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Cadmium-free silver solder containing gallium, indium, and rare earth neodymium and cerium

A technology of silver solder and rare earth, applied in the direction of welding/cutting medium/material, welding medium, manufacturing tools, etc., to achieve the effect of eliminating pollution and protecting body safety

Active Publication Date: 2009-06-10
金华市金钟焊接材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no suitable cadmium-free alternative product with superior performance on the market.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] According to the proportion by mass percentage, its composition is: 30.0% copper (Cu), 32.0% zinc (Zn), 1.0% tin (Sn), 0.1% gallium (Ga), 0.1% indium (In), 0.10% neodymium (Nd ), 0.10% cerium (Ce), and the rest is silver (Ag).

[0011] The solidus temperature of the "cadmium-free silver solder containing gallium, indium, rare earth neodymium and cerium" obtained from the above composition ratio is about 690°C, and the liquidus temperature is about 770°C (experimental error is considered), and FB102 ( QJ102) brazing flux, brazing joint strength when the brazing base metal is the following combination, see the data in brackets: copper - brass (σ b =170±15MPa, τ=170±10MPa), brass-carbon steel (σ b =260±15MPa, τ=200±10MPa), stainless steel-nickel-based alloy (σ b =300±15MPa, τ=230±10MPa).

Embodiment 2

[0013] According to the proportion by mass percentage, its composition is: 40.0% copper (Cu), 28.0% zinc (Zn), 0.01% tin (Sn), 2.0% gallium (Ga), 2.0% indium (In), 0.001% neodymium (Nd ), 0.001% cerium (Ce), and the rest is silver (Ag).

[0014] The solidus temperature of the "cadmium-free silver solder containing gallium, indium, rare earth neodymium and cerium" obtained by the above-mentioned composition ratio is about 680°C, and the liquidus temperature is about 755°C (experimental error is considered), and FB102 ( QJ102) brazing flux, brazing joint strength when the brazing base metal is the following combination, see the data in brackets: copper - brass (σ b =170±15MPa, τ=170±10MPa), brass-carbon steel (σ b =260±15MPa, τ=200±10MPa), stainless steel-nickel-based alloy (σ b =300±15MPa, τ=230±10MPa).

Embodiment 3

[0016] According to the proportion by mass percentage, its composition is: 35.0% copper (Cu), 30.0% zinc (Zn), 1.0% tin (Sn), 1.0% gallium (Ga), 1.0% indium (In), 0.001% neodymium (Nd ), 0.001% cerium (Ce), and the rest is silver (Ag).

[0017] The solidus temperature of the "cadmium-free silver solder containing gallium, indium, rare earth neodymium and cerium" obtained by the above-mentioned composition ratio is about 680°C, and the liquidus temperature is about 755°C (experimental error is considered), and FB102 ( QJ102) brazing flux, base metal for brazing and brazing seam strength data are identical with embodiment 1.

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Abstract

A non-Cd Ag solder containing Ga, In, Nd and Ce is proportionally prepared from Cu, Zn, Sn, Ga, In, Nd, Ce and Ag through smelting, casting or horizontal conticasting, extruding and drawing to obtain Ag solder wire.

Description

technical field [0001] The invention belongs to the category of welding materials, in particular to a cadmium-free silver solder containing gallium, indium, rare earth neodymium and cerium. Background technique [0002] At present, the solders used in the welding process at home and abroad are generally cadmium-containing silver solders BAg35CuZnCd and BAg40CuZnCd, which contain a large amount of "toxic element" cadmium (Cd) in their chemical composition. Due to the toxicity of cadmium-containing solder, the application of this cadmium-containing material in home appliance materials has been banned both at home and abroad. However, there is no suitable cadmium-free substitute product with superior performance on the market. Contents of the invention [0003] The purpose of the present invention is to address the deficiencies in the prior art, to provide a kind of gallium-indium-containing gallium-indium that can replace BAg35CuZnCd and BAg40CuZnCd in the brazing process a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30C22C5/08
Inventor 徐跃祥白武申建尧骆华明
Owner 金华市金钟焊接材料有限公司
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