High Temperature Oxidation Behavior of Si-Mo Ferritic Ductile Cast Iron

Kyeong Hwan Choe; Sang Mok Lee; Kyong Whoan Lee

doi:10.4028/www.scientific.net/MSF.654-656.542

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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656High Temperature Oxidation Behavior of Si-Mo...

High Temperature Oxidation Behavior of Si-Mo Ferritic Ductile Cast Iron

Abstract:

High temperature oxidation behavior of Si-Mo ferritic ductile cast iron was investigated in the point of the effect of chromium and vanadium addition. The addition of Cr promoted the formation of as-cast pearlite around carbide which exists in cell boundary, which was eliminated during annealing process. The addition of vanadium promoted the precipitation of tiny carbide and reduced the grain size of ferrite. As the test temperature increased, the change of volume increased, on the other hand, the change of weight decreased above 1173K. In the case of Cr added specimen, the change of weight decreased with the increase of test temperature because of the presence of Cr oxide layer. The vanadium added specimens showed higher increase in the weight and volume change. The oxide layer of vanadium added specimen had very porous structure and showed severe internal oxidation. It is due to the catastrophic oxidation characteristic of vanadium alloyed ferrous alloy.

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Periodical:

Materials Science Forum (Volumes 654-656)

Pages:

542-545

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.542

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Online since:

June 2010

Authors:

Kyeong Hwan Choe, Sang Mok Lee, Kyong Whoan Lee

Keywords:

Cr Addition, High Si-Mo Ductile Cast Iron, High Temperature Strength, Oxidation Behavior, V Addition

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