Hf和Zr含量对FGH96合金平衡相及PPB的影响  

Effect of content of Hf and Zr on equilibrium phase and PPB in FGH96 P/M superalloy

作　　者：夏天[1,2] 张义文[1] 迟悦[1] 刘建涛[1] 贾建[1] 韩寿波[1] 

机构地区：[1]钢铁研究总院高温材料研究所,北京100081 [2]高温合金新材料北京市重点实验室,北京100081

出　　处：《材料热处理学报》2013年第8期60-67,共8页Transactions of Materials and Heat Treatment

基　　金：国家重点基础研究发展计划(2010CB631204)

摘　　要：采用材料热力学计算软件Thermo-calc,计算了FGH96合金中的平衡相,并结合显微组织观察、能谱和相分析,探讨Hf、Zr含量对γ'相和碳化物的影响,及对消除PPB的作用。结果表明:Hf和Zr不会导致产生新相,主要影响MC和γ'相的析出行为与成分。Hf和Zr能显著改变MC型碳化物的组分,增加其热力学稳定性和数量,促进MC型碳化物在合金中的均匀分布,抑制MC向M23C6转变;Hf还可以参与形成γ'相,增加其数量。Hf、Zr有助于消除FGH96合金中的原始颗粒边界(PPB)。Effect of content of Hf and Zr on thermodynamics equilibrium phases precipitation in FGH96 P/M superalloy was studied by using the Thermo-calc software and phase analysis. Meanwhile, the precipitation behavior and composition of γ＇ and MC phases of the alloy were also examined by means of optical microscopy（OM） , scanning electron microscopy（ SEM ） , transmission electron microscopy （TEM） , and energy dispersive spectrometer（EDS） analysis. The results show that no new phase is observed in the FGH96 alloy with different content of Hf and Zr. MC phase is modificated markedly, including the obviously increased content, more homogeneous distribution, significant alteration of elemental composition and precipitation curve for MC phase, and suppressing the transformation of MC into M23C6 for the alloy with the addition of Hf and Zr. The precipitation of γ＇ phase is slightly enhanced in the alloy with higher content of Hr. It is found that the microstrcture is improved, and prior particle boundary（PPB） is also minimized by additions of Hf and Zr.

关 键 词：FGH96合金 铪 锆 平衡相 碳化物 

分 类 号：TG132.3[一般工业技术—材料科学与工程]