Reoxidation of liquid steel and evolution of inclusions during protective atmosphere electroslag remelting of Ce-containing heat-resistant stainless steel

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外文摘要：The evolution of Ce-containing inclusions and its correlation with the reoxidation of liquid steel during protective atmosphere electroslag remelting(ESR)of heat-resistant steel were studied.The reoxidation of liquid steel took place during the ESR,resulting in the oxygen pickup from 0.0014 to 0.0053 wt.％.The inclusions in the consumable electrode,liquid metal pool and remelted ingot are Ce2O2S and Ce2O3 inclusions invariably.The inclusions in the remelted ingot are originated from three ways:(Ⅰ)the original inclusions from the electrode;(Ⅱ)the newly formed Ce2O2S and Ce2O3 inclusions in the liquid metal pool by reoxidation remaining still in remelted ingot;(Ⅲ)the newly generated Ce2O2S and Ce2O3 inclusions during cooling and solidification of liquid steel.The relative proportions of Ce2O3 inclusions in liquid metal pool and remelted ingot are 41％and 76.5％,respectively.The inclusions ranging from 2 to 5 μm in the remelted ingot take up 55％,followed by the inclusions smaller than 2 μm(43％of total inclusions).The number proportion of the Ce2O3 inclusions in the liquid metal pool which were removed by floating up into slag is 1.96 x 10-5％.

外文关键词：

Non-metallic inclusionElectroslag remeltingRare earth ceriumReoxidationInclusion evolution

作者：

Yu Zhao、Cheng-bin Shi、Shi-jun Wang、Peng Ren、Jing Li

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作者单位：

State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing(USTB),Beijing 100083,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaState Key Laboratory of Advanced Metallurgy

项目编号：

52074027522743145187402641623010

出版年：

2024

DOI：

10.1007/s42243-023-01092-3

钢铁研究学报(英文版)

钢铁研究总院

钢铁研究学报(英文版)

CSTPCD

影响因子：0.584

ISSN：1006-706X

年,卷(期)：2024.31(8)