Brazing connection method for aluminum alloy and magnesium alloy

A connection method and technology of aluminum alloys, applied in welding medium, welding equipment, welding/welding/cutting items, etc., can solve the problems of ineffectiveness, cracks and pores, poor weldability of fusion welding, etc.

Inactive Publication Date: 2021-06-04
HARBIN ENG UNIV
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  • Abstract
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Problems solved by technology

[0002] The fusion weldability of magnesium alloy and aluminum alloy is very poor, and cracks and pores often occur after welding. During the brazing welding process, the oxide film of the aluminum alloy affects the wetting of the solder, and the traditional solder cannot guarantee The surface of aluminum alloy and magnesium alloy can spread well, so there is no better brazing connection method for connecting aluminum alloy and magnesium alloy at this stage

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  • Brazing connection method for aluminum alloy and magnesium alloy

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] combine figure 1 , a brazing connection method of an aluminum alloy and a magnesium alloy of the present invention, comprising the following steps:

[0030] S1: Accurately weigh the metal Sn and metal Zn according to the ratio of 7:3 according to the amount of brazing material to be used, and the weighing is accurate to 0.01g;

[0031] S2: Preheat the ceramic crucible with a crucible resistance furnace, and the preheating temperature of the crucible resistance furnace is 300°C±10°C;

[0032] S3: After the preheating process, add the eutectic mixture of metal Zn and a certain amount of surface covering agent KCl / LiCl weighed in step S1 into the ceramic crucible. The amount of surface covering agent used depends on whether Zn is completely covered. without exposure to air. And continue heating in the crucible resistance furnac...

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Abstract

The invention provides a brazing connection method for aluminum alloy and magnesium alloy. The technical key point of the method is that Sn_Zn brazing filler metal in a self-made shape is adopted to guarantee the wettability on the surfaces of the aluminum alloy and the magnesium alloy, formation of an oxidation film on the surface of the aluminum alloy is relieved in an ultrasonic-assisted mode in the welding process, and the situation that a dissimilar metal material product of the aluminum alloy / the magnesium alloy is brazed without brazing flux in the atmospheric environment can be guaranteed. The method has the advantages of being high in adaptability, convenient to use and reliable in use. The welding quality and the application performance of the product are guaranteed.

Description

technical field [0001] The invention relates to a brazing connection method of an aluminum alloy and a magnesium alloy, belonging to the technical field of welding. Background technique [0002] The fusion weldability of magnesium alloy and aluminum alloy is very poor, and cracks and pores often occur after welding. During the brazing welding process, the oxide film of the aluminum alloy affects the wetting of the solder, and the traditional solder cannot guarantee Both aluminum alloy and magnesium alloy surfaces can spread well, so there is no better brazing connection method for connecting aluminum alloy and magnesium alloy at this stage. Contents of the invention [0003] The object of the present invention is to provide a brazing connection method of aluminum alloy and magnesium alloy, which can effectively connect aluminum alloy and magnesium alloy. [0004] The object of the present invention is achieved like this: comprise the steps: [0005] S1: Accurately weigh ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K1/002B23K1/20B23K35/26B23K103/18
CPCB23K1/002B23K1/20B23K35/262B23K2103/18
Inventor 吕长生王立权王洪海
Owner HARBIN ENG UNIV
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