Manufacturing of composite sandwich nozzle by dynamic pressurizing transient liquid phase diffusion welding

A technology of diffusion welding and transition fluid, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of low welding strength, low welding rate, long cycle, etc., and achieve the goal of improving welding rate and fatigue life Effect

Inactive Publication Date: 2010-01-27
北京智创联合科技股份有限公司
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Problems solved by technology

[0003] At present, there are two main ways to manufacture composite sandwich structure nozzles: one is to generate the outer wall by electroforming on the inner wall of the groove. It is a cast structure with poor strength, plasticity and fatigue properties; the second is to weld the inner and outer walls processed in advance by vacuum brazing, electron beam welding and other methods, and the inner and outer walls of the composite sandwich structure nozzle manufactured by these welding The welding strength between the interlayers is relatively low, and the welding rate is also low, and the brazing method is also easy to block the channel of the interlayer

Method used

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  • Manufacturing of composite sandwich nozzle by dynamic pressurizing transient liquid phase diffusion welding
  • Manufacturing of composite sandwich nozzle by dynamic pressurizing transient liquid phase diffusion welding

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Embodiment Construction

[0023] 1. According to the size of the inner wall and the outer wall of the groove, the inner wall and the outer wall of the groove are respectively processed (at this time, the inner wall and the outer wall of the groove need to be compensated in the diameter direction to make up for the difference in the dynamic pressure diffusion welding. Δ φ bulging amount);

[0024] 2. Fully clean the inner and outer walls of the groove to remove all dust, oil and other debris on the surface;

[0025] 3. Surface modification treatment is carried out on the outer surface of the inner wall of the groove and the inner surface of the outer wall by means of ion implantation, vapor deposition, coating, etc. (this modified layer will form a transitional liquid phase during diffusion welding for welding, and the thickness of the modified layer is between 0.003 ~ 0.02mm range);

[0026] 4. Assemble the inner and outer walls and diffusion welding tooling according to a certain assembly relationshi...

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Abstract

The invention realizes the manufacturing of a composite sandwich structured nozzle by a dynamic pressurizing transient liquid phase diffusion welding method; the composite sandwich structured nozzle manufactured by the invention has advantages of long fatigue life, strong compression capacity, high welding rate, short manufacturing cycle, no blocking in the passageway and the like. The composite sandwich structured nozzle between materials of the same type can be manufactured by utilizing the invention, and the composite sandwich structured nozzle between materials of different types can also be manufactured, thus providing composite sandwich structured nozzle products with good performance for related industries.

Description

1. Technical field [0001] The invention can be applied to the manufacture of liquid rocket engine nozzles, and can also be used for other components that need to realize the sandwich structure by welding. 2. Background technology [0002] Composite sandwich structure nozzle is a common structure of liquid rocket engine nozzle, which is usually composed of grooved inner wall and outer wall through welding. [0003] At present, there are two main ways to manufacture composite sandwich structure nozzles: one is to generate the outer wall by electroforming on the inner wall of the groove. It is a cast structure with poor strength, plasticity and fatigue properties; the second is to weld the inner and outer walls processed in advance by vacuum brazing, electron beam welding and other methods, and the inner and outer walls of the composite sandwich structure nozzle manufactured by these welding The welding strength between the interlayers is relatively low, and the welding rate i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K31/02
Inventor 杨建国吴维贵
Owner 北京智创联合科技股份有限公司
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