Detail

Environmentally friendly self-brazing Copper solder

The development of replacing copper with aluminum is still limited by the characteristics of the material and has not yet been completely replaced. Therefore, there is a situation in which copper alloys and aluminum alloys coexist in a product. Therefore, the connection of aluminum alloy and copper alloy has become a problem that must be faced directly by replacing copper with aluminum....

1.The research and development background of Environmentally friendly self-brazing Copper solder

The development of replacing copper with aluminum is still limited by the characteristics of the material and has not yet been completely replaced. Therefore, there is a situation in which copper alloys and aluminum alloys coexist in a product. Therefore, the connection of aluminum alloy and copper alloy has become a problem that must be faced directly by replacing copper with aluminum.

Although there are already resistance welding, electromagnetic induction welding and other methods on the market that have solved the connection of some aluminum alloys and copper alloys,

However, there are also certain problems such as the inability to be welded due to differences in pipe diameters, which makes it impossible to completely solve the connection between copper alloy and aluminum alloy.

How to solve the reliable connection of copper alloys and aluminum alloys of complex workpieces is an important topic for Henan Chalco's technology research and development team. Therefore, the highly acclaimed "Environmentally friendly self-brazing Copper solder"

Product series: Cu-95-Y, Cu-85-Y, Cu-78-Y series

2.The Product specifications and performance of Environmentally friendly self-brazing Copper solder

Type

Ingredient

Melting point temperature

/ ℃

Wire diameter specification

/mm

Shape

Using Method

Joint strength

Corrosion resistance

Cu-95-Y

Zinc-

aluminum-

cesium-

rare earth

370-390

Φ1.6/Φ2.0 etc

Wire Shape;

Circle Shape

Flame brazing ;

Furnace Brazing ;

High frequency brazing

Tensile Strength≥80Mpa

Neutral salt spray test for 500 hours without leakage

Cu-85-Y

Zinc-

aluminum-

cesium-

rare earth

395-415

Φ1.6/Φ2.0 etc

Neutral salt spray test for 600 hours without leakage

Cu-78-Y

Zinc-

aluminum-

cesium-

rare earth

420-430

Φ1.6/Φ2.0 etc

Neutral salt spray test for 800 hours without leakage

3.The Superiority of Environmentally friendly self-brazing Copper solder

1) Stable performance

Since there is no gap, no solder leakage will be caused, and the ratio of solder to solder remains unchanged, so the product performance is stable.

2) Improve welding quality

The welding flux wrapped by seamless copper-aluminum solder will not absorb moisture, so the welding quality is stable, the welding porosity is low, and the pore leakage is less than 10ppm.

4.The Application fields of Environmentally friendly self-brazing Copper solder

   1.Power field---welding of aluminum wires and copper joints, copper bars and aluminum foils such as transformers and reactors;

   2.Electrical appliances field---welding of aluminum and copper tubes in condensers and evaporators in refrigerators and air conditioners;

   3.Aerospace field---aircraft air filter connector, rocket pilot valve connector

   4.Others---welding of copper wires and aluminum wires in radiators, motors, batteries, home appliances and other products;

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