Naslov
EFFECT OF HIGH SILICON CONTENT ON THE PROPERTIES OF DUCTILE IRON CASTINGS
(Utjecaj povišenog sadržaja silicija na svojstva odljevaka od nodularnog lijeva)

Autori
Bauer, Branko ; Mihalic Pokopec, Ivana ; Šaban, Marko

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Skup
19th International Foundrymen Conference

Mjesto i datum
Split, Hrvatska, 16-18.06.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
ductile cast iron ; high silicon ; cooling rate ; microstructure ; mechanical properties

Sažetak
This paper investigates the influence of silicon content of 3.5 wt. % on the microstructure and mechanical properties of ductile cast iron at different cooling rates. The cast geometry consists of samples with different thickness ; cone block with diameter 300 mm and height 350 mm and standard Y2 and Y3 keel-blocks. Microstructure analysis and tensile test were performed on the as-cast materials. Based on the metallographic observations of the present work, it could be concluded that silicon content of 3.5 wt. % has negative effect on spheroidal graphite morphology for this melt and solidification conditions. Tensile test showed that silicon strengthens the ferrite, resulting in an increase in yield and tensile strength, while the elongation decreases. Also, based on the metallographic observations in this investigation, the risk of chunky graphite formation increases with increase in wall thickness, i.e., lowering of the cooling rate. Chunky graphite formation negatively effects on mechanical properties, especially elongation, in cast irons with silicon content higher than 3.5 wt. %.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA