Preparation method of titanium alloy hollow structure

Abstract

The invention relates to a preparation method of a titanium alloy hollow structure. The method comprises the following steps that raw materials are processed, specifically, a titanium alloy plate, titanium alloy filling plates and a titanium alloy cover plate are formed through processing, and a plurality of hollow cavities are formed in one surface of the titanium alloy plate through processing,wherein the titanium alloy cover plate matches the surface, provided with the hollow cavities, of the titanium alloy plate in shape; the filling plates are installed, specifically, each titanium alloyfilling plate is placed into the corresponding hollow cavity, each titanium alloy filling plate is flush with the upper surface of the corresponding hollow cavity, and then each titanium alloy filling plate and the corresponding hollow cavity are connected through welding; the titanium alloy cover plate is installed, specifically, the surface, provided with the hollow cavities, of the titanium alloy plate is covered with the titanium alloy cover plate, and edge sealing welding, baking and vacuum packaging are sequentially conducted on the titanium alloy cover plate and the titanium alloy plate to form a prefabricated blank; diffusion bonding is conducted, specifically, the prefabricated blank is put into a gas diffusion furnace or a hot isostatic pressing furnace for diffusion bonding; and machining is conducted, specifically, a finished part is manufactured through machining. The method is applied to the technical field of titanium alloy manufacturing.

Description

technical field [0001] The invention relates to the technical field of titanium alloy manufacturing, in particular to a method for preparing a titanium alloy hollow structure. Background technique [0002] The preparation methods of titanium alloy hollow sandwich structure include superplastic forming / diffusion bonding process, split structure diffusion bonding and other methods. Among them, the superplastic forming / diffusion bonding method can adopt a three-layer or four-layer structure, and a titanium alloy hollow structure can be prepared in one or two thermal cycles. The split structure diffusion connection method is prepared by dividing two pieces into two halves, and then diffusion connection. [0003] The existing preparation method using titanium alloy hollow structure has the following deficiencies: [0004] 1. Whether it is a superplastic forming / diffusion joining process or a split structure diffusion joining scheme, it is generally necessary to use a high-tempe...

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Problems solved by technology

[0006] 3. When the four-layer sandwich structure is prepared by the superplastic forming / diffusion bonding process, there are problems such as uneven thickness of the formed ribs, the forming height is limited by the superplastic forming limit of the material, and the quality stability of the diffusion connection between the inner layer and the outer layer, etc.

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