Unlock instant, AI-driven research and patent intelligence for your innovation.

Exothermic welding powder and preparation method thereof

A technology of thermite welding and aluminum powder, which is applied in the direction of aluminotherm welding equipment, welding equipment, welding equipment, etc., can solve the problems of slag inclusion, thermal cracking, pores, etc., and achieve the effect of low price and easy availability

Inactive Publication Date: 2021-03-30
金华三合新材料有限公司
View PDF12 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermite powder in the prior art is prone to defects such as pores, hot cracks, and slag inclusions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0065] Wherein the preparation method of copper oxide:

[0066] (1) Using the copper sheet as the precursor, the copper sheet was ultrasonically cleaned in 0.1mol / L HCl solution for 5 minutes, then rinsed with deionized water, then soaked in acetone solution for 1 minute, and finally deionized Rinse with water.

[0067] (2) Part of the cleaned copper sheet is placed in an alkaline aqueous solution, and a part is exposed to the air. The alkaline aqueous solution contains 1mol / L KOH, 0.1mol / L LiOH and 0.01mol / L KCl. After reacting at room temperature for 5 days , the entire surface of the copper sheet turns black. Take out the copper piece, rinse it with deionized water, and dry it.

[0068] (3) heat-treat the dried copper sheet at 500° C. for 5 hours in an air atmosphere to obtain a copper sheet whose surface is covered with copper oxide.

[0069] Preparation of aluminum powder:

[0070] First, cut the waste aluminum wire into segments, and the length of the segments is gen...

Embodiment 1

[0102] In the present embodiment, the thermite powder comprises the following components by weight: in kg

[0103] Copper oxide: 28kg;

[0104] Aluminum powder: 3kg;

[0105] Copper powder: 3kg;

[0106] Calcium fluoride: 2kg;

[0107] Silica: 1kg;

[0108] Graphene: 1kg.

[0109] Among them, the particle size of copper oxide is 40 mesh, and the oxidation degree of copper oxide is 80%; the particle size of copper powder is 120 mesh, and the purity is 99.9%; the particle size of aluminum powder is 90 mesh, and the purity is 99.8%; The particle size is 50 mesh.

[0110] Put the above components by weight into the mixer, lock the cover of the mixer, and open the button after confirming the lock; the total mass of the above is 39kg, so the mixing time is 20min.

Embodiment 2

[0112] A kind of thermite welding powder in the present embodiment comprises the following components by weight: in kg

[0113] Copper oxide: 45kg;

[0114] Aluminum powder: 5kg;

[0115] Copper powder: 5kg;

[0116] Calcium fluoride: 4kg;

[0117] Silica: 1.8kg;

[0118] Graphene: 5kg.

[0119] Among them, the particle size of copper oxide is 40 mesh, and the oxidation degree of copper oxide is 80%; the particle size of copper powder is 120 mesh, and the purity is 99.9%; the particle size of aluminum powder is 90 mesh, and the purity is 99.8%; The particle size is 50 mesh.

[0120] Put the above components by weight into the mixer, lock the cover of the mixer, and open the button after confirming the lock; the total mass of the above is 67kg, so the mixing time is 40min.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to exothermic welding powder. The exothermic welding powder comprises the following components in parts by weight: 28-80 parts of copper oxide, 3-8 parts of aluminum powder, 2.5-9 parts of copper powder, 2-5 parts of calcium fluoride, 1.5-2 parts of silicon dioxide, and 1-8 parts of graphene. The raw materials are low in price and easy to obtain, and the problems that air holes, slag inclusion, heat cracks and the like are prone to being generated during exothermic welding powder welding are solved.

Description

technical field [0001] The invention belongs to the technical field of welding materials, and in particular relates to a thermite welding powder and a preparation method thereof. Background technique [0002] Thermite welding is a welding method that uses the heat generated by the oxidation-reduction reaction between metal oxide powder and reducing agent aluminum powder to melt the metal base material and fill the joint to realize the joint. Thermite welding is a metallurgical combination permanent connection method. Compared with traditional welding methods, it has the advantages of simple equipment, small investment, easy operation, high efficiency, no power supply, and wide application range. It is especially suitable for field construction. [0003] In recent years, aluminothermic welding has made great achievements in welding powder and welding technology, mainly used for rail welding. With the development of the electric power industry, aluminothermic welding has gradu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/34B23K23/00
CPCB23K35/34B23K23/00
Inventor 方正王恩慧
Owner 金华三合新材料有限公司