Manufacturing method of dissimilar alloy blisk structure

Abstract

The invention relates to a method for manufacturing a heterogeneous alloy integral blisk structure. Including: the blisk is rotatably axially installed on the high conductivity metal support base through the high conductivity metal support shaft, and the support base is installed on the graphite electrode bottom plate; after the blade and the blisk are assembled, the discharge plasma is used to diffuse Welding is carried out by welding. When welding, the graphite electrode pressing block is used to apply pressure on the top of the blade, and a DC pulse current is connected between the graphite electrode pressing block and the graphite electrode bottom plate to generate discharge plasma. The rapid diffusion welding of the disc welds all the blades on the blisk to obtain the whole blisk, wherein the blades and the blisk are made of alloys of different materials. The discharge plasma diffusion welding method is used to solve the difficult problem of manufacturing blisks and high scrap rate, give full play to the complementary advantages of dissimilar alloys in performance and economy, and meet the needs of aero-engines for high-performance blisks.

Description

technical field [0001] The invention relates to the technical field of aviation manufacturing, in particular to a method for manufacturing a heterogeneous alloy integral blisk structure. Background technique [0002] In the field of aviation manufacturing technology, at present, the manufacturing methods of the overall blisk mainly include machining, fusion welding, linear friction welding, and hot-pressed diffusion welding. However, these manufacturing methods have certain shortcomings and limitations, as follows: [0003] (1) The overall mechanical processing increases the size and weight of the forging blank material, the material utilization rate is low, the processing difficulty is high, the product qualification rate is low, and the production cost is high, and it is only suitable for manufacturing the overall blisk of the same material. [0004] (3) The joint structure of fusion welding is cast structure, which is prone to defects such as pores, slag inclusions, unwel...

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Problems solved by technology

[0003] (1) The overall mechanical processing increases the size and weight of the forging blank material, the material utilization rate is low, the processing is difficult, the product qualification rate is low, and the production cost is high, and it is only suitable for manufacturing the overall blisk of the same material

[0004] (3) The joint structure of fusion welding is cast structure, which is prone to defects such as pores, slag inclusions, unwelded, and coarse structure. The joint performance and structure consistency are poor, resulting in low joint reliability and low product qualification rate.

[0005] (4) Linear friction welding is not suitable for manufacturing integral blisks with cooling channels because the welded parts are subjected to a large upsetting force and require high strength and hardness.

[0006] (5) Hot-pressed diffusion welding can prepare complex-structure blisks, but it is heated as a whole. When preparing heterogeneous blisks, it is difficult to take into account the matching welding process of the two materials at the same time. The welding time is long and the base material Large performance loss

[0007] With the continuous improvement of aviation weapon equipment performance requirements, more and more new materials and new structures are used, which put forward higher requirements for aviation manufacturing technology including welding technology. The manufacturing methods of the above-mentioned existing technologies meet Unable to meet the manufacturing requirements of high-performance engine blisks

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