of bainitic transformation in ductile iron has been studied<br />
by the means of comparing the bainitic tranbsformation in steels with the same composition similar to the alloyed<br />
ductile iron matrix after austempering treatment. According to the results of dilatometry tests, the effect of Si and Mn in<br />
steel samples on the incubation time of bainitic transformation was obtained. Also, the influence of austempering<br />
temperature on "S-shape" curve has been investigated by means of dilatometry data.<br />
University of Tehran, IR<br />
Erscheinungsjahr 2010<br />
S. S.175-180<br />
Seiten/Bil<strong>der</strong>/Tabellen/Quellen: 6S<br />
Eisengusswerkstoffe<br />
Dokumenten-Nummer: 57863<br />
Tagungsbeitrag<br />
König, Mathias; Svensson, Ingvar L.; Wessen, Magnus<br />
Publikationssprache: Englisch<br />
The Influence of Alloying Elements on Chill Formation in CGI<br />
Einfluss von Legierungselementen auf die Bildung von Weißerstarrung bei Gusseisen mit Vermiculargraphit<br />
The influence of alloying elements on the chill formation in Compacted Graphite Iron (CGI) is investigated. Chill wedges<br />
cast in an industrial foundry were used to investigate the chill formation. A total number of 19 chemical compositions<br />
were studied, including three trials of varying nodularity treatment level; four trials of varying copper content; four trials<br />
of varying silicon content; four trials of varying tin content and four trials of varying carbide promoter content. Three<br />
wedges were cast for each alloy composition, of which one was used for measuring the temperature at three different<br />
heights in the wedge. Contrary to some previous reports, the results indicate that low-nodularity CGI is not more prone<br />
to chill formation (columnar white) than high-nodularity CGI. Trends regarding the effect of alloying elements on chill<br />
formation are shown to generally be in agreement with previous work on spheroidal graphite iron and lamellar graphite<br />
iron. Most of the samples also show carbide formation in centre line areas of the wedge (inverse chill), this occurrence<br />
is also discussed in the paper.<br />
Jönköping University, SE<br />
Erscheinungsjahr 2010<br />
S. S.126-131<br />
Seiten/Bil<strong>der</strong>/Tabellen/Quellen: 6S<br />
<strong>Giesserei</strong> <strong>Literaturschau</strong>
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