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Al-Mg-Sc series solder wire

A technology of al-mg-sc and welding wire, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of lack of matchability of base metal properties, unengineerable welding, low joint strength, etc. Achieve the effects of good comprehensive mechanical properties of joints, high-frequency fatigue limit improvement, and good crack resistance of welded joints

Active Publication Date: 2008-12-24
BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the addition of alloying element Li to the 5A90 alloy for strengthening, the alloy strength is higher (wherein σ b ≥410MPa, δ 5 ≥8%)
The Li element is very volatile during the welding heating process, so the weld basically does not contain the alloy element Li, so the alloy itself is cut into strips as the filler material or LF6 welding wire is used for welding, the joint strength is very low, and the properties of the base metal are lacking. Compatible, and not engineered for soldering

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Its main chemical composition (wt%) is: magnesium (Mg) 5, manganese (Mn) 0.7, zirconium (Zr) 0.1, scandium (Sc) 0.75, titanium (Ti) 0.1, sodium (Na) + potassium (K) ≤ 15ppm, hydrogen (H) ≤ 0.4ppm, aluminum (Al) balance.

[0026] preparation:

[0027] (1) Preparation of raw materials The matrix element aluminum (Al) is added in the form of pure aluminum (Al), and the alloying elements magnesium (Mg), manganese (Mn), scandium (Sc), zirconium (Zr), and titanium (Ti) are all added in the form of aluminum (Al ) is added in the form of a master alloy, prepared by weight percentage;

[0028](2) Alloy smelting Using an induction heating electric furnace, the alloy is smelted under the condition of vacuum argon protection, and cast into a φ100mm alloy ingot;

[0029] (3) Processing and forming: After peeling and cutting the alloy ingot, it is annealed at 450 ° C, single extruded, and then annealed and drawn into φ1.6mm continuous disc-shaped welding wire and φ2.0mm×1000mm stra...

Embodiment 2

[0032] Its main chemical composition (wt%) is: magnesium (Mg) 6, manganese (Mn) 0.7, zirconium (Zr) 0.05, scandium (Sc) 0.5, titanium (Ti) 0.05, sodium (Na) + potassium (K) ≤ 15ppm, hydrogen (H) ≤ 0.4ppm, aluminum (Al) balance.

[0033] preparation:

[0034] (1) Preparation of raw materials The matrix element aluminum (Al) is added in the form of pure aluminum (Al), and the alloying elements magnesium (Mg), manganese (Mn), scandium (Sc), zirconium (Zr), and titanium (Ti) are all added in the form of aluminum (Al ) is added in the form of a master alloy, prepared by weight percentage;

[0035] (2) Alloy smelting Using an induction heating electric furnace, the alloy is smelted under the condition of vacuum argon protection, and cast into a φ100mm alloy ingot;

[0036] (3) Processing and forming: After peeling and cutting the alloy ingot, it is annealed at 450 ° C, single extruded, and then annealed and drawn into φ1.6mm continuous disc-shaped welding wire and φ2.0mm×1000mm st...

Embodiment 3

[0039] Its main chemical composition (wt%) is: magnesium (Mg) 7, manganese (Mn) 0.6, zirconium (Zr) 0.25, scandium (Sc) 0.4, titanium (Ti) 0, sodium (Na) + potassium (K) ≤ 15ppm, hydrogen (H) ≤ 0.4ppm, aluminum (Al) balance.

[0040] preparation:

[0041] (1) Preparation of raw materials The matrix element aluminum (Al) is added in the form of pure aluminum (Al), and the alloying elements magnesium (Mg), manganese (Mn), scandium (Sc), zirconium (Zr), and titanium (Ti) are all added in the form of aluminum (Al ) is added in the form of a master alloy, prepared by weight percentage;

[0042] (2) Alloy smelting Using an induction heating electric furnace, the alloy is smelted under the condition of vacuum argon protection, and cast into a φ100mm alloy ingot;

[0043] (3) Processing and forming: After peeling and cutting the alloy ingot, it is annealed at 450 ° C, single extruded, and then annealed and drawn into φ1.6mm continuous disc-shaped welding wire and φ2.0mm×1000mm strai...

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PUM

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Abstract

An Al-Mg-Sc welding wire for Al-Li alloy (Al-Mg-Li) and Al-alloy (Al-Mg) contains Mg (4-8 Wt%), Mn (0.5-1.0), Zr (0.05-0.3), Sc (0.1-1.0), Ti (0.05-0.15), Na+K (0-15 ppm), H (0-0.4 ppm) and Al (rest). It has high anti-cracking performance and high mechanical performance.

Description

technical field [0001] The invention relates to an Al-Mg-Sc series welding wire used for fusion welding of Al-Mg-Li series aluminum-lithium alloys and Al-Mg series aluminum alloys. Background technique [0002] High-strength aluminum-lithium alloys and aluminum alloys are widely used in the aviation industry due to their low density and high specific strength. However, its application range is often limited by factors such as poor weldability, joint softening, low fatigue life, and poor corrosion resistance. If this series of problems can be solved, the application of aluminum-lithium alloys in aviation and aerospace will be greatly promoted, a significant weight reduction effect will be achieved, and obvious economic benefits will be obtained. [0003] At present, adding rare earth elements to aluminum alloys and aluminum-lithium alloys to improve the strength of the alloys and obtain better comprehensive properties is a research direction of aluminum alloys. Russia has d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K35/40
Inventor 李艳张学军李小飞张文扬
Owner BEIJING AVIATION MATERIAL INST NO 1 GRP CORP CHINA AVIATION IND
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