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A kind of nano-magnetic metal composite solder paste and preparation method thereof

A nano-magnetic and metal composite technology, which is applied in metal processing equipment, welding equipment, manufacturing tools, etc., can solve problems such as large mechanical load, brazing seam does not have mechanical properties, and limits the use range of copper-phosphorus solder.

Active Publication Date: 2020-11-24
HANGZHOU HUAGUANG ADVANCED WELDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because Cu3P in copper-phosphorus solder is a brittle phase, the brazed joint of copper-phosphorus solder does not have good mechanical properties, which leads to the fact that the welded parts cannot bear large mechanical loads
At the same time, when copper-phosphorus solder is used to weld ferrous metals, the P element on the contact surface between the solder and the base metal will form a brittle compound at the interface with the base metal, resulting in the inability to form an effective connection between the solder and the base metal. The above factors are all limited The scope of use of copper-phosphorus solder

Method used

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  • A kind of nano-magnetic metal composite solder paste and preparation method thereof
  • A kind of nano-magnetic metal composite solder paste and preparation method thereof
  • A kind of nano-magnetic metal composite solder paste and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Prepare raw materials according to the following components;

[0027]

[0028] (2) Prepare the raw material of brazing filler metal according to the set ratio and melt it;

[0029] (3) The solder alloy is prepared into powder by gas atomization or water atomization method, and the alloy powder is passed through a 200-mesh sieve;

[0030] (4) Add the sieved alloy powder and the purchased Fe nanowires into the mixer in proportion and mix them evenly;

[0031] (5) Add the brazing flux to the solvent (deionized water) and stir evenly, then add hydroxyethyl starch, methyl acrylate, glycerin, stearic acid, and acetylene glycol to the solution in proportion and order to form a mixed Paste with flux;

[0032] (6) Add the magnetic metal composite solder into the paste mixed with flux and stir evenly to prepare copper solder paste.

[0033] The copper solder paste prepared according to Example 1 is mainly used for welding hard alloy steel, and has less residue on the su...

Embodiment 2

[0035] (1) Prepare raw materials according to the following components;

[0036]

[0037] (2) Prepare the raw material of brazing filler metal according to the set ratio and melt it;

[0038] (3) The solder alloy is prepared into powder by gas atomization or water atomization method, and the alloy powder is passed through a 200-mesh sieve;

[0039] (4) Add the sieved alloy powder and the purchased flaky Fe nano powder into the mixer in proportion and mix evenly;

[0040] (5) Add the brazing flux to the solvent ethylene glycol and stir evenly, then add hydroxyethyl cellulose, methyl acrylate, glycerin, stearic acid, polyisobutylene, and mineral oil to the solution in proportion and order to form A paste mixed with flux;

[0041] (6) Add the magnetic metal composite solder into the paste mixed with flux and stir evenly to prepare copper solder paste.

[0042] Welding tests were performed on the copper solder paste prepared in Example 2, and it was found that the solder pas...

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Abstract

The invention relates to nanoscale magnetic metal composite welding paste and a preparation method thereof. The nanoscale magnetic metal composite welding paste is composed of, by mass, 60-90% of brazing filler metal, 2-10% of brazing flux, 10-30% of a paste former and 0.1-5% of nanoscale magnetic metal powder. The nanoscale magnetic metal composite welding paste achieves the effects of grain refining, dispersion strengthening and activation of the brazing filler metal. By adding the outer magnetic field after the brazing filler metal is molten, nanoscale magnetic materials can be arranged inthe stress direction of weld joints, and the load bearing capacity of the brazing filler metal is improved. Under the condition that ferromagnetic metal or paramagnetic serves as base metal, the basemetal is magnetized under the action of the magnetic field, the nanoscale magnetic metal powder forms a comb-shaped structure on the surface of the base metal, P elements in the brazing filler metal and brittle compounds formed on the surface of the base metal are reduced, an effective interface is formed, and the welding paste can be used for inter-ferrous-metal welding.

Description

technical field [0001] The application relates to a nano-magnetic metal composite solder paste and a preparation method thereof, which are mainly suitable for metal welding. Background technique [0002] In the brazing industry, the traditional copper-phosphorus solder is widely used for welding between copper and copper alloys because of its low cost, low melting temperature, and good spread on copper and copper alloys. However, because Cu3P in copper-phosphorus solder is a brittle phase, the brazing joint of copper-phosphorus solder does not have good mechanical properties, which leads to the fact that the welded parts cannot bear large mechanical loads. At the same time, when copper-phosphorus solder is used to weld ferrous metals, the P element on the contact surface between the solder and the base metal will form a brittle compound at the interface with the base metal, resulting in the inability to form an effective connection between the solder and the base metal. The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/302B23K35/40
Inventor 黄世盛龙海飞施宝珠
Owner HANGZHOU HUAGUANG ADVANCED WELDING MATERIALS CO LTD