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Welding wire matched with AI-Mg-Si series aluminum alloy during use and preparation process of welding wire

A preparation process, aluminum alloy technology, applied in the field of welding material manufacturing, to achieve the effect of improving plastic processing performance, increasing tensile strength and yield strength, and scientific and reasonable step design

Inactive Publication Date: 2017-01-04
LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are still few studies on the welding wire used for this aluminum alloy and its welding performance. The scope of application and the optimization of the manufacturing process of domestic aluminum alloy welding wire have important theoretical and practical significance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0025] A welding wire for Al-Mg-Si series aluminum alloys, the weight percentage of each component in the welding wire is: Mg: 1.2%, Si: 0.9%, Cu: 0.3%, Fe: 0.4%, Cr: 0.1%, Ce: 0.15-0.2%, Er: 0.15%, the rest is Al;

[0026] The above Al-Mg-Si series aluminum alloy matching welding wire is prepared according to the following steps:

[0027] (a) Melting and casting

[0028] Before smelting and casting, heat the smelting and casting tools at 400-500°C for 1 hour and dry them. It is smelted in a medium frequency induction resistance furnace with a melting temperature of 690°C. During the smelting process, the melt is stirred to make the internal temperature and composition of the melt uniform, and hexachloroethane is added to the alloy liquid for degassing and refining. Before casting, wrap the magnesium with aluminum foil and add it to the molten aluminum to prevent it from contacting with air, which will generate impurities and cause metal loss. Stand still for 10 minutes, an...

specific Embodiment 2

[0040] A welding wire for Al-Mg-Si series aluminum alloys, the weight percentage of each component in the welding wire is: Mg: 1.37%, Si: 0.8%, Cu: 0.2%, Fe: 0.5%, Cr: 0.1%, Ce: 0.15%, Er: 0.1%, the rest is Al;

[0041] Prepared according to the method described in Example 1, the difference is that the melting temperature is 720°C, the annealing temperature in step (b) is 480°C, the holding time is 18h, the flow rate of argon gas is 8ml / s, and in step (c) , the hot extrusion temperature is 450°C, and the extrusion ratio is 15. The diameter of the welding wire is 1.5mm. Remaining steps are identical with embodiment 1.

specific Embodiment 3

[0043] A welding wire for Al-Mg-Si series aluminum alloys, the weight percentage of each component in the welding wire is: Mg: 1.5%, Si: 1.0%, Cu: 0.3%, Fe: 0.5%, Cr: 0.15%, Ce: 0.2%, Er: 0.2%, the rest is Al;

[0044] Prepared according to the method described in Example 1, wherein the melting temperature is 750°C, the argon flow rate is 10ml / s, the annealing temperature in step (b) is 500°C, and the holding time is 8h. In step (c), hot extrusion The temperature was 500°C and the extrusion ratio was 75. The diameter of the welding wire is 2.5mm. Remaining steps are identical with embodiment 1.

[0045] Select a certain alloy as the base material, use any welding wire prepared in the above-mentioned examples 1-3 as the filler material, use the manual TIG method for welding, and analyze the welded joints, and finally draw the following conclusions:

[0046] First, the welding wire of the present invention is mainly aimed at deformed aluminum alloys, and the chemical composit...

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Abstract

The invention discloses a welding wire matched with AI-Mg-Si series aluminum alloy during use. The welding wire is prepared from the following main chemical components in percentage by weight: 1.2-1.5 percent of Mg, 0.8-1.0 percent of Si, 0.2-0.3 percent of Cu, 0.4-0.5 percent of Fe, 0.1-0.15 percent of Cr, 0.15-0.2 percent of Ce, 0.1-0.2 percent of Er and the balance of Al. A preparation process of the welding wire comprises the following steps: mixing the raw materials in proportion, smelting by adopting a medium-frequency induction resistance furnace and casting under the protection of argon gas into a cast ingot; beheading and milling the homogenized cast ingot and then extruding to prepare an alloy wire rod; performing coarse, medium and fine wire drawing on the alloy wire rod and then performing scraping and cleaning treatment to obtain the welding wire. The welding wire prepared by the preparation process disclosed by the invention has the following advantages that a smelting process is stable and easy to realize, the drawing performance of the welding wire is good, and a drawing device is subjected to sealing treatment to prevent the surface oxidation of the welding wire; as rare earth elements are added, the welding wire structure is refined; impurities in the welding wire are less and low in content, so that the toughness of the welding wire is promoted to be improved; scraping and ultrasonic cleaning are adopted for surface treatment, so that the simplicity and no pollution are realized; the welding wire is low in burn rate, difficult to break and good in mechanical property.

Description

technical field [0001] The invention relates to the technical field of welding material manufacturing, in particular to a welding wire for Al-Mg-Si series aluminum alloys and a preparation process thereof. Background technique [0002] Aluminum and its alloys are widely used in various welding structures and products because of their advantages such as low density, light weight, non-magnetic properties, high specific strength, good electrical and thermal conductivity, good formability and atmospheric corrosion resistance. Among them, such as aviation, navigation, automobile manufacturing, petrochemical, telecommunications and other industries. [0003] The wide application of aluminum and aluminum alloys and the rapid progress of aluminum alloy welding technology make aluminum and aluminum alloy welding wires increasingly attract people's attention. At present, the aluminum alloy welding wire produced in our country has serious quality instability problems, and the aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/286B23K35/40
Inventor 傅开武杨小娟朱丽玲施正国李小慧
Owner LANZHOU WEITE WELDING MATERIAL FURANCE BURDEN
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