A kind of preparation method of tial base alloy honeycomb structure

Abstract

The invention provides a preparing method of a TiAl-based alloy honeycomb structure and relates to a preparing method of a metal honeycomb structure. The preparing method aims at solving the technical problems that currently-prepared honeycomb structures have the defects of a large amount of shrinkage porosity, the working procedure is long, energy consumption is high, cost is high, a large quantity of welding seams exist on honeycomb walls, the process stability is poor, the current TiAl-based alloy is large in high-temperature deformation resistance, and the sheet preparation technology cannot be broken through. The preparing method comprises the first step of forging, the second step of extruding, the third step of water cutting, the fourth step of drawing and the fifth step of brazing. By means of the method, cost is reduced, honeycomb units are obtained through high-temperature drawing, a large number of casting defects in the precise casting method and a large number of welding seams in the bending / welding technology are avoided, and the mechanical performance and the structural stability of the honeycomb units are improved; in addition, honeycomb cores are integrally formed, and thus the structure smoothness is improved. The preparing method is applied to preparing the TiAl-based alloy honeycomb structure.

Description

Technical field [0001] The invention relates to a method for preparing a metal honeycomb structure. Background technique [0002] TiAl-based alloy has the advantages of low density and high specific strength at high temperature. As a new type of lightweight and high-strength material, it has great application potential in the aerospace field. The honeycomb structure has the advantages of high strength, low density, sound insulation and heat insulation, and has been widely used in the aerospace field. TiAl-based alloy honeycomb structure is of great significance for improving the thrust-to-weight ratio of aircraft. The existing processes for preparing honeycomb structures mainly include precision casting and core plate bending / welding combined processes. The TiAl-based alloy honeycomb structure prepared by the precision casting method has a large number of defects such as shrinkage and porosity, which greatly reduces its performance; the core plate bending / welding combined proce...

AI Technical Summary

Problems solved by technology

[0003] The present invention is to solve defects such as a large number of shrinkage porosity in the honeycomb structure prepared at present, long process, high energy consumption, high cost, and a large number of welds in the honeycomb wall , the process stability is poor, and the current TiAl-based alloy has a large high-temperature deformation resistance, and the technical problem that the thin plate preparation technology is difficult to break through, and a method for preparing a TiAl-based alloy honeycomb structure is provided.

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