V-N微合金化钢筋中钒的析出行为

研究了氮对含钒微合金化钢筋中钒的析出行为的影响。实验结果表明：低氮钒钢中，大部分钒固溶于铁素体基体，比例高达565，只有35．5％钒形成V（C，N）；高氮钒钢中，70％的钒析出形成V（C，N），只有20％的钒因溶于基体，钢氮还减小了V（C，N）颗粒尺寸，明显增加细小V（C，N）析出相的体积分数。

PRECIPITATION BEHAVIOR OF VANADIUM IN V-N MICROALLOYED STEEL

The effect of nitrogen on precipitating behavior of vanadium in V N microalloyed steels is investigated in this paper Nitrogen changes the distribution of vanadium in precipitated phase and ferrite matrix and promotes precipitation of fine V(C,N) particles For low nitrogen V steel, only 35 5 % of the total vanadium precipitates in the form of V(C,N) while 56 % of vanadium is soluted in ferrite matrix However, in V N steels most of vanadium precipitates in the form of V(C,N) and the proportion is up to 70 % Only 20 % of vanadium is soluted in the matrix. Enhanced nitrogen content, which contributes to exploitation of more potential of precipitation strengthening of vanadium, results in remarkable improvement of the strength of vanadium nitrogen steels