两种铌改性HR3C奥氏体钢在650℃纯水蒸气下的氧化行为及微观结构演变研究

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

作者信息

Wang Jinlong, Meng Bo, Lu Jintao, Zhou Yongli, Yang Dongxu, Wang Qunchang, Chen Minghui, Wang Fuhui

机构信息

Shenyang National Laboratory for Materials Science, Northeastern University, Shenyang 110819, China.

State Key Laboratory of Coal-Based Clean Energy, Xi'an Thermal Power Research Institute Co., Ltd., Xi'an 710032, China.

出版信息

Materials (Basel). 2020 Nov 29;13(23):5447. doi: 10.3390/ma13235447.

DOI:10.3390/ma13235447

PMID:33260482

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7730653/

Abstract

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).

摘要

对三种不同的HR3C合金在650℃下的蒸汽氧化行为进行了对比研究。经过1000小时的长期氧化过程，结果表明商用HR3C合金已经表现出高抗氧化性。然而，在初始氧化阶段，氧化皮的抗剥落性较低。向合金中添加适量的Nb（1#HR3C）提高了合金的抗氧化性。此外，微观结构稳定性的提高主要受固溶强化和细晶强化的影响。然而，过量添加Nb会显著影响氧化皮的生长模式，并对合金（2#HR3C）的氧化性能和微观结构演变产生负面影响。