Selective laser melting manufacturing process for annular array blade guide

Abstract

The invention relates to a selective laser melting manufacturing process for an annular array blade guide. The process comprises the steps of 1, model segment processing, specifically, an annular array blade guide three-dimensional model is equally divided into multiple sections; 2, material selection and setting of process parameters; 3, determining of a placing mode and designing of a support structure; 4, correcting of the size precision; 5, selective laser melting forming; 6, after-treatment, specifically, parts together with a base plate are placed into a vacuum heat treatment furnace, warm is kept for one hour at the temperature of 800 DEG C to eliminate residual stress, and then the parts are cut and the support structure is removed; and 7, welding, specifically, all the segmented parts are fixed on a welding fixture and welding is carried out to obtain an integral annular array blade guide part in an argon-arc welding or laser welding mode. The part size precision, stress deformation and surface roughness are well controlled in the process, mechanical performance of the parts is superior to traditional castings, the manufacturing cycle is short, and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of laser selective melting, in particular to a laser selective melting manufacturing process of an annular array vane guide. Background technique [0002] The annular array vane guide is an aero-engine part with a complex structure and a multi-blade structure in an annular array. Its working environment is high temperature and high pressure and requires good high temperature mechanical properties. Although the traditional casting process can complete the forming of its complex structure, the disadvantages such as many defects, poor mechanical properties, difficult manufacturing, long cycle time, and low yield rate are very significant. Compared with casting, laser selective melting process can not only form complex structures, but also has better mechanical properties than castings, and is fast and efficient. It is suitable for manufacturing annular array vane guides. However, there are still difficulties i...

AI Technical Summary

Problems solved by technology

However, there are still difficulties in manufacturing annular array vane guides by laser selective melting process: only a few large-scale laser selective melting equipment can manufacture annular array vane guides as a whole, and conventional equipment can only form segmented annular array vane guides and then weld them into a whole , other difficulties include obtaining the best quality process parameters, controlling the dimensional accuracy of parts, controlling the stress and deformation of parts, controlling the surface roughness of parts, and designing support structures that are easy to remove, etc.

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