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该合金的化学成分 (原子百分比 ) :Al,4 5.0～ 4 8.0 ;Cr,1～ 3;V,0～ 3;Nb,0～ 3;Ni,0 .2～ 0 .8;余为 Ti。本发明通过镍微合金化促使铸造钛铝粗大的片层组织转变为近γ的细小等轴晶 ,进而或将其热处理为综合力学性能优异的细小全片层组织 ;或以其作为热加工的预备组织 ,提高?
The chemical composition of the alloy (atomic percent): Al, 4 5.0 ~ 4 8.0; Cr, 1 ~ 3; V, 0 ~ 3; Nb, 0 ~ 3; Ni, 0.2 ~ 0.8; In the invention, the microstructure of the coarse titanium aluminum-aluminum cast is transformed into the fine equiaxed grains near the γ through the nickel micro-alloying, and then the thin equiaxed grains of the near-γ are further heat-treated to be the fine whole-layer structure with excellent comprehensive mechanical properties; Prepare organizations to improve?