Fabrication of lotus-type porous carbon-steel by continuous casting technique in nitrogen atmosphere

M. Kashihara, H. Yonetani, Shinsuke Suzuki, K. S.Hyun, Y. S.Kim, Y. Kawamura, H. Nakajima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Lotus-type porous carbon steel (AISI1018) with long cylindrical pores aligned in one direction was fabricated by continuous casting technique at various transference velocities in pressurized nitrogen atmosphere. The molten carbon steel dissolving nitrogen in a crucible was solidified continuously through a cooled mold as being pulled down at a given velocity. Intermittent transference was applied in order to prevent the blockage of melt during solidification in the mold. Long lotus-type porous rod can be fabricated by this technique. The size and the morphology of pores were significantly affected by the transference velocity, which changes the cooling condition during solidification. At a low transference velocity the solid-liquid interface was kept perpendicular to the transference direction, which is necessary for formation of pores aligned in one direction. With increase of the transference velocity, the pores became coarse and irregular in the center part of the porous carbon steel. At a high velocity the solid-liquid interface was deep concave and the pores grew in the radial direction toward the center. Collision and merging of the pores at the center part caused the coarsening. This is typical for metals with low heat conductivity such as carbon steel at a high velocity, because the center part is cooled down much slower than the surface.

Original languageEnglish
Title of host publicationMetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams
Pages201-204
Number of pages4
Publication statusPublished - 2008
Externally publishedYes
Event5th International Conference on Porous Metals and Metallic Foams, MetFoam 2007 - Montreal, QC
Duration: 2008 Sep 52008 Sep 7

Other

Other5th International Conference on Porous Metals and Metallic Foams, MetFoam 2007
CityMontreal, QC
Period08/9/508/9/7

Fingerprint

Continuous casting
Carbon steel
Nitrogen
Fabrication
Solidification
Crucibles
Liquids
Coarsening
Merging
Molten materials
Thermal conductivity
Metals
Cooling
Direction compound

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Kashihara, M., Yonetani, H., Suzuki, S., S.Hyun, K., S.Kim, Y., Kawamura, Y., & Nakajima, H. (2008). Fabrication of lotus-type porous carbon-steel by continuous casting technique in nitrogen atmosphere. In MetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams (pp. 201-204)

Fabrication of lotus-type porous carbon-steel by continuous casting technique in nitrogen atmosphere. / Kashihara, M.; Yonetani, H.; Suzuki, Shinsuke; S.Hyun, K.; S.Kim, Y.; Kawamura, Y.; Nakajima, H.

MetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams. 2008. p. 201-204.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kashihara, M, Yonetani, H, Suzuki, S, S.Hyun, K, S.Kim, Y, Kawamura, Y & Nakajima, H 2008, Fabrication of lotus-type porous carbon-steel by continuous casting technique in nitrogen atmosphere. in MetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams. pp. 201-204, 5th International Conference on Porous Metals and Metallic Foams, MetFoam 2007, Montreal, QC, 08/9/5.
Kashihara M, Yonetani H, Suzuki S, S.Hyun K, S.Kim Y, Kawamura Y et al. Fabrication of lotus-type porous carbon-steel by continuous casting technique in nitrogen atmosphere. In MetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams. 2008. p. 201-204
Kashihara, M. ; Yonetani, H. ; Suzuki, Shinsuke ; S.Hyun, K. ; S.Kim, Y. ; Kawamura, Y. ; Nakajima, H. / Fabrication of lotus-type porous carbon-steel by continuous casting technique in nitrogen atmosphere. MetFoam 2007 - Proceedings of the 5th International Conference on Porous Metals and Metallic Foams. 2008. pp. 201-204
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