尚丽娟,田素贵,王晓亮,张特,陈礼清

• 1:沈阳工业大学材料科学与工程学院
• 2:东北大学轧制技术及连轧自动化国家重点实验室

摘要(Abstract)：

通过蠕变曲线测定及组织形貌观察,研究了403Nb钢的蠕变性能特点、变形特征、组织及其变化规律。结果表明:403Nb钢具有明显的温度敏感性,在试验条件下,403Nb钢蠕变激活能为463 kJ/mol,组织为回火板条马氏体,相邻马氏体板条组间取向几乎垂直。在马氏体中存在高密度的位错和尺寸约0.2μm的残留NbC,在马氏体板条界,特别是晶界处沉淀大量更为细小的纳米Cr23C6。蠕变期间,NbC十分稳定,但晶界处(Cr,Fe)23C6部分向(Cr,Fe)7C3转变。403Nb钢的蠕变变形机制是晶界滑移、位错滑移及由位错增值束集引起的动态再结晶,对上述过程碳化物起到阻碍作用,提高了钢的蠕变抗力。

关键词(KeyWords)： 耐热钢;403Nb钢;微观组织;蠕变性能;变形机理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50634030)

作者(Author): 尚丽娟,田素贵,王晓亮,张特,陈礼清

DOI: 10.13289/j.issn.1009-6264.2011.08.015

参考文献(References)：

• [1]Semba H,Dyson B,Mclean M.Microstructure-based creep modelling of a 9%Cr martensitic steel[J].Materials at High Temperatures,2008,25(3):131-137.
• [2]王学,潘乾刚,陈方玉,等.P92钢高温蠕变损伤分析[J].材料热处理学报,2010,31(2):65-69.WANG Xue,PAN Qian-gang,CHEN Fang-yu,et al.Analysis of creep damage at elevated temperature in a P92 steel[J].Transactions of Materials andHeat Treatment,2010,31(2):65-69.
• [3]Dimmler G,Weinert P,Kozeschnik E,et al.Quantification of the laves phase in advanced 9～12%Cr steels using a standard SEM[J].MaterialsCharacterization,2003,51:341-352.
• [4]Sonderegger B,Mitsche S,Cerjak H.Martensite laths in creep resistant martensitic 9～12%Cr steels-calculation and measurement of misorientations[J].Materials Characterization,2007,58(10):874-882.
• [5]Hald J.Metallurgy and creep properties of new 9～12%Cr steels[J].Steel Research,1996,67(9):369-374.
• [6]Rohr V,Schutze M,Fortuna E,et al.Development of novel diffusion coatings for 9～12%Cr ferritic-martensitic steels[J].Materials and Corrosion,2005,56(12):874-881.
• [7]Montgomery M,Jensen S A,Rasmussen F,et al.Fireside corrosion and steamside oxidation of 9～12%Cr martensitic steels exposed for long termtesting[J].Corrosion Engineering Science and Technology,2009,44(3):196-210.
• [8]Abe F.Coarsening behavior of lath and its effect on creep rates in tempered martensitic 9Cr-W steels[J].Materials Science and Engineering A,2004,387-389:565-569.
• [9]王立民,宁小智,刘宁,等.热变形403Nb钢的再结晶动力学[J].材料热处理学报,2010,31(1):57-61.WANG Li-min,NING Xiao-zhi,LIU Ning,et al.Recrystallization kinetics of hot deformed 403Nb steel[J].Transactions of Materials and HeatTreatment,2010,31(1):57-61.
• [10]刘宁,王立民,张秀丽,等.固溶温度对403Nb钢组织和性能的影响[J].特钢技术,2007,13(3):21-24.LIU Ning,WANG Li-min,ZHANG Xiu-li,et al.Effect of solid solution temperature on structure and properties of 403Nb steel[J].Special SteelTechnology,2007,13(3):21-24.
• [11]尚丽娟,伦建伟,陈礼清,等.热连轧403Nb棒材的组织结构与蠕变性能[J].沈阳工业大学学报:自然科学版,2010,32(1):45-49.SHANG Li-juan,LUN Jian-wei,CHEN Li-qing et al.Microstructures and creep properties of hot continuous rolled 403Nb bar[J].Journal of ShenyangUniversity of Technology:Natural Science Edition,2010,32(1):45-49.

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