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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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2018, Vol. 53 
