铁素体球铁中VC的粒度分布和作用  

SIZE DISTRIBUTION AND BEHAVIOUR OF VC PARTICLES IN FERRITIC NODULAR CAST IRON

作　　者：王禹[1] 宋维锡 韩其勇[2] 

机构地区：[1]北京科技大学院内海淀区精特新材料研究所,工程师北京100083 [2]北京科技大学

出　　处：《金属学报》1992年第9期B389-B394,共6页Acta Metallurgica Sinica

摘　　要：采用超声波筛分、X射线小角散射及化学溶解等方法,分析了铁素体球铁中VC的粒度分布和析出规律。结果表明:VC的粒子直径有很宽的分布范围,但超细VC占粒子总数的绝大部分;超细VC弥散分布于铁素体基体,随球铁含钒量增加,超细VC量趋于饱和,这部分碳化物在球铁的强化中起主要作用。Size distribution and precipitation of VC particles in the ferritic nodular cast iron have been examined by techniques of ultrasonic screening, small angle X-ray scattering and chemical dissolution.The VC particles are sized over a wide range. The superfine ones, dispersed in the ferrite matrix, are the large majority. A saturated dispersion with ultrafine VC particles may be approached as the increasing of V content in the iron. This seems to play an important role in the precipitation strengthening for ferritic noldular cast iron.

关 键 词：球墨铸铁 铁素体 粒度分布 VC粒子 

分 类 号：TG143.5[一般工业技术—材料科学与工程]