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利用电子探针等手段研究了不同Ti含量对DZ68合金凝固过程和偏析的影响.结果表明,随合金中Ti含量的增加,合金的初凝温度和终凝温度逐渐降低,凝固温度区间逐渐增大.当Ti含量达到0.55%~1.7%之间的某一值时,铸态合金中出现(γ+γ')共晶,并随Ti含量增加,(γ+γ')共晶数量增加.随合金中Ti含量的增加,W的负偏析程度显著增加,Cr由正偏析元素逐渐转变成负偏析元素.在终凝前,随合金中Ti含量的增加,凝固前沿固体中的Ti含量随凝同温度下降的平均变化速率增加,而Cr含量随凝同温度下降的平均变化速率下降.

参考文献

[1] Yoon KE;Noebe RD;Seidman DN .Effects of rhenium addition on the temporal evolution of the nanostructure and chemistry of a model Ni-Cr-Al superalloy. II: Analysis of the coarsening behavior[J].Acta materialia,2007(4):1159-1169.
[2] Wu YX;Li XY;Wang YM .First-principles study of the influence of lattice misfit on the segregation behaviors or hydrogen and boron in the Ni-Ni3Al system[J].Acta materialia,2007(14):4845-4852.
[3] 张伟,刘咏,黄劲松,刘彬,贺跃辉.高铌TiAl高温合金的研究现状与展望[J].稀有金属快报,2007(08):1-6.
[4] Yoon KE;Noebe RD;Seidman DN .Effects of rhenium addition on the temporal evolution of the nanostructure and chemistry of a model Ni-Cr-Al superalloy. I: Experimental observations[J].Acta materialia,2007(4):1145-1157.
[5] V. Kindrachuk;N. Wanderka;J. Banhart .Effect of rhenium addition on the microstructure of the superalloy Inconel 706[J].Acta materialia,2008(7):1609-1618.
[6] Shulga A V .Boron and carbon behaviorin the cast Ni-base superelloy EP962[J].Journal of Alloys and Compounds,2007,436(1-2):155-160.
[7] Wang A C;Li Y Y;Fan C G et al.Effect of P and Si(Mn)on The solidification segregation in an iron-based superalloy[J].Scripts Metallurgica et Materialia,1994,31(12):1695-1700.
[8] 褚幼义,季平,唐立,柯俊.硼在镍晶界上的偏聚及钼的影响[J].中国有色金属学报,1991(01):45-50.
[9] Liu L R;Jin T;Zhao N R et al.Effect of carbon additions on the microstructure in a Ni-base single crystal superalloy[J].Materials Letters,2004,58(17-18):2290-2294.
[10] T. Kitashima;T. Yokokawa;A.C. Yeh .Analysis of element-content effects on equilibrium segregation at gamma/gamma' interface in Ni-base superalloys using the cluster variation method[J].Intermetallics,2008(6):779-784.
[11] 王安川;李依依;李冬法 等.Nb,Ti含量对J-90合金凝固偏析的影响[J].金属学报,1995,31(05):A216-A222.
[12] 阳大云,张炫,金涛,孙晓峰,管恒荣,胡壮麒.钴、钨和钛对镍基单晶高温合金持久性能的影响[J].稀有金属材料与工程,2005(08):1295-1298.
[13] 刘丽荣,金涛,赵乃仁,王志辉,孙晓峰,管恒荣,胡壮麒.Ti含量对一种镍基单晶合金组织和持久性能的影响[J].稀有金属材料与工程,2006(11):1830-1834.
[14] 管秀荣,郑志,佟健,刘恩泽,于永泗,朱耀宵,翟玉春.DZ68镍基高温合金的凝固偏析[J].中国有色金属学报,2009(02):272-278.
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