A kind of brazing method of sealing seat assembly

Abstract

The invention relates to a brazing method of a hermetically sealed seat component and belongs to the technical field of manufacture of aircraft engine parts. The hermetically sealed seat component comprises a seat body and a guide pipe, wherein the seat body is made of titanium alloy materials; the guide pipe is made of stainless steel materials. As the welding is hard to perform by adopting a traditional fusion welding method, and the selection of solders, the setting of brazing process parameters, the brazing position sealing requirements, the assembling and the positioning of the seat sealing component in the brazing process and other aspects can be involved when the brazing method is adopted, a set of feasible brazing method is urgently needed to meet the production demands of the hermetically sealed seat component. The brazing method has the benefits that the invention overcomes the technical problems encountered by the hermetically sealed seat component in the brazing process and provides the solder with good weldability; meanwhile, the brazing process parameters are provided, the sealing requirements after brazing at brazing positions are ensured, the positioning precision during brazing is high, and smooth and continuous brazing seams can be obtained; the brazing method has the characteristics of strong maneuverability, high production efficiency and high brazing pass rate.

Description

technical field [0001] The invention belongs to the technical field of manufacturing aero-engine components, in particular to a brazing method for a sealing seat assembly. Background technique [0002] As an important part of the aero-engine, the sealing seat assembly is composed of a seat body and a conduit, the seat body is made of titanium alloy, and the conduit is made of stainless steel. The sealing seat assembly is a welded component, one end of the conduit is inserted horizontally into the upper mounting side hole of the seat body, the conduit body extends and bends along the outer wall of the seat and the lower mounting edge, and the other end of the conduit is vertically inserted into the lower mounting side hole of the seat body , and the two ends of the conduit and the seat body must be connected as one by brazing. [0003] However, in the actual brazing process of the catheter and the seat body, there will be unavoidable technical problems, that is, the welding ...

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Problems solved by technology

[0003] However, in the actual brazing process of the catheter and the seat body, there will be unavoidable technical problems, that is, the welding of titanium alloy and stainless steel dissimilar materials. Due to the large difference in physical and chemical properties between titanium alloy and stainless steel, especially the two The chemical composition of the pipe is completely different, and it is difficult to connect by the traditional welding method. Therefore, the brazing method must be used to connect the conduit and the seat body. However, the brazing method will involve the selection of brazing material, the setting of brazing process parameters and the brazing In many aspects, such as the sealing requirements of the solder joints, since the seat body is prone to deformation during the brazing process, the assembly and positioning requirements for the sealing seat components are also very high during the brazing process, so a set of practical brazing methods is urgently needed. Meet the production needs of sealing seat components

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