采用光学显微镜、扫描电子显微镜和透射电子显微镜等,对某火电厂超超临界机组正常服役10000 h后锅炉用Super304H过热器管不同区域的显微组织和力学性能进行了分析.结果表明:未服役的Super304H过热器管中均匀弥散分布着纳米级析出相,晶界上没有析出相的聚集,具有良好的高温强度和塑性；服役后过热器管晶粒粗化,晶界处存在大量连续分布的M23C6相和粗大的Nb(C,N)相,材料的塑性明显下降.
参考文献
| [1] | 杨富,李为民,任永宁.超临界、超超临界锅炉用钢[J].电力设备,2004(10):41-46. |
| [2] | Sim GM;Ahn JC;Hong SC;Lee KJ;Lee KS .Effect of Nb precipitate coarsening on the high temperature strength in Nb containing ferritic stainless steels[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2005(1/2):159-165. |
| [3] | 王起江,洪杰.超超临界电站锅炉用新型管材的研制[J].宝钢技术,2008(05):44-48,53. |
| [4] | 刘保国,杨必应.电站锅炉几种常见钢材的金相组织分析[J].广西轻工业,2009(05):18-19,39. |
| [5] | Yousef Elarbi;Bela Palotas .Contributions of different factors to the improvement of the creep rupture strength of creep resistant martensitic steels[J].Periodica Polytechnica. Mechanical Engineering,2007(1):33-38. |
| [6] | Dieter Isheim;Semyon Vaynman;Morris E. Fine .Copper-precipitation hardening in a non-ferromagnetic face-centered cubic austenitic steel[J].Scripta materialia,2008(12):1235-1238. |
| [7] | 陈国安,杨王玥,郭守真,孙祖庆.低碳微量铌钢形变强化相变的组织演变[J].金属学报,2004(10):1079-1084. |
| [8] | 付俊岩.Nb微合金化和含铌钢的发展及技术进步[J].钢铁,2005(08):1-6,25. |
| [9] | 袁立中,宋仁明.SA213-Super304H、HR3C钢焊接工艺评定试验[J].青海电力,2009(02):26-29. |
| [10] | 孙玉梅,邹小平.Super304H不锈钢锅炉管评述[J].锅炉技术,2007(01):52-55. |
| [11] | M.A. Islam;M.M.A. Bepari .Effects of Niobium Additions on the Structure, Depth, and Austenite Grain Size of the Case of Carburized 0.07 percent C Steels[J].Journal of Materials Engineering and Performance,1996(5):593-597. |
| [12] | 郑子杰.HR3C钢管时效冲击韧性大幅降低的原因分析[J].锅炉技术,2011(04):46-48,69. |
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