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Welding wire for aluminum copper alloy and preparation method and application thereof

A technology of aluminum-copper alloy and welding wire, applied in welding equipment, metal processing equipment, welding medium, etc., can solve the problems of stress concentration sensitivity, poor plasticity, and restrictions on the application of aluminum-copper alloy

Inactive Publication Date: 2019-01-04
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common connection methods for aluminum-copper alloys are fusion welding. During fusion welding, the weld metal is mainly composed of low-melting eutectic structures distributed along grain boundaries and between dendrites. The weld metal is prone to crystallization cracks and has poor plasticity. Concentrated and sensitive, the strength of the joint can only reach about 50-60% of the strength of the base metal, which restricts the application of aluminum-copper alloys
For example, the welding wires developed for welding high-strength aluminum-copper alloys include ER2319 commercial welding wires produced abroad and SAlCu welding wires prepared in accordance with GB / T10858-1989 standards. Eutectic composition, the strength of the weld metal is low, when welding 2219 or 2519 high-strength aluminum-copper alloy, the strength of the welded joint can only reach 55-60% of the base metal

Method used

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  • Welding wire for aluminum copper alloy and preparation method and application thereof
  • Welding wire for aluminum copper alloy and preparation method and application thereof
  • Welding wire for aluminum copper alloy and preparation method and application thereof

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preparation example Construction

[0031] The present invention provides a method for preparing a welding wire for an aluminum-copper alloy described in the above technical solution, comprising the following steps:

[0032] (1) Corresponding to the chemical composition of the welding wire described in the above technical solution, mixing the raw materials for smelting and casting to obtain an ingot;

[0033] (2) Homogenizing and hot-extruding the ingot of the step (1) successively to obtain an extruded material;

[0034] (3) Drawing the extruded material in the step (2) to obtain a welding wire for aluminum-copper alloy.

[0035] The present invention corresponds to the chemical composition of the welding wire described in the above technical solution, and mixes the raw materials for smelting and refining to obtain a casting solution. In the present invention, the raw materials preferably include aluminum-copper master alloys, aluminum-manganese master alloys, aluminum-zirconium master alloys, aluminum-titaniu...

Embodiment 1

[0065] Raw materials were prepared according to the amounts of the components shown in Table 1, in terms of mass percent, and the balance was Al, which was not listed in the table. Among them, the raw materials of each component are Al-50Cu master alloy, Al-10Mn master alloy, Al-10Zr master alloy, Al-10Ti master alloy, Al-10RE master alloy and aluminum with a purity of 99.99%.

[0066] After mixing the raw materials, use a graphite crucible to melt in a well-type electric furnace. The melting temperature is 750°C, and the temperature is kept for 35 minutes; ZS-AJ01C, which accounts for 0.15% of the raw material mass, is added for refining. The refining temperature is 770°C, and the time is 15 minutes. After refining, add Hexachloroethane accounting for 0.15% of the total mass of the refining solution is used for deslagging and dehydrogenation; the refining solution after deslagging and dehydrogenation is poured into a preheated iron mold at 720°C to form an ingot, and the prehe...

Embodiment 2～4

[0070] The preparation method and welding method are the same as in Example 1, the difference lies in the amount of each component and the process parameters, see Tables 1 and 2 for details.

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Abstract

The invention belongs to the technical field of aluminum alloy welding materials, and in particular, relates to a welding wire for an aluminum copper alloy and a preparation method and application thereof. Mixed rare earth elements are matched with Ti and Zr for use; the mixed rare earth elements, Ti and Zr can be reacted with Al to correspondingly generate high-melting-point particles; and the mixed rare earth elements can inhibit roughening, agglomeration and precipitation of the high-melting-point particles, so that the high-melting-point particles can serve as cores of basal body nucleation to accelerate formation of isometric crystals, to refine the welding line structures and to improve the strength and the plasticity of welding line joints. When the welding wire for the aluminum copper alloy is used for welding the aluminum copper alloy, the strength of the welding line joints reaches above 308 MPa, and the strength coefficient reaches 66.0-70.4%.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy welding materials, and in particular relates to a welding wire for aluminum-copper alloy and its preparation method and application. Background technique [0002] The development of aluminum-copper alloys is inseparable from the development of aviation. At the beginning of the 20th century, when the Wright brothers manufactured aircraft, they used Al-Cu-Mn to cast the crankcase of aircraft engines; subsequently, Al-Cu-Mg alloys The age hardening phenomenon was discovered in the paper, which made it possible for the aluminum-copper alloy to be used as the main structural material of the aircraft. At present, aluminum-copper alloy has become one of the main structural materials of aircraft body, such as aircraft fuselage, skin, atmospheric chassis, bulkhead, wing rib, spar, engine compressor wheel, fan, impeller, piston, wind guide Wheels and roulette, etc., are made of aluminum-copper alloy...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K35/12B23K35/40
CPCB23K35/0261B23K35/286B23K35/40
Inventor 杨成刚程裕杰钱文蔡佳琨任泽良管仲达
Owner NANCHANG HANGKONG UNIVERSITY
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