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Alloy three-layer structure surface groove control method

A technology of three-layer structure and control method, which is applied in the field of surface groove defect control of superplastic formed three-layer structural parts for aerospace. Groove defects etc.

Active Publication Date: 2017-12-15
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Laser welding / superplastic forming three-layer structure core wave crest and skin laser welding are prone to surface groove defects due to inward tensile stress. Surface groove defects make it difficult for the three-layer structure to meet the surface flatness requirements, affecting its Therefore, it is urgent to propose a method for surface groove defect control

Method used

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  • Alloy three-layer structure surface groove control method
  • Alloy three-layer structure surface groove control method
  • Alloy three-layer structure surface groove control method

Examples

Experimental program
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Effect test

Embodiment 1

[0095] A kind of Ti 2 AlNb alloy laser welding / superplastic forming three-layer structure surface groove control method, such as figure 1 As shown, the three-layer structure is a sandwich structure consisting of a core layer and skins on both sides of the core layer. Solder connection;

[0096] The steps of the method include:

[0097] (1) For Ti 2 AlNb alloy is used for material selection, the thickness of the selected skin is T=2mm, and the thickness of the core layer is t=1mm;

[0098] (2) Laser welding the core layer and the skin;

[0099] Such as Figure 4 As shown, when welding, use 3 parallel laser welds at the same welding position, and the shortest distance between adjacent welding positions on the same side is L=50mm, H=40mm, l=6mm;

[0100] (3) superplastic molding is carried out to the core layer and skin after step (2) laser welding;

[0101] The superplastic forming temperature is 960°C, the superplastic forming pressure is P=25Bar, and the superplastic fo...

Embodiment 2

[0104] A kind of Ti 2 AlNb alloy laser welding / superplastic forming three-layer structure surface groove control method, such as figure 1 As shown, the three-layer structure is a sandwich structure consisting of a core layer and skins on both sides of the core layer. Solder connection;

[0105] The steps of the method include:

[0106] (1) For Ti 2 AlNb alloy is selected, the thickness of the selected skin is T=1mm, the thickness of the core layer is t=1mm; add auxiliary materials on the skin, the thickness of the auxiliary materials is T f = 1 mm;

[0107] (2) Laser welding the auxiliary material and the skin, as well as the auxiliary material and the core layer;

[0108] Such as Figure 4 As shown, when welding, use 3 parallel laser welds at the same welding position, and the shortest distance between adjacent welding positions on the same side is L=50mm, H=40mm, l=6mm;

[0109] (3) Carry out superplastic molding to the core layer, skin and accessories after step (2) ...

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Abstract

The invention relates to a Ti2AlNb alloy laser welding / superplastic forming three-layer structure surface groove control method, belongs to the technical field of three-layer structure superplastic forming, and is suitable for surface groove defect control of superplastic forming three-layer structure parts for aerospace. The method can realize surface groove control of a Ti2AlNb alloy laser welding / superplastic forming three-layer structure, and can control the surface groove depth of the three-layer structure to be not higher than 0.3 mm; and the surface groove control method is suitable for Ti2AlNb alloy laser welding / superplastic forming three-layer structures with different cover-core thickness ratios, different welding line widths and different formed cover-core included angles.

Description

technical field [0001] The present invention relates to a kind of Ti 2 The invention discloses an AlNb alloy laser welding / superplastic forming three-layer structure surface groove control method, which belongs to the technical field of three-layer structure superplastic forming, and is applicable to the surface groove defect control of superplastic forming three-layer structure parts for aerospace. Background technique [0002] At present, aerospace product parts are developing in the direction of lightweight, complex and integrated. The superplastic forming / diffusion link (SPF / DB) combined process technology can manufacture a multi-layer hollow sandwich structure with complex shape and surface and internal reinforcement reinforcement, which is unique in reducing component weight, improving structural integrity and improving body load-bearing efficiency. Technical advantages. However, during the superplastic forming / diffusion bonding (SPF / DB) process, the components exper...

Claims

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Application Information

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IPC IPC(8): B21D26/027B21D26/053B21D39/02
CPCB21D26/027B21D26/053B21D39/028
Inventor 姚为刘奇李保永闫寒吴凯秦中环徐凯刘伟李信
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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