Preparation method of aluminum alloy conformal solder
An aluminum alloy and brazing material technology, applied in metal processing equipment, metal material coating technology, welding equipment and other directions, can solve the problems that hinder the simplification of vacuum brazing technology, cumbersome processes, and affect the application and expansion of vacuum brazing technology. The effect of small thickness of brazing filler metal, simplifying process and reducing brazing temperature
Active Publication Date: 2016-02-10
CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
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Problems solved by technology
This method first requires a cumbersome process to prepare the solder sheet, secondly, a series of tedious processes such as solder sheet design and cleaning are required during the use of the solder sheet, and finally, some approximately harsh requirements are put forward for the workpiece to be welded
The above-mentioned disadvantages of the use of soldering sheets have greatly affected the expansion of the application of vacuum brazing technology and hindered the simplification of vacuum brazing technology.
Method used
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[0023] The present invention will be described in detail below in conjunction with the accompanying drawings.
[0024] A kind of preparation method of aluminum alloy conformal solder of the present invention comprises the following steps:
[0025] 1) Made of 3A21 aluminum alloy figure 1 Aluminum alloy workpieces shown in;
[0026] The aluminum alloy workpiece and the silicon target were cleaned with an ultrasonic cleaner for 20 minutes, and the cleaning solution was alcohol.
[0027] 2) Install the silicon target in the vacuum chamber, place the aluminum alloy workpiece on the sample stage, use argon as the sputtering gas, and the background vacuum is 2×10 -5 Torr, the working vacuum is 75×10 -4 Torr, the rotation speed of the sample stage is 3r / min, the sputtering current is 1A, and the deposition time is 24min.
[0028] 3) The aluminum alloy workpiece deposited with the silicon film is taken out, placed in a tube furnace for annealing, the annealing temperature is 300° C...
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The invention provides a preparation method of aluminum alloy conformal brazing filler metal. The preparation method comprises the following steps: 1) cleaning an aluminum alloy workpiece and a silicon target; 2) installing the silicon target in a vacuum chamber, installing the aluminum alloy workpiece on a sample table and depositing a nanometer silicon thin film on the surface of the workpiece by adopting a magnetron sputtering method; 3) annealing the aluminum alloy workpiece and the nanometer silicon thin film; 4) depositing an aluminum thin film on the surface of the nanometer silicon thin film by adopting a sol-gel method; 5) annealing the workpiece, the nanometer silicon thin film and the aluminum thin film to form the aluminum alloy brazing filler metal which is conformed with the workpiece. The preparation method of aluminum alloy conformal brazing filler metal has the advantages that since the brazing filler metal and the workpiece to be brazed are conformed, no-lug vacuum brazing is realized, the brazing of any stereoscopic brazing surface can be realized, the preparation process of the brazing filler material is optimized and the vacuum brazing process is simplified.
Description
technical field [0001] The invention relates to a method for preparing solder, in particular to a method for preparing solder for vacuum brazing. Background technique [0002] Brazing filler metal is one of the necessary materials for aluminum alloy brazing, and the existing vacuum brazing technology uses solder sheet as the brazing filler metal. This method first requires a cumbersome process to prepare the solder sheet, and secondly, a series of tedious processes such as solder sheet design and cleaning are required during the use of the solder sheet. Finally, some approximately harsh requirements are put forward for the workpiece to be welded. The above-mentioned drawbacks of the use of solder tabs have greatly affected the expansion of the application of vacuum brazing technology and hindered the simplification of the vacuum brazing technology process. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a prepar...
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IPC IPC(8): B23K35/40
CPCB23K35/0238C23C14/16C23C14/35C23C14/5806C23C18/1254
Inventor 栾兆菊满慧余雷陈美芳柳龙华
Owner CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST