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Welding wire for Al-Cu-Si-Mg alloy welding, and preparation method thereof

An al-cu-si-mg, welding wire technology, applied in welding equipment, welding medium, metal processing equipment, etc., can solve the problems of difficult control of welding wire gas slag content, prone to welding cracks, and unsuitable for large-scale industrial production. , to achieve the effect of good casting wire-making performance and good resistance to welding cracks

Active Publication Date: 2018-11-13
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The aluminum alloy with the grade 2A14 is an Al-Cu-Si-Mg alloy, which is the main structural material of the aerospace storage tank. There are two kinds of welding wires currently used: BJ-380 and BJ-380A, and the BJ-380 welding wire is used for welding low-temperature storage tanks. , due to the high content of Ti and Zr, which exceeds the solid solubility in aluminum, it is easy to segregate, the qualified rate of welding wire is low, and welding cracks are prone to appear during welding; BJ-380A is a welding wire used for welding storage tanks at room temperature. Y element, and high B content (0.001%-0.05%), is only suitable for small and medium-sized furnace production, not suitable for large-scale industrial production. When using small and medium-sized furnaces for production, the content of welding wire gas slag is difficult to control, resulting in welds prone to porosity, Inclusion defects seriously affect welding production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The invention is a welding wire suitable for Al-Cu-Si-Mg alloy welding, the Al-Cu-Si-Mg alloy is 2A14 aluminum alloy, and the composition of the welding wire consists of Si, Cu, Ti, Zr, V, Cr, Be and Al composition; The mass content of each component is:

[0025] The content of Si is 3.0%-4.0%, the content of Cu is 1.5%-2.5%, the amount of Ti is 0.1%-0.2%, the content of Zr is 0.1%-0.25%, the content of V is 0.05-0.15%, Cr The content of Be is 0.001-0.05%, the content of Be is 0.0001-0.0008%, and the rest is Al.

[0026] The preparation method of the welding wire suitable for Al-Cu-Si-Mg alloy welding, the steps are:

[0027] Step 1: Ingredients, target 150Kg ingot, ingredients include 110Kg high-purity aluminum, 3.3Kg pure copper plate, 2.1Kg Al-15Zr master alloy, 27Kg Al-20Si master alloy, 1.1Kg Al-3Cr master alloy , 1.7Kg of Al-15Ti master alloy, 5.6KG of Al-3V master alloy, 30g of Al-3Be master alloy, all master alloys are added with the furnace.

[0028] Step 2:...

Embodiment 2

[0037] The invention is a welding wire suitable for Al-Cu-Si-Mg alloy welding, the Al-Cu-Si-Mg alloy is 2A14 aluminum alloy, and the composition of the welding wire consists of Si, Cu, Ti, Zr, V, Cr, Be and Al composition; The mass content of each component is:

[0038] The content of Si is 3.0%-4.0%, the content of Cu is 1.5%-2.5%, the amount of Ti is 0.1%-0.2%, the content of Zr is 0.1%-0.25%, the content of V is 0.05-0.15%, Cr The content of Be is 0.001-0.05%, the content of Be is 0.0001-0.0008%, and the rest is Al.

[0039] The preparation method of the welding wire suitable for Al-Cu-Si-Mg alloy welding, the steps are:

[0040] Step 1: Ingredients, target 3150Kg ingot, ingredients include 2350Kg high-purity aluminum, 66Kg pure copper plate, 42Kg Al-15Zr master alloy, 540Kg Al-20Si master alloy, 22Kg Al-3Cr master alloy, 34Kg Al- 15Ti master alloy, 112KG Al-3V master alloy, 800g Al-3Be master alloy, all master alloys are added with the furnace.

[0041] Step 2: Melting,...

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Abstract

The invention relates to a welding wire for Al-Cu-Si-Mg alloy welding, and a preparation method thereof, and belongs to the technical field of metal connection. The welding wire provided by the invention has excellent casting wire performance, and is applicable for large-scale industrial production, and used for fusion welding of 2Al4 alloy; the welding crack resistance is high, and the normal temperature performance of a welding head is superior to the normal temperature performance of BJ-380A; the low-temperature performance is equivalent to the low-temperature performance of BJ-380, and theproblems of BJ-380A and BJ-380 welding wires are solved completely.

Description

technical field [0001] The invention relates to a welding wire for Al-Cu-Si-Mg alloy welding and a preparation method thereof, belonging to the technical field of metal connection. Background technique [0002] The aluminum alloy with the grade 2A14 is an Al-Cu-Si-Mg alloy, which is the main structural material of the aerospace storage tank. There are two kinds of welding wires currently used: BJ-380 and BJ-380A, and the BJ-380 welding wire is used for welding low-temperature storage tanks. , due to the high content of Ti and Zr, which exceeds the solid solubility in aluminum, it is easy to segregate, the qualified rate of welding wire is low, and welding cracks are prone to appear during welding; BJ-380A is a welding wire used for welding storage tanks at room temperature. Y element, and high B content (0.001%-0.05%), is only suitable for small and medium-sized furnace production, not suitable for large-scale industrial production. When using small and medium-sized furnaces...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/286B23K35/40
Inventor 焦好军王明正周炼刚程昊李玉龙
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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