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Method for extrusion forging composite near-net forming of titanium alloy thin-wall profile

A near-net forming and extrusion forging technology, which is applied in the direction of manufacturing tools, metal processing equipment, forging/pressing/hammer devices, etc., can solve the problems of low material utilization rate and high production cost, reduce forming temperature, improve plasticity, Solve the effect of low material utilization

Active Publication Date: 2019-10-18
TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0003] In view of the above technical problems, a method of extrusion forging composite near-net forming of titanium alloy thin-walled profiles is provided, which solves the problems of low material utilization rate and high production cost in the prior art

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  • Method for extrusion forging composite near-net forming of titanium alloy thin-wall profile
  • Method for extrusion forging composite near-net forming of titanium alloy thin-wall profile
  • Method for extrusion forging composite near-net forming of titanium alloy thin-wall profile

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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0023] S1. Billet hydrogenation: put the titanium alloy billet in a 100°C hydrogen furnace, and vacuum to 10°C -3 Pa, at 2~20℃min -1 Heat to the hydrogen temperature at a certain speed, put a certain amount of high-purity hydrogen into the hydrogen furnace, and keep the hydrogen partial pressure in the furnace for 1-5 hours after the partial pressure tends to be balanced. -1 The speed is cooled to room temperature to obtain a hydrogen-retained titanium alloy ...

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Abstract

The invention belongs to the technical field of material forming, and particularly relates to a method for extrusion forging composite near-net forming of a titanium alloy thin-wall profile. The method comprises the following steps that S1, a titanium alloy blank is subjected to hydrogen treatment; S2, the titanium alloy blank subjected to hydrogen treatment is extruded and formed; S3, an extrusion profile is subjected to high-frequency forging and shaping into a forged profile; and S4, the forged profile is subjected to annealing and hydrogen removal treatment. The forming temperature of a titanium alloy is reduced through a thermohydrogen treatment process, plasticity of the titanium alloy is improved, large deformation is completed through extrusion forming, and thickness thinning and surface finishing are completed through forging and shaping. According to the method, near-net forming of the titanium alloy thin-wall profile can be achieved, and the problems that in the prior art, the material utilization rate is low and the production cost is high are solved. The method is used for extrusion forging composite near-net forming of the titanium alloy thin-wall profile.

Description

technical field [0001] The invention belongs to the technical field of material forming, in particular to a method for extrusion forging composite near-net forming of titanium alloy thin-walled profiles. Background technique [0002] Titanium alloy thin-walled profiles have very broad application prospects in the aerospace field, but the high processing and manufacturing costs seriously restrict their wide application, and near-net shape is an important way to reduce manufacturing costs. The advantage of extrusion processing is that the extrusion temperature can be at T p (titanium alloy phase transition temperature), at this time, the plasticity of the titanium alloy is good; the conditions for the blank to complete deformation under three-dimensional compressive stress are good, the forming efficiency is high, and most of the deformation can be completed; but because the wall thickness of the profile cannot meet the requirements, and The surface roughness is poor; extrusi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C23/02B21C23/32B21J5/06B21J13/00
CPCB21C23/001B21C23/002B21C23/02B21C23/32B21J5/002B21J5/06B21J13/00
Inventor 牛勇朱艳春马立峰
Owner TAIYUAN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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