Studies on the Oxidation Behavior and Microstructural Evolution of Two Nb-Modified HR3C Austenitic Steels under Pure Water Vapor at 650 °C

Materials

卷:13

Dongxu Yang¹  Minghui Chen²  Fuhui Wang²  Jinlong Wang²  Qunchang Wang²  Bo Meng²  Yongli Zhou³  Jintao Lu³ 

[1] Liaoning Non-ferrous Geological Exploration and Research Institute Co., Ltd., Shenyang 110819, China;

[2] Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China;

[3] State Key Laboratory of Coal-Based Clean Energy, Xi’an Thermal Power Research Institute Co., Ltd., Xi’an 710032, China;

关键词: austenitic stainless steel;    steam oxidation;    oxidation behavior;    microstructural evolution;   

DOI  :  10.3390/ma13235447

来源: DOAJ

【 摘 要 】

The steam oxidation behavior of three heterogeneous HR3C alloys was investigated at 650 °C comparatively. After a long-term oxidation process for 1000 h, the results demonstrated that the commercial HR3C alloy already exhibited a high oxidation resistance. However, the spallation resistance of the oxide scale was low during the initial oxidation period. The addition of a moderate amount of Nb into the alloy (1#HR3C) increased the oxidation resistance of the alloy. In addition, the improvement of the microstructural stability was substantially influenced by solid solution strengthening and fine grain strengthening. However, the addition of excessive Nb could significantly affect the growth model of the oxide scale and negatively affect the oxidation performance and microstructural evolution of the alloy (2#HR3C).

【 授权许可】

Unknown