摘要
采用力学性能测试、光学显微镜、透射电镜等方法,研究了不同工艺条件下钒对微合金钢组织和性能的影响。结果表明,在同一工艺条件下,钢的强度随钒含量的增加而有所提高,轧材韧性下降,而正火钢韧性没有明显的变化;正火后钢的强度下降,韧性得到改善;添加钒不改变钢的显微组织,均为多边形铁素体和珠光体;钢中钒大部分固溶于基体中,当钒含量达到一定量时,轧材中有大量单独钒的碳氮化物析出,正火钢中碳氮化物均以复合形态存在。
The influences of vanadium on microstructure and mechanical properties of microalloyed steels under different processes were analyzed by means of mechanical property test and microstructural analysis with optical microscope and transmission electron microscope.The results show that the strength increases with increasing vanadium content,and toughness of the hot rolled steel decreases,but that of the normalized steel has not obviously changed under the same process.The strength decreases and toughness improves after normalizing.Adding vanadium can not change the microstructure of the steel,the microstructure of the tested steels is polygonal ferrite and pearlite.A majority of vanadium dissolves into the matrix,and there is a great deal of vanadium carbonitrides in hot rolled steel with a proper vanadium content,however,there exist complex cabonitrides after normalizing.
出处
《金属热处理》
CAS
CSCD
北大核心
2010年第11期45-49,共5页
Heat Treatment of Metals
关键词
微合金钢
钒
析出相
组织
力学性能
microalloyed steel
vanadium
precipitates
microstructure
mechanical properties
