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Environmentally friendly and pollution-free aluminum brazing wire and its preparation process

A pollution-free, brazing wire technology, used in manufacturing tools, welding equipment, welding media, etc., can solve problems such as restricting the realization of automated processes, high proportion of defective welding, and difficulty in automated welding, so as to protect health and improve production. Efficiency, the effect of reducing work time

Inactive Publication Date: 2016-05-18
河南银升焊接材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) The melting point of aluminum brazing material is around 580°C, which is very close to the melting point of the base metal (630°C), and the rate of defective welding is high. Skilled aluminum welding technicians must be used in actual brazing production, and the production cost is relatively high
[0005] 2) Use corrosive brazing flux, once it enters the pipe, it is easy to cause brazing filler metal corrosion
[0006] 3) Since the brazing flux and solder are separated, it is difficult to realize automatic welding, which directly restricts the realization of batch-scale automatic process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] An environmentally friendly and pollution-free aluminum brazing wire, the welding wire has a melting temperature range of 520-560°C and a diameter of 1.6-4.0mm; it is composed of the following components in mass percentage:

[0037] Potassium fluoride 8%

[0038] Rare earth 10%

[0039] Aluminum 15%

[0040] Silicon 10%

[0041] Bismuth 6%

[0042] The balance is copper.

[0043] A preparation process of an environmentally friendly and pollution-free aluminum brazing wire, comprising the following process steps:

[0044] 1) Prepare the raw materials according to the above ratio, spray powder, mix them, and send them to the smelting furnace for smelting;

[0045] 2) cooling, static pressure forming

[0046] 3) Squeeze

[0047] 4) Drawing

[0048] 5) cut off.

Embodiment 2

[0050] An environmentally friendly and pollution-free aluminum brazing wire, the welding wire has a melting temperature range of 520-560°C and a diameter of 1.6-4.0mm; it is composed of the following components in mass percentage:

[0051] Potassium fluoride 10%

[0052] Rare earth 12%

[0053] Aluminum 20%

[0054] Silicon 8%

[0055] Bismuth 10%

[0056] The balance is copper.

[0057] A preparation process of an environmentally friendly and pollution-free aluminum brazing wire, comprising the following process steps:

[0058] 1) Prepare the raw materials according to the above ratio, spray powder, mix them, and send them to the smelting furnace for smelting;

[0059] 2) cooling, static pressure forming

[0060] 3) Squeeze

[0061] 4) Drawing

[0062] 5) cut off.

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Abstract

The invention discloses an environment-friendly and pollution-free aluminum product brazing wire. The melting temperature of the brazing wire ranges from 520 DEG C to 560 DEG C, and the diameter of the brazing wire ranges from 1.6 mm to 4.0 mm. The brazing wire comprises, by mass, 5%-10% of potassium fluoride, 5%-15% of rare earth, 10%-25% of aluminum, 5%-15% of silicon, 2%-10% of bismuth and the balance of copper. All materials adopted for the aluminum self-fluxing material are environmentally friendly and meet the ROHS standard, so that zero environment pollution is achieved, and accordingly the health of operators is protected; no corrosive material is adopted, so that acid pickling after brazing is omitted, and accordingly the production cost is lowered.

Description

technical field [0001] The invention relates to the technical field of brazing materials, in particular to an environmentally friendly and pollution-free aluminum brazing wire and a preparation process thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection and the increasingly perfect and strict environmental regulations, although tin-lead solder has excellent wettability, solderability, good mechanical properties, low melting point and low price, etc., lead and its compounds are harmful to human beings. Harmful and toxic substances that are harmful to health and pollute the environment. Therefore, lead-free solders are needed to replace traditional tin-lead solders in the electronics industry, especially with the improvement of the weight, miniaturization and miniaturization of electronic products. The requirements are more stringent. Most of the existing lead-free solders are SnAg, SnCu, SnAgCu, and SnCuNi. [0003] T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/0227B23K35/302B23K35/40
Inventor 曹立兵
Owner 河南银升焊接材料有限公司
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