Liu Ling, Fan Cuilin, Sun Hongying, Chen Fuxiao, Guo Junqing, Huang Tao
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471000, China.
School of Mechanical Engineering, Anyang Institute of Technology, Anyang 455000, China.
Materials (Basel). 2022 May 13;15(10):3515. doi: 10.3390/ma15103515.
The development of Alumina-Forming Austenitic (AFA) stainless steel is reviewed in this paper. As a new type of heat-resistant steel, AFA steel forms an alumina protective scale instead of chromia in a corrosive environment. This work summarizes the types of developed AFA steels and introduces the methods of composition design. Various precipitates appear in the microstructure that directly determine the performance at high temperatures. It was found that alloy elements and the heat treatment process have an important influence on precipitates. In addition, the corrosion resistance of AFA steel in different corrosive environments is systematically analyzed, and the beneficial or harmful effects of different elements on the formation of alumina protective scale are discussed. In this paper, the short-term mechanical properties, creep properties and influencing factors of AFA steel are also analyzed. This work aims to summarize the research status on this subject, analyze the current research results, and explore future research directions.
本文综述了氧化铝形成奥氏体(AFA)不锈钢的发展情况。作为一种新型耐热钢,AFA钢在腐蚀环境中形成氧化铝保护氧化皮而非氧化铬。这项工作总结了已开发的AFA钢的类型,并介绍了成分设计方法。微观结构中出现的各种析出物直接决定了高温性能。研究发现合金元素和热处理工艺对析出物有重要影响。此外,系统分析了AFA钢在不同腐蚀环境中的耐腐蚀性,并讨论了不同元素对氧化铝保护氧化皮形成的有益或有害影响。本文还分析了AFA钢的短期力学性能、蠕变性能及影响因素。这项工作旨在总结该主题的研究现状,分析当前的研究成果,并探索未来的研究方向。