Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
An investigation of the effect of five different inoculants on the metal expansion penetration in grey cast iron
Jönköping University. (Maskinteknik)ORCID iD: 0000-0003-0453-0503
Jönköping University.
1999 (English)Report (Other academic)
Resource type
Text
Abstract [en]

The production of quality castings requires the casting surface to be clean and free from defects. In some grey cast iron components which are cast in sand moulds, the metal sometimes penetrates into the mould, producing difficulties in cleaning the components. The defect causes very high costs due to component rejection and increased fettling in the casting industry. Most of the grey iron foundries around the world have problems with metal penetration on applicable components. In this work the problem of metal penetration has been studied using a commercial casting component. Eight castings were mounted on the pattern plate and five different inoculants were investigated. The experiments show that the inoculation of grey cast iron will influence the metal penetration in areas with late solidification times and where the melt is in contact with the sand mould. In all experiments 0.14 % inoculant was added in the pouring ladle. The experiments show that the best results to reduce metal penetration have been obtained when using the inoculant which contained silicon, aluminium and zirconium. Using this inoculant, the average penetration area was only about 20 % of what was found using the worst inoculant. However, this inoculant also gave rise to a large tendency to formation sinks.The experiments also show two main classes of eutectic cell size. One class nucleated at the beginning of the eutectic solidification and one at the end of the solidification. Two other inoculants, both containing Al and Si have about the same base composition. From the measurements of penetration areas, one can draw the conclusion that the inoculant with the smallest grain size gives nuclei with the shortest lifetime. The coarser grains give a longer dissolution time and this promotes the survival of the nuclei. At the end of solidification, a larger amount of graphite will precipitate at higher temperatures if new nuclei can be activated. If the hot spot is located close to the metal surface, the metal will expand into the mould; resulting in metal expansion penetration. The worst cases of metal penetration have been obtained using an inoculant containing titanium. A large number of small eutectic cells and high volume of the small cells were observed, which leads to severe penetration.

Place, publisher, year, edition, pages
Jönköping: Ingenjörshögskolan , 1999. , 12 p.
Series
JTH research report, ISSN 1404-0018 ; 1999:2
Keyword [en]
Grey cast iron, metal expansion penetrat ion, inoculant, inoculation, sink, scab.
National Category
Applied Mechanics
Research subject
Technology (byts ev till Engineering)
Identifiers
URN: urn:nbn:se:lnu:diva-51050OAI: oai:DiVA.org:lnu-51050DiVA: diva2:912910
Available from: 2016-03-18 Created: 2016-03-18 Last updated: 2016-04-08Bibliographically approved

Open Access in DiVA

fulltext(1064 kB)19 downloads
File information
File name FULLTEXT01.pdfFile size 1064 kBChecksum SHA-512
318c81ec4f383b70ee23a52e0e7d38ad6a91e0df273a99b5fa2dd44f586ac0a2cc4cf55d2fc2e5100fdac824fe1b2c3518c8d06e898dbd1d7681d5a3160cbdb4
Type fulltextMimetype application/pdf

Other links

Fulltext

Authority records BETA

Dugic, Izudin

Search in DiVA

By author/editor
Dugic, Izudin
Applied Mechanics

Search outside of DiVA

GoogleGoogle Scholar
Total: 19 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 54 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf