【作者】 孙学义； 宋红梅； 林勤； 郭锋；

【Author】 Sun Xueyi~1, Song Hongmei~2, Lin Qin~(1*), Guo Feng~1(1.Physical Chemistry Department, University of Science and Technology Beijing, Beijing 100083, China; 2.Baoshang Iron and Steel Co.Lt, Shanghai 201900, China)

【机构】 北京科技大学物理化学系； 宝山钢铁股份有限公司；

【摘要】 本文通过对含铌高强结构钢在1250℃固溶后,在相同应变速率下.在850℃时经过不同应变量的压缩后,Nb的转化率与保温时间的关系的分析,得出了Nb(C,N)析出动力学机制符合方程:-ιn(1-α)=kt,是Nb的二维扩散控速的抛物线型长大机制,进而从应变速率常数角度考察了应变量,Nb含量对Nb(C,N)析出动力学的影响。更多还原

【Abstract】 The present work has concentrated on the Kinetics of Strain Induced Precipitation of Niobium Carbonitrides in Austenite of Nb steels which were deformed at fixed strain rate after reheated at 1250℃. The results show the process of strain Induced precipitation of Nb(C,N) is controlled by 2-dimensional diffusion of Nb atoms and follows the kinetics equation of -ln(l-a) =kt. The strain and the content of Nb have effects on the rate constant. With the strain or the content increasing ,the rate constant will increase.更多还原