Ti 미량합금강의 오스테나이트 결정립 성장 거동에 미치는 카본 함량변화의 영향Influence of Carbon Content on the Austenite Grain Growth of Ti-microalloyed Steels

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The influence of carbon content on the austenite grain growth of Ti-microalloyed C-Mn steels during reheating to the austenite region has been studied using optical microscope and transmission electron microscope. The austenite grain coarsening temperature(GCT) particulary at the center of slab decreases as the carbon content increases from 0.09wt% to near peritectic composition(0.16wt.%). This is believed to arise from the effect of carbon content as the segregation behavior of the interdendritic region! The degree of segregation is distinctively small in low carbon steel because of two simultaneous effects, namely the faster diffusion rate and shorter diffusion length. This is because of dendrite formation mechanism differs depending on the carbon content. The austenite grain size during reheating is observed to be distinctively small in the case of low carbon steel. This is due to the fact that the upper temperature for the austenite single phase region is comparatively low in the case of low carbon steel.
Publisher
대한금속·재료학회
Issue Date
1997-12
Language
Korean
Citation

대한금속·재료학회지, v.35, no.12, pp.1602 - 1608

ISSN
1738-8228
URI
http://hdl.handle.net/10203/72443
Appears in Collection
MS-Journal Papers(저널논문)
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