Naslov
Formation of chunky graphite in spheroidal graphite cast iron

Autori
Bauer, Branko ; Mihalic, Ivana ; Tolić, Ana ; Unkić, Faruk

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Conference Proceedings of 54th International Foundry Conference Portorož 2014 / Križman, Alojz ; Jan-Blažić, Mirjam ; Debelak, Martin ; Schumacher, Peter ; Mrvar, Primož ; Medved, Jože - Ljubljana : Društvo livarjev Slovenije, 2014

ISBN
978-961-93723-0-2

Skup
54th International Foundry Conference Portorož 2014

Mjesto i datum
Portorož, Slovenija, 17.09.2014. - 19.09.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
chunky graphite; formation of chunky graphite; mechanical properties of castings

Sažetak
In recent years, the production of ductile iron castings has increased considerably due to increasing application in the existing traditional market and expansion in the heavy section sector - like wind turbine components and heavy transport vehicle parts. In the production of massive, heavy section castings many foundries are faced with the problem of decreasing of mechanical properties due to the graphite degeneration. Chunky graphite is certainly one of the most deleterious graphite degeneration in thick-walled ductile iron castings. This degeneracy occurs in the thermal center of the casting and develops as interconnected and highly branched graphite strings. In this paper, mechanisms of formation chunky graphite and influential factors that promote its formation, are discussed. The effect of different cooling rates on graphite morphology and mechanical properties of ductile iron EN-GJS-400-15 were investigated. 25 and 75 mm Y samples and 200 mm cylinder with a height of 300 mm were cast. The presence of chunky graphite was revealed in the thermal center of the cylinder causing the decrease of mechanical properties.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA