A kind of manufacturing method of titanium alloy hollow blade and titanium alloy hollow blade

Abstract

The invention discloses a method for manufacturing a titanium alloy hollow blade and the titanium alloy hollow blade, which comprises the following steps: preparing two flat plate blanks, processing grooves, fastening the two flat plate blanks, and forming a cavity therebetween; Perform diffusion welding on the two fastened flat plate blanks to form a blade blank, and cool down to room temperature; close the sides of the blade blank, heat up to the temperature of hot isostatic pressing, and perform hot isostatic pressing on the blade blank strengthening treatment; machining the blade blank after hot isostatic pressing treatment according to the design shape; forming and correcting the blade blank after machining; performing finishing processing to obtain the final hollow blade product; the present invention is Diffusion welding is performed on the flat plate blank to form a blade blank, and then the blade blank is subjected to hot isostatic pressing treatment, which can uniformly apply pressure on the blade surface, improve the uniformity and connection strength of the interface connected by diffusion welding, and improve the quality of diffusion welding.

Description

Technical field [0001] The present invention relates to the field of processing and forming of hollow blades, in particular to a method of manufacturing a titanium alloy hollow blade and a titanium alloy hollow blade thereof. Background [0002] Aero engine is an important part of the aircraft, the performance of the engine directly affects the performance of the entire aircraft, the weight reduction of the engine can improve the thrust-to-weight ratio, and the blades of the hollow structure can reduce the overall weight of the engine. Turbofan engines, with their high efficiency and low fuel consumption, have become one of the most installed types in the field of aero engines today. Titanium alloy wide-chord hollow fan blades and compressor adjustable hollow blades are the most representative and important parts of large aviation turbofan engines, which not only have good performance and high efficiency, but also have improved their ability to resist foreign impacts. [0003] At...

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Problems solved by technology

[0005] The Chinese patent application publication number CN 105436839 A discloses a manufacturing method of titanium alloy wide-chord hollow fan blades for aero-engines. Drill holes on the other three sides on the side where the air inlet is left, and place rivets for riveting after deburring; when performing diffusion welding on the three sides with rivets, apply pressure to the upper panel, lower panel and rivets, The diffusion welding surface is formed between the upper panel and the lower panel, the rivet and the upper panel, and the rivet and the lower panel, that is to say, the scheme improves the connection strength of the diffusion welding of the blade by adding rivets to avoid cracking at the welding position , obviously, this solution needs to add rivets to the blade, which will not only destroy the local structure of the blade, but also affect the dynamic balance stability of the blade, which requires a special design. In addition, riveting is only an auxiliary way to increase strength, and does not really improve welding its own quality

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