Hot melt welding agent

A heat fusion welding, mass percentage technology, applied in the direction of aluminothermic welding equipment, welding medium, welding equipment, etc., can solve the problems of insufficient mechanical strength and electrical conductivity, inability to fully weld metals, and inability to achieve intermetallic molecular bonding, etc. , to achieve good mechanical properties, ensure welding quality, and large current load capacity

Inactive Publication Date: 2009-07-29
ZHEJIANG HUADIAN LIGHTENING PROTECTION TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved and the technical task proposed by the present invention are to overcome the defects in the prior art that the metals cannot be fully welded, the intermetallic molecular bonding cannot be achieved, and the mechanical strength and electrical conductivity are not ideal, and to provide a new thermal Welding flux, to use the chemical reaction between metal compounds to generate high temperature to melt the metal, so as to promote the permanent joint of the welding part to form a specific shape through the mold, to ensure that the size meets the process requirements, so that the fusion between the metals can achieve molecular bonding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Mix 6kg of copper oxide powder of 60-80 mesh with 0.5kg of powdered iron oxide of 50-65 mesh, 0.5kg of aluminum, 1.5kg of magnesium, 0.75kg of copper, 0.25kg of iron, and 0.5kg of phosphorus, and take a small amount for welding copper clad Steel components (that is, components covered with a copper layer on the surface of the steel): place two copper-clad steel components in an investment mold (the investment mold is a mold that is used to constrain the geometric specifications and surface quality of the formed joints, and the welding flux The above-mentioned flux is filled between the two joints, and the flux is ignited with a spray gun, that is, the aluminothermic reaction occurs, and the heat is released to generate a high temperature of 2200-3000°C, which melts the metal of the component and realizes two in the investment mold. Component welding. After welding, the joints form a regular geometry, and after inspection:

[0019] Due to the constraints of the investme...

Embodiment 2

[0026] Mix 5.8kg of 40-60 mesh copper oxide powder with 30-75 mesh powdered iron oxide 0.5kg, aluminum 0.5kg, magnesium 1.8kg, copper 0.75kg, iron 0.25kg, phosphorus 0.5kg, and take a small amount for welding Aluminum and copper: put the two components opposite to each other in the investment mold, fill the above-mentioned flux between the two joints, ignite the flux with a spray gun, that is, the aluminothermic reaction occurs, and the heat is released to generate a high temperature of 2000 ° C to melt the metal of the component. The welding of two components is realized in the investment mold. After welding, the joints form a regular geometry, and after inspection:

[0027] Due to the constraints of the investment pattern, there is no crack on the surface, and the dimensional and shape tolerances of the joints are less than 2mm, which meets the requirements of the national standard;

[0028] There is no air bubble crack in the X-ray internal photography, the tensile strengt...

Embodiment 3

[0034] Mix 6.2kg of copper oxide powder of 80-100 mesh with 0.5kg of powdered iron oxide below 40 mesh, 0.5kg of aluminum, 1.4kg of magnesium, 0.75kg of copper, 0.25kg of iron, and 0.5kg of phosphorus, and take a small amount for welding steel : Place two copper components in the investment mold, fill the flux between the two joints, ignite the flux with a spray gun, and then the aluminothermic reaction will occur, releasing heat to generate a high temperature of 2500-3400 ° C, melting the metal of the component. The welding of two components is realized in the investment mold. After welding, the joints form a regular geometry, and after inspection:

[0035] Due to the constraints of the investment pattern, there is no crack on the surface, and the dimensional and shape tolerances of the joints are less than 2mm, which meets the requirements of the national standard;

[0036] There is no bubble crack in the X-ray internal photography, the tensile strength of the joint reaches...

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Abstract

Hot-melt solder belongs to a composition. The prior art cannot fully weld metals, fail to achieve intermetallic molecular bonding, and the mechanical strength and electrical conductivity are not ideal. The present invention is composed of the following powdery components and corresponding mass percentages: Composition: copper oxide 58%~62%, iron oxide 4%~6%, aluminum 4%~6%, magnesium 14%~16%, copper 6%~8%, iron 1%~3%, phosphorus 4%~ 6%. The invention can be used for welding between pure copper, brass, bronze, red copper, copper-clad steel, pure iron, stainless steel, wrought iron, galvanized steel, cast iron, etc. Good performance, stable impact resistance, strong corrosion resistance, simple and safe connection, different reaction temperatures can be configured according to the metal characteristics of the conductor to be welded, so that the welded joint is stronger and more perfect.

Description

technical field [0001] The invention belongs to a composition, specifically a kind of hot-melt flux that undergoes thermite reaction, uses chemical exothermic heat to generate high temperature, and realizes component welding through investment patterns. Background technique [0002] The current exothermic flux is mixed with ordinary chemical materials, the ratio of raw materials is unscientific, and the heat generated cannot reach the standard of completely melting metals, so that the welding between metals cannot meet the technical requirements (GB / T 3323-2005 Radiography of metal fusion welding joints, GB / T14693-1993 Non-destructive testing of welds, GB / T 19804-2005 General size and shape tolerances of welded structures, QJ3116-1999 X-ray photography of internal defects of metal fusion welding, HB5363-1995 welding process quality control, JB / T7716-1995 welded joint four-point bending fatigue test and other national standards have specified technical requirements), not only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362B23K23/00
Inventor 黄丽丽黄必臻
Owner ZHEJIANG HUADIAN LIGHTENING PROTECTION TECHCO
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