A kind of welding wire for aluminum-copper alloy and its preparation method and application

An aluminum-copper alloy and welding wire technology, which is applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of easy crystallization cracks in the weld metal, low weld metal strength, poor plasticity, etc.

Inactive Publication Date: 2021-05-11
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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  • A kind of welding wire for aluminum-copper alloy and its preparation method and application
  • A kind of welding wire for aluminum-copper alloy and its preparation method and application
  • A kind of welding wire for aluminum-copper alloy and its preparation method and application

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preparation example Construction

[0031]The present invention provides the preparation method of the aluminum copper alloy wire of the above technical solution, including the following steps:

[0032](1) The chemical composition of the welding wire according to the above-described technical solution is made, and the raw material is mixed and cast, and the ingot is obtained.

[0033](2) The ingot of the step (1) is sequentially handled and heat extrudent, resulting in an extruded material;

[0034](3) Pull the extruded material of the step (2) to obtain a steel wire for aluminum copper alloy.

[0035]The present invention corresponds to the chemical composition of the wire of the above-described technical solution, and the raw material is mixed and refined to obtain a casting liquid. In the present invention, the raw material preferably includes an aluminum copper intermediate alloy, an aluminum manganese intermediate alloy, an aluminum-based intermediate alloy, an aluminum-rare earth alloy, preferably comprising an Al-50Cu allo...

Embodiment 1

[0065]According to the amount of the components shown in Table 1, the material is prepared, according to the mass percentage, the margin is Al, and is not listed in the table. Among them, each component raw material is an Al-50Cu intermediate alloy, an Al-10 mN intermediate alloy, Al-10Ti intermediate alloy, Al-10RE intermediate alloy, and an aluminum having a purity of 99.99%.

[0066]After mixing the raw material, the smelting in the well furnace with graphite crucibles, the melting temperature is 750 ° C, heat insulation 35min; adding ZS-AJ01C, which is 0.15% of the material, is refined, the refining temperature is 770 ° C, the time is 15 min, and the time is refined after refining Total hexachloroethane in the total mass of the refined liquid is subjected to slagm dehydrogenation; the refined liquid after the slag dehydrogenation is poured into the preheated iron mold to form a ingot, and the preheating temperature of the iron mold is 200. ° C. After the homogenization of the ingot...

Embodiment 2～4

[0070]The preparation method and the welding method are the same as in Example 1, and the different amounts and process parameters of each group are in particular, and in particular, Table 1 and 2.

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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 aluminum-copper alloy and its preparation method and application. In the present invention, mixed rare earth elements are used together with Ti and Zr, and mixed rare earth elements, Ti and Zr can react with Al to generate high melting point particles accordingly, and mixed rare earth elements can inhibit the coarsening, aggregation and precipitation of high melting point particles, making high melting point particles The melting point particles can act as the nucleation core of the matrix, promote the formation of equiaxed grains, refine the weld microstructure, and improve the strength and plasticity of the weld joint. The results of the examples show that when the aluminum-copper alloy welding wire described in the above scheme is used to weld the aluminum-copper alloy, the strength of the weld joint can reach more than 308 MPa, and the strength coefficient can reach 66.0-70.4%.

Description

Technical field[0001]The present invention belongs to the technical field of aluminum alloy welding material, and more particularly to a steel wire for aluminum copper alloy and a preparation method thereof.Background technique[0002]The development of aluminum copper alloy and the development of the aviation cause are inseparable. At the beginning of the 20th century, the Wright Brothers used the crank case of Al-Cu-Mn cast aircraft engine; subsequently, Al-Cu-Mg alloy The time-effect hardening phenomenon is found to make the aluminum copper alloy as aircraft body structural material. At present, the aluminum copper alloy has become one of the main structural materials of the aircraft, such as the fuselage, skin, atmosphere, septum, wing rib, spar, engine compressor wheel, fan, impeller, piston, airline Wheels and roulettes, etc., alloys are used. With the gradual expansion of aluminum copper alloy applications, the performance of aluminum copper alloys faces increasing strict requi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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