Aluminium based interlayer alloy for liquid phase diffusion weld

A liquid phase diffusion and interlayer technology, which is applied in the field of aluminum-based interlayer alloys in liquid phase diffusion welding of aluminum and aluminum alloys, can solve the problem of incomplete interaction between solder and base metal, difficulty in ensuring uniform solder wetting, low welding strength, etc. Problems, achieve the effect of reducing discontinuity, enhancing bonding force, and low welding cost

Inactive Publication Date: 2006-09-13
SHANDONG HUADIAN ENERGY SAVING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, vacuum brazing technology is very sensitive to slight changes in parameters, it is difficult to ensure uniform solder wetting, the interaction between solder and base metal is incomplete, the welding strength is low, and the pass rate is low; in addition, the use of vacuum equipment has high cost, long cycle and low efficiency.

Method used

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Examples

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Embodiment Construction

[0011] Specific examples of the present invention are given below.

[0012] An aluminum-based intermediate layer alloy for liquid phase diffusion welding, the weight percentage of each component is 8% of silicon, 2.5% of copper, 2% of magnesium, 0.03% of gallium, 0.02% of cerium, and the balance is Al.

[0013] The aluminum-based interlayer alloy was prepared as a thin film with a thickness of 0.05 mm.

[0014] The aluminum-based intermediate layer of this composition is used in the liquid phase diffusion welding of φ60×8 aluminum-silicon alloy pipe (LF2), and the result is: when stretched, it breaks on the base material, and the tensile strength is σ b =215MPa, reaching the tensile strength of base metal (σ b ≥170MPa); bending 90° without breaking.

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Abstract

The invention discloses an aluminum base middle-layer alloy for liquid phase diffusion welding. The weight percentage of each element is: aluminum 60-95%, silicon 0.5-10%, copper 0.5-35%, magnesium 0.5-10%, gallium 0.001-1%, rare earth 0.001-0.1%. It can be applied to the weld of each kind of aluminum and aluminum alloy product.

Description

technical field [0001] The invention relates to an aluminum-based interlayer alloy for liquid-phase diffusion welding, in particular to an aluminum-based interlayer alloy for liquid-phase diffusion welding of aluminum and aluminum alloys. Background technique [0002] Aluminum and aluminum alloys are widely used in aviation, aerospace, military and civil fields due to their low density, good corrosion resistance, and excellent thermal and electrical conductivity. Because there is a very dense oxide film on the surface of aluminum and its alloys, the property of this oxide film is very stable, it can fully resist the erosion of the atmosphere, and it can form a new film at any time when the old film is broken, so aluminum and its alloys are very Difficult to solder. [0003] Someone used vacuum brazing technology to weld aluminum and its alloys. Mg was added to the solder as the main element to remove the oxide film, and the oxide film was removed under vacuum conditions. H...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28C22C21/12
Inventor 李辛庚王学刚严黔
Owner SHANDONG HUADIAN ENERGY SAVING TECH
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