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In718合金凝固过程中偏析和二次枝晶角度对糊状区Rayleigh数的影响 被引量：4

Effects of Segregation of Nb,Mo and Orientation of Secondary Dendrites on Rayleigh Number in Mushy Zone of Ni-base Superalloys
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摘要 用扫描电镜和能谱仪研究分析了Inconel 718合金定向凝固过程中枝晶间的偏析和二次枝晶角度对合金Rayleigh数的影响。结果表明,Inconel 718合金凝固过程中的主要偏析元素是Nb和Mo,合金的Rayleigh数在液相线下10℃值最高,形成黑斑趋势最大;Inconel 718合金糊状区内,二次枝晶角度对Rayleigh数值具有显著的影响。 The effects of the segregation of interdendritic liquid and the orientation of the secondary dendrites in the mushy zone of superalloy Inconel 718 during directional solidification on Rayleigh number were investigated by SEM and EDAX techniques.It was found that the segregation elements in solidification process of Inconel 718 alloy mainly are Nb and Mo.The Rayleigh number is highest at 10 ℃ below liquidus temperature,which indicates that the trends of forming freckles is the maximum.The relative Rayleigh number is significantly affected by the orientation of the secondary dendrites.
作者 王玲 蔡文静 刘林
机构地区 南京信息工程大学物理与光电工程学院 西北工业大学材料学院
出处 《铸造技术》 CAS 北大核心 2012年第10期1191-1193,共3页 Foundry Technology
关键词 高温合金 黑斑 Nb、Mo偏析 相对Rayleigh数 二次枝晶角度 superalloy freckles segregation of Nb Mo Rayleigh number secondary dendrites orientation
分类号 TG244 [金属学及工艺—铸造]
  • 相关文献

参考文献10

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共引文献10

同被引文献23

  • 1崔旭辉,许云波,王昭东,张良哲,刘相华,王国栋.Nb-Ti微合金钢碳氮化物的析出热力学模型及分析[J].钢铁研究,2004,32(5):36-39. 被引量：15
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引证文献4

二级引证文献9

铸造技术
2012年 第10期

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