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논문 기본 정보

자료유형
학술저널
저자정보
Ce Liang (Central South University) Guangxin Song (Central South University) Liguang Liang (Central South University) Wanlin Wang (Central South University) Jie Zeng (Central South University)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.30 No.8
발행연도
2024.8
수록면
2,269 - 2,281 (13page)
DOI
10.1007/s12540-024-01633-9

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초록· 키워드

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An experimental investigation has been conducted with respect to the element segregation and microstructure evolution of aMn–Cr–Mo alloyed oil casing steel from different solidification cooling rates (0.5 °C/s, 3 °C/s and 10 °C/s) and subsequentdefined homogenization treatment using the confocal scanning laser microscope (CSLM). A quantitative relation betweenthe secondary dendrite arm spacing and cooling rates is achieved through regression analysis. The experimental resultsshown that the micro-segregation area of Mn, Cr and Mo elements decreased significantly, but its concentration increasedin the finer inter-dendritic region with the increase of solidification cooling rate. The distribution of the experimental elementsdetermined by the grid point measurements (obtained with EPMA-WDS) processed by the weighted interval ranksort method is consistent with the modified V–B segregation model considering the proper partition coefficient by the massbalance analysis method. Moreover, the residual element segregation index apparently decreased and the element microsegregationwas effectively eliminated during the subsequent homogenization treatment especially for the sample preparedby a higher cooling rate in the as-cast period.

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