摘要
对Nb-V微合金钢进行模拟控轧控冷试验,利用光学显微镜、场离子显微镜、三维原子探针等测试分析技术和手段,研究铁素体基体中碳化物析出早期阶段的特点.用三维原子探针研究基体中碳化物的析出过程,发现在NbC析出初期,C和Nb原子在铁素体同一个(001)原子面上发生偏聚,且质量分数都不到5%,认为这是在基体中形成的G.P.区.
By applying the techniques of optical microscope, field ion microscope (FIM) and three-dimensional atom probe (3 DAP) , the carbides precipitated from ferrite matrix on the early stage of niobium and vanadium micro-alloyed steels were characterized. 3DAP was carried out to investigate the carbides precipitate process in niobium and vanadium micro-alloyed steels. Niobium and carbon atoms segregating at a ferrite matrix (001) plane and the concentration of less than 5% were observed in the matrix during the initial precipitating stages of NbC. The monolayer enrichment zone of niobium and carbon atoms was considered as G.P. zone.
出处
《江苏大学学报(自然科学版)》
EI
CAS
北大核心
2008年第2期131-133,共3页
Journal of Jiangsu University:Natural Science Edition
基金
上海市科委纳米专项(0552nm049)
关键词
微合金钢
G.P.区
三维原子探针
NbC析出
偏聚
micro-alloyed steel
G.P. zone
three-dimensional atom probe (3DAP)
NbC precipitate
segregate