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A kind of welding wire for al-cu-si-mg alloy welding and preparation method thereof

An al-cu-si-mg, alloy technology, applied in welding equipment, welding medium, metal processing equipment, etc., can solve the problems of difficult control of welding wire gas slag content, easy welding cracks, easy segregation, etc., and achieve good melting and casting Good wire-making performance and resistance to welding cracks

Active Publication Date: 2021-04-13
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Abstract
  • Description
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  • 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 the B content is relatively high (0.001%-0.05%), which is only suitable for the production of small and medium-sized furnaces, not suitable for large-scale industrial production. 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: batching, target 3150Kg ingot, batching includes 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, the ...

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Abstract

The invention relates to a welding wire used for Al-Cu-Si-Mg alloy welding and a preparation method thereof, belonging to the technical field of metal connection. The welding wire of the present invention has good melting and casting performance, is suitable for large-scale industrial production, is used for fusion welding of 2A14 alloy, and has good resistance to welding cracks. Quite completely solved the problems of BJ‑380A and BJ‑380 welding wire.

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 the B content is relatively high (0.001%-0.05%), which is only suitable for the production of small and medium-sized furnaces, not suitable for large-scale industrial production. Inclusion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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