| 含钒微合金钢的析出行为研究 |
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| 引用本文： | 方芳,雍岐龙,杨才福,张永权,苏航. 含钒微合金钢的析出行为研究[J]. 钢铁, 2010, 45(3) |
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| 作者姓名： | 方芳 雍岐龙 杨才福 张永权 苏航 |
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| 作者单位： | 钢铁研究总院结构材料研究所,北京,100081 |
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| 基金项目： | 国家自然科学基金项目(50441032) |
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| 摘 要： | 在Johnson-Mehl-Avrami动力学方程的基础上,建立Fe-C-V-N合金体系中V(C,N)的析出动力学方程,研究了4种氮含量的低碳钒微合金钢(Fe-C0.05-V0.08)中V(C,N)的形核机制及在奥氏体中的析出过程。结果表明:V(C,N)主要形核位置在位错线上,平衡析出的鼻点温度在820℃左右,析出开始时间随氮含量的增大而减小。利用Gleeble-1 500D热力模拟试验机进行了应力松弛试验,根据曲线拟合得到的鼻点温度为850℃,将理论计算与试验值的差异缩小到30℃以内。
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| 关 键 词： | 低碳钒微合金钢 析出动力学 形核机制 |
Precipitation Behavior in Vanadium Micro-Alloyed Steel |
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| FANG Fang,YONG Qi-long,YANG Cai-fu,ZHANG Yong-quan,SU Hang. Precipitation Behavior in Vanadium Micro-Alloyed Steel[J]. Iron & Steel, 2010, 45(3) |
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| Authors: | FANG Fang YONG Qi-long YANG Cai-fu ZHANG Yong-quan SU Hang |
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| Affiliation: | Institute of Structural Material;Central Iron and Steel Research Institute;Beijing 100081;China |
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| Abstract: | Based on Johnson-Mehl-Avrami equation,a kinetic model was developed to predict the nucleation mechanisms and kinetics of V(C,N)precipitate in austenite in low carbon vanadium micro-alloyed steel(0.05%C-0.08%V)with 4 kinds of nitrogen contents.The results calculated by the model indicate that,the precipitates nucleated preferentially at dislocation;the nose temperature of V(C,N)precipitate in austenite is around 820℃;and the start time to precipitate decrease with increase of nitrogen.The experimental results obtained ftom stress-relaxation on Gleeble-1500D show that,the nose temperature is 850℃,which reduccs the error within 30℃. |
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| Keywords: | low carbon vanadium micro-alloyed steel precipitation kinetics nucleation mechanism |
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