微合金钢中析出相形核过程的三维原子探针研究  

INVESTIGATION OF THE PRECIPITATION PROCESS IN MICRO-ALLOYED STEEL WITH THREE-DIMENSIONAL ATOM PROBE

作　　者：吴静[1] 张恒华[1] 朱松鹤[1] 彭晟[1] 刘文庆[1] 许珞萍[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海金属》2009年第3期36-39,共4页Shanghai Metals

基　　金：先进钢铁材料技术国家工程研究中心课题(D.09-0110-07-005)

摘　　要：应用透射电镜和三维原子探针研究了Nb-V微合金钢在不同处理工艺时的形核过程。控轧控冷(TMCP)钢样品的透射电镜的结果表明出现了(Nb,V)(C,N),大小为几十纳米。三维原子探针的检测结果显示控轧控冷钢样品未出现纳米尺寸的碳氮化物团簇,而淬火钢样品中出现纳米级NbC团簇,经回火的样品中(Nb,V)C和VN团簇最为明显。Transmission electron microscopy and three-dimensional atom probe were used to analyze the precipitation process of Nb-V micro-alloyed steel during different treating processes. The TEM results showed there existed （ Nb, V） （ C, N） particles with dozens nanometer in Thermo-Mechanical Control Process （TMCP） samples. The results of 3DAP showed inexistence of carbonitride cluster with nanometer in TMCP sample, but few NbC cluster was found in the quenched sample, and a good few cluster of （Nb,V）C and VN were found in the tempered sample.

关 键 词：NbV微合金钢 形核过程 碳氮化物 三维原子探针 

分 类 号：TG142.33[一般工业技术—材料科学与工程] TG115.215[金属学及工艺—金属材料]