杨亚红,朱丽慧,姜筠,王起江,朱长春

• 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
• 3:宝钢特种材料有限公司

摘要(Abstract)：

采用扫描电镜和透射电镜观察了HR3C钢在650℃持久试验前后的微观组织,并探讨了持久过程中析出相变化对硬度的影响。结果表明:供应态HR3C钢的基体为奥氏体,存在大量孪晶及少量一次NbCrN和MX相。持久过程中析出二次触须状NbCrN和M23C6。持久初期,触须状NbCrN和M23C6的析出使得HR3C钢的硬度快速上升。持久1608 h后,不断增加的触须状NbCrN是硬度继续上升的主要原因。4203 h后,M23C6的粗化使得硬度开始下降。

关键词(KeyWords)： HR3C耐热钢;高温持久;组织;力学性能;强化机理

Abstract:

Keywords:

基金项目(Foundation): “十二五”国家科技支撑计划(2011BAK06B04);; 国家自然科学基金(51171097)

作者(Author): 杨亚红,朱丽慧,姜筠,王起江,朱长春

参考文献(References)：

• [1]于鸿垚,董建新,谢锡善.新型奥氏体耐热钢HR3C的研究进展[J].世界钢铁,2010,(2):42-61.YU Hong-yao,DONG Jian-xin,XIE Xi-shan.Research development of new austenitic heat-resistant steel HR3C[J].World Iron&Steel,2010,(2):42-61.
• [2]方园园,赵杰,李晓娜.HR3C钢高温时效过程中的析出相[J].金属学报,2010,46(7):844-849.FANG Yuan-yuan,ZHAO Jie,LI Xiao-na.Precipitates in HR3C steel aged at high temperature[J].Acta Metall Sinica,2010,46(7):844-849.
• [3]Iseda A,Okada H,Semba H,et al.Long term creep properties and microstructure of super304H,TP347HFG and HR3C for A-USC boilers[J].Energy Materials,2007,2(4):199-206.
• [4]Okada H,Igarashi M,Yamamoto S,et al.Long-term service experience with advanced austenitic alloys in Eddystone power station[C]∥Jaske C E.Proceedings of the ASME pressure vessels and piping conference,vol 9.New York:Amer Soc Mechanical Engineers,2008:181-188.
• [5]李太江,刘福广,陈伟武,等.HR3C钢焊接接头高温时效后的显微组织和力学性能[J].金属热处理,2012,37(8):16-20.LI Tai-jiang,LIU Fu-guang,CHEN Wei-wu,et al.Microstructure and mechanical properties of HR3C steel weld joints aged at high temperature[J].Heat Treatment of Metals,2012,37(8):16-20.
• [6]刘俊建,陈国宏,余新海,等.T92/HR3C异种钢焊接接头的组织结构和力学性能[J].材料热处理学报,2011,32(2):54-60.LIU Jun-jian,CHEN Guo-hong,YU Xin-hai,et al.Microstructure and mechanical properties of T92/HR3C dissimilar steel welding joints[J].Transactions of Materials and Heat Treatment,2011,32(2):54-60.
• [7]张忠文,李新梅,杜宝帅,等.650℃时效条件下HR3C钢焊缝金属组织与韧性[J].材料热处理学报,2011,32(4):104-109.ZHANG Zhong-wen,LI Xin-mei,DU Bao-shuai,et al.Microstructure and toughness of HR3C welded metal aged at 650℃[J].Transactions of Materials and Heat Treatment,2011,32(4):104-109.
• [8]Peng B C,Zhang H X,Hong J,et al.Effect of aging on impact toughness of 25Cr-20Ni-Nb-N steel[J].Materials Science and Engineering A,2010,527(7):1957-1961.
• [9]Peng B C,Zhang H X,Hong J,et al.The effect of M23C6on the high-temperature tensile strength of two austenitic heat-resistant steels:22Cr-25Ni-MoNb-N and 25Cr-20Ni-Nb-N[J].Materials Science and Engineering A,2011,528(10):3625-3629.
• [10]雍岐龙.钢铁材料中的第二相[M].北京:冶金工业出版社,2006.

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