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Sheath-coated flux-cored brazing wire and production method thereof

A brazing and flux-cored technology, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problem of difficult processing of high-strength flux-cored welding wire, and achieve the effect of avoiding uneven powder mixing and simple production method.

Inactive 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

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a new type of leather-wrapped composite flux-cored welding wire and its preparation method, and solve the problem of difficult processing of high-strength flux-cored welding wire

Method used

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  • Sheath-coated flux-cored brazing wire and production method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] The sheath of the new leather-wrapped flux-cored welding wire of the present invention is as shown in the schematic diagram of the welding wire structure. Sheath 1, the specification is 0.4×9mm4045 aluminum alloy strip, the sandwich wire 2 is φ0.1mm red copper wire, and the brazing flux 3 is raw material KF (2.51-48.36%) +AlF 3 (28.31~51.64%)+CsF (0~66.51%) mixture, the outer skin and the sandwich wire are melted to form an aluminum-silicon-copper alloy during the brazing process, and its composition is Si: 7-9%, Cu17-21%, and the balance is Al.

[0029] Wire preparation process:

[0030] 1. Process the 4045 aluminum alloy into an aluminum alloy strip with a thickness of 0.4mm and a width of 9mm;

[0031] 2. Roll the alloy strip into a U-shaped groove structure in the forming machine, add 21 red copper wires of φ0.1mm in the U-shaped groove, and then add the above-mentioned mixed flux, and finally synthesize O-shaped, and reduce the diameter to φ2. 4mm;

[0032] 3. A...

Embodiment 2

[0034] The sheath of the new leather-wrapped flux-cored welding wire of the present invention is such as the sheath 1 in the wire structure schematic diagram, the specification is 0.4×12mm4047 aluminum alloy strip, the sandwich wire 2 is brass wire of φ0.08mm, and the brazing flux 3 is raw material KF (2.51~48.36%) )+AlF 3 (28.31~51.64%)+CsF (0~66.51%) mixture, during the brazing process, the skin and the sandwich wire melt to form an aluminum-silicon-copper-zinc alloy, and its composition is Si7~10%, Cu20~24%, Zn4~6% balance for Al.

[0035] Wire preparation process:

[0036] 1. Process the 4047 aluminum alloy into an aluminum alloy strip with a thickness of 0.4mm and a width of 12mm;

[0037] 2. Roll the alloy strip into a U-shaped groove structure in the forming machine, add 20 φ0.08mm red copper wires into the U-shaped groove, and then add the above-mentioned mixed flux, and finally synthesize O-shaped, reduce the diameter to φ3. 2mm;

[0038] 3. After being reduced in...

Embodiment 3

[0040] The sheath of the new leather-wrapped flux-cored welding wire of the present invention is such as the sheath 1 in the wire structure schematic diagram, the specification is 0.6×10mm4045 aluminum alloy strip, the sandwich wire 2 is brass wire of φ0.12mm, and the brazing flux 3 is raw material KF (2.51~48.36%) )+AlF 3 (28.31~51.64%)+CsF (0~66.51%) mixture, during the brazing process, the skin and the sandwich wire melt to form an aluminum-silicon-copper-zinc alloy, and its composition is Si6~10%, Cu16~20%, Zn1~2% balance for Al.

[0041] Wire preparation process:

[0042] 1. Process the 4045 aluminum alloy into an aluminum alloy strip with a thickness of 0.6mm and a width of 10mm;

[0043] 2. Roll the alloy strip into a U-shaped groove structure in the forming machine, add 6 pieces of φ0.12mm red copper wires into the U-shaped groove, then add the above-mentioned mixed flux, and finally synthesize O-shaped, reduce the diameter to φ2. 6mm;

[0044] 3. After being reduc...

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Abstract

The invention discloses a sheath-coated flux-cored brazing wire and a production method thereof. The flux-cored wire is composed of an alloy sheath, sandwich wires and brazing flux, and is characterized in that compositions of the composite flux-cored wire are determined according to the proportion of the alloy sheath and the sandwich wires, the alloy sheath is 0.2-0.8mm in thickness, the sandwich wires are copper wires, brass wires and the like with the diameter phi of 0.02-0.2mm, and the brazing flux is potassium fluoroaluminate or cesium tetrafluoroaluminate complex, or a chemical compound which is synthesized from KF, AlF3 and CsF in an eutectic manner. When the novel wire is produced, sheath alloy is processed into an alloy strip 0.2-0.8mm in thickness and 6-16mm in width, the alloy strip is rolled into an U-shaped groove via a forming machine, the sandwich wires are put into the U-shaped groove, then the brazing flux is added, the diameter is reduced to phi 2.4-3.0mm after the wires and the brazing flux are synthesized to be O-shaped, diameter reducing is performed via a wire drawing machine unit, and the O-shaped product is fed into a wire rewinding machine to be produced into the novel sheath-coated flux-cored wire. The novel heath-coated flux-cored wire has the advantages that alloying effect of the alloy sheath and the sandwich wires is good during brazing, brazing seams are uniform in composition, joint strength is high, and the problem that part of high-performance brazing solder cannot be processed into the flux-cored wire easily is solved.

Description

technical field [0001] The invention relates to the field of brazing materials for welding, in particular to a novel leather-wrapped flux-cored brazing wire structure and a preparation method thereof. Background technique [0002] As a precise connection technology, brazing has the advantages of small deformation of the base metal, high dimensional accuracy, smooth and beautiful joints, and good air tightness. It is an important method for connecting aluminum alloys and aluminum-copper dissimilar metals. . During brazing, the weldments rely on the molten solder to fill the joint gap through wetting and capillary action, and diffuse with the base metal, and connect after solidification. Therefore, the quality of the weld depends largely on the brazing. material. [0003] The mechanical properties of joints, especially the tensile strength and shear strength, are important indicators for brazing. Traditional solder welding often has low weld strength and poor crack resistanc...

Claims

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Application Information

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IPC IPC(8): B23K35/368
CPCB23K35/368B23K35/3605B23K35/406
Inventor 陆汉龙欧阳剑雄徐龙江
Owner SHANGHAI LONGSHUO WELDING MATERIAL
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