Cadmium-free silver based solder containing gallium, indium and cerium

A technology of silver-based solder and chemical composition, which is applied in the direction of welding/cutting media/materials, welding media, metal processing equipment, etc., can solve the problems of operator's physical safety, environmental pollution, etc., and achieve the improvement of plasticity and comprehensiveness Effects of mechanical properties, body safety avoidance, good wettability

Active Publication Date: 2007-05-16
CHANGSHU HUAYIN FILLER METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although BAg45CuZnCd has excellent performance, with the implementation of the EU "ROHS" directive on July 1, 2006, the use of cadmium-containing materials is gradually banned, because cadmium has an impact on the operator's physical safety and pollutes the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0008] According to the mass percentage ratio of the cadmium-free silver-based solder containing gallium, indium and cerium of the present invention, the specific implementation mode of the present invention is described.

specific Embodiment approach 1

[0009] According to the proportion by mass percentage, its composition is: 26.0% copper (Cu), 33.0% zinc (Zn), 0.5% gallium (Ga), 0.001% indium (In), 0.002% cerium (Ce), the rest is silver (Ag ).

[0010] The solidus temperature of the "cadmium-free silver-based solder containing gallium, indium and cerium" obtained from the above composition ratio is about 650°C, and the liquidus temperature is about 730°C (experimental error is considered), and FB102 (QJ102) See the data in brackets for the braze joint strength when the brazing base metal is the following combination: copper-brass (σ b =210±25MPa, τ=200±30MPa), brass-carbon steel (σ b =330±25MPa, τ=325±30MPa), stainless steel-nickel-based alloy (σ b =350±15MPa, τ=260±10MPa).

specific Embodiment approach 2

[0011] According to the proportion by mass percentage, its composition is: 35.0% copper (Cu), 20.0% zinc (Zn), 0.001% gallium (Ga), 0.3% indium (In), 0.10% cerium (Ce), the rest is silver (Ag ).

[0012] The solidus temperature of the "cadmium-free silver-based solder containing gallium, indium and cerium" obtained by the above composition ratio is about 650°C, and the liquidus temperature is about 740°C (experimental error is considered), and FB102 (QJ102) See the data in brackets for the braze joint strength when the brazing base metal is the following combination: copper-brass (σ b =210±25MPa, τ=200±30MPa), brass-carbon steel (σ b =330±25MPa, τ=325±30MPa), stainless steel-nickel-based alloy (σ b =350±15MPa, τ=260±10MPa).

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Abstract

The invention relates to a non-cadmium silver base solder with gallium, indium and cerium, wherein it comprises that 26.0%-35.0% copper, 20.0%-33.0% zinc, 0.001%-0.5% gallium, 0.001%-0.3% indium, 0.002%-0.10% cerium, and the left is silver. The invention has the advantages that: it can replace the solders as BAg45CuZnCd and BAg45CuZn. And it can reduce the fusion point by added gallium and indium, and it has cerium to refine the crystal of solder, to improve its property.

Description

technical field [0001] The invention relates to a cadmium-free silver-based solder containing gallium, indium and cerium, in particular to a cadmium-free silver-based solder suitable for brazing metal materials such as copper, brass, carbon steel, stainless steel and nickel-based alloys , belongs to metal materials and brazing materials in the field of metallurgy. Background technique [0002] The currently used silver solders BAg45CuZnCd and BAg45CuZn have a silver content of about 45% in their chemical composition. Although BAg45CuZnCd has excellent performance, with the implementation of the EU "ROHS" directive on July 1, 2006, the use of cadmium-containing materials is gradually banned, because cadmium has an impact on the operator's physical safety and pollutes the environment. Therefore, it is necessary to research and develop brazing materials with good brazing properties, suitable solid-liquidus temperature, and comprehensive properties comparable to or even better ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30
Inventor 顾文华薛松柏顾立勇顾建昌
Owner CHANGSHU HUAYIN FILLER METALS
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