金属学报  1997, Vol. 33 Issue (3): 287-291

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20Cr11MoVNbNB钢蠕变孔洞及蠕变裂纹的研究

符长璞;符亚林;陈宇航

西安理工大学;西安;710048;西安理工大学;西安;710048;西安理工大学;西安;710048

CREEP CAVITIES AND CREEP CRACKS IN STEEL 20Cr11MoVNbNB

FU Changpu; FU Yalin; CHEN Yuhang (Xi'an University of Science and Technology;Xi'an 710048)

符长璞;符亚林;陈宇航. 20Cr11MoVNbNB钢蠕变孔洞及蠕变裂纹的研究[J]. 金属学报, 1997, 33(3): 287-291.
, , . CREEP CAVITIES AND CREEP CRACKS IN STEEL 20Cr11MoVNbNB[J]. Acta Metall Sin, 1997, 33(3): 287-291.

摘要 参考文献 相关文章 Metrics 全文: PDF(2256 KB)   摘要: 研究了20Cr11MoVNbNB马氏体热强钢在550—65℃范围内蠕变孔洞的形成及蠕变裂纹的发展发现蠕变孔洞主要在原奥氏体晶界和原板条马氏体边界上的淬火未溶大颗粒Nb（C，N）及M23C6碳化物处形成，孔洞在原奥氏体晶界形成倾向不占优势：蠕变裂纹沿垂直应力方向横穿原奥氏体晶界及原板条马氏体边界向晶内扩展，最终导致穿晶断裂. 关键词 ： 20Cr11MoVNbNB钢,  蠕变孔洞,  蠕变裂纹,  穿晶断裂     Abstract：Studies were made on the nucleation of creep cavities and propagation of creep cracks in steel 20Cr11MoVNbNB at 550-650℃. Results show that creep cavities are mainly nucleated at the big particles of undissolved Nb (C, N) and M23C6 carbides, both of which exist at prior austenite grain boundaries and lath martensite boundaries. It is also found that creep creacks crossed the prior austenite grain boundaries and lath martensite boundaries along the direction normal to applied stress, propagated into the grains, and finally leaded to the transgranular fracture. Key words： steel 20Cr11MoVNbNB    creep cavity    creep crack    transgranular fracture 收稿日期: 1997-03-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 符长璞 符亚林 陈宇航 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1997/V33/I3/287 1Larson F R,Miller J.Trans ASME.1952;74:765 2符长璞.钢铁,1994;29(1):34 3Kadoya Y,Goto T.ISIJ Int.1990;30:829 4符长璞.金属学报,1991;27:A427 5符长璞.金属热处理,1992;(3):21 6张金旺,符长璞.机械上程学报,1992: 28(3): 65 7 Smith E.Met Sci,1967; 2(1):1 8 Rukweid A Metall Trans,1972;3:3009 9 Cane B J.Met Sci,1976;10(1):2 10 Londale D,Flewitt P E Mater Sci Eng,1979;39:217 11符长噗.钢铁,1992; 27(6):36 12刘荣藻.低合金热强钢的强韧化机理.北京:冶金工业出版社,1981:172| [1] 孙坚;张源虎;胡赓祥. 两种组织的Ren80高温合金的蠕变裂纹扩展行为[J]. 金属学报, 1993, 29(4): 37-40. [2] 符长璞;张金旺;潘景达;杜文峰. 20Cr11MoVNbNB钢强度曲线出现转折的原因[J]. 金属学报, 1991, 27(6): 33-38. [3] 张源虎;项毅;孙坚;胡赓祥;李铁藩. 不同晶界形态高温合金在含硫环境中的蠕变和断裂特性[J]. 金属学报, 1990, 26(5): 44-49. [4] 郭恩才;徐凤琴. 少量Mg和Zr对一种Ni-Cr-Ti型变形合金蠕变裂纹长大行为的影响[J]. 金属学报, 1988, 24(5): 366-372. Viewed Full text Abstract Cited   Shared      Discussed