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Multi-element compounded micro-alloyed Al-Mg-Sc series welding wire and preparation method thereof

A micro-alloying and multi-composite technology, applied in welding equipment, metal processing equipment, welding medium, etc., to achieve the effects of excellent corrosion resistance, strong corrosion resistance, and high joint strength

Inactive Publication Date: 2011-06-01
ZHEJIANG YINYU WELDING NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of the properties of Al-Mg and Al-Zn-Mg medium and high-strength aluminum alloys and the improvement of the reliability requirements for connecting parts, traditional Al-Mg alloy welding wires such as ER5356 can no longer meet the requirements of medium and high-strength aluminum alloy welding joints. Requirements for strength, plasticity, corrosion performance, etc., especially for thick plate welding and large parts that cannot be heat treated after welding, there is an urgent need for high-strength aluminum alloy welding wire with better thermal cracking and stress corrosion resistance to meet more Engineering components require increasing connection strength and reliability

Method used

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  • Multi-element compounded micro-alloyed Al-Mg-Sc series welding wire and preparation method thereof
  • Multi-element compounded micro-alloyed Al-Mg-Sc series welding wire and preparation method thereof
  • Multi-element compounded micro-alloyed Al-Mg-Sc series welding wire and preparation method thereof

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preparation example Construction

[0027] In the preparation method of the present invention, the processes not specifically described in this specification all adopt conventional processes.

[0028] When welding, according to the selected fusion welding method and its welding specification parameters, manual welding or automatic welding can be used to send the welding wire into the welding pool for welding.

Embodiment 1

[0030] Its main chemical composition (mass percentage) is: magnesium (Mg) 4.5%, manganese (Mn) 0.30%, zirconium (Zr) 0.10%, scandium (Sc) 0.18%, cerium (Ce) + lanthanum (La) 0.25%, The rest is Al and unavoidable impurities. Among them, cerium (Ce) is 60% to 80%, and lanthanum (La) is 40% to 20%.

[0031] (1) Preparation of raw materials: Aluminum (Al) and magnesium (Mg) are added in the form of pure metals, and alloying elements manganese (Mn), scandium (Sc), zirconium (Zr), lanthanum (La) and cerium (Ce) are all added in the form of Al Added in the form of base master alloy, prepared according to mass percentage;

[0032] (2) Alloy smelting: heating and smelting in a resistance furnace, in the covering agent CaF 2 +MgCl 2 +CaCl 2 Melting and furnace body purification are carried out under the protection of the furnace, and cast into Alloy ingot, wherein the melting temperature is 760°C, the pouring temperature is 730°C, and the content of hydrogen in the alloy is controll...

Embodiment 2

[0036] Its main chemical composition (mass percentage) is: magnesium (Mg) 5.0%, manganese (Mn) 0.40%, zirconium (Zr) 0.15%, scandium (Sc) 0.25%, cerium (Ce) + lanthanum (La) 0.28%, The rest is Al and unavoidable impurities. Among them, cerium (Ce) is 60% to 80%, and lanthanum (La) is 40% to 20%.

[0037] (1) Preparation of raw materials: Aluminum (Al) and magnesium (Mg) are added in the form of pure metals, and alloying elements manganese (Mn), scandium (Sc), zirconium (Zr), lanthanum (La) and cerium (Ce) are all added in the form of Al Added in the form of base master alloy, prepared according to mass percentage;

[0038] (2) Alloy smelting: heating and smelting in a resistance furnace, in the covering agent CaF 2 +MgCl 2 +CaCl 2 Melting and furnace body purification are carried out under the protection of the furnace, and cast into Alloy ingots, where the melting temperature is set at 780°C, the pouring temperature is 720°C, and the content of hydrogen in the alloy is ...

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Abstract

The invention discloses a multi-element compounded micro-alloyed Al-Mg-Sc series welding wire. The welding wire comprises the following components in percentage by mass: 4.5 to 7.5 percent of magnesium, 0.3 to 0.63 percent of manganese, 0.1 to 0.2 percent of zirconium, 0.18 to 0.4 percent of scandium, 0.25 to 0.4 percent of cerium and lanthanum and the balance of Al. When the Sc and Zr multi-element compounded micro-alloyed Al-Mg-Sc series welding wire is used for the fusion welding of an Al-Zn-Mg (Sc) series alloy and an Al-Mg (Sc) series alloy, the welding seam alloy has fine and uniform textures and the hot cracking tendency of a welded joint is obviously reduced. The alloy welding wire has relatively high fluidity at a welding temperature, can obtain more excellent welding seam textures, reduces the welding hot cracking tendency of the welding seam alloy, obtains relatively high strength of the joint after welding and has relatively strong corrosion resistance.

Description

technical field [0001] The invention relates to a multi-element composite microalloyed Al-Mg-Sc series welding wire for fusion welding of Al-Mg(Sc) series and Al-Zn-Mg(Sc) series aluminum alloys and a preparation method thereof. Background technique [0002] At present, in the field of aluminum alloy fusion welding, non-heat treatment strengthened aluminum-magnesium alloy welding wire is the most widely used one, accounting for more than 50% of the entire aluminum alloy filler material usage, and its typical grades are ER5356 and ER5183. The advantages of ER5356 alloy welding wire are moderate strength, relatively good thermal cracking resistance and corrosion resistance. However, with the continuous improvement of the properties of Al-Mg and Al-Zn-Mg medium and high-strength aluminum alloys and the improvement of the reliability requirements for connecting parts, traditional Al-Mg alloy welding wires such as ER5356 can no longer meet the requirements of medium and high-stre...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40
Inventor 陈继强石凯谢幸儿胡曼弘
Owner ZHEJIANG YINYU WELDING NEW MATERIAL TECH
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