摘要
以SWRS82B盘条钢为研究对象,研究了钒元素对高碳钢在连续冷却条件下索氏体形核的影响规律,采用光学显微镜、SEM及能谱对索氏体形核过程进行了观测和分析。研究发现,索氏体的形核位置主要是在V、S元素的富集区域。V的加入增大了渗碳体的形核驱动力,具有B1结构的VC会在同样B1结构的非共格MnS界面析出,VC的析出造成其附近区域出现局部贫碳区,连续冷却过程中由低能的索氏体/析出相界面取代奥氏体/析出相界面,索氏体团在MnS+VC复杂析出相的VC界面形核。
Effect of vanadium on the nucleation of sorbite in a SWRS82B high-carbon steel during continuous cooling transformation was studied.The nucleation sites of sorbite in the vabadiun microalloyed SWRS82B high-carbon steel was examined by SEM observation and EDS analysis.The results show that the sorbite nucleates in the zones rich in vanadium and sulfur in the high-carbon steel containing vanadium.Addition of vanadium raised the phase transformation driving force of cementite.The incoherent MnS inclusion with B1 structure provides the nucleation sites for VC（B1） precipitation.The formation of VC causes the C-depleted zone,and the high energy interface between inclusion and austenite is replaced by low energy interface between inclusion and sorbite during continuous cooling.The sorbite nucleates on VC precipitates of MnS/VC complex precipitate.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2010年第12期66-70,共5页
Transactions of Materials and Heat Treatment
基金
国家科技支撑计划(2007BAE16B01)
贵州省科学技术基金([2009]2231)
贵州大学引进人才科研项目(2009-014)
关键词
高碳盘条钢
索氏体形核
钒元素
high-carbon wire rod steel
sorbite nucleation
vanadium
