A kind of preparation method of active cooling structure

Abstract

The invention discloses a method for preparing an active cooling structure, which includes the following operations: 1) rolling a stainless steel substrate into an inner cylinder as a high-temperature gas flow channel; 2) using laser, high-pressure water or wire cutting to make stainless steel ribs; 3) ) roll the alloy cover plate into an outer cylinder that matches the inner cylinder, and then cut the outer cylinder into several pieces along the axial direction; 4) place the inner support in the inner cylinder, and place the prepared ribs 5) Apply paste-like solder on the bottom of one side of the rib, and then fix the amorphous foil-like solder on the inner surface of the outer tube corresponding to the rib; 6) Vacuum brazing at 900°C-1020°C. The cooling channel ribs adopted in the present invention are first cut in batches and then integrally vacuum brazed, which can greatly reduce the processing time of the cooling channel in the active cooling structure, improve the processing efficiency of the overall components, and reduce the processing cost.

Description

A kind of preparation method of active cooling structure technical field [0001] The invention belongs to the technical field of precision machining, and relates to a preparation method of an active cooling structure. Background technique [0002] The hot-end components of the super engine often have to withstand severe high temperature (2300 ° C), high pressure (20 MPa) operating conditions, It is generally necessary to design an active cooling structure to achieve the cooling effect. Existing active cooling structures are generally made of superalloy outside The skin is constructed with a stainless steel housing with internal cooling channels. The method of processing this active cooling structure at present is mainly: firstly mill the surface of the inner shell to produce a cooling strip with ribs [0003] The cooling groove is then connected with the outer skin to form a cooling structure. The above method has the following disadvantages: 1) Since the inner cooling ...

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Problems solved by technology

The above method has the following disadvantages: 1) Since the internal cooling channels need to be milled one by one on the machine tool, it takes a long time, and the next process can only be carried out after all the cooling channels are milled, which greatly reduces the overall structural components. 2) When the shape of the cooling channel is complex, the milling process is also difficult, and the geometric dimension accuracy of the internal cooling channel cannot be guaranteed; 3) When the size of the active cooling structure is large When the value is large, there will be a large deformation in the machining inner cooling channel

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