Brazing filler metal, brazing filler metal, preparation method and application thereof, and prepared brazing product

An alloy and solder technology, applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve the problems affecting the mechanical properties of solder brazing process joints, the reliability of joints cannot be guaranteed, and the corrosion resistance is poor. The effect of reducing the exposed area, reducing the tendency of intergranular corrosion, and improving brazing strength

Active Publication Date: 2021-12-07
HENAN MECHANICAL & ELECTRICAL VOCATIONAL COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current commercially available Zn-Al-based solder generally has the problem of low brazing strength, the shear strength is only 30-40MPa, and the corrosion resistance is poor. The phenomenon of "aging" and "brittleness" is prone to occur during storage, which seriously affects the brazing strength. The brazing process of the material and the mechanical properties of the joint, the reliability of the joint cannot be guaranteed

Method used

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  • Brazing filler metal, brazing filler metal, preparation method and application thereof, and prepared brazing product
  • Brazing filler metal, brazing filler metal, preparation method and application thereof, and prepared brazing product
  • Brazing filler metal, brazing filler metal, preparation method and application thereof, and prepared brazing product

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preparation example Construction

[0071] According to one aspect of the present invention, a kind of preparation method of above-mentioned solder alloy, described preparation method comprises the following steps:

[0072] providing a mixture containing the components in formulated amounts, followed by alloying the mixture to produce a solder alloy;

[0073] The preparation method of the solder alloy provided by the present invention, the preparation method is to first provide a mixture containing the components of the formula, and then alloy the mixture to obtain the solder alloy. The above preparation method has the advantages of short process flow and simple equipment The advantages of easy operation can realize mass industrial production of solder alloys.

[0074] In a preferred embodiment of the present invention, the preparation method comprises the following steps:

[0075] (A), Mg, Ni, Cr, Ga and the rare earth element of formula quantity are mixed and alloyed with the Al of partial quantity respective...

Embodiment 1～12

[0125] A kind of brazing filler metal, by mass percentage, described brazing filler metal is prepared from the following raw materials:

[0126]

[0127]

[0128] The preparation method of described solder comprises the following steps:

[0129] (1), Mg, Ni, Cr, Ga and the rare earth element of formula quantity are mixed and alloyed with the Al of partial quantity respectively, form AlMg alloy, AlNi alloy, AlCr alloy, AlGa alloy and Al-rare earth alloy respectively;

[0130] Wherein, the Mg content in the AlMg alloy is 15wt%; the Ni content in the AlNi alloy is 10wt%; the Cr content in the AlCr alloy is 10wt%; the Ga content in the AlGa alloy is 30wt%;

[0131] (2), put the graphite crucible in the resistance furnace to preheat, place the remaining amount of Al in the crucible, and then raise the temperature of the resistance furnace to 725-735°C;

[0132] (3) After the remaining amount of Al is completely melted, add AlNi alloy and AlCr alloy, heat up to 780-860°C, and...

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Abstract

The invention provides a brazing material alloy, a brazing material, a preparation method and application thereof, and a prepared brazing product, and relates to the technical field of welding materials. The above-mentioned solder alloy is prepared on the basis of traditional Zn-Al-based solder by adding Mg, Ni, Cr, Ga and rare earth elements in a specific composition ratio. Among them, Ni in the above-mentioned solder alloy can increase the strength of the solder; Mg can increase the electrode potential of the solder; Cr can form a dense oxide film to reduce the corrosion rate; Ga can improve the adhesion of corrosion products, making it evenly covered on the solder On the surface, the exposed area of ​​solder is reduced; rare earth elements can refine the grains and purify the interface, reducing the tendency of intergranular corrosion. The present invention can realize synergistic effects through the reasonable proportioning of the above-mentioned components, while improving the brazing strength of the brazing filler metal, it can also ensure that the brazing filler metal has good corrosion resistance, and can fully meet the requirements of existing aluminum- Process requirements for brazing connections of copper materials.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a brazing alloy, a brazing filler metal, a preparation method and application thereof, and a prepared brazing product. Background technique [0002] In refrigeration, electric power, electronics and other industries, aluminum is often used instead of copper for the purpose of lightening the structure and saving costs. However, in view of the difference in certain properties between aluminum and copper, some important structural parts must be made of copper, so there are corresponding technical problems of aluminum-copper connection in the preparation process of some parts. [0003] At present, the aluminum-copper connection methods mainly include fusion welding, pressure welding and brazing. Among them, the fusion welding joint has low strength and is not suitable for aluminum-copper connection; the pressure welding joint has the best quality, but the equipment is expe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28B23K35/40
CPCB23K35/28B23K35/282B23K35/40
Inventor 杜全斌张肇伟范九红李伟刘春鹏王星星
Owner HENAN MECHANICAL & ELECTRICAL VOCATIONAL COLLEGE
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