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An Ultrasonic-Assisted Aluminum Alloy Welding Method to Obtain Full Solid Solution Joints in a Short Time

An ultrasonic-assisted, welding method technology, applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of reduced mechanical strength of the joint structure, poor joint structure performance, and decline in the performance of the base material during heat preservation time and heat preservation temperature.

Active Publication Date: 2020-10-27
东莞市新玛博创超声波科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the existing low-temperature ultrasonic-assisted aluminum alloy welding methods can achieve low-temperature welding in the atmospheric environment, the welding time is long, and the welding time takes several minutes or longer, and the obtained joint structure contains brittle intermetallic Compound or intermetallic compound layer, which reduces the mechanical strength of the welded joint structure
In the existing welding process, if the holding time is too long or the holding temperature is too high, the performance of the base metal will be reduced, resulting in relatively poor performance of the welded joint structure

Method used

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  • An Ultrasonic-Assisted Aluminum Alloy Welding Method to Obtain Full Solid Solution Joints in a Short Time
  • An Ultrasonic-Assisted Aluminum Alloy Welding Method to Obtain Full Solid Solution Joints in a Short Time
  • An Ultrasonic-Assisted Aluminum Alloy Welding Method to Obtain Full Solid Solution Joints in a Short Time

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Experimental program
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Effect test

Embodiment 1

[0062] An ultrasonic-assisted aluminum alloy welding method for obtaining a full solid solution joint in a short period of time, comprising a base material 3 to be welded and an intermediate reaction material layer 2, comprising the following steps:

[0063] Intermediate reaction material layer screening step, condition 1, the melting temperature of the intermediate reaction material layer 2 is lower than the melting point of the base material 3 to be welded by 195-205 ° C, or the common element between the intermediate reaction material layer 2 and the base material 3 to be welded The crystallization temperature is 150-300°C lower than the melting point of the base metal 3 to be welded. Condition 2: The maximum solid solubility between the intermediate reaction material layer 2 and the main elements of the base material 3 to be welded reaches at least 10%. Condition 3: The intermediate reaction material The maximum atomic radius difference between the main elements of layer 2 ...

Embodiment 2

[0124] The main structure, principle and effect of this embodiment are the same as those of Embodiment 1, and will not be repeated here. The difference is that in the pre-coating step of the intermediate reaction material layer, the heating device 4 raises the temperature of the 85Zn-15Al alloy to 460 °C,

[0125] In the second step of removing the oxide film on the base metal to be welded, the reaction temperature of the 85Zn-15Al alloy solder layer is controlled at 390°C, and the action time of welding ultrasonic waves applied to the components to be welded is controlled at 3 seconds.

[0126] α-Al grain precipitation step, α-Al grain growth step, full α-Al solid solution joint formation step and full α-Al solid solution joint composition uniform step, the reaction temperature of the 85Zn-15Al alloy liquid phase layer is controlled at 450°C , the total time of the ultrasonic action of the welding ultrasonic wave applied to the components to be welded is controlled at 60 seco...

Embodiment 3

[0128] The main structure, principle and effect of this embodiment are the same as those of Embodiment 2, and will not be repeated here. The difference is that in the pre-coating step of the intermediate reaction material layer, the heating device 4 raises the temperature of the 85Zn-15Al alloy to 460 °C,

[0129] In the second step of removing the oxide film on the base metal to be welded, the reaction temperature of the 85Zn-15Al alloy solder layer is controlled at 390°C, and the action time of welding ultrasonic waves applied to the components to be welded is controlled at 3 seconds.

[0130] α-Al grain precipitation step, α-Al grain growth step, full α-Al solid solution joint formation step and full α-Al solid solution joint composition uniform step, the reaction temperature of the 85Zn-15Al alloy liquid phase layer is controlled at 480°C , the total time of the ultrasonic action of the welding ultrasonic wave applied to the components to be welded is controlled at 60 seco...

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Abstract

The invention discloses an ultrasound-assisted aluminum alloy welding method capable of obtaining a full solid solution connector in a short time. The method comprises the following steps that to-be-welded parent metal and an intermediate reaction material layer are included, aluminum alloy serves as the to-be-welded parent metal, and the intermediate reaction material layer is made of 85Zn-15Al alloy; the weld interface of the to-be-welded parent metal is subjected to mechanical polishing and ultrasonic cleaning; then, the intermediate reaction material layer is precoated, the to-be-welded parent metal precoated with brazing filler metal and the to-be-welded parent metal without being precoated with brazing filler metal are assembled to form a to-be-welded assembly, an ultrasonic tool puts pressure on the to-be-welded assembly, the pressure value is 0.1-0.2MPa, the temperature is increased to 450-480 DEG C, welding ultrasonic vibration lasts for 60s, and the assembly is subjected to air cooling to the room temperature. According to the welding method, welding is completed within the second short time, and the high-mechanical-strength full solid solution connector free of brittle structures is obtained.

Description

technical field [0001] The invention relates to the technical field of ultrasonic welding of aluminum alloys and aluminum-based composite materials, in particular to an ultrasonic-assisted aluminum alloy welding method for obtaining full solid solution joints in a short period of time. Background technique [0002] Aluminum alloy is a typical lightweight material with low density, high specific strength and high specific stiffness. Its processing and application can reduce the quality of mechanical structures on the basis of ensuring mechanical properties, so as to realize the lightweight of structural parts. Therefore, it is widely used in aerospace, automobile, rail transit, electronics and other fields to achieve the purpose of reducing the weight of parts. [0003] The high-performance manufacturing of structural parts made of lightweight materials is inseparable from the support of mature welding technology. However, the current light alloy welding technologies such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K20/10B23K20/22B23K20/24
CPCB23K20/10B23K20/22B23K20/24
Inventor 赖志伟
Owner 东莞市新玛博创超声波科技有限公司
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