Formation of Ferrite with Cr Equivalents and Solidification Rates in Mod. (9-12)Cr-1Mo Steels

Y.H. Kim; H.C. Kim; Yeon-Gil Jung; J.H. Lee; B.H. Chi; S.H. Ryu

doi:10.4028/www.scientific.net/SSP.124-126.1497

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HomeSolid State PhenomenaSolid State Phenomena Vols. 124-126Formation of Ferrite with Cr Equivalents and...

Formation of Ferrite with Cr Equivalents and Solidification Rates in Mod. (9-12)Cr-1Mo Steels

Abstract:

The influence of solidification rates and Cr equivalents on the formation of the ferrite was studied by directional solidification in mod. (9-12)Cr-1Mo steels. It was found that the volume fraction of ferrite increased as increasing Cr equivalent and solidification rate. The volume fraction of the ferrite showed much higher at low solidification rates with the planar or cellular interface than that at high solidification rates with the dendritic interface. The volume fraction of ferrite in solidification microstructure showed much higher than that in extruded and heat-treated alloys. It depends on not only solidification rate and Cr equivalent but also the solidification fraction. At low solidification rates, there occurs segregation because the solid/liquid interface was planar or cellular, and it makes composition change with solidification fractions. The formation of ferrite has been discussed with Cr equivalent and solidification rate.

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Periodical:

Solid State Phenomena (Volumes 124-126)

Pages:

1497-1500

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.124-126.1497

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Online since:

June 2007

Authors:

Y.H. Kim, H.C. Kim, Yeon-Gil Jung, J.H. Lee, B.H. Chi, S.H. Ryu

Keywords:

Directional Solidification, Ferrite, Mod.12Cr-1Mo Steel, Segregation

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