Vacuum brazing method for aluminum alloy solderless piece

A brazing method and aluminum alloy technology, applied in welding equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of overflowing solder, complicated production process, increasing the difficulty of vacuum brazing quality control, etc., so as to avoid welding seam pores. , the effect of reducing the temperature

Inactive Publication Date: 2015-03-11
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing aluminum alloy vacuum brazing technology has the following disadvantages: complex production process, long production cycle, serious solder overflow during brazing, etc. In addition, solder tab design, solder tab cutting and soldering Sheet pretreatment and other work, greatly increasing the difficulty of vacuum brazing quality control

Method used

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  • Vacuum brazing method for aluminum alloy solderless piece
  • Vacuum brazing method for aluminum alloy solderless piece
  • Vacuum brazing method for aluminum alloy solderless piece

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Embodiment Construction

[0032] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] The invention provides a vacuum brazing method for an aluminum alloy without a welding piece, which comprises the following steps:

[0034] 1) Select high-purity pure aluminum target and pure silicon target;

[0035] 2) Use acetone and alcohol to wipe the target and the parts to be welded sequentially to remove oil stains;

[0036] Wipe the pure aluminum and pure silicon targets with acetone for 3 minutes each;

[0037] wipe with alcohol figure 2 Parts to be welded in (a), 3min;

[0038] 3) use image 3 The magnetron sputtering method in the method deposits a pure aluminum film and a pure silicon film on the surface of the workpiece to be welded;

[0039] Place the target and the parts to be welded in the vacuum of the magnetron sputtering equipment and fix them;

[0040] Set the vacuum of the vacuum chamber to 6.5×10 -4 Pa, the working pressure is 1.1...

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Abstract

The invention provides a vacuum brazing method for an aluminum alloy solderless piece. The method comprises the following steps that (1) a high-purity pure aluminum target material and a pure silicon target material are selected; (2) acetone and ethyl alcohol are sequentially adopted to wipe the target materials and a to-be-soldered part so as to remove oil contamination; (3) a magnetron sputtering method is utilized for depositing a pure aluminum thin film and a pure silicon thin film on the surface of the to-be-soldered part; (4) the to-be-soldered part with the thin films deposited on the surface is taken out of a vacuum chamber; (5) the to-be-soldered part is assembled; (6) the assembled the to-be-soldered part is conveyed to a vacuum brazing furnace to be heated and soldered; and (7) the to-be-soldered part is cooled to the room temperature and is taken out. The vacuum brazing method has the advantages that a solder piece is not adopted; the requirement that according to an existing vacuum brazing technology, a soldering face of a to-be-soldered workpiece must be a plane is avoided; vacuum brazing of structures of a slope, a curved surface and the like is smoothly achieved; and processes of solder piece design, solder piece cutting, solder piece cleaning and the like are avoided.

Description

technical field [0001] The invention relates to a brazing method, in particular to an aluminum alloy vacuum brazing method. Background technique [0002] Vacuum brazing technology is widely used in the fields of aerospace industry, nuclear energy industry, electronics industry, and automobile industry. This method has the advantages of uniform heating of workpieces, good quality of brazed seam formation, and small deformation. However, the existing aluminum alloy vacuum brazing technology has the following disadvantages: complex production process, long production cycle, serious solder overflow during brazing, etc. In addition, solder tab design, solder tab cutting and soldering Chip pretreatment and other work have greatly increased the difficulty of vacuum brazing quality control. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a vacuum brazing method for aluminum alloys without solder tabs, which can realize ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/008B23K1/20
CPCB23K1/008B23K1/20
Inventor 栾兆菊杨靖辉李正方坤王传伟
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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