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Low-silver-content cadmium-free solder

A technology of silver content and brazing material, applied in welding/cutting medium/material, welding medium, metal processing equipment, etc., can solve the problem of cadmium harmful environmental pollution, disadvantage, etc. The effect of high wettability

Inactive Publication Date: 2014-07-09
JINHUA SANHUAN WELDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the harmful effects of cadmium on human health and adverse effects on environmental pollution, certain restrictions have been placed on the use of cadmium-containing materials internationally.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] According to the composition of the solder alloy, the weight percentage of the alloy composition is: 24% silver, 31.5% zinc, 0.8% manganese, 0.5% nickel, and the balance is copper. Process the prepared solder into a wire with a diameter of 2.0mm, and use FB102 brazing flux to weld the copper alloy base metal by conventional methods. The temperature is about 800°C, and the brazing temperature is about 905°C.

Embodiment 2

[0013] According to the composition of the solder alloy, the weight percentage of the alloy composition is: 25% silver, 33% zinc, 0.8% manganese, 0.5% nickel, and the balance is copper. Process the prepared solder into a wire with a diameter of 2.0mm, and use FB102 brazing flux to weld the copper alloy base metal by conventional methods. The temperature is about 793°C, and the brazing temperature is about 899°C.

Embodiment 3

[0015] According to the composition of the solder alloy, the weight percentage of the alloy composition is: 26% silver, 35% zinc, 0.8% manganese, 0.5% nickel, and the balance is copper. Process the prepared solder into a wire with a diameter of 2.0mm, and use FB102 brazing flux to weld the copper alloy base metal by conventional methods. The temperature is about 787°C, and the brazing temperature is about 891°C.

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PUM

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Abstract

The invention discloses low-silver-content cadmium-free solder and relates to the technical field of soldering. The low-silver-content cadmium-free solder is prepared by proportionally smelting raw materials comprising silver, copper, zinc, manganese and nickel, uniformly stirring, casting, and subjecting a cast ingot to squeezing and drawing so as to obtain a needed solder wire material. The low-silver-content cadmium-free solder comprises, by weight, 24%-26% of the silver, 31.5%-35% of the zinc, 0.8%-2.5% of the manganese, 0.5%-2.0% of the nickel, and the balance copper. By adding small amounts of the nickel and the manganese in the silver solder, wettability and joint strength of the solder can be enhanced, good effects on crystal boundary purification, plasticity improvement and strength enhancement can be achieved, processability of the low-silver-content cadmium-free solder can be improved, and production cost is lowered since silver content is reduced.

Description

technical field [0001] The invention relates to the technical field of welding, in particular to a cadmium-free solder with low silver content. Background technique [0002] Brazing is an important means of stainless steel welding. The traditional brazing silver solder is cadmium-containing solder, which is widely used because of its excellent brazing process performance and technical economy. However, due to the harmful effects of cadmium on human health and adverse effects on environmental pollution, certain restrictions have been placed on the use of cadmium-containing materials internationally. Brazing is an important means of stainless steel welding. The current silver-based solder is mainly based on three alloys of silver, copper and zinc. Since the practical use of cadmium is prohibited, the industry began to look for a substitute for cadmium to achieve seamless welding. Cadmium, to obtain the same performance as traditional cadmium-containing solder, usually needs to...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/40B23K35/302
Inventor 张玉海
Owner JINHUA SANHUAN WELDING MATERIALS
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