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题名: Effects of Mn on the mechanical properties and high temperature oxidation of 9Cr2WVTa steel
作者: Jin, Xiaojie;  Chen, Shenghu;  Rong, Lijian
发表日期: 2017-10-1
摘要: The mechanical properties and high temperature oxidation behaviors of 9Cr2WVTa steels with Mn contents in the range of 0.04-0.93 wt% were investigated. There are no obvious differences in the tensile properties at room temperature and high temperature, only a slight reduction in the impact toughness when Mn content reaches 0.93 wt%. Remarkably, the high temperature oxidation resistance is significantly improved with an increase of Mn content. After 500 h of oxidation, a ( Fe0.6Cr0.4)(2)O-3 oxide scale is developed on the steel with 0.04 wt% Mn, Mn1.5Cr1.5O4 oxides are occasionally detected when Mn content reaches 0.47 wt%, while a thin compact scale with a mixture of Mn1.5Cr1.5O4 and Cr1.3Fe0.7O3 oxides is formed on the steel containing 0.93 wt% Mn. Addition of Mn promotes the formation of Mn-oxides, which lowers oxygen partial pressure and accelerates external oxidation of Cr. At last, the presence of Mn-Cr spinels and Cr-rich oxides improves the oxidation resistance. (C) 2017 Elsevier B.V. All rights reserved.
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Recommended Citation:
Jin, Xiaojie,Chen, Shenghu,Rong, Lijian. Effects Of Mn On The Mechanical Properties And High Temperature Oxidation Of 9cr2wvta Steel[J]. Elsevier Science Bv,2017,494:103-113.

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