·1328· 工程科学学报，第37卷，第10期 a 热轧态 40 淬火态 30 20 1-551010-18- 36-60-96-140-200 1-55-1010-18- 36- 60-96-140-200- 18366096140200300 18366096140200300 V(C,N)析出相粒度anm V(C.N)析出相粒度hmm 正火态 0016 ☐热轧态 淬火态 ☑正火态 0.012 20 0.008 10H ☑ 15 5-1010-18- 36-60-96-140-200- 5-1010- 18- 36- 60-96-140-200- 18366096140200300 18366096140200300) V(C,N析出相粒度/m V(CN)析出相粒度m 图3不同工艺条件下V-N钢中V(C,N)相粒度分布及V(C,N)中V在合金中的质量分数随粒度的分布.(a)热轧态R1:(b)淬火态Q1: (c)正火态N1:(d)V(C,N)中V在合金中的质量分数随粒度的分布 Fig.3 Size distribution of V(C.N)precipitations and mass fraction of the precipitated V of V(C,N)in the V-N microalloyed steel under different processes:(a)hot-rolled:(b)quenched:(c)normalized:(d)mass fraction of precipitated V with particle size 01m d 50 nm 图4不同工艺条件下V(C,N)析出相的透射电镜明场相形貌及其对应的衍射花样标定.()热轧态：(b)淬火态：()正火态：(d)衍射花 样标定 Fig.4 Morphology of V(C,N)by using high resolution transmission electron microscopy and diffraction pattern of precipitations:(a)hot-rolled: (b)quenched:(c)normalized:(d)diffraction pattern工程科学学报，第 37 卷，第 10 期 图 3 不同工艺条件下 V--N 钢中 V( C，N) 相粒度分布及 V( C，N) 中 V 在合金中的质量分数随粒度的分布． ( a) 热轧态 Ｒ1; ( b) 淬火态 Q1; ( c) 正火态 N1; ( d) V( C，N) 中 V 在合金中的质量分数随粒度的分布 Fig． 3 Size distribution of V( C，N) precipitations and mass fraction of the precipitated V of V( C，N) in the V--N microalloyed steel under different processes: ( a) hot-rolled; ( b) quenched; ( c) normalized; ( d) mass fraction of precipitated V with particle size 图 4 不同工艺条件下 V( C，N) 析出相的透射电镜明场相形貌及其对应的衍射花样标定． ( a) 热轧态; ( b) 淬火态; ( c) 正火态; ( d) 衍射花 样标定 Fig． 4 Morphology of V( C，N) by using high resolution transmission electron microscopy and diffraction pattern of precipitations: ( a) hot － rolled; ( b) quenched; ( c) normalized; ( d) diffraction pattern ·1328·