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Method for manufacturing aluminum alloy flux-cored wire by utilizing powder sheath extrusion blank-making method

A technology of flux-cored welding wire and aluminum alloy, which is applied in the field of material engineering, can solve problems such as unstable filling coefficient of active agent, influence on welding quality, and uneven distribution, and achieve the effects of reducing cost increase, improving quality, and improving metallurgical quality

Active Publication Date: 2017-05-10
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem with the above two methods is that the filling factor of the active agent is unstable and unevenly distributed in the welding wire, which affects the welding quality
In order to make the composite ingot after pressing and sintering have a certain bonding strength to meet the requirements of subsequent processing, this method has high requirements on the matrix and active agent powder, and requires the use of ultrafine powder, so the process is difficult and costly

Method used

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  • Method for manufacturing aluminum alloy flux-cored wire by utilizing powder sheath extrusion blank-making method
  • Method for manufacturing aluminum alloy flux-cored wire by utilizing powder sheath extrusion blank-making method
  • Method for manufacturing aluminum alloy flux-cored wire by utilizing powder sheath extrusion blank-making method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare 1# aluminum alloy flux-cored welding wire, the composition and formulation are shown in Table 1. Among them: the mass fraction of Mg in the Al-Mg alloy powder is 50%, and the composition (wt.%) of the active agent is SiO 2 : 40%, MgF 2 :20%, CaCl 2 : 40%. The particle size of Al powder, Al-Mg alloy powder, and active agent are -100~+200 mesh.

[0020] Table 1 1# flux cored wire composition

[0021]

[0022] The steps of the manufacturing method of 1# aluminum alloy flux cored wire are:

[0023] 1. Mixed charging

[0024] The active agent, aluminum powder, and aluminum-magnesium alloy powder are ball-milled and mixed uniformly, and packed into an aluminum alloy sheath. The sheath is made of LF6 aluminum alloy with a diameter of φ120mm and a height of 140mm.

[0025] 2. Hot vacuum

[0026] Vacuum the powder jacket. When the vacuum degree reaches 10-1Pa level, start heating and keep warm. The heating temperature is 350℃, the holding time is 7h, and the vacuum degree in the ...

Embodiment 2

[0040] Prepare 2# flux-cored welding wire, as shown in Table 3. Wherein: the mass fraction of Mg in the Al-Mg alloy powder is 50%, and the composition (wt.%) of the active agent is SiO2: 30%, MgF2: 30%: CaCl2: 40%. The particle size of Al powder, Al-Mg alloy powder, and active agent are -100~+200 mesh.

[0041] Table 3 2# flux cored wire composition

[0042]

[0043] The steps of 2# aluminum alloy flux-cored welding wire manufacturing method are:

[0044] 1. Mixed charging

[0045] The active agent, aluminum powder, and aluminum-magnesium alloy powder are ball-milled and mixed uniformly, and packed into an aluminum sheath. The sheath is made of LF6 aluminum alloy with a diameter of φ120mm and a height of 140mm.

[0046] 2. Hot vacuum

[0047] Vacuum the powder jacket. When the vacuum degree reaches 10-1Pa level, start heating and keep warm. The heating temperature is 350℃, the holding time is 7h, and the vacuum degree in the jacket reaches 10-3Pa level, and then it is sealed.

[0048] 3...

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Abstract

The invention relates to a method for manufacturing an aluminum alloy flux-cored wire by utilizing a powder sheath extrusion blank-making method. The powder is composed of an activating agent, aluminum powder and aluminum magnesium alloy powder. A sheath is made from aluminum. The method comprises the following steps of: ball-milling and mixing the powder, and then filling into the sheath, heating and vacuumizing; performing thermal compressing, thermal extrusion, rolling and cold drawing, thereby acquiring a flux-cored wire. The flux-cored wire manufactured according to the method is characterized by uniform distribution of the activating agent in the flux-cored wire; the process is simple; the cost is lower; when the flux-cored wire manufactured according to the method provided by the invention is used for welding the aluminum magnesium alloy, the pre-welding cleaning process can be simplified and the weld porosity can be eliminated; the fusion depth is more than 1.6 times of the fusion depth achieved by using a common aluminum alloy welding stick for welding; the joint strength performance is excellent.

Description

Technical field [0001] The invention is a method for manufacturing aluminum alloy flux-cored welding wire by using a powder-coated extrusion blanking method, and belongs to the technical field of material engineering. Background technique [0002] Aluminum alloy flux-cored welding wire is a new and efficient welding material, which can improve the production efficiency and welding quality of aluminum and aluminum alloy welding. The common manufacturing processes of aluminum alloy flux-cored wire include strip rolling, strip coiling, round powder filling, tubular welding wire, ingot extrusion, powder synthesis, etc. [0003] Strip rolling, strip rolling, and coiling powder filling methods are all derived from the manufacture of flux-cored wire for arc welding steel, and all obtained are seam flux-cored wires. The flux in the wire is partially exposed, which is not conducive to storage , And it is not conducive to deep processing into thin diameter welding wire. [0004] Tubular weld...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/40B23K35/02B23K35/28
CPCB23K35/0266B23K35/286B23K35/406
Inventor 施瀚超郑涛周标熊华平陈由红
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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