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Composite solder flux-cored aluminum welding wire and preparation method thereof

A technology of flux-cored aluminum welding wire and composite solder, which is applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of inability to prepare solder and difficult brazing, and achieve short alloying time and low melting point of solder , good wettability and fluidity

Active Publication Date: 2014-03-05
SHANGHAI LONGSHUO WELDING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inability to prepare solder with good process performance, it is difficult to apply to the brazing of actual structures.

Method used

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  • Composite solder flux-cored aluminum welding wire and preparation method thereof
  • Composite solder flux-cored aluminum welding wire and preparation method thereof
  • Composite solder flux-cored aluminum welding wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the metal composite solder cored aluminum welding wire in the present embodiment, the outer skin is a metal composite solder, such as image 3 As shown, the aluminum alloy layer 1 is 4045 aluminum alloy, and the copper layer 2 is Cu.

[0036] Its preparation method is:

[0037] According to the thickness ratio 4045: Cu: 4045=5:1:5, the 4045 aluminum alloy, copper and 4045 aluminum alloy are rolled into a composite strip through a rolling mill; the composite strip is thinned to 0.3-0.6mm, and the strip width is 9 ~12mm; the prepared composite strip is rolled into a U shape through a rolling mill; the U-shaped composite strip is rolled into an O shape after adding a drug core; the diameter is reduced to 2.4~3.0mm; continue to reduce the diameter and make Composite solder flux-cored aluminum welding wire with a diameter of 1.0-3.0mm. Among them, Cu accounts for 24.8% of the total weight of the solder, Si accounts for 8.5% of the total weight of the solder, and the res...

Embodiment 2

[0039] In the metal composite solder cored aluminum welding wire in the present embodiment, the outer skin is a metal composite solder, such as figure 2 As shown, the aluminum alloy layer 1 is Al-Si-Zn alloy, and the copper layer 2 is Cu. According to the thickness ratio of aluminum alloy layer: copper layer = 50:1, the Al-Si-Zn alloy and Cu are rolled into a composite strip through a rolling mill; the composite strip is thinned to 0.3~0.6mm, and the strip width is 9~ 12mm; the prepared composite strip is rolled into a U shape through a rolling mill; the U-shaped composite strip is rolled into an O shape after adding a drug core; the diameter is reduced to a diameter of 2.4-3.0mm; continue to reduce the diameter to make a diameter It is a composite solder flux-cored aluminum welding wire of 1.0-3.0mm. Among them, Cu accounts for 5% of the total weight of the solder, Si accounts for 10% of the total weight of the solder, Zn accounts for 6% of the total weight of the solder, a...

Embodiment 3

[0041] In the metal composite solder cored aluminum welding wire in the present embodiment, the outer skin is a metal composite solder, such as figure 2 As shown, the aluminum alloy layer 1 is Al-Si-Zn alloy, and the copper layer 2 is Cu. According to the thickness ratio of aluminum alloy layer: copper layer = 13:1, the Al-Si-Zn alloy and Cu are rolled into a composite strip through a rolling mill; the composite strip is thinned to 0.3~0.6mm, and the strip width is 9~ 12mm; the prepared composite strip is rolled into a U shape through a rolling mill; the U-shaped composite strip is rolled into an O shape after adding a drug core; the diameter is reduced to a diameter of 2.4-3.0mm; continue to reduce the diameter to make a diameter It is a composite solder flux-cored aluminum welding wire of 1.0-3.0mm. Among them, Cu accounts for 20% of the total weight of the solder, Si accounts for 10% of the total weight of the solder, Zn accounts for 5% of the total weight of the solder, ...

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Abstract

The invention discloses a composite solder flux-cored aluminum welding wire and a preparation method thereof. The composite solder flux aluminum welding wire comprises a sheath and a flux core filling the sheath. The sheath is made by rolling the alloy of Cu, Al and the like. The composite solder flux-cored aluminum welding wire and the preparation method thereof have the advantages that the sheath in the composite belt form replaces the traditional alloy sheath, good processability of the composite belt ensures processability of the composite solder flux-cored welding wire, and the problem that solder is hard to process into the flux-cored welding wire is solved.

Description

technical field [0001] The invention relates to a flux-cored welding wire suitable for brazing, in particular to a metal-composite flux-cored aluminum welding wire. The composite solder flux-cored wire has the advantage that conventional flux-cored wire processing methods cannot be processed, and has high strength and excellent brazing performance, and is suitable for medium-temperature brazing of high-strength aluminum alloys. Background technique [0002] Brazing is a welding technique that uses solder with a lower melting temperature than the base metal, adopts an operating temperature lower than the solidus of the base metal but higher than the liquidus of the solder, and connects the base metals together through the molten solder. . Brazing is one of the most effective means of joining aluminum alloys. With the increasing application of aluminum alloys, its brazing technology is becoming more and more important. In the automobile industry, substituting aluminum for st...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/286B23K35/406
Inventor 陆汉龙徐启迪徐龙江
Owner SHANGHAI LONGSHUO WELDING MATERIAL
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