王俪篥,朱丽慧,王起江

• 1:上海大学上海市现代冶金及材料制备重点实验室
• 2:宝山钢铁股份有限公司

摘要(Abstract)：

Super 304H是在18Cr-8Ni钢基础上通过加入Cu、Nb、N开发的具有极高持久强度的新型耐热钢。利用光学显微镜、扫描电镜、透射电子显微镜以及X射线衍射仪分析了Super 304H钢供应状态、650℃持久试样的微观组织。通过研究Super 304H钢持久过程中析出相尤其是ε-Cu的变化情况,探讨了其对持久强度的影响。结果表明,该钢中存在大量细小的ε-Cu,长期蠕变后粗化程度很小。计算结果表明ε-Cu的沉淀强化作用占Super 304H钢650℃时持久强度的30%以上,是Super 304H钢具有高持久强度的主要原因。供应状态下析出的大量细小Nb(C,N)和蠕变过程中析出的M23C6和NbCrN尺寸较为细小时,对该钢持久强度的提高也有一定作用。

关键词(KeyWords)： Super304H钢;ε-Cu;蠕变;沉淀强化;持久强度

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 王俪篥,朱丽慧,王起江

DOI: 10.13289/j.issn.1009-6264.2011.06.024

参考文献(References)：

• [1]Elarbi Yousef,Palotas Bela.Contributions of different factors to the improvement of the creep rupture strength of creep resistant martensitic steels[J].Periodica Polytechnica Mechanical Engineering,2007,51(1):33-38.
• [2]Dieter Isheim,Semyon Vaynman,Morris E Fine,et al.Copper-precipitation hardening in a non-ferromagnetic face-centered cubic austenitic steel[J].Scripta Materialia,2008,59(12):1235-1238.
• [3]Tsuchiyama T,Futamura Y,Takaki S.Strengthening of heat resistant martensitic steel by Cu addition[J].Key Engineering Materials,2000,171-174:411-418.
• [4]Fujimitsu Masuyama.History of power plants and progress in heat resistant steels[J].ISIJ International,2001,41(6):612-625.
• [5]孙玉梅,邹小平.Super304H不锈钢锅炉管评述[J].锅炉技术,2007,38(1):52-56.SUN Yu-mei,ZOU Xiao-ping.The comment of super 304H stainless steel boiler tube[J].Boiler Technology,2007,38(1):52-56.
• [6]Sawaragi Y,Hirano S.Development of a new 18-8 austenitic stainless steel(0.1C-18Cr-9Ni-3Cu-Nb-N)with high elevated temperatures strength forfossil power boilers[C]//Mechanical Behaviour of Materials.Tarrytown,NY,USA:Pergamon Press Inc,1992,589-594.
• [7]杨岩,程世长,杨钢.铜含量对Super304H钢持久性能的影响[J].机械工程材料,2002,26(10):23-25.YANG Yan,CHENG Shi-chang,YANG Gang.Effect of Cu addition on the creep rupture properties of Super 304H steel[J].Materials for MechanicalEngineering,2002,26(10):23-25.
• [8]Hakcheol Lee,H.J.Koh,Chang-Hyo Seo,et al.Microstructure and tensile properties of hot-rolled Fe-C-Mn-Si-Cu multiphase steel[J].ScriptaMaterialia,2008,59(1):83-86.
• [9]Deschamps A,Militzer M,Poole W J.Precipitation kinetics and strengthening of a Fe-0.8wt%Cu Alloy[J].ISIJ International,2001,41(2):196-205.
• [10]KobayashiS,Nakai K,Ohmori Y.Isothermal decomposition ofδ-Ferrite in a 25Cr-7Ni-0.14N stainless steel[J].Acta Materialia,2001,49(11):1891-1902.
• [11]Othen P J,Jenkins M Lm,Smith G D W,et al.Transmission electron microscope investigations of the structure of copper precipitates in thermally-agedFe-Cu and Fe-Cu-Ni[J].Philosophical Magazine Letters,1991,64(6):383-391.
• [12]YOO J Y,CHOO W Y,PARK T W,et al.Microstructures and age hardening characteristics of direct quenched Cu bearing HSLA steel[J].ISIJInternational,1995,35(8):1034-1040.
• [13]Kazushi Hamada,Kazushige Tokuno,Yukio Tomita,et al.Effects of precipitate shape on high temperature strength of modified 9Cr-1Mo steels[J].ISIJInternational,1995,35(1):86-91.
• [14]Scattergood R O,Bacon D J.Strengthening effect of voids[J].Acta Materialia,1982,30(8):1665-1677.

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