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Aluminum alloy welding wire suitable for arc fuse additive manufacturing and preparation method thereof

An aluminum alloy welding wire and additive manufacturing technology, which is applied in the field of aluminum alloy welding wire, can solve the problems of heterogeneous nucleation dose limitation, etc., and achieve the effects of improving thermal fatigue resistance, refining matrix structure, and improving comprehensive mechanical properties

Active Publication Date: 2020-12-04
CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Based on the amount of micro-alloying elements added, there are certain restrictions on the amount of heterogeneous nucleation in the deposition process of special welding wires for additive manufacturing that have been published so far.

Method used

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  • Aluminum alloy welding wire suitable for arc fuse additive manufacturing and preparation method thereof
  • Aluminum alloy welding wire suitable for arc fuse additive manufacturing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] An aluminum alloy welding wire suitable for the additive manufacturing of arc fuses, consisting of an outer sheathed aluminum strip and an inner core powder. The aluminum strip is a 4047 aluminum strip. The powder includes the following components in mass percentage: Mg powder is 3.0%, Ge powder is 1.0%, ceramic particles are TiC and is 10%, and the balance is Al powder, wherein the particle size range of Mg, Ge, and Al powder is 100- 150 μm, the particle size range of TiC particles is 15-30 μm, the purity is 99.9%, and the powder filling rate is 28%.

[0026] The concrete steps of the aluminum alloy welding wire preparation method of embodiment 1 are as follows:

[0027] S1: Using radio frequency plasma atomization equipment to pre-melt and mix TiC with a mass fraction of 10% and aluminum powder to obtain composite aluminum powder with dispersed ceramic particles, the electron microscope picture is as follows figure 1 shown;

[0028] S2: Add the composite aluminum po...

Embodiment 2

[0042] An aluminum alloy welding wire suitable for the additive manufacturing of arc fuses, consisting of an outer sheathed aluminum strip and an inner core powder. The aluminum strip is a 4047 aluminum strip. The powder includes the following components in mass percentage: Mg powder is 3.0%, Ge powder is 3.0%, ceramic particles are TiN and is 15%, and the balance is Al powder, wherein the particle size range of Mg, Ge, and Al powder is 100- 150μm, the particle size range of TiN particles is 15-30μm, the purity is 99.9%, and the powder filling rate is 30%.

[0043] The concrete steps of the aluminum alloy welding wire preparation method of embodiment 2 are as follows:

[0044] S1: Using radio frequency plasma atomization equipment to pre-melt and mix TiN with a mass fraction of 15% and aluminum powder to obtain composite aluminum powder with dispersed ceramic particles;

[0045] S2: Add the composite aluminum powder prepared in S1, Mg powder with a mass fraction of 3%, and Ge...

Embodiment 3

[0048] An aluminum alloy welding wire suitable for the additive manufacturing of arc fuses, consisting of an outer sheathed aluminum strip and an inner core powder. The aluminum strip is a 4047 aluminum strip. The powder includes the following components in mass percentage: Mg powder is 1.0%, Ge powder is 1.0%, ceramic particles are SiC and is 20%, and the balance is Al powder, wherein the particle size range of Mg, Ge, and Al powder is 100- 150μm, the particle size range of SiC particles is 15-30μm, the purity is 99.9%, and the powder filling rate is 30%.

[0049] The specific steps of the aluminum alloy welding wire preparation method of embodiment 3 are as follows:

[0050] S1: Using radio frequency plasma atomization equipment to pre-melt and mix SiC with a mass fraction of 20% and aluminum powder to obtain composite aluminum powder with dispersed ceramic particles;

[0051] S2: Add the composite aluminum powder prepared in S1, Mg powder with a mass fraction of 1%, and Ge...

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Abstract

The invention discloses an aluminum alloy welding wire suitable for arc fuse additive manufacturing. The aluminum alloy welding wire is composed of an outer aluminum strip and inner flux-cored powder,and the flux-cored powder comprises following components in percentage by mass: 1.0-3.0% of Mg powder, 1.0-5.0% of Ge powder, 5.0-20.0% of ceramic particles, and the balance of Al powder. The room-temperature strength and the high-temperature strength of an original Al-Si substrate are improved by adding germanium (Ge), the thermal fatigue resistance of an additive manufacturing structure under the effect of multi-layer and multi-pass welding is improved, the ceramic particles with good lattice matching degree with an aluminum substrate are added to serve as a heterogeneous nucleating agent,grains are refined, the additive manufacturing structure and the performance regulation and control are realized, the anisotropism of the additive manufacturing structure and performance is improved,the ceramic particles can be used as a strengthening phase along with the increase of the adding amount of the ceramic particles, and the mechanical property of an additive manufacturing part is further improved.

Description

Technical field: [0001] The invention relates to an aluminum alloy welding wire, in particular to an aluminum alloy welding wire suitable for arc fuse additive manufacturing and a preparation method thereof. Background technique: [0002] The application of metal powder bed additive manufacturing technology is becoming more and more widespread, but there are obvious limitations in the manufacture of large precision parts that are urgently needed in aerospace, transportation and other fields, especially for aluminum and magnesium light alloys with active chemical properties. Powder bed additive manufacturing also has certain safety hazards. The use of arc fuse additive manufacturing technology can better realize the safe and efficient additive manufacturing of large lightweight alloy structural parts. The premise of the application of this technology is the preparation of high-performance special wire. The key is the composition design, tissue regulation and controllable for...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/286B23K35/40
Inventor 易江龙牛犇潘琳琳陈俊孚易耀勇
Owner CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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