High-silicon aluminum alloy welding method for forming particle-reinforced weld joints through thermo-acoustic coupling

A high-silicon aluminum alloy, particle-reinforced technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc.

Inactive Publication Date: 2016-01-27
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is carried out in the atmospheric environment, which not only improves the influence of the oxide film on the weld structure, but also improves the wettability of the solder to the base metal, and changes the situation that the high silicon content in other welding methods is easy to cause welding cracks. , On the contrary, it becomes the reinforcing phase in the welding structure, realizing the high-strength and reliable connection of difficult-to-weld high-silicon aluminum alloys (silicon content 10%-90%)

Method used

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  • High-silicon aluminum alloy welding method for forming particle-reinforced weld joints through thermo-acoustic coupling
  • High-silicon aluminum alloy welding method for forming particle-reinforced weld joints through thermo-acoustic coupling

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Effect test

Embodiment 1

[0038] A welding method for high-silicon aluminum alloys that forms particle-reinforced welds through acoustic-thermal coupling control, using the coupling of ultrasonic waves and external heat sources to allow Si particles of the reinforcing phase in high-silicon aluminum alloys with a silicon mass content of 30% to enter the weld to form particles Enhanced composite weld structure, the steps are as follows:

[0039] 1. Before welding, use sandpaper to remove the oil impurities and oxide film on the surface of the solder Sn9Zn and the high-silicon aluminum alloy with a silicon mass content of 30% to be welded, then polish it, and then scrub the surface with acetone;

[0040] Two, step 1) obtains the high-silicon aluminum alloy and brazing filler metal to be welded silicon mass content 30% according to figure 1 Clamping in the manner shown;

[0041]3. Heat the high-silicon aluminum alloy to be welded and the brazing material clamped according to step 2) with an external heati...

Embodiment 2

[0043] Embodiment 2: The difference between this embodiment and Embodiment 1 is: Step 1: Sn-xZn solder is changed to Zn-Al (x=0-50) solder, heated to a predetermined temperature of 330-470 ± 10 ° C, other steps Same as embodiment one;

Embodiment 3

[0044] Embodiment 3: The difference between this embodiment and one of Embodiments 1 to 2 is that the solder in step 1 is Sn-In, heated to a predetermined temperature of 70-270±10°C, and the others are the same as Embodiments 1 to 2;

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Abstract

The invention belongs to the technical field of material welding and connection, and particularly relates to a high-silicon aluminum alloy welding method for forming particle-reinforced weld joints through thermo-acoustic coupling. The method mainly solves the problems that in the high-silicon aluminum alloy welding process, because the affinity of aluminum and oxygen is high, generated refractory substance oxidation films have adverse effects on weld joint fusion and silicon cracks and agglomeration growth are caused when a large amount of silicon is contained in high-silicon aluminum alloy. The method includes the steps of conducting medium and low temperature welding on high-silicon aluminum alloy through brazing filler metal under the atmosphere condition under the effects of an external heating source and ultrasounds, the reinforcing phase Si in high-silicon aluminum alloy is made to enter weld joints to form particle-reinforced composite weld joint structures through thermo-acoustic coupling, and therefore high-strength and reliable connection of high-silicon aluminum alloy difficult to weld is achieved.

Description

technical field [0001] The invention belongs to the technical field of material welding and connection, in particular to a high-silicon aluminum alloy welding method for forming particle-reinforced welds through coupling of multiple physical fields. Background technique [0002] High-silicon aluminum alloys have many advantages such as small thermal expansion coefficient, good mechanical properties, easy precision processing, and stable dimensions. These excellent alloy properties determine that high-silicon aluminum alloys will have a wide range of development and applications in many fields. till this moment. High-silicon aluminum alloys have been widely used in high-tech fields such as aerospace, aviation, automobiles, and space technology. Applications. For example, Al-25% Si alloys are widely used in the manufacture of pistons with light weight, good wear resistance, and small thermal expansion coefficient. At the same time, high-silicon aluminum alloys have been deep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/06B23K1/20B23K1/19B23K103/10
CPCB23K1/06B23K1/19B23K1/20B23K2103/10
Inventor 王谦朱琳周小玉
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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