Flux-cored wire for copper and aluminum welding

A flux-cored wire, copper-aluminum technology, used in welding/welding/cutting items, welding media, welding equipment, etc., can solve the problems of poor wettability and penetration, poor wettability and penetration, and low melting point of solder , to achieve good wettability and penetration ability, no corrosion after welding, good air tightness after welding

Active Publication Date: 2012-05-09
LICHUANG TAISHAN ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pure Zn-Al flux-cored wire combined with this flux cannot meet the requirements after welding, mainly the tensile strength, air tightness and aging resistance after welding, the melting point of solder is low, and the wettability and penetration ability are relatively poor
In recent years, Germany, the United States, and South Korea have successively developed some new Zn-Al flux-cored wires and entered the Chinese market, but they have not been generally welcomed by users. There are still many deficiencies
Among them, the main disadvantages are (1) low melting point of solder, generally only 380-420°C; (2) poor wettability and permeability

Method used

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  • Flux-cored wire for copper and aluminum welding
  • Flux-cored wire for copper and aluminum welding
  • Flux-cored wire for copper and aluminum welding

Examples

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Embodiment 1

[0020] A flux-cored wire for copper-aluminum welding, the chemical composition and weight percentage of the wire material are: Ce0.001%, La 1.0%, Cu 0.1%, Ag 10%, Si 0.01%, Al 1%, and the rest is Zn and other unavoidable impurities. This alloy is matched with commercially available KF-AlF 3 Flux and CsF-AlF 3 Flux, the finished flux-cored wire is produced through the forming machine, wire drawing, and wire winding procedures.

Embodiment 2

[0022] A flux-cored wire for copper-aluminum welding, the chemical composition and weight percentage of the wire material are: Ce 1.0%, La 0.1%, Cu 15%, Ag 3%, Si 1%, Al 3%, and the rest is Zn and other unavoidable impurities. This alloy is matched with commercially available KF-AlF 3 Flux and CsF-AlF 3 Flux, the finished flux-cored wire is produced through the forming machine, wire drawing, and wire winding procedures.

Embodiment 3

[0024] A flux-cored welding wire for copper-aluminum welding, the chemical composition and weight percentage of the welding wire material are: Ce0.009%, La 0.008%, Cu 6%, Ag 0.05%, Si 12%, Al 10%, and the rest is Zn and other unavoidable impurities. This alloy is matched with commercially available KF-AlF 3 Flux and CsF-AlF 3 Flux, the finished flux-cored wire is produced through the forming machine, wire drawing, and wire winding procedures.

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Abstract

The invention discloses a flux-cored wire for copper and aluminum welding. The wire comprises the following chemical components in percentage by weight: 0-1.0 percent of Ce, 0-1.0 pecent of La, 0-15 percent of Cu, 0-10 percent of Ag, 0-12 percent of Si, 1-15 percent of Al and the balance of Zn and the other inevitable impurities. In the invention, the chemical components of the wire are designed reasonably, so that the wire has the characteristics of high wettability, high penetrating capability, high pulling performance, high fluidity, high welding strength, high air tightness after welding, no corrosion after welding, and the like.

Description

technical field [0001] The invention relates to a welding wire material, in particular to a flux-cored welding wire used for copper-aluminum welding. Background technique [0002] Traditional heat exchangers in the automotive, air-conditioning and refrigeration industries use copper as the main material. Because copper has a high melting point and is easy to weld, and secondly, copper has good thermal conductivity, tensile strength, blast resistance and anti-leakage ability, so it is widely used. Today, with the resource shortage of copper, the price of copper is soaring rapidly, which makes the cost pressure of manufacturers in the automobile, air-conditioning and refrigeration industries increasing. This has also led the industry to look for alternatives to copper. With the development of science and technology, a new type of copper pipe substitute - copper-aluminum composite pipe has come out, and has been favored by many manufacturers. The heat exchange effect of copp...

Claims

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Application Information

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IPC IPC(8): B23K35/28B23K103/18
Inventor 梁力强何锡坚梁洁明范晶波
Owner LICHUANG TAISHAN ELECTRONICS TECH
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