High temperature alloy complex groove structure panel and flange liquid phase diffusion connecting method

A high temperature titanium alloy, liquid phase diffusion technology, applied in welding equipment, welding equipment, auxiliary welding equipment, etc., can solve the problems of welding parts deformation, injection hole deformation, affecting product performance, etc., to achieve firm and reliable connection, guarantee The effect of close contact and improved welding quality

Inactive Publication Date: 2008-03-26
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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AI Technical Summary

Problems solved by technology

But there is no report on the welding method of injector with labyrinth complex channel structure
The welding difficulties of this structure are as follows: 1. The panel is a complex labyrinth groove structure, which forms a complex labyrinth channel structure after connecting with the flange, and the connection form is surface contact connection, which cannot be welded at all by ordinary fusion welding methods
2. There are a large number of small holes with a diameter of 0.1mm distributed on the panel, and the common brazing method is easy to cause the solder to flow into the injection holes and cause blockage
3. Ordinary pressurized solid-state diffusion welding is easy to deform the welded parts due to the high welding pressure required, which will lead to deformation of the injection hole and affect the performance of the product

Method used

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  • High temperature alloy complex groove structure panel and flange liquid phase diffusion connecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] (1) Perform pre-weld surface treatment on the high-temperature titanium alloy complex groove structure panels and flanges of the welded parts: use a detergent to remove oil stains on the surface of the welded parts, and pickle the surface of the welded parts.

[0010] (2) Pre-place the ultra-thin high-strength titanium alloy layer of the middle layer material between the panel and the flange before welding: spot-weld the ultra-thin high-strength titanium alloy layer of the middle layer material on the high-temperature titanium alloy with a low-power energy storage spot welding equipment The surface of complex grooved structural panels or flanges.

[0011] (3) Assemble the parts to be welded on the welding fixture: place the assembled panel 1 and flange 2 on the lower splint 5 of the welding fixture, then place the spacer 4 on the panel 1, and then press the upper splint 6 On the spacer 4, the upper splint 6 and the lower splint 5 are connected by bolts 7, and the nuts 8...

Embodiment 2

[0015] The difference from Example 1 is that the connection temperature in step (4) is 960° C., and the holding time is 50 minutes; the diffusion treatment temperature after solidification is 850° C., and the holding time is 90 minutes.

Embodiment 3

[0017] The difference from Example 1 is that the connection temperature in step (4) is 980° C., and the holding time is 60 minutes; the diffusion treatment temperature after solidification is 900° C., and the holding time is 180 minutes.

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Abstract

The liquid phase diffusion process for connecting high temperature titanium alloy panel in complicated channel structure and flange includes the following steps: 1. surface treatment of the panel and the flange before welding; 2. sot welding the interlayer material onto the surface of the panel or the flange; 3. fixing the welded parts with welding fixture; and 4. setting inside a vacuum furnace, heating to melt the interlayer material, maintaining the temperature for connection, maintaining at the diffusion temperature after solidification for certain time and cooling inside the furnace. The process realizes the effective connection between high temperature titanium alloy panel in complicated channel structure and flange.

Description

technical field [0001] The invention relates to a liquid-phase diffusion connection method between a high-temperature titanium alloy complex groove structure panel and a flange, in particular to a high-temperature titanium alloy complex groove structure panel and a flange liquid-phase diffusion connection suitable for an engine head injector method. Background technique [0002] At present, in the research of the injector of the engine head, according to the different design structures of the injector of the engine head, the brazing of stainless steel structure, the diffusion welding of stainless steel and titanium alloy laminate structure, etc. have been carried out. But there is no report on the welding method of injector with labyrinth complex channel structure. The welding difficulties of this structure are as follows: 1. The panel is a complex labyrinth groove structure, which forms a complex labyrinth channel structure after being connected with the flange. The connec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/16B23K20/26B23K37/053
Inventor 毛建英李海刚宁立芹梁德彬
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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