A forging method for realizing synergistic enhancement of strength and plasticity of titanium-aluminum alloy by regulating lamella orientation

Abstract

The present application relates to a kind of forging methods for realizing the synergistic enhancement of titanium-aluminum alloy strength and ductility by regulating lamellar orientation, comprising the following steps: cylindrical titanium-aluminum alloy blank coated with glass protective lubricant on the surface, multi-pass forging along X, Y, Z three directions in α+β two-phase region temperature in turn, re-temperature in α+β two-phase region before each pass forging, and control the deformation amount and forging speed of each pass.The present application combines multi-directional forging with inter-pass temperature re-heating, not only can effectively inhibit the tendency of forging cracking, but also can promote <a+c> type conical surface slip in α phase, drive the crystal to rotate to a specific orientation, and finally form a microstructure with soft and hard oriented lamellar coexisting in the structure.This method can make titanium-aluminum alloy obtain excellent strength and ductility matching without subsequent complex heat treatment, simplifying the process flow and reducing production cost.

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