摘要
为应用d-电子合金设计理论(或新相分计算法(New PHACOMP))设计发展新型抗热腐蚀单晶高温合金,首先对高Cr抗热腐蚀IN738LC系列合金Ni—16Cr—9.5Al—4.0Ti-8.0Co—0.55Nb—0.06Zr—0.05B—0.47C-Ta—W—Mo(at-％)的相稳定性进行了综合评价得出抑制σ相析出的稳定性临界条件为Mdt<0.991或Mdγ<0.93同时证明这两个临界电子参数具有等价性,可以用Mdt代替Mdγ简化合金设计过程.
As the first step to design and develop the new hot corrosion resistant Ni-basestngle crystal superalloys by the d-electrons alloy design theory (or the New PHACOMP), acomprehensive evaluation of the phase stability of the modified widely used hot corrosionresistant IN 73SLC Ni-base superalloy [Ni-16Cr-9.5Al-4.0Ti-8.0Co-0.55Nb-0.06Zr-0.05B-0.47C-(0-3)Ta-(0-3)W-(0-3)Mo (at.-%) was conducted. The criti-cal conditions for suppressing the precipitation of brittle phase can be decribed by the elec-tronic parameters Mdt≤0.99 and Mdγ≤v0.93, which can be applied to the d-electrons alloydesign of hot corrosion resistant Ni-base superalloys with high Cr contents. They are themost important reference parameters for the alloy design practice. It was also proved that thetwo critical parameters Mdt and Mdγ are equivalent so that the Mdγ could be replaced byMdt, which will greatly simplify the alloy design process.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第7期A289-A296,共8页
Acta Metallurgica Sinica
关键词
相稳定性
镍基合金
耐热合金
设计
d-electron alloy design
hot corrosion resistant Ni-base superalloy
phase stability
