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Laser welding method for titanium alloy sandwiched brazed plates

A laser welding and titanium alloy technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of poor fatigue performance of the overall structure, affecting the integrity of the overall structure, etc., to achieve laser welding process optimization, weld seam Well-organized, quality-enhancing effects

Active Publication Date: 2018-08-14
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using the riveting method, since the manufacture of the rivet holes seriously affects the integrity of the overall structure, the fatigue performance of the overall structure is not good

Method used

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  • Laser welding method for titanium alloy sandwiched brazed plates
  • Laser welding method for titanium alloy sandwiched brazed plates
  • Laser welding method for titanium alloy sandwiched brazed plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In the first step, 1.0mm thick TC4 titanium alloy plate 1 is used as the upper and lower skin brazing base materials, and titanium-based high-temperature solder 3 is selected as the connecting solder between the double-layer plates, preferably Ti-15Cu-25Ni . Cut the TC1 titanium alloy strip 2 with a thickness of 0.05mm into a long strip with a width of 5mm, and set it at the welding seam position, such as image 3 shown. After the setting is completed, it is heated in a vacuum furnace to melt the solder, and the upper and lower layers of base metal are connected together to form a double-layer brazing sheet.

[0043] In the second step, after two or more double-layer brazing sheets are formed, when they are spliced ​​into a whole by laser welding, firstly, a layer of titanium alloy powder 5 with a composition of TC4 is coated on the surface of the welding bead, and the powder composition is TC4 titanium alloy powder, BaF 2 , NaF 2 Mix according to the mass ratio of ...

Embodiment 2

[0045] In the first step, 1.0mm thick TC4 titanium alloy plate 1 is used as the upper and lower skin brazing base materials, and titanium-based high-temperature solder 3 is selected as the connecting solder between the double-layer plates, preferably Ti-15Cu-25Ni . Cut the TC1 titanium alloy strip 2 with a thickness of 0.05mm into a long strip with a width of 5mm, and set it at the welding seam position, such as image 3 shown. After the setting is completed, it is heated in a vacuum furnace to melt the solder, and the upper and lower layers of base metal are connected together to form a double-layer brazing sheet.

[0046] In the second step, after two or more double-layer brazing sheets are formed, when they are spliced ​​into a whole by laser welding, firstly, a layer of titanium alloy powder 5 with a composition of TC4 is coated on the surface of the welding bead, and the powder composition is TC4 titanium alloy powder, BaF 2 , NaF 2 Mix according to the mass ratio of ...

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Abstract

The invention provides a laser welding method for titanium alloy sandwiched brazed plates. The laser welding method for the titanium alloy sandwiched brazed plates comprises the steps that while brazing is carried out through titanium-based high-temperature brazing filler metal with titanium alloy plates as base metal, a weld joint of the to-be-subjected to laser welding part between the titaniumalloy plates is filled with a titanium thin strip so that the titanium-based high-temperature brazing filler metal can be locally blocked, and accordingly brazed plates to be subjected to laser welding are obtained; and laser welding is carried out on the brazed plates to be subjected to laser welding through a laser-welding process. According to the method, the titanium thin strip fills the spacebetween the brazed titanium alloy plates to form a blocking strip, then laser welding is carried out on the multiple layers of brazed plates at the portions of the blocking strips through the laser welding process, the purpose of laser welding of the titanium alloy sandwiched brazed plates is achieved, the laser welding process is optimized, the welding quality is improved, and the weld joint hasgood texture.

Description

technical field [0001] The invention relates to the technical field of laser processing, in particular to a laser welding method for titanium alloy interlayer brazing plates. Background technique [0002] Structural parts of wall panels are commonly used in aviation and aerospace engineering applications. Titanium alloy materials are widely used in thin-walled wall panel structures due to their excellent specific strength, specific stiffness, corrosion resistance and high impact toughness. The aerodynamic skin of aircraft such as airplanes and rockets. Aviation and aerospace structural parts generally have extremely strict weight requirements, so cavity structures often appear in the design and manufacture of structural parts. The brazing method can be used to realize the connection between the upper and lower layers or between layers to achieve a closed cavity structure. [0003] After adopting the multi-layer brazing method to form a closed cavity structure, the connecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/24B23K26/32B23K26/14
CPCB23K26/14B23K26/24B23K26/32
Inventor 王彬巩水利陈俐陈新松
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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