铌-钒微合金钢中碳氮化合物的析出特点
PRECIPITATION CHARACTERIZATION OF CARBONITRIDE IN Nb-V MICROALLOYED STEEL
摘 要
用三维原子探针分析了Nb-V微合金钢中析出相的特征,发现不同大小的析出团簇成分有较大的差异。结果表明:碳原子首先在位错等缺陷处偏聚,然后钒和铌原子依次向碳原子偏聚处聚集,先后形成V-C和V-Nb-C原子团簇,进而发展成 (Nb,V)C复合相,并随着其进一步长大,成分出现不均匀。当合金中存在氮元素时,也会形成(Nb,V)(N,C)复合相。
碳氮化物
析出
三维原子探针
micro-alloyed steel
carbonitrides
precipitate
three-dimensional atom probe
Abstract
Three-dimen sional atom probe(3DAP) was employed to investigate carbonitride clusters in Nb-V micro-alloyed steels. There are great differences in compositions of these clusters with difference sizes. The results indicated that the carbon atoms congregated at the dislocation first,the vanadium and niobium atoms segregated to the place in turn,V-C and V-Nb-C clusters came into being successively,and finally (Nb,V)C complex phase was formed. The composition becomes asymmetry as the precipitates grow up. If nitrogen element exist,compound phase (Nb,V)(N,C) will be formed.
中图分类号 TG113.25
所属栏目 试验与研究
基金项目 上海市纳米专项（0552nm049)
收稿日期 2007/12/7
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备注刘文庆(1968-),男,研究员,博士。
引用该论文: LIU Wen-qing,ZHU Yu-liang,WANG Ze-min,LI Cong,FANG Shu-fang,ZHOU Bang-xin. PRECIPITATION CHARACTERIZATION OF CARBONITRIDE IN Nb-V MICROALLOYED STEEL[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2008, 44(10): 540～543
刘文庆,褚玉良,王泽民,李 聪,方淑芳,周邦新. 铌-钒微合金钢中碳氮化合物的析出特点[J]. 理化检验－物理分册, 2008, 44(10): 540～543
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参考文献
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【3】黄 杰,徐 洲. V-Ti微合金钢热变形过程中复合微合金析出相的形成机制[J]. 上海金属,2005,27(6):12-15．
【4】Pereloma E V,Timokhina I B,Russell K F,et al. Characterization of clusters and ultrafine precipitates in Nb-containing C-Mn-Si steels[J]. Scripta Materialia,2006,54: 471-476．
【5】Pereloma E V,Shekhter A,Miller M K,et al. Ageing behaviour of an Fe-20Ni-1.8Mn-1.6Ti-0.59Al (wt %) maraging alloy: clustering,precipitation and hardening[J]. Acta Materialia,2004,52:5589-5602．
【6】Timokhina I B,Hodgson P D,Ringer S P,et al. Precipitate characterization of an advanced high-strengthlow-alloy (HSLA) steel using atom probe tomography[J]. Scripta Materialia,2007,56: 601-604．
【7】刘文庆,周邦新.场离子显微镜和原子探针.中国材料工程大典[M]. 北京: 化学工业出版社,2006: 1045-1052．
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【9】Uemori R,Chijiiwa R,Tamehiro H. AP-FIM analysis of ultrafine carbonitrides in fire-resistant steel for building construction[C]// Nippon Steel Technical Report. Tokyo:\[s.n\]1996:23-28．
【10】Isheim D,Gagliano M S,Fine M E,et al. Interfacial segregation at Cu-rich precipitates in a high-strength low-carbon steel studied on a sub-nanometer scale [J]. Acta Materialia,2006,54: 841-849．
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