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Exothermic welding powder

A technology of exothermic welding and composite powder, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem of insufficient fluidity of molten metal, and achieve accelerated replacement reaction rate, stable weldment quality, and surface finish. smooth effect

Active Publication Date: 2018-02-09
JIAXING JIAHE ELECTRIC POWER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above problems and provide a kind of exothermic solder powder to solve the problem of insufficient fluidity of molten metal during welding of exothermic solder powder in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of exothermic solder powder, described solder powder comprises alloy powder and composite powder particle, and the weight ratio of alloy powder and composite powder particle is 1.5:1;

[0023] The alloy powder is composed of the following components by weight percentage: copper 49%, aluminum 47.2%, calcium 1.2%, tin 1.2%, iron 0.6%, carbon 0.3%, rare earth 0.3%, silver 0.2%;

[0024] The composite powder particles include, in parts by weight: 12 parts of aluminum powder, 24 parts of copper oxide powder, 3 parts of slagging agent and 3 parts of binder. The slagging agent is fluorite powder, and the binder is an organic binder; the oxidation rate of copper oxide powder is 80-90%.

[0025] The hardness of the welding layer is 176HB, and the tensile strength is 25.5KN.

Embodiment 2

[0027] A kind of exothermic solder powder, described solder powder comprises alloy powder and composite powder particle, and the weight ratio of alloy powder and composite powder particle is 5:1;

[0028] The alloy powder is composed of the following components by weight percentage: copper 49.8%, aluminum 48%, calcium 0.8%, tin 0.8%, iron 0.4%, carbon 0.1%, rare earth 0.1%, silver 0;

[0029] The composite powder particles include, in parts by weight: 16 parts of aluminum powder, 18 parts of copper oxide powder, 5 parts of slagging agent and 1 part of binder. The slagging agent is fluorite powder, and the binder is an organic binder; the oxidation rate of copper oxide powder is 80-90%.

[0030] The hardness of the welding layer is 193HB, and the tensile strength is 25.9KN

Embodiment 3

[0032] An exothermic solder powder, the solder powder includes alloy powder and composite powder particles, the weight ratio of alloy powder and composite powder particles is 4:1; the alloy powder is composed of the following components in weight percentage: copper 49.5% , aluminum 47.5%, calcium 1%, tin 1%, iron 0.5%, carbon 0.2%, rare earth 0.2%, silver 0.1%. The composite powder particles are composed of the following materials in parts by weight: 13 parts of aluminum powder, 8 parts of copper oxide powder, 4 parts of slagging agent and 2 parts of binder. The slagging agent is fluorite powder. The oxidation rate of copper oxide powder is 80-90%.

[0033] The hardness of the welding layer is 205HB, and the tensile strength is 26.2KN.

[0034] After the comparison of Examples 1, 2, and 3, the more the composite powder particles are added, the better the fluidity can be improved. However, the more the slag discharge rate is increased, the welding quality will be reduced afte...

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Abstract

The invention relates to the technical field of welding powder of welding materials, in particular to exothermic welding powder. The welding powder comprises alloy powder and composite powder particles, wherein the alloy powder comprises, by weight, 49-50% of copper, 47-48% of aluminum, 0.8-1.2% of calcium, 0.8-1.2% of tin, 0.4-0.6% of iron, 0.1-0.3% of carbon, 0.1-0.3% of rare earth and 0-0.2% ofsilver, and the composite powder particles comprises, by weight, 12-16 parts of aluminum powder, 18-24 parts of copper oxide powder and 3-5 parts of slag-making agents. According to the exothermic welding powder, the composite powder particles are added into the alloy powder, by triggering the chemical reaction in the composite powder particles, a lot of heat are released, the fluidity of moltenmetal is greatly increased, the replacement reaction rate of the exothermic welding powder is speeded up, meanwhile, mixing of raw materials is more even, after cooling, the connection strength is good, the surface is smooth, and the welding part quality is stable.

Description

technical field [0001] The invention relates to the technical field of welding powder for welding materials, in particular to an exothermic welding powder. Background technique [0002] Exothermic solder powder is a new type of welding material. Its principle is to use metal oxides to undergo a displacement reaction with a reducing agent at high temperature to replace the metal to generate superheated molten metal, and once the reaction occurs, it can continue by itself. Under the package of hot-melt abrasives, the metals to be welded can be fused together to achieve molecular level bonding and seamless welding, with excellent strength and electrical conductivity. The fluidity of the molten metal during the melting process is the key to achieving seamless welding. In order to increase the proportion of metal copper, the traditional solder powder is added to the copper powder, and then when the copper powder is added, it is easy to reduce the fluidity of the hot-melt technolo...

Claims

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Application Information

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IPC IPC(8): B23K35/30
CPCB23K35/302
Inventor 胡海峰胡连锋
Owner JIAXING JIAHE ELECTRIC POWER EQUIP
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