Aluminum-based interlayer alloy and preparation method and application thereof

An intermediate layer and aluminum alloy technology, applied in metal processing equipment, manufacturing tools, welding equipment, etc., can solve the problems of difficult to obtain welding bonding ability, expensive Ag-based solder, etc., and achieve good wettability and spreadability, low cost Effect of low, good wetting and spreading

Active Publication Date: 2021-10-01
CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, there are many difficulties in the connection of aluminum alloys and ceramics at present. Although the widely used Ag-based brazing filler metals in the market can meet the needs of some occasions, the Ag-based brazing filler metals are relatively expensive.
When Al-Si based solder is used at a lower cost, the joint strength is much lower than that of Ag-based solder, and it is more difficult to obtain good welding bonding ability

Method used

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  • Aluminum-based interlayer alloy and preparation method and application thereof
  • Aluminum-based interlayer alloy and preparation method and application thereof

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preparation example Construction

[0050] Correspondingly, the present application also provides a method for preparing the above-mentioned aluminum-based interlayer alloy, which may include, for example, the following steps: according to the chemical composition ratio of the aluminum-based interlayer alloy, the corresponding alloys containing Si, Cu, Mg, Ni, La, The raw materials of B and Al are smelted into an alloy ingot.

[0051] For reference, vacuum smelting can specifically feed the alloy into a vacuum smelting furnace, then vacuumize, heat, pour, and finally cool with the furnace.

[0052] In an optional embodiment, the heating temperature in the vacuum melting process can be 950-1050°C (such as 950°C, 1000°C or 1050°C, etc.), and the heating time can be 25-35min (such as 25min, 30min or 35min, etc.) .

[0053] Further, the alloy ingot is cut into alloy strips and subjected to surface treatment, followed by rapid quenching to obtain sheet-shaped aluminum-based interlayer alloy strips.

[0054] Wherein...

Embodiment 1

[0066] The present embodiment provides a sheet-shaped aluminum-based intermediate layer strip (such as figure 1 shown), which consists of the following components by weight percentage: 11.5% Si, 3.0% Cu, 1.5% Mg, 1.0% Ni, 0.4% La and 0.4% B, and the balance is aluminum.

[0067] The preparation method of the above-mentioned flaky aluminum-based intermediate layer strip includes the following steps: mixing Si, Cu, Mg, Ni, La, B and Al in proportion, and then vacuum smelting into an alloy ingot, and the heating temperature during the smelting process is 1000 ℃, the heating time is 30min. Wire-cut the smelted alloy ingot to obtain alloy bars, then sandblast the alloy bars to remove surface oil stains, and then ultrasonically clean the sandblasted alloy bars with alcohol and acetone to remove surface oil stains. The cleaned alloy strips were subjected to rapid quenching. During the rapid quenching process, the rotating speed of the roller was 600r / min, and the flow rate of argon ...

Embodiment 2

[0072] This embodiment provides a sheet-shaped aluminum-based interlayer strip with a thickness of 70 μm and a width of 60 mm, which is composed of the following components in weight percent: 11.0% Si, 2.0% Cu, 1.5% Mg, 1.0% Ni, 0.6 %La and 0.5% B, the balance being Al.

[0073] The preparation method of the above-mentioned flaky aluminum-based intermediate layer strip includes the following steps: mixing Si, Cu, Mg, Ni, La, B and Al in proportion, and then vacuum melting into an alloy ingot, and the heating temperature during the melting process is 950 ℃, the heating time is 35min. Wire-cut the smelted alloy ingot to obtain alloy bars, then sandblast the alloy bars to remove surface oil stains, and then ultrasonically clean the sandblasted alloy bars with alcohol and acetone to remove surface oil stains. The cleaned alloy strips were subjected to rapid quenching. During the rapid quenching process, the rotating speed of the roller was 400r / min, and the flow rate of argon gas...

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Abstract

The invention discloses an aluminum-based interlayer alloy and a preparation method and application thereof, and belongs to the technical field of welding. The aluminum-based interlayer alloy comprises the following chemical components of, in percentage by weight, 11%-12% of Si, 2%-4% of Cu, 1%-2% of Mg, 0.6%-1.5% of Ni, 0.2%-1% of La, 0.1%-0.5% of B and the balance Al. When an aluminum-based interlayer material is applied to the welding process of two different types of welding base materials, the problem that in the direct brazing process, due to the fact that the bonding types of the two different types of welding base materials are different, the difference of linear expansion coefficients is larger, and consequently the welding performance is poor can be effectively solved, the shear strength of a joint during direct brazing is equivalent to or higher than the shear strength of an indirect brazing joint under the same welding process, and the corresponding welding performance is superior to the bonding strength of Al-Si series brazing filler metal and Ag-Cu-Ti brazing filler metal which are more widely applied in the market.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to an aluminum-based intermediate layer alloy, a preparation method and application thereof. Background technique [0002] al 2 o 3 Ceramics have excellent wear resistance, high temperature resistance, high strength, corrosion resistance and insulation properties, and have good application prospects in aerospace, automotive electronics and other fields. However, due to the inherent brittleness and poor cold workability of ceramic materials, it is difficult to process and prepare large ceramic complex parts, which greatly limits its application in many fields. A large number of studies have shown that combining the advantages of high strength, high toughness and excellent cold workability of metal materials with ceramics can make up for the shortcomings of ceramic materials. Among many metals and alloys, aluminum and aluminum alloys can be widely used in transportation, aerospace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40B23K1/00B23K20/02
CPCB23K35/286B23K35/40B23K1/00B23K20/026
Inventor 李琪刘凤美熊敏高海涛易耀勇李丽坤张雪莹
Owner CHINA-UKRAINE INST OF WELDING GUANGDONG ACAD OF SCI
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