Processing method for Ti2AlNb alloy wide thin plate

Abstract

The invention discloses a processing method for a Ti2AlNb alloy wide thin plate. The processing method comprises the steps that 1, a Ti2AlNb alloy plate blank is placed into a heating furnace to be subjected to heat preservation and then is fed into a hot rolling mill to be subjected to primary rolling, and a first semi-finished plate blank is obtained; 2, the first semi-finished plate blank is cut into two to four pieces of Ti2AlNb alloy semi-finished plate blank bodies, and then the Ti2AlNb alloy semi-finished plate blank bodies are stacked together to be made into a stacked rolled bag; 3, the stacked rolled bag is placed into the heating furnace to be subjected to heat preservation and then is fed into the hot rolling mill to be subjected to secondary rolling; and 4, finished product annealing treatment is conducted on the stacked rolled bag subjected to secondary rolling, then the stacked rolled bag subjected to finished product annealing treatment is sheared and unpacked, and the Ti2AlNb alloy thin plate of which the thickness is 1 mm-4 mm and the width is 800 mm-1500 mm is obtained after leveling, sanding and cutting. According to the processing method for the Ti2AlNb alloy wide thin plate, the processing route is simple; the preparation cost is low; the efficiency is high; the thin plate excellent in mechanical performance can be prepared; and mass production is achieved.

Description

technical field [0001] The invention belongs to the technical field of processing light-weight high-temperature structural materials, and in particular relates to a Ti 2 A processing method for AlNb alloy wide sheet. Background technique [0002] With the rapid development of the aerospace industry, the requirements for the performance of aerospace materials are getting higher and higher, especially for aerospace engine materials, and it is urgent to further reduce weight and improve the high-temperature service performance of materials. Titanium alloy has become one of the materials of choice for new aerospace engines due to its excellent comprehensive performance. However, due to the limitations of thermal strength and oxidation resistance of traditional titanium alloys, the maximum service temperature and oxidation resistance temperature can only reach 600°C, and this temperature has become the upper limit of the heat resistance of this type of alloy, which is far from m...

AI Technical Summary

Problems solved by technology

[0004] But Ti 2 Due to poor processing plasticity and easy cracking of AlNb-based alloys, it is difficult to prepare thin plates with a thickness of 1 mm to 4 mm, especially for large-scale thin plates with a width ≥ 800 mm. At present, there is no mature rolling method; at the same time, the existing rolling method is used Produced Ti 2 The AlNb thin plate has a large difference between the same plate, the anisotropy of mechanical properties is large, and the yield is low

Therefore, the Ti produced by existing conventional methods 2 AlNb thin sheets can no longer meet the requirements of high dimensional accuracy and small difference in transverse and longitudinal mechanical properties of titanium alloy sheets for aerospace

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