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Self-fluxing silver solder containing Eu, Li, Al and nano-Mo

A silver brazing material, self-brazing technology, applied in the direction of welding/cutting media/materials, welding media, metal processing equipment, etc., can solve problems such as reducing the strength and toughness of brazing joints, potential safety hazards of structural parts, and increasing cost burdens. Achieve good self-brazing, high mechanical properties, and improve the effect of self-brazing

Active Publication Date: 2015-11-25
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the motor manufacturing industry, the high-silver AgCuZn solder containing 65% silver is the main connecting material for the welding of motor coils, but with the gradual increase in the amount of silver used, high-silver undoubtedly increases the cost burden
In addition, obvious slag is found in the brazing joint, which obviously reduces the strength and toughness of the brazing joint
For some workpieces that need to withstand multiple vibration loads and the welding of Ag / Cu, AgW and other electrical contacts, it is difficult to clean up the residue after brazing, which undoubtedly brings safety hazards to the entire structural parts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Solder composition: 45.0% Ag, 13.0% Zn, 1.0% Li, 0.001% Eu, 0.001% Al, 0.01% nano Mo, and the rest is Cu.

[0015] The "self-brazing silver solder containing Eu, Li, Al and nano-Mo" obtained by the above composition ratio uses flame brazing without using flux, and the copper-brass brazing seam strength: σ b = 210MPa, τ = 200MPa, which is equivalent to the mechanical properties of BAg65CuZn solder and B102 flux brazing copper-brass brazing joint.

Embodiment 2

[0017] Solder composition: 50.0% Ag, 10.0% Zn, 2.0% Li, 0.002% Eu, 0.005% Al, 0.1% nano Mo, and the rest is Cu.

[0018] The "self-brazing silver solder containing Eu, Li, Al and nano-Mo" obtained by the above composition ratio uses flame brazing without using flux, and the copper-brass brazing seam strength: σ b = 218MPa, τ = 210MPa, which is equivalent to the mechanical properties of BAg65CuZn solder and B102 flux brazing copper-brass brazing joint.

Embodiment 3

[0020] Solder composition: 55.0% Ag, 9.0% Zn, 3.0% Li, 0.003% Eu, 0.01% Al, 0.2% nano Mo, and the rest is Cu.

[0021] The "self-brazing silver solder containing Eu, Li, Al and nano-Mo" obtained by the above composition ratio uses flame brazing without using flux, and the copper-brass brazing seam strength: σ b = 225MPa, τ = 220MPa, which is equivalent to the mechanical properties of BAg65CuZn solder and B102 flux brazing copper-brass brazing joint.

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PUM

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Abstract

The invention discloses self-fluxing silver solder containing Eu, Li, Al and nano-Mo, and belongs to the field of metal connecting materials. The interconnecting material comprises 45.0%-62.0% of Ag, 9%-13% of Zn, 1%-5% of Li, 0.001%-0.02% of Eu, 0.001%-0.02% of Al, 0.01%-0.3% of nano-Mo and the balance Cu. By utilizing the coupling of rare earth Eu, Al and nano-Mo for modifying the performance of the Ag-Cu-Zn-Li solder, the self-fluxing performance and wettability of the solder are significantly improved, and the mechanical performance of soldered joints is significantly improved. The novel solder is good in self-fluxing performance, excellent in wettability, high in mechanical performance and especially suitable for performing tiny contact welding on pipes, tools, motors, electric appliances and the like without using soldering flux.

Description

technical field [0001] The invention relates to a self-brazing silver solder containing Eu, Li, Al and nanometer Mo, which belongs to the field of metal connecting materials. This connecting material is mainly suitable for the welding of small contacts such as pipe fittings, tools, motors, electrical appliances, etc., without the use of flux, and has "self-brazing performance". Compared with the traditional high-silver solder containing 65% silver, it has good wettability and mechanical properties. Background technique [0002] In the motor manufacturing industry, high-silver AgCuZn solder containing 65% silver is the main connecting material for motor coil welding, but with the gradual increase in the amount of silver used, high-silver undoubtedly increases the cost burden. In addition, obvious slag is found in the brazing seam, which obviously reduces the strength and toughness of the brazing seam. For some workpieces that need to withstand multiple vibration loads and t...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/3006
Inventor 张亮杨帆郭永环
Owner XUZHOU NORMAL UNIVERSITY