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·1330 工程科学学报,第37卷,第10期 图细晶强化贡献值☑☑位错强化责献值 Yang C F,Zhang Y Q,Wang R Z.Metallurgical Principle and 析出强化贡献值 固溶强化贡献值 Application of Vanadium-microulloyed Steel.China:Metallurgical 516 509 472 Industry Press,2012 (杨才福,张永权,王瑞珍.钒钢治金原理与应用.中国:治金 450 工业出版社,2012) 4 Lagneborg R,Siwecki T,Zajac S,et al.The role of vanadium in 108 300 6☒ microalloyed steels.Scand J Metall,1999,28(5):186 [5]Medina S F,Gomez M,Rancel L.Grain refinement by intragran- 150 ular nucleation of ferrite in a high nitrogen content vanadium mi- 141 141 croalloyed steel.Scripta Mater,2008,58(12):1110 [6]Cladman T.The Physical Metallurgy of Microalloyed Steels.Lon- 热轧态 热轧态 正火态 正火态 don:Maney Publishing,1997 实验值 计算值 实验值 计算值 ]Yang C F.The latest technological progress of V-N high strength 图6热轧态与正火态实验钢屈愚强度计算 concrete steel.fron Steel,2010,45(11)1 Fig.6 Yield strength calculation of the hot-rolled steel and normal- (杨才福.高强度建筑钢筋的最新技术进展.钢铁,2010,45 ized steel (11):1) 8] Mao X P,Chen LL,Zhu D Y.Development of microalloyed 总院的龚维幂等人做了大量的研究B5,2.研究成果 technology in thin slab casting and rolling.fron Steel,2008,43 表明:热轧中或者热轧后在奥氏体晶内析出的V(C, (4):1 N)颗粒能够为晶内铁素体形核提供核心,促进铁素体 (毛新平,陈麒琳,朱达炎.薄板坯连铸连轧微合金化技术发 的晶粒细化和体积分数的增加.同时,对V钢中增氮 展现状钢铁,2008,43(4):1) 9] 可以促进V(C,N)在奥氏体中的析出,从而为晶内铁 Cheng D,Zhang Y Q,Yang C F.Application of V-N alloy into the high strength H shape steel.Iron Steel,2008,43(6):97 素体提供更多核心.本实验V一N钢在正火保温过程 (程鼎,张永权,杨才福.钒氮合金在高强度H型钢中的应 中,未溶解的V(C,N)析出相能够钉扎奥氏体晶界,同 用.钢铁,2008,43(6):97) 时这些V(C,N)粒子发生粗化:在正火冷却过程中这 [10]Yong Q L.Second Phases in Structural Steels.China:Metallurgi- 些粗化的V(C,N)更容易成为晶内铁素体形核的异质 cal Industry Press,2006 核心,起到良好的细化铁素体晶粒的效果 (雍歧龙.钢铁材料中的第二相.中国:治金工业出版社, 2006) 4结论 [11]Gladman T.Precipitation hardening in metals.Mater Sci Techn- ol,1999,15(1):30 (1)与轧制状态相比,正火后V-N钢细晶强化贡 [12]Gladman T.On the theory of the effect of precipitate particles on 献值增加31MPa,而析出强化贡献值减少45MPa. grain growth in metals.Proc R Soc London A,1966,294 (2)正火加热保温过程中,V一N钢有约32.9%的 (1438):298 D3] V(C,N)未溶解,阻止奥氏体晶粒长大.在正火冷却过 Zajac S.Precipitation and grain refinement in vanadium-contai- ning steels//Proceedings International Symposium 2001 on Va- 程中,未溶解的V(C,N)诱导晶内铁素体形核,细化铁 nadium Application Technology.Beijing,2001:62 素体晶粒,而溶解的V(C,N)重新析出,起到析出强化 [14]Ohmori A,Oi K,Kawabata F,et al.Effect of VN precipitates 作用 on formation of grain boundary and intragranular ferrite in a high NV bearing steel.Tetsu-to-Hagane,1998,84(11):797 参考文献 [15]Gong W M,Yang C F.Zhang Y Q.Research of grain-refinement LiJ G.The Mechanical Theory of Pressure Vessel Design and Its in V-N microalloyed steel.J fron Steel Res,2006,18(10):49 Application of Standard.China:China Machine Press,2004 (龚维幂,杨才福,张永权.钒氮钢中的品粒细化的研究.钢 (李建国.压力容器设计的力学基础及其标准应用.中国:机 铁研究学报,2006,18(10):49) 械工业出版社,2004) 16 Pan T,Yang C F,Gong W M,et al.Behavior of V(C,N)in 2]Moss D R,Chen Y Z.Pressure Vessel Design Manual.China: austenite and its grain-refinement effect.J /ron Steel Res,2005, China Petrochemical Press,2006 17(B08):96 (Moss D R,陈允中.压力容器设计手册.中国:中国石化出 (潘涛,杨才福,龚维幂,等.V(C,N)在奥氏体中析出的动 版社,2006) 力学行为及其对品粒细化的作用.钢铁研究学报,2005,17 (B08):96)工程科学学报,第 37 卷,第 10 期 图 6 热轧态与正火态实验钢屈服强度计算 Fig. 6 Yield strength calculation of the hot-rolled steel and normal￾ized steel 总院的龚维幂等人做了大量的研究[3,5,12--16]. 研究成果 表明: 热轧中或者热轧后在奥氏体晶内析出的 V( C, N) 颗粒能够为晶内铁素体形核提供核心,促进铁素体 的晶粒细化和体积分数的增加. 同时,对 V 钢中增氮 可以促进 V( C,N) 在奥氏体中的析出,从而为晶内铁 素体提供更多核心. 本实验 V--N 钢在正火保温过程 中,未溶解的 V( C,N) 析出相能够钉扎奥氏体晶界,同 时这些 V( C,N) 粒子发生粗化; 在正火冷却过程中这 些粗化的 V( C,N) 更容易成为晶内铁素体形核的异质 核心,起到良好的细化铁素体晶粒的效果. 4 结论 ( 1) 与轧制状态相比,正火后 V--N 钢细晶强化贡 献值增加 31 MPa,而析出强化贡献值减少 45 MPa. ( 2) 正火加热保温过程中,V--N 钢有约 32. 9% 的 V( C,N) 未溶解,阻止奥氏体晶粒长大. 在正火冷却过 程中,未溶解的 V( C,N) 诱导晶内铁素体形核,细化铁 素体晶粒,而溶解的 V( C,N) 重新析出,起到析出强化 作用. 参 考 文 献 [1] Li J G. The Mechanical Theory of Pressure Vessel Design and Its Application of Standard. China: China Machine Press,2004 ( 李建国. 压力容器设计的力学基础及其标准应用. 中国: 机 械工业出版社,2004) [2] Moss D R,Chen Y Z. Pressure Vessel Design Manual. China: China Petrochemical Press,2006 ( Moss D R,陈允中. 压力容器设计手册. 中国: 中国石化出 版社,2006) [3] Yang C F,Zhang Y Q,Wang R Z. Metallurgical Principle and Application of Vanadium-microalloyed Steel. China: Metallurgical Industry Press,2012 ( 杨才福,张永权,王瑞珍. 钒钢冶金原理与应用. 中国: 冶金 工业出版社,2012) [4] Lagneborg R,Siwecki T,Zajac S,et al. The role of vanadium in microalloyed steels. Scand J Metall,1999,28( 5) : 186 [5] Medina S F,Gómez M,Rancel L. Grain refinement by intragran￾ular nucleation of ferrite in a high nitrogen content vanadium mi￾croalloyed steel. Scripta Mater,2008,58( 12) : 1110 [6] Gladman T. The Physical Metallurgy of Microalloyed Steels. Lon￾don: Maney Publishing,1997 [7] Yang C F. The latest technological progress of V--N high strength concrete steel. Iron Steel,2010,45( 11) : 1 ( 杨才福. 高强度建筑钢筋的最新技术进展. 钢铁,2010,45 ( 11) : 1) [8] Mao X P,Chen L L,Zhu D Y. Development of microalloyed technology in thin slab casting and rolling. Iron Steel,2008,43 ( 4) : 1 ( 毛新平,陈麒琳,朱达炎. 薄板坯连铸连轧微合金化技术发 展现状钢铁,2008,43( 4) : 1) [9] Cheng D,Zhang Y Q,Yang C F. Application of V--N alloy into the high strength H shape steel. Iron Steel,2008,43( 6) : 97 ( 程鼎,张永权,杨才福. 钒氮合金在高强度 H 型钢中的应 用. 钢铁,2008,43( 6) : 97) [10] Yong Q L. Second Phases in Structural Steels. China: Metallurgi￾cal Industry Press,2006 ( 雍歧龙. 钢铁材料中的第二相. 中国: 冶金工业出版社, 2006) [11] Gladman T. Precipitation hardening in metals. Mater Sci Techn￾ol,1999,15( 1) : 30 [12] Gladman T. On the theory of the effect of precipitate particles on grain growth in metals. Proc R Soc London A,1966,294 ( 1438) : 298 [13] Zajac S. Precipitation and grain refinement in vanadium-contai￾ning steels / / Proceedings International Symposium 2001 on Va￾nadium Application Technology. Beijing,2001: 62 [14] Ohmori A,Oi K,Kawabata F,et al. Effect of VN precipitates on formation of grain boundary and intragranular ferrite in a high NV bearing steel. Tetsu-to-Hagane,1998,84( 11) : 797 [15] Gong W M,Yang C F,Zhang Y Q. Research of grain-refinement in V--N microalloyed steel. J Iron Steel Res,2006,18( 10) : 49 ( 龚维幂,杨才福,张永权. 钒氮钢中的晶粒细化的研究. 钢 铁研究学报,2006,18( 10) : 49) [16] Pan T,Yang C F,Gong W M,et al. Behavior of V( C,N) in austenite and its grain-refinement effect. J Iron Steel Res,2005, 17( B08) : 96 ( 潘涛,杨才福,龚维幂,等. V( C,N) 在奥氏体中析出的动 力学行为及其对晶粒细化的作用. 钢铁研究学报,2005,17 ( B08) : 96) ·1330·
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