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Brazing filler metal for high-frequency induction brazing of aluminum steel and brazing method of brazing filler metal

A technology of high-frequency induction brazing and brazing materials, applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of thermal conductivity and other physical properties difference, weld inclusions, etc., to avoid adverse effects Effect

Inactive Publication Date: 2011-08-17
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Application Information

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Problems solved by technology

However, the physical properties such as density, melting point, and thermal conductivity of aluminum and steel are very different, which promotes the generation of thermal stress, and the refractory oxide film will cause inclusions in the weld, and it is difficult to connect them with traditional welding processes. together

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  • Brazing filler metal for high-frequency induction brazing of aluminum steel and brazing method of brazing filler metal
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  • Brazing filler metal for high-frequency induction brazing of aluminum steel and brazing method of brazing filler metal

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Embodiment Construction

[0009] The invention relates to a brazing material for high-frequency induction brazing of aluminum steel and a brazing method, wherein the brazing material for high-frequency induction brazing of aluminum steel uses Al-Si-based alloy powder as the brazing material component of the solder, and the brazing material alloy The particle size is -150~+300 mesh, the melting point is 570~580℃; three kinds of fluoride salts KF, NaF and AlF are selected 3 As a flux, its ratio is (KF, NaF): AlF 3 = 1: 10); Potassium tartrate is selected as the binder; the solder content in the solder is 60%, the brazing flux content is 38-39%, and the binder accounts for 1%-2%.

[0010] Aluminum steel high-frequency induction brazing method, prepare each component according to the above, make a paste with absolute ethanol, remove the oxide film on the surface of the steel and aluminum workpiece to be brazed, and then clean it with acetone; Evenly coat the adjusted solder on the welding surface and pres...

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Abstract

The invention relates to a brazing filler metal for high-frequency induction brazing of aluminum steel and a brazing method of the brazing filler metal. In the brazing filler metal, Al-Si based alloy powder is used as a brazing filler metal component of a welding flux; the granularity of the brazing filler metal alloy is -150 to +300 meshes, and the melting point of the brazing filler metal alloy is 570 to 580 DEG C; three kinds of villiaumite, namely KF, NaF and AlF3, are used as a brazing flux in a ratio of (KF and NaF) to AlF3 of 1 to 10; sodium potassium tartrate is used as a bonding agent; and the content of the brazing filler metal in the welding flux is 60 percent, the content of the brazing flux is 38 to 39 percent, and the bonding agent accounts for 1 to 2 percent. The brazing method comprises the following steps of: preparing the components; making the components pasty by using absolute ethanol; removing oxidized membranes from the surfaces to be brazed of steel and aluminum workpieces, and washing by using acetone; uniformly coating the mixed welding flux on the surfaces to be brazed and pressurizing, placing the welding flux into high-frequency induction heating equipment and protecting by using argon; and under a voltage of 4.5kV, heating for 30 seconds and unloading the voltage, and taking the workpiece out if the temperature of the workpiece is below 50 DEG C.

Description

technical field [0001] The invention relates to the technical field of aluminum / steel brazing. Background technique [0002] At present, more than 50% of the electric energy used in my country's electrolytic aluminum production is consumed by the aluminum electrolytic cell and the electric field, magnetic field and thermal field in the production process, and electrolytic aluminum production still has great energy-saving potential. Now the common aluminum electrolytic anode steel claw is made of low-carbon cast steel, and the combination of steel-aluminum composite explosive welding sheet transition and aluminum guide rod welding is used to form an anode conductive device, which mainly plays the role of conducting current and carrying the weight of the anode carbon block. , mainly conductive. This kind of steel-aluminum composite explosive welding sheet has high local voltage drop and large current loss in the electrolytic production process, which leads to excessive consum...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K1/002
Inventor 寇生中李望南丁雨田胡勇李春燕杨芳
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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