热机械过程不同阶段09MnVTiN钢中微合金碳氮析出物的特征  

CHARACTERISTICS OF CARBONITRIDES PRECIPITATED DURING THERMOMECHANICAL PROCESSING FOR A V-Ti MICROALLOYED STEEL

作　　者：唐国翌[1] 郑炀曹[2] 朱静[3] 蔡其巩[3] 

机构地区：[1]清华大学 [2]燕山大学 [3]钢铁研究总院

出　　处：《钢铁》1993年第5期39-43,53,共6页Iron and Steel

摘　　要：本文研究了工业生产的09MnVTiN微合金钢在热机械过程各阶段所析出的微合金碳氮化物的特征。结果表明:在热变形过程中和随后的控冷阶段自奥氏体中析出的均是(Ti_xV_(1-x))CN,在γ/α相变后,VCN既可沿预先存在的(Ti_xV_(1-x))CN表面外延析出,也可单独以针棒状、簇状和列状在铁素体基体上析出。析出相的形状、尺寸、分布和化学组成强烈地受控冷工艺影响。The characteristics of the carbonitrides precipitated during thermomechanical processing were investigated for a V-Ti microalloyed steel. It is shown that the particles precipitated in austenite are all(Ti_xV_(1-x))CN. However, after γ/α transformation precipitation of VCN takes place both heterogeneously i.e. on pre existing (Ti_x V_(1-x))CN and homogeneonsly in needle or striae shape and row arrangement, The size, amount and chemical compositions of the precipitates are influenced markedly by the cooling rate after hot deformation.

关 键 词：析出物 微合金钢 控冷工艺 碳氮化物 析出相 Α相 奥氏体 VT CN 阶段 

分 类 号：TF777[冶金工程—钢铁冶金] TG142[一般工业技术—材料科学与工程]