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Ultra-fine grain aluminum alloy gold welding wire and preparation method thereof

A kind of aluminum alloy welding wire, ultra-fine grain technology, applied in welding equipment, metal processing equipment, welding medium and other directions, to achieve the effect of refining grain, reducing low strength and improving welding performance

Inactive Publication Date: 2015-06-24
CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The first technical problem to be solved by the present invention is to provide an ultra-fine-grained aluminum alloy welding wire for the prior art, which can effectively reduce aluminum alloy welding defects, especially the joint strength existing in the high-strength aluminum alloy welding process Low welding defects such as welding cracks can improve the overall performance of aluminum alloys such as welding strength and corrosion resistance

Method used

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  • Ultra-fine grain aluminum alloy gold welding wire and preparation method thereof
  • Ultra-fine grain aluminum alloy gold welding wire and preparation method thereof
  • Ultra-fine grain aluminum alloy gold welding wire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The composition of the ultra-fine grain aluminum alloy welding wire in this example is: 0.05% Sc, 0.05% Er, 0.6% mixed rare earth, 0.15% B, 0.2% Ti, 0.15% Cr, 0.15% Zr, 0.25% Mn, 0.3% Zn , 5.8% Mg, the rest is Al, as a component of rare earth composite microalloy welding wire, which is characterized by mixed rare earth, and the aluminum alloy welding wire is designed by using the characteristics of mixed rare earth.

[0030]The preparation process is as follows: firstly, according to the mass percentages of the above-mentioned components, combined with the total amount of aluminum alloy to be prepared, calculate the amount of each single-component element required, prepare the alloy ingredient list, and prepare materials according to the ingredient list. Add an appropriate amount of aluminum ingot or molten aluminum into the semi-closed reverberatory furnace according to the ingredient list, and heat to melt at 780°C. According to the ingredient list, add appropriate am...

Embodiment 2

[0032] In this example, the composition of the ultra-fine grained aluminum alloy welding wire is: 0.2%Sc, 0.1%Er, 0.01% mixed rare earth, 0.1%B, 0.1%Ti, 0.15%Cr, 0.2%Zr, 0.25%Mn, 0.2%Zn , 5% Mg, and the rest is Al, as a component of rare earth composite microalloy welding wire, which is characterized by mixed rare earths, and the aluminum alloy welding wire is designed by using the characteristics of mixed rare earths.

[0033] The preparation process is as follows: firstly, according to the mass percentages of the above-mentioned components, combined with the total amount of aluminum alloy to be prepared, calculate the amount of each single-component element required, prepare the alloy ingredient list, and prepare materials according to the ingredient list. Add an appropriate amount of aluminum ingots or molten aluminum into a semi-closed reverberatory furnace according to the ingredient list, and heat and melt at 760°C. According to the ingredient list, add appropriate amoun...

Embodiment 3

[0035] The base material for welding is a 7A52 aluminum alloy plate that has undergone solution-aging treatment. The size of the test plate is 15mm×200mm×300mm. The groove of the test plate is a 45°V-shaped groove. The prepared welding wire is welded thereto respectively. The welding process is shown in Table 1.

[0036] Table 1 welding process parameters

[0037]

[0038] According to the national standard, the welded joints are processed into tensile specimens, and the tensile mechanical properties are tested with an electronic tensile machine to determine the strength coefficient of the welded joints. The mechanical properties of the welded joints after welding are shown in Table 2. It can be seen from Table 2 that under the same conditions, the welding wire prepared in Example 1 has improved performance of the welded joint of 7A52 high-strength aluminum alloy compared with the commonly used 5356 welding wire, in which the tensile strength is increased by 6.8%, and the...

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Abstract

The invention relates to an ultra-fine grain aluminum alloy gold welding wire and a preparation method of the ultra-fine grain aluminum alloy gold welding wire. The ultra-fine grain aluminum alloy gold welding wire includes the following components: SC 0.05%-0.8%, Er 0.05%-0.6%, misch metal 0.01%-0.8%, B 0.01%-0.5%, Ti 0.1%-0.3%, Cr 0.05%-0.4%, Zr 0.05%-0.2%, Mn 0.1%-0.6%, Zn 0.2%-1.0%, Mg 4%-8%, and the rest is Al. The preparation method is as follows: adding an aluminum ingot or the molten aluminum into a semi-closed reverberatory furnace firstly; adding Mn, Ti, Zr, Cr and Zn; adding B and the misch metal; conducting the furnace refining on the alloy melt; slagging the alloy melt after the refining; pressing Mg into the alloy melt after stewing; adjusting the temperature of the melt for standby; pouring the melt in an electromagnetic continuous casting machine; preparing an aluminum alloy ingot casting; lifting up the aluminum alloy ingot casting for homogenizing annealing and scalping for standby; putting the aluminum alloy ingot casting into an extrusion die for extrusion, extruding an aluminum alloy wire disc; and conducting wire drawing till the specification and the diameter reach the standard and using. The ultra-fine grain aluminum alloy gold welding wire can effectively improve the structural strength of a welding structure and the welding performance, and overcomes the welding defects of the low strength of an aluminum alloy welding joint and welding cracks.

Description

technical field [0001] The invention relates to the field of aluminum alloy welding materials, in particular to an ultrafine grain aluminum alloy welding wire and a preparation method thereof. Background technique [0002] Because of its small specific gravity, good corrosion resistance, high electrical conductivity and thermal conductivity, aluminum and its alloys are widely used in aviation, navigation, military industry, transportation, bridges, electrical and electronic fields. Aluminum alloy welding is a necessary means for the wide application of aluminum alloy materials. The characteristics of aluminum alloy welding are mainly reflected in the following aspects: 1. The affinity between aluminum and oxygen is very high. In the air, aluminum is easily combined with oxygen to form a tight and strong Al. 2 o 3 The thin film hinders the melting of the base metal and the good combination between each other, and is easy to cause slag inclusions, and the oxide film will also...

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 任政张潇朱秀荣任静汤进军谭锁奎连付奎赵宝荣
Owner CHINA WEAPON SCI ACADEMY NINGBO BRANCH
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