발간논문

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Vol.35, No.2, 181 ~ 191, 1997
Title
Research Paper - Transformations : Phase Transformations and Subsequent Solute Redistribution Behaviors of Fe - 15Cr - 5V - 1.2C Alloy
조규변Gue Serb Cho, 김창변Chang Seob Kim, 오규환Kyu Hwan Oh, 라자용Hyung Yong Ra
Abstract
Transformation sequence and subsequent solute redistribution behaviors of Fe-15Cr-5V-1.2C alloy during solidification have been discussed. Specimens were quenched interruptly, as they were solidified and transformed. Primary δ-ferrite was not completely transformed into γ-austenite during δ→γ peritectic reaction. During the peritectic reaction V was enriched to the retained δ-ferrite, but Cr was not. When the retained δ-ferrite was directly changed into α-ferrite. V was diffused from δ-ferrite into the surrounding γ-austenite due to the decrease of V-solubility in the α-ferrite. As heating the as-cast specimen up to 1000℃, precipitated iron complex carbides were dissolved into the newly formed γ-austenite. The iron carbides were inferred as M_(23)C_6 carbides from the mole fraction change of each phases existing at the heating temperatures and microstructure change with increasing heating temperatures.
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