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通过两次包套锻造工艺细化了高 Nb- Ti Al合金铸态近片层组织。研究发现 ,两次锻造后接近二次锻造表面基本上是由大量的直线型或者流线型片层组织和少量的再结晶组织组成 ,而除此以外的大部分区域都发生了较大程度的再结晶 ,并且晶粒均匀细小。在 (α+γ)两相区长时间热处理二次锻后组织可以有效消除 β相 ,获得的仍然是双态组织
The as-cast near-nacellar microstructure of high Nb-Ti Al alloy was refined by two enveloping forging processes. The study found that the nearly forged surface after two forging consisted essentially of a large number of rectilinear or streamline lamellae and a small amount of recrystallized microstructure, whereas most of the rest of the forged area had a greater degree of recrystallization , And the grains are fine and even. In the (α + γ) two-phase heat treatment for a long time after two forging organizations can effectively eliminate the β-phase, obtained is still a binary state