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Laser welding method for dissimilar materials of titanium alloy and aluminum alloy

A technology of laser welding and dissimilar materials, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., it can solve the problems of complex assembly, difficult to form effective connection, laser power limitation, etc., to prevent mixing and reaction , good quality, the effect of improving utilization

Pending Publication Date: 2021-12-31
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a laser welding method for dissimilar materials of titanium alloy and aluminum alloy, which solves the difficulties in forming effective connections in the Ti-Al laser welding process in the prior art, complicated assembly, strict cleaning before welding, pores, and cracks. , and at the same time limited by the laser power and other issues

Method used

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  • Laser welding method for dissimilar materials of titanium alloy and aluminum alloy
  • Laser welding method for dissimilar materials of titanium alloy and aluminum alloy
  • Laser welding method for dissimilar materials of titanium alloy and aluminum alloy

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Embodiment 1

[0032] see Figure 1 to Figure 3 Shown, the laser welding method of TC4 titanium alloy of the present invention and 6082 aluminum alloy dissimilar materials comprises the steps:

[0033] Step 1. Cleaning: Before welding the workpiece to be welded, perform a cleaning operation on the workpiece to be welded to obtain the cleaned workpiece to be welded;

[0034] Step 2. Assembly: Use the welding fixture to apply clamping force on the TC4 titanium alloy metal plate and 6082 aluminum alloy plate to be welded to fix the position of the laser;

[0035] Step 3. Set welding parameters: place the assembled workpiece in the fiber laser welding room, and adjust the laser welding process parameters;

[0036]Step 4. Welding: After adjusting the welding parameters, laser welding is performed on the workpiece to be welded. After the welding is completed, the workpiece is cooled naturally, and then the workpiece is taken out.

[0037] The purpose of the present invention is to break through ...

Embodiment 2

[0043] combine figure 2 To illustrate this embodiment, the thicknesses of the TC4 titanium alloy plate and the 6082 aluminum alloy plate to be welded in step 1 of this embodiment are both 1mm. The undisclosed technical features in this embodiment are the same as those in Embodiment 1.

Embodiment 3

[0045] combine figure 2 To illustrate this embodiment, the spot diameter in step 1 of this embodiment is 1.5mm, and the laser incident angle is 40 degrees. The undisclosed technical features in this embodiment are the same as those in Embodiment 1.

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Abstract

The invention relates to a laser welding method for dissimilar materials of a titanium alloy and an aluminum alloy, and belongs to the technical field of laser welding and high-entropy alloys. Firstly, a workpiece to be welded is cleaned, then the workpiece to be welded is placed on a clamp, clamping force is applied through the welding clamp, the incident angle of lasers is adjusted to be 40 degrees-45 degrees, base metal is in lap joint, a titanium plate is arranged at the upper portion, and an aluminum plate is arranged at the lower portion; and the assembled workpiece is placed in a fiber laser welding chamber, prepared high-entropy alloy powder is preset at a lap joint, after welding parameters are adjusted, a laser beam is aligned with the center of a welding seam, laser welding is conducted on the workpiece to be welded, the high-entropy alloy powder is firstly melted in the welding process, due to the fact that the laser beam completely irradiates the high-entropy alloy powder, reflection of the base metal to the lasers is avoided, the base metal is melted through heat convection and heat conduction by means of heat transmitted by a molten pool, the melting amount of the base metal is reduced, and natural cooling is achieved. The energy utilization rate is increased, and the laser weldability of the TC4 titanium alloy / 6082 aluminum alloy dissimilar materials is greatly improved.

Description

technical field [0001] The invention relates to the technical field of laser welding and the technical field of high-entropy alloys, in particular to a laser welding method for dissimilar materials of titanium alloy and aluminum alloy. Background technique [0002] Titanium alloy (Ti) and aluminum alloy (Al) have the advantages of low density, corrosion resistance, and excellent mechanical properties. They have broad application prospects in aerospace, weapon manufacturing, rail transportation and other fields. In order to combine the excellent properties of Ti alloys and Al alloys, more and more attention has been paid to the research on Ti-Al composite structures. However, due to the huge difference in material properties such as melting point, thermal conductivity, metallurgical properties, and crystal microstructure of the two materials, it is difficult to fabricate reliable Ti / Al joints and easy to form brittle Ti-Al intermetallic oxides (IMCs) . Brittle Ti-Al interm...

Claims

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Application Information

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IPC IPC(8): B23K26/21B23K26/70
CPCB23K26/21B23K26/702B23K2103/18
Inventor 谷晓燕张立辉谷晓鹏徐国成王文权
Owner JILIN UNIV
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