Super304H奥氏体不锈钢高温下组织与性能演变的研究进展

Research Progress on High-Temperature Microstructure and Property Evolution of Super304H Austenitic Stainless Steel

摘要: Super304H(18Cr-9Ni-3Cu-Nb-N)奥氏体不锈钢常作为超超临界锅炉过热器和再热器管道的首选材料。从化学成分对显微组织和性能的影响、析出相析出机理、组织对高温性能的影响三方面综述了目前Super304H钢高温下组织和性能演变的研究进展, 提出了今后Super304H钢高温组织和性能演变的主要研究方向。

Abstract: Super304H(18Cr-9Ni-3Cu-Nb-N) austenitic stainless steel is generally used as a preferred material for superheater and reheater tubes in ultra-supercritical boiler. The research progress on the high-temperature microstructure and property evolution of Super304H steel is summarized in terms of the influence of chemical composition on microstructure and properties, the mechanism of precipitates and the influence of the microstructure on high-temperature properties. The further research direction of the high-temperature microstructure and property evolution of Super304H steel is also proposed.