本文用渡辺提出的合金设计法进行正交设计计算,并用实验进行验证,最后确定出一种高温性能比较好的单晶合金DD3.其成分可保证具有约60wt-％的γ’相.良好的组织稳定性和优越的综合性能.
Orthogonal design calculation of the composition of single crystal has been carried out using the method proposed by Watanabe. The effects of individual elements on the volume fraction of γ' phase, the electron vacancy number and the lattice parameters of γ and γ' phase as well as the lattice misfit between γ matrix and γ' precipitate have been predicted. Based on the calculation, the dependance of composition on microstructure and mechanical properties has been proposed and compared with experimental results. The composition designed by present provides about 60% of volume fraction of γ' in the alloy, good structural tability excellent high temperature mechanical properties were obtained.
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