A method for preparing a three-dimensional lattice sandwich structure of a superalloy

Abstract

The invention discloses a preparation method of a high-temperature alloy three-dimensional lattice sandwich structure. According to the preparation method, the three-dimensional lattice sandwich structure made of materials such as high-temperature alloy difficult for diffusion bonding is prepared by means of subjecting face plates and a cut grid core plate to hot isotatic pressure diffusion bonding prior to superplastic forming. By the method, the three-dimensional lattice sandwich structure which is difficult to prepare by an existing method, complex in appearance, excellent and stable in performance and made of the materials such as the high-temperature alloy can be formed accurately. The high-temperature alloy three-dimensional lattice sandwich structure, which is complex in appearance and prepared by means of hot isostatic pressing prior to superplastic forming, has the advantage of stability in apperance dimension and performance; the method has the advantages of stable performance, high efficiency and the like, and is widely applied to airplanes, guided missiles and high-thrust-to-weight-ratio engines thereof.

Description

technical field [0001] The invention relates to a high-temperature alloy structure forming technology, in particular to a preparation method of a high-temperature alloy three-dimensional lattice sandwich structure. Background technique [0002] At present, the metal three-dimensional lattice structure (English name is metalthreedimensionalallatticestructure) not only has the characteristics of light weight and high specific strength, but also has the functions of electromagnetic wave absorption, absorption of explosion and impact energy, thermal control, noise management, catalyst support, filtration, electrical energy storage, chemical retardation Reaction and fire prevention, growth of biological tissue and many other functions. The research results show that the strength of the lattice material is obviously higher than that of the corrugated board and metal aluminum foam material of the same density. Compared with honeycomb materials, the strength of lattice materials al...

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Problems solved by technology

[0006] 1. Due to the poor diffusion connection of superalloys, it is difficult to use the three-dimensional lattice structure of metal wires prepared by diffusion connection method;

[0007] 2. The superalloy lattice structure is prepared by investment casting method. Since it is a casting structure, it is prone to defects and has low mechanical properties, especially poor toughness.

It is difficult to achieve investment casting for some materials with poor flow

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