摘要
为了分析针状铁素体组织的形貌特点,进行了金相光学显微镜和扫描电子显微镜(SEM)观察.通过金相光学显微组织观察,发现了具有相同生长方向的针状铁素体组织和类似于在夹杂物形核的现象.通过SEM观察到不同晶界处形核的特点不同,在平直晶界处形核长大的针状铁素体组织比大曲率晶界处的组织更具规则性.测量出针状铁素体组织的维氏硬度约为377HV3.并指出维氏硬度值不能准确反映针状铁素体显微组织的本征硬度.
The metallographic optical microscope and scanning electron microscope （SEM） were applied to analyze the morphology of acicular ferrite microstructures. Acicular ferrite microstructures with the same growth directions and nucleation of acicular ferrite in inclusions were identified. Distinct characteristics of nucleation of acicular ferrite at different grain boundaries were also discovered through the SEM. Nucleation and growth of acicular ferrite at straight grain boundaries were more regular than at large cur vature grain boundaries. Vickers hardness of acicular ferrite microstructures measured was about 377 HV3, but the value of Vickers hardness could not accurately reflect the intrinsic hardness in the theoretical analysis.
出处
《甘肃科学学报》
2014年第3期55-58,共4页
Journal of Gansu Sciences
关键词
针状铁素体
形核
维氏硬度
Acicular ferrite
Nucleation
Vickers hardness
