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Al-Cu-Si stranded welding wire and preparation method thereof

An al-cu-si, al-si technology, applied in the direction of welding equipment, welding medium, manufacturing tools, etc., to achieve high efficiency, controllable penetration depth, good contact effect

Active Publication Date: 2019-04-16
河北联之捷焊业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: aiming at the problems existing in the above-mentioned prior art, the present invention provides a kind of Al-Cu-Si stranded welding wire and its preparation method, which can solve the problem of the third-generation aluminum-lithium alloy in aerospace, etc. Welding instead of riveting in field application

Method used

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  • Al-Cu-Si stranded welding wire and preparation method thereof

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Effect test

Embodiment 1

[0032] Select one SAl 1100 central filament, two SAl 2319 and two SAl 4043 peripheral thick filaments, and four SAl2319 peripheral adjustment filaments for twisting, and two SAl 2319 and two SAl 4043 peripheral thick filaments should be arranged alternately. The parameters of the twisting process are: the equivalent diameter of the stranded welding wire with a lay length of 8 times, the tension of 12% of the rated tension of the equipment, and the number of revolutions of 350r / min. The chemical composition of the obtained welding wire is Cu: 3.6%, Si: 2.1%, Fe: 0.14%, Mn: 0.20%, Mg: 0.05%, Zn: 0.05%, Ti: 0.15%, Zr: 0.15%, V: 0.10%, and the rest is Al and a very small amount of unavoidable impurities.

Embodiment 2

[0034] Select one SAl 1100 central filament, two SAl 2319 and two SAl 4043 peripheral thick wires, two SAl2319 and two SAl 1100 peripheral adjustment wires for twisting, two SAl 2319 and two SAl 4043 peripheral thick wires should be In a staggered arrangement, two SAl 2319 and two SAl 1100 peripheral adjustment wires should also be staggered. The parameters of the twisting process are: the twist length is 10 times the equivalent diameter of the stranded welding wire, the tension is 12% of the equipment tension rating, the number of revolutions is 400r / min, and the chemical composition of the obtained welding wire is Cu: 3.0%, Si: 2.25%, Fe: 0.15%, Mn: 0.15%, Mg: 0.009%, Zn: 0.006%, Ti: 0.085%, Zr: 0.05%, V: 0.057%, and the rest is Al and a very small amount of unavoidable impurities.

Embodiment 3

[0036] Use one SAl 1100 central filament, two SAl 2319 and two SAl 4043 peripheral thick wires, two SAl2319, one SAl 1100 and one SAl 4043 peripheral adjustment wire for twisting, two SAl 2319 and two SAl4043 The peripheral thick wires are staggered, and the two SAl 2319 peripheral adjustment wires should also be staggered. Twisting process parameters: the twist length is 11.6 times the equivalent diameter of the stranded welding wire, the tension is 13% of the equipment tension rating, the number of revolutions is 500r / min, and the chemical composition of the obtained welding wire is Cu: 3.22%, Si: 2.5%, Fe : 0.156%, Mn: 0.10%, Mg: 0.007%, Zn: 0.009%, Ti: 0.05%, Zr: 0.104%, V: 0.01%, the rest is Al and a very small amount of unavoidable impurities.

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Abstract

The invention relates to an Al-Cu-Si stranded welding wire and a preparation method thereof, and belongs to the technical field of welding. The stranded welding wire is formed by twisting a center fine wire, four peripheral thick wires and four peripheral adjusting wires; and the stranded welding wire comprises the following components: 3.0-3.6% of Cu, 2.1-2.5% of Si, Fe not more than 0.20%, 0.10-0.20% of Mn, Mg not more than 0.05%, Zn not more than 0.05%, 0.05-0.15% of Ti, 0.05-0.15% of Zr, 0.01-0.10% of V, and the balance of Al. Microalloy elements of Ti and Zr in the welding wire achieve agrain refining effect; Mn and V can inhibit recrystallization; Si can effectively improve the fluidity of clad metal and the corrosion resistance of welding lines; during welding, the strength of joints is high, and is higher by 50-80 MPa compared with conventional MIG welding conditions; and no welding hot crack is generated.

Description

technical field [0001] The invention relates to an Al-Cu-Si stranded welding wire and a preparation method thereof, belonging to the technical field of welding. Background technique [0002] For every 1% lithium element added in aluminum-lithium alloy, the density can be reduced by 3%, and the elastic modulus can be increased by 6%, which has the advantages of light weight, high modulus and high strength. With the deepening of research and development and the expansion of industrialization, the third-generation aluminum-lithium alloys (such as 2195, 2196, 2197, 2198, 2099, 2050, etc.) have both light weight, high specific strength and specific stiffness, low crack growth rate, excellent Excellent low temperature performance, excellent weldability, fatigue resistance, corrosion resistance and damage resistance. Compared with conventional aluminum alloys, the weight of components can be reduced by 10% to 15%, and the rigidity can be increased by 15% to 20%. Therefore, it has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/288B23K35/40
Inventor 梁裕刘平礼冯昱
Owner 河北联之捷焊业科技有限公司
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