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Evolution of inclusions in solid stainless steels during heat treatment process |
CHEN Wei-ben1,2,REN Ying1,XU Hai-kun1,WANG Wen-bo1,ZHANG Li-feng1 |
(1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China 2. Refining Plate, Baosteel Desheng Stainless Steel Co., Ltd., Fuzhou 350601, Fujian, China) |
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Abstract The evolution of inclusions in Si-Mn-killed 18Cr-8Ni stainless steels during the heat treatment was analyzed using Aspex inclusions analyzer and Field Emission SEM. During the heat treatment at 1 200 ℃ under an argon atmosphere,the [Cr] in the solid steel matrix reduces the SiO2 and MnO in MnO-SiO2-rich inclusions,and formed MnO·Cr2O3 spinel on the surface of MnO-SiO2-rich core phase. Finally,MnO-SiO2-rich inclusions were fully modified to pure MnO·Cr2O3 spinel in Si-Mn-killed stainless steels. Moreover,the formation and evolution of inclusions were calculated using FactSage,which can provide a theoretical explanation for the experimental results.
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Received: 18 April 2018
Published: 26 October 2018
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