Effects of carbon content and solidification rate on thermal conductivity of grey cast iron
The thermal conductivity or diffusivity of pearlitic grey irons with various carbon contents is investigated by the laser flash method. The materials are cast in controlled thermal environments and produced in three dissimilar cooling rates. The cooling rate together with the carbon content largely...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Foundry Journal Agency
2007-08-01
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| Series: | China Foundry |
| Subjects: | |
| Online Access: | http://www.foundryworld.com/uploadfile/2008111841513937.pdf |
| _version_ | 1818393966226178048 |
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| author | Daniel Holmgren Attila Dioszegi Ingvar L. Svensson |
| author_facet | Daniel Holmgren Attila Dioszegi Ingvar L. Svensson |
| author_sort | Daniel Holmgren |
| collection | DOAJ |
| description | The thermal conductivity or diffusivity of pearlitic grey irons with various carbon contents is investigated by the laser flash method. The materials are cast in controlled thermal environments and produced in three dissimilar cooling rates. The cooling rate together with the carbon content largely influence the thermal conductivity of grey iron. Linear relationships exist between the thermal conductivity and the carbon content, the carbon equivalent and the fraction of former primary solidified austenite transformed into pearlite. The work shows that optimal thermal transport properties are obtained at medium cooling rates. Equations describing the thermal conductivity of pearlite,solidified as pre-eutectic austenite, and the eutectic of grey iron are derived. The thermal conductivity of pearlitic grey iron is modeled at both room temperature and elevated temperature with good accuracy. |
| first_indexed | 2024-12-14T05:53:42Z |
| format | Article |
| id | doaj.art-a0208999a3e54251a58defc69cf27843 |
| institution | Directory Open Access Journal |
| issn | 1672-6421 |
| language | English |
| last_indexed | 2024-12-14T05:53:42Z |
| publishDate | 2007-08-01 |
| publisher | Foundry Journal Agency |
| record_format | Article |
| series | China Foundry |
| spelling | doaj.art-a0208999a3e54251a58defc69cf278432022-12-21T23:14:39ZengFoundry Journal AgencyChina Foundry1672-64212007-08-0143210214Effects of carbon content and solidification rate on thermal conductivity of grey cast ironDaniel HolmgrenAttila DioszegiIngvar L. SvenssonThe thermal conductivity or diffusivity of pearlitic grey irons with various carbon contents is investigated by the laser flash method. The materials are cast in controlled thermal environments and produced in three dissimilar cooling rates. The cooling rate together with the carbon content largely influence the thermal conductivity of grey iron. Linear relationships exist between the thermal conductivity and the carbon content, the carbon equivalent and the fraction of former primary solidified austenite transformed into pearlite. The work shows that optimal thermal transport properties are obtained at medium cooling rates. Equations describing the thermal conductivity of pearlite,solidified as pre-eutectic austenite, and the eutectic of grey iron are derived. The thermal conductivity of pearlitic grey iron is modeled at both room temperature and elevated temperature with good accuracy.http://www.foundryworld.com/uploadfile/2008111841513937.pdfgrey ironthermal conductivitythermal diffusivitycarbon contentcarbon equivalentcolour etchinggraphite morphologyeutectic cell sizeprimary austenitecooling rate |
| spellingShingle | Daniel Holmgren Attila Dioszegi Ingvar L. Svensson Effects of carbon content and solidification rate on thermal conductivity of grey cast iron China Foundry grey iron thermal conductivity thermal diffusivity carbon content carbon equivalent colour etching graphite morphology eutectic cell size primary austenite cooling rate |
| title | Effects of carbon content and solidification rate on thermal conductivity of grey cast iron |
| title_full | Effects of carbon content and solidification rate on thermal conductivity of grey cast iron |
| title_fullStr | Effects of carbon content and solidification rate on thermal conductivity of grey cast iron |
| title_full_unstemmed | Effects of carbon content and solidification rate on thermal conductivity of grey cast iron |
| title_short | Effects of carbon content and solidification rate on thermal conductivity of grey cast iron |
| title_sort | effects of carbon content and solidification rate on thermal conductivity of grey cast iron |
| topic | grey iron thermal conductivity thermal diffusivity carbon content carbon equivalent colour etching graphite morphology eutectic cell size primary austenite cooling rate |
| url | http://www.foundryworld.com/uploadfile/2008111841513937.pdf |
| work_keys_str_mv | AT danielholmgren effectsofcarboncontentandsolidificationrateonthermalconductivityofgreycastiron AT attiladioszegi effectsofcarboncontentandsolidificationrateonthermalconductivityofgreycastiron AT ingvarlsvensson effectsofcarboncontentandsolidificationrateonthermalconductivityofgreycastiron |