欢迎登录材料期刊网

材料期刊网

高级检索

为研究钒氮钢的显微组织细化机制,采用扫描电镜及能谱仪分析了夹杂物类型及尺寸,建立了基于夹杂物形核的晶内铁素体等温长大模型.基于此模型计算了钒氨钢奥氏体化后在873 K及823 K等温不同时间产生的晶内铁素体体积分数,并与金相显微镜的实测结果进行了对比分析.结果表明:模型能较好地描述晶内铁素体长大规律;相同等温时间,873 K形成的晶内铁紊体体积分数高于823 K的;随转变温度降低,晶内铁素体体积分数计算值小于实测值,主要原因在于随温度降低,VN或V(C,N)不仅在MnS上析出量增多,而且也在MnS之外析出并成为晶内体素体核心.

参考文献

[1] C. CAPDEVILA;F.G. CABALLERO;C. GARCIA DE ANDRES .Modeling of Kinetics of Isothermal Idiomorphic Ferrite Formation in a Medium-Carbon Vanadium-Titanium Microalloyed Steel[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2001(7):1591-1597.
[2] 刘宏玉,刘建华,黄刚,唐历,余承露,谭克建,陈小龙.V-N对中碳SiMn非调质钢显微组织的影响[J].特殊钢,2009(02):58-60.
[3] 刘宏玉,刘建华,黄刚,陈小龙,余承露,柯晓涛,李海波.钒氮非调质钢的组织变化特征[J].钢铁钒钛,2009(01):16-22.
[4] H.Mabuchi .The Role of Mn Depletion in Intra-Granular Ferrite Transformation in the Heat Affected Zone of Welded Joints with Large Heat Input in Structural Steels[J].ISIJ International,1996(11):1406-1412.
[5] J. -H. SHIM;Y. -J. OH;J. -Y SUH .FERRITE NUCLEATION POTENCY OF NON-METALLIC INCLUSIONS IN MEDIUM CARBON STEELS[J].Acta materialia,2001(12):2115-2122.
[6] J.M.GREGG;H.D.H.BHADESHIA .SOLID-STATE NUCLEATION OF ACICULAR FERRITE ON MINERALS ADDED TO MOLTEN STEEL[J].Acta materialia,1997(2):739-748.
[7] F. ISHIKAWA;T. TAKAHASHI .The formation of intragranular ferrite plates in medium-carbon steels for hot-forging and its effect on the toughness[J].ISIJ International,1995(9):1128-1133.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%