沈喜训,高加强,王国栋,刘俊亮,王起江

• 1:上海电力学院环境与化学工程学院
• 2:宝山钢铁股份公司研究院

摘要(Abstract)：

以不添加Co和添加3%Co的高铬(12%Cr)铁素体钢为模型钢,观察并研究了Co元素对高铬(12%Cr)铁素体钢的组织和蠕变特性及断裂方式的影响。结果表明,Co的添加扩大奥氏体形成区,有效地抑制了高温δ-铁素体相的形成,并提高了奥氏体晶粒度;在140 MPa和650℃下,Co的添加使铁素体钢的蠕变断裂时间从1172 h提高到1620 h;不含Co试验钢的断口呈现均匀的韧窝结构,而3%Co试验钢的断口呈现典型的双峰尺寸的韧窝结构。这种组织上的优化和钴的固溶强化有效地抑制了回火马氏体组织的回复和再结晶,延缓了沿界面分布的M23C6型碳化物的聚集粗化和Fe2(W,Mo)新相的形成,从而提高铁素体钢的蠕变抗力。

关键词(KeyWords)： 铁素体钢;钴;板条马氏体;蠕变;析出相

Abstract:

Keywords:

基金项目(Foundation): 上海市科委项目(09521101200)

作者(Author): 沈喜训,高加强,王国栋,刘俊亮,王起江

DOI: 10.13289/j.issn.1009-6264.2013.12.013

参考文献(References)：

• [1]Beér M J.High efficiency electric power generation:the environmental role[J].Prog Energy Combust Sci,2007,33(2):107-115.
• [2]Choudhary B K,Phaniraj C,Bhanu S,et al.Creep deformation behaviour and kinetic aspects of 9Cr-1Mo ferritic steel[J].ISIJ International,2001,41:S73-S80.
• [3]Sakakibara M,Masumoto H.Ogawa T,et al.High strength 9Cr-0.5Mo-1.8W steel(NF616)tubes for boilers[J].Thermal and Nuclear Power,1987,38:841-850.
• [4]Cerjak H,Letofsky E,Feigl G et al.Materials for Advanced Power Engineering[M].Part I,edited by Lecomte-Beckers J,et al,Forschungszentrum,Jülich,GmbH,1998:1211-1221.
• [5]Iseda A,Sawaragi Y,Kato S,et al.Creep:characterization,damage and life assessment[C]∥Proc 5th Int Conf Creep of Materials,ASM Int,Metal Park,OH,1992:389-293.
• [6]Yamada K,Igarashi M,Muneki S,et al.Effect of Co addition on microstructure in high Cr ferritic steels[J].ISIJ International,2003,43(9):1438-1443.
• [7]Ohgami M,Hasegawa Y,Naoi H,et al.Development of 11CrMoCo heat resistant steel for fossil thermal plants[C]∥IMechE Conf Trans,1997-2,Advanced Steam Plant,IMechE,London,1997:115-125
• [8]Igarashi M,Sawaragi Y.Development of 0.1C-11Cr-3W-3Co-V-Nb-Ta-Nd-N Ferritic Steel for USC Boilers[C]∥Proc Int Conf Power Engineering-97(ICOPE-97),Japan Society of Mechnical Engineers,Tokyo,Japan,1997:107-112.
• [9]沈喜训,刘俊亮,沈巍.铜对高铬(12%Cr)铁素体钢的组织和蠕变特性的影响[J].机械工程材料,2012,36(4):12-16.SHEN Xi-xun,LIU Jun-liang,SHEN Wei.Effect of Cu content on microstructure and creep property of high chromium ferric steels[J].Materials for Mechanical Engineering,2012,36(4):12-16.
• [10]沈喜训,刘俊亮,徐洲.V和Nb对12%Cr铁素体钢微观组织和蠕变特性的影响[J].钢铁,2012,47(9):68-73.SHEN Xi-xun,LIU Jun-liang,XU Zhou.Effect of V and Nb on the microstructure and creep property of high chromium(12%Cr)ferric steel[J].Iron and Steel,2012,47(9):68-73.
• [11]Frost H J,Ashby M F.Deformation Mechanism Maps[M].Oxford:Pergamon Press,1982:21-23.
• [12]Dimmlerg,Weinert P,Kozeschnik E,et al.Quantification of the Laves phase in advanced 9-12%Cr steels using a standard SEM[J].Materials Characterization,2003,51(5):341-352.
• [13]Fujio A,Torsten U,Viswanathan R.Creep-Resistant Steels[M].New York:CRC press,2008:35-38.

文章评论(Comment)：