How to weld copper and aluminum, or there is another way to connect

There are several welding methods for copper and aluminum welding:

Method 1: LYODIN ALCU-Q303 welds copper and aluminum.

Description: A kind of self-brazing fluoride agent of the welding wire, in the process of welding, because there is no need to use any welding powder and flux is more favored by the operator, in the case of the temperature of the base metal up to 400 degrees, the end of the flame is slightly burned with the welding wire, and the molten welding wire will flow like water under the action of the powder. Because of its very good fluidity, it is especially used in the refrigeration industry, such as the socketing of copper and aluminum tubes, and the socketing of aluminum tubes and aluminum tubes.

In addition, in the transformer industry, the lap of copper and aluminum conductor bars, corner joints are also used a lot, how to make the connected conductive bars can work in a high-voltage and high-current environment, the compactness of the welding layer is particularly important.

Operation and performance description of copper and aluminum welding wire ALCU-Q303.

How ALCU-Q303 realizes copper and aluminum welding in the refrigeration industry.

Method 2: WE53 solid brazing metal solves the welding of all white metals, but aluminum alloys are used more, especially including aluminum alloys and various cast aluminum welding.

Description: Because WE53 is a solid brazing metal, there is no need to use any solder powder and flux in the welding process, and the strength after welding is very high, so it is generally necessary to have certain welding strength requirements, and the welding of products with special requirements for deformation is very suitable. When the temperature of the base metal reaches 400 degrees, the weld is formed by wiping the weld with WE53 like a rubber.

In the auto repair industry, it is particularly used in the repair welding of the root of the water tank and intercooler, the repair welding of the air conditioning pipe, the repair welding of the pipeline with a bad angle of the refrigerator, and the repair welding at the junction of thickness and thinness.

Method 3: M51+M51-F, low-temperature copper-aluminum welding.

Description: It belongs to low-temperature brazing copper-aluminum welding, for particularly thin, and even some exaggerated thin cases, the use of this welding is the most suitable, but field experience proves that the welded product must have a welding angle, if the welding angle is not good, the welding effect will be discounted, because the principle of this welding wire is completely formed by the heat conduction of the base metal fusion welding wire, the angle is not good to burn the welding wire and flux, it will lead to welding failure. It is mainly used in irregular welding, which is best to be formed at one time, as well as the welding of copper and aluminum enameled wires, which is especially used in the lead wires on electronic products and motor products.

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The biggest advantage of <> cold crimping machine is that there is no need to heat with electricity, and there is no filler material to make the metal conductor welded with a mold at room temperature. Practice has proved that the welding completed by the cold press is clean and fast, the structure of the welding joint remains unchanged, and the bending, extension and internal flux are better than the body. The success rate of the first wiring is guaranteed to be 100%.

It is suitable for welding copper, aluminum, enameled wire and other soft metal materials.

Copper and aluminum cannot be welded to each other.

Copper-aluminum welding is to connect copper materials and aluminum materials through welding processes. Because copper and aluminum are easily oxidized metals, the welding of copper and aluminum has always been an international welding problem.

Commonly used copper and aluminum welding methods:

1. Traditionally, the method of hanging tin and molten tin is commonly used to weld copper and aluminum, this method is not well formed, there is no good strength, because the melting point of tin is low and can not be welded in the workpiece under high temperature work, so this process is only suitable for use on small workpieces under low temperature conditions (only suitable for the welding of multi-strand copper wire and small specification aluminum enameled wire), it is difficult to apply to the production of other products.

2. Welding copper and aluminum by welding methods such as fusion welding, friction welding, cold pressure welding, ** welding, electron beam welding, ultrasonic welding, etc., the welded joint is brittle, easy to produce cracks and pores in the weld, and the welded workpiece will inevitably break, and the conductor may be broken and the pipeline leaks after the fracture, so it often fails to achieve the required effect in actual production.

3. Copper and aluminum are welded together by brazing (usually flame brazing, furnace brazing and high-frequency brazing, etc.), and the brazing material is used as an intermediate medium to weld copper and aluminum together through the brazing process (in fact, a metallurgical reaction occurs, and the brazing metal penetrates into the molecular structure of copper and aluminum through capillary action), and the joint is well formed after welding, and has good tensile and shear properties and conductivity and corrosion resistance, which is a commonly used copper-aluminum welding method at present.

Summary. OK.

Copper-to-aluminum welding can be done by fusion, pressure and brazing. However, due to the good plasticity of copper and aluminum, the compressibility of copper is up to 80% to 90%, and aluminum is also 60% to 80%. Therefore, at present, the pressure welding method is mainly used for welding.

The main difficulty of fusion welding is that the melting points of aluminum and copper are very different. During fusion welding, aluminum should be used as the main component of the weld, and the copper content should be controlled at 12% and 13%, otherwise it is easy to form solid solutions and cual2 brittle co-crystals on the grain boundaries, so that the strength and plasticity of the joint are reduced. When welding, the center of the arc should be biased to the side of the copper plate.

Can copper and aluminum alloys be welded.

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OK. Copper-to-aluminum welding can be done by fusion, pressure and brazing. However, due to the good plasticity of copper and aluminum, the compressibility of copper is up to 80% to 90%, and aluminum is also 60% to 80%.

Therefore, at present, the pressure welding method is mainly used for welding. The main difficulty of fusion welding is that the melting points of aluminum and copper are very different. During fusion welding, aluminum should be used as the main component of the weld, and the copper content should be controlled at 12% and 13%, otherwise it is easy to form solid solutions and cual2 brittle co-crystals on the grain boundaries, so that the strength and plasticity of the joint are reduced.

When welding, the center of the arc should be biased to the side of the copper plate.

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Copper and aluminum can be welded, welded with flame or high-frequency heating, and some small thin parts such as battery tabs, and the tabs of soft-pack lithium batteries are welded with electric soldering irons.

The mainstream of conventional copper and aluminum welding is as follows:

The first kind: high temperature 480 degrees, this kind of flux-cored wire-based, aluminum-zinc material, representative welding materials such as Viodin ALCU-Q303 copper-aluminum welding wire, in the welding process inside the wrapped powder will make the melted solder infiltrate and flow, this is commonly used in refrigeration and air conditioning copper and aluminum tube welding, transformer industry copper and aluminum terminal welding, etc., the main welding method is flame welding, or high frequency, or resistance welding, welding operation method relies on all available heat sources to heat the welded workpiece to about 500 degrees, and then the welding wire is lowered, and the flame is used to assist the welding wire to melt and form, the focus is that the temperature of the parent body should be enough, especially the temperature of copper, because the heat conduction and heat dissipation of copper are too fast.

The second kind: low temperature 179 degrees, this is a solid tin alloy welding wire, representative welding materials such as WeWelding M51 low temperature copper and aluminum welding wire, with M51-F flux welding, this is a separate auxiliary flux to break the metal surface tension reflected in the wettability, mainly used for copper aluminum wire, copper aluminum terminals, soft pack lithium battery tab welding, and some circuit aluminum terminal welding, welding method is generally flame welding or electric soldering iron welding, Soldering thin parts and small pieces such as copper and aluminum enameled wires, and the leads are generally welded with electric soldering irons, such as some terminals can be flame welded.

The above two are the mainstream of various welding copper and aluminum welding encountered in all walks of life, and they are also conventional welding methods.

Hello Tonghe aluminum can not be welded.

The general practice is to press the aluminum wire with a copper joint.

Aluminum and copper welding can be welded by low-temperature flame welding. Low-temperature flame welding can be divided into the following welding methods according to the choice of materials:

Low temperature 179 degrees flame welding aluminum and aluminum, aluminum and stainless steel, according to the size of the welding matrix to choose the appropriate heat source, such as electric soldering iron, or Viodin 53 special liquefied gas porous spray gun heating, the welding principle is completely by the matrix heat conduction fusion wire forming, welding wire selection Wewelding M51 (referred to as Weodin 51) with its supporting flux. Method 2: Copper and aluminum flux-cored wire at a low temperature of about 430 degrees, welding aluminum and aluminum, aluminum and stainless steel, welding with flame, this is suitable for medium-sized products, the welding wire model is made of wewelding Alcu-Q303 welding wire, the welding principle heats the welding wire under the matrix, and the welding wire is formed by slightly burning the welding wire with a flame.

Welding methods for aluminum and copper:

1. Friction welding, mainly suitable for the welding of rod-shaped objects.

2. ** welding, mainly suitable for the welding of plates and plates.

3. Gas welding, that is, brazing, is more flexible in application and is the welding method with the widest range of applications.

4. Diffusion welding, mainly suitable for surface connection.

5. Hand arc welding, welding risk is large, suitable for welding seam connection with low connection requirements, low cost and fast speed.

Welding methods for aluminum and aluminum:

1. AC argon arc welding machine is used for argon arc welding, and the corresponding aluminum welding wire is used.

2. MIG welding, as well as double-wire MIG welding, using the corresponding aluminum welding wire.

3. Gas welding, suitable for thin parts and small parts, recommended materials universal 55 welding wire, MG400 welding rod for gas welding.

4. Hand arc welding, DC welding machine is selected, and the welding rod is recommended MG400 electrode and universal 505 electrode with better performance, and the former is cheaper.