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Titanium alloy plate welding method for improving welding performance

A welding performance and welding method technology, applied in welding/welding/cutting items, welding equipment, laser welding equipment, etc., to reduce the tendency of welding porosity, improve strength and plastic toughness, and improve the effect of thermal roughening

Active Publication Date: 2022-03-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the welding problem of titanium alloy plates and provide a welding method for titanium alloy plates with low process cost, simple process, high efficiency and good joint quality

Method used

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  • Titanium alloy plate welding method for improving welding performance
  • Titanium alloy plate welding method for improving welding performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for welding titanium alloy plates that improves weldability, the steps of which are as follows:

[0043] S1. Take a Ti6Al4V titanium alloy sheet with a thickness of 3mm, and open a V-shaped welding groove on the part to be welded of the titanium alloy sheet to form a butt joint. The groove angle of the welding groove is about 21°, and the upper opening width of the groove is 1.0 mm, the groove clearance is 0mm-1mm, and the blunt edge of the groove is 0.3mm;

[0044] S2. Weigh the metal particles according to the mass percentage of 6wt% Al, 4wt% V, 0.1wt% Ce, and the balance is Ti, prepare the alloy ingot by vacuum induction melting, and then utilize the method of electric discharge wire cutting to prepare the alloy ingot into the same The transition layer for welding groove adaptation of titanium alloy plates;

[0045] The specific method for preparing alloy ingots by vacuum induction melting is as follows:

[0046] S21. Put the weighed metal particles into t...

Embodiment 2

[0053] The technical features of this embodiment are basically the same as those of Embodiment 1, the only difference being that the mass percentage of cerium in the transition layer of this embodiment is 0.3%.

Embodiment 3

[0055] The technical features of this embodiment are basically the same as those of Embodiment 1, the only difference being that the mass percentage of cerium in the transition layer of this embodiment is 0.5%.

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Abstract

A titanium alloy plate welding method capable of improving welding performance comprises the following steps that S1, a Ti6Al4V titanium alloy plate with the thickness ranging from 2 mm to 4 mm is taken, a V-shaped welding groove is formed in the position to be welded, a butt joint is formed, the groove angle of the welding groove ranges from 18 degrees to 22 degrees, the width of an upper opening of the groove ranges from 0.8 mm to 1.2 mm, the groove gap ranges from 0 mm to 1 mm, and the truncated edge of the groove ranges from 0.1 mm to 0.5 mm; s2, metal particles are weighed according to the mass percent of 6wt% of Al, 4wt% of V, 0.1-0.7 wt% of Ce and the balance Ti, an alloy ingot is prepared through vacuum induction melting, and then the alloy ingot is machined into a transition layer matched with the welding groove; s3, the transition layer is placed in a welding groove of the Ti6Al4V titanium alloy plate butt joint, and a to-be-welded welding joint is formed; s4, pulse laser welding is conducted on the to-be-welded welding joint; according to the welding process parameters, the pulse frequency ranges from 20 Hz to 30 Hz, the pulse width ranges from 23 ms to 27 ms, the welding speed ranges from 22 mm / s to 28 mm / s, the laser base value power ranges from 2800 W to 3200 W, the laser peak power ranges from 3800 W to 4200 W, and the protective argon flow ranges from 12 L / min to 20 L / min. The welding method is low in cost, high in efficiency and good in joint quality, and the obtained welding seam is excellent in performance.

Description

technical field [0001] The invention relates to a welding method for titanium alloy plates which improves welding performance, and belongs to the technical field of titanium alloy welding. Background technique [0002] Titanium alloy is an excellent structural material with the characteristics of low density, high strength and good high and low temperature performance. It is widely used in aerospace, chemical industry, instrument manufacturing and other fields. Titanium is very stable in air at normal temperature. When it is heated, it begins to react with oxygen in the air to form a dense oxide film. When the temperature exceeds 500 degrees, the oxide film becomes porous, thickens and easily peels off. Oxygen passes through the film. The small holes in the titanium alloy continue to diffuse inward, which makes the plasticity of the titanium alloy lower. [0003] Pulse laser welding is a welding method that uses pulsed laser as energy to bombard the weldment with heat gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/24B23K26/14B23K26/60B23K33/00C22C14/00C22C1/02B23K103/14
CPCB23K26/24B23K26/14B23K26/60B23K33/004C22C14/00C22C1/02B23K2103/14Y02P10/25
Inventor 徐轶蒋哲亮陈辉
Owner SOUTHWEST JIAOTONG UNIV
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