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Method of TA18 pipe fatigue strength for increasing aviation hydraulic pipeline

A hydraulic pipeline and fatigue strength technology, applied in the field of titanium alloy tube manufacturing, can solve the problems that cannot meet the fatigue strength requirements of aviation hydraulic pipelines and affect the reliability of aviation hydraulic pipelines, so as to improve fatigue strength and eliminate residual Stress, the effect of improving the fatigue strength

Inactive Publication Date: 2018-10-26
张家港华裕有色金属材料有限公司
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Problems solved by technology

However, the manufactured titanium alloy tubes still cannot meet the fatigue strength requirements of aviation hydraulic pipelines, and the insufficient fatigue strength of titanium alloy tubes will directly affect the reliability of aviation hydraulic pipelines on the aircraft

Method used

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  • Method of TA18 pipe fatigue strength for increasing aviation hydraulic pipeline

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Embodiment Construction

[0019] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art.

[0020] This embodiment provides a method for improving the fatigue strength of the TA18 pipe used in aviation hydraulic pipelines, comprising the following steps: projecting solid particles onto the surface of the TA18 pipe with a pressure greater than 0.1MPa, and the surface of the TA18 pipe For striking, the mesh number of the solid particles is not less than 80.

[0021] refer to figure 1 As shown, the method specifically includes the following steps:

[0022] S1. Cold rolling the TA18 tube billet to make the TA18 tube preliminary shape. At this time, the cold-processed tube billet has a lot of internal stress;

[0023] S2. Carry out heat treatment to the cold-rolled TA18 billet, specifically high-strength annealing...

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Abstract

The invention discloses a method of TA18 pipe fatigue strength for increasing an aviation hydraulic pipeline. The method comprises the following steps that solid particles are projected to the surfaceof the TA18 pipe blank at the pressure greater than 0.1 MPa, the surface of the TA18 pipe blank is blown, wherein the number of the solid particles is no less than 80; the solid particles are projected to the surface of the TA18 pipe blank after acid pickling at the pressure greater than 0.1 MPa, the surface of the pipe blank is blown for residual stress relieving and refining grain of the pipe blank, the fine grain is formed on the surface of the TA18 pipe blank, and thus the TA18 pipe fatigue strength is increased. The TA18 pipe fatigue strength is increased by more than 30% compared with the existing fatigue strength, according to the method of TA18 pipe fatigue strength for increasing the aviation hydraulic pipeline, the TA18 pipe meets the requirements of the aviation hydraulic pipeline for the fatigue strength, and thus the reliability of the aviation hydraulic pipeline on plane is increased.

Description

technical field [0001] The invention belongs to the field of manufacturing titanium alloy pipes for aviation hydraulic pipelines, in particular to a method for improving the fatigue strength of TA18 pipes for aviation hydraulic pipelines. Background technique [0002] Titanium alloy tubes (such as TA18 titanium alloy tubes) manufactured from titanium alloy seamless tube blanks by cold rolling are widely used as aviation tubes and have great application requirements in the aviation field. In the prior art, the titanium alloy tube blank is mainly formed by cold rolling, and the cold-worked titanium alloy tube has relatively large stress. Therefore, heat treatment is generally performed afterwards, and high-strength annealing is performed to relieve stress. However, the manufactured titanium alloy tubes still cannot meet the fatigue strength requirements of aviation hydraulic pipelines, and the insufficient fatigue strength of titanium alloy tubes will directly affect the reli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/18
CPCC22F1/183
Inventor 刘守田李华
Owner 张家港华裕有色金属材料有限公司
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