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Manufacturing method of three-layer composite aluminum alloy brazing filler metal plate for aviation

A manufacturing method and technology of composite brazing filler metal, applied in the field of preparation of aluminum alloy three-layer composite brazing filler metal sheet material, can solve the problems of low rigidity, brazing leakage, low strength, etc., and achieve excellent comprehensive performance and good surface quality Effect

Active Publication Date: 2015-03-04
NORTHEAST LIGHT ALLOY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The content of the present invention is to solve the problems of brazing leakage, brazing deformation, low strength and low rigidity after brazing when the existing aluminum alloy three-layer composite solder is applied to aviation products, and to provide a Manufacturing method of aluminum alloy three-layer composite solder plate

Method used

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specific Embodiment approach 1

[0023] Embodiment 1: This embodiment is a method for manufacturing an aluminum alloy three-layer composite solder plate for aviation, which is specifically completed according to the following steps:

[0024] 1. Weighing: According to the mass percentage of each element, Mn: 1.0%~1.3%, Cu: 0.4%~0.6%, Mg: 0.2%~0.3%, Ti: 0.1%~0.25%, Si: 0.01%~0.2% , Fe: 0.05% ~ 0.35%, Zn: 0.01% ~ 0.05%, and the balance Al, respectively weigh pure aluminum ingots, pure copper ingots, pure magnesium ingots, pure zinc ingots, aluminum-titanium alloy ingots and aluminum-titanium-boron grains refiner;

[0025] 2. Preparation of square ingots: The pure aluminum ingots, pure copper ingots, pure magnesium ingots, pure zinc ingots, aluminum-titanium alloy ingots and aluminum-titanium-boron grain refiners weighed in step 1 are heated at a temperature of 740°C to 760°C. ℃ under the condition of smelting for 8h~10h to obtain molten aluminum alloy; then under the conditions of casting temperature of 720℃~74...

specific Embodiment approach 2

[0042] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: in step 1, according to the mass percentage of each element, Mn: 1.2%, Cu: 0.55%, Mg: 0.25%, Ti: 0.2%, Si: 0.1% , Fe: 0.15%, Zn: 0.03% and the balance Al, respectively weigh pure aluminum ingot, pure copper ingot, pure magnesium ingot, pure zinc ingot, aluminum-titanium alloy ingot and aluminum-titanium-boron grain refiner. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that in step two, the pure aluminum ingots, pure copper ingots, pure magnesium ingots, pure zinc ingots, aluminum-titanium alloys weighed in step one The ingot and AlTiB grain refiner were smelted at a temperature of 750°C for 9 hours to obtain an aluminum alloy melt; and then cast at a casting temperature of 730°C, a casting speed of 55mm / min and a cooling water pressure of 0.1MPa The molten aluminum alloy is cast into a square ingot with a thickness of 300 mm, a width of 1320 mm and a length of 3800 mm. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a manufacturing method of a three-layer composite aluminum alloy brazing filler metal plate for aviation, relates to a manufacturing method of a three-layer composite aluminum alloy brazing filler metal plate material, and aims to solve the problems of high probability of brazing leakage and brazing deformation, low strength after brazing and low rigidity when conventional three-layer composite aluminum alloy brazing filler metal is applied to an aviation product. The manufacturing method comprises steps as follows: 1, weighing; 2, preparation of a square cast ingot; 3, homogenizing annealing; 4, coating; 5, welding; 6, hot rolling; 7, annealing; 8, cold rolling; and 9, straightening and slitting to obtain the three-layer composite aluminum alloy brazing filler metal plate for aviation. According to the manufacturing method, the tensile strength of the material can reach 155 N / mm<2>-168 N / mm<2>, the proof strength at non-proportional extension in three days at the temperature of 90 DEG C can reach 62 N / mm<2>-73 N / mm<2>, and the proof strength at non-proportional extension in seven days at the temperature of 90 DEG C can reach 71 N / mm<2>-77 N / mm<2>. By means of the manufacturing method, the three-layer composite aluminum alloy brazing filler metal plate for aviation can be obtained.

Description

technical field [0001] The invention relates to a preparation method of an aluminum alloy three-layer composite solder plate material. Background technique [0002] At present, my country's 434 three-layer composite solder plate has been widely used in heat exchangers of various aviation products. However, due to the harsh environment in which it is used, the reliability and corrosion resistance of the product often deteriorate and the service life is shortened; the material is also prone to brazing leakage, brazing deformation, and low strength after brazing during the brazing process. , rigidity can not be guaranteed and other issues, can not meet the requirements of use. Contents of the invention [0003] The content of the present invention is to solve the problems of brazing leakage, brazing deformation, low strength and low rigidity after brazing when the existing aluminum alloy three-layer composite solder is applied to aviation products, and to provide a kind of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22F1/04
CPCC22F1/04
Inventor 王英君刘平吕丹佟有志张雅玲丛福官王强韩啸张云龙路丽英
Owner NORTHEAST LIGHT ALLOY CO LTD
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