TiAl alloy plate rapid preparation method

Abstract

The invention discloses a TiAl alloy plate rapid preparation method. The preparation method comprises the steps of preparation of a TiAl alloy plate blank, sheathing of the TiAl alloy plate blank, early-stage sheath rolling of a TiAl alloy, later-stage sheath rolling of the TiAl alloy, stress relief annealing and sheath removing. Through the method, the Al content of the TiAl alloy is not higher than 44.5%, it is ensured that a high-temperature structure of the alloy contains a certain number of unordered phases beta and phases alpha before rolling, and the alloy has excellent deformability. Rapid high-efficiency rolling on the plate can be implemented at low rolling temperature and large pass deformation, the whole rolling period is short, refining of crystal particles is facilitated, andthe mechanical performance of the plate is finally improved. The preparation method has the advantages that the process is simple, the cost is low, and the high-quality non-defective TiAl alloy platecan be prepared.

Description

technical field [0001] The invention relates to a method for rapidly preparing TiAl alloy plates. Background technique [0002] The development of aerospace technology has put forward higher requirements on the performance of skin materials and engine materials. The high performance and lightweight of new materials have become the trend of future development. TiAl alloy has low density, good high temperature oxidation resistance and creep resistance, high specific strength and specific stiffness, and has broad application prospects in the aerospace field. However, the inherent brittleness of TiAl alloys, poor thermal processing ability, and narrow processing temperature range seriously increase the processing cost of TiAl alloys and limit its engineering applications. The preparation of TiAl alloy sheet is one of the most important topics in its practical research. A potential field of application of TiAl alloy sheets is thin sheets, grid structures or honeycomb structures...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of narrow thermal processing window and poor thermal deformation ability of TiAl alloy in the above-mentioned prior art, which lead to easy cracking of the plate during the rolling process, difficult forming and low rolling efficiency, and provide an efficient and rapid preparation Method for TiAl alloy sheet material, which can be rolled under low temperature and large deformation rolling process