Reed-type environment-friendly coated silver brazing filler metal ring

A kind of silver brazing material, environment-friendly technology, applied in the field of spring-shaped environment-friendly coating silver brazing material ring, can solve the problems that cannot be used to produce non-bar or rod coating solder, damage the health of operators, pollute the environment, etc. , to achieve the effects of shortening melting time, low production cost and simple production process

Active Publication Date: 2015-09-16
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN202804495 U discloses "a brazing material coated with a coating", which is to press-coat the coating onto a brazing rod, but this method can only produce brazing rods with a thick coating and cannot be used for production Non-strip or rod-shaped sheathed solder; Chinese patent CN101190479 A also discloses a kind of "red copper tungsten argon arc welding welding wire with flux sheath layer", which uses acrylic resin adhesive to bond the flux, and then the

Method used

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  • Reed-type environment-friendly coated silver brazing filler metal ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of the spring-shaped environment-friendly type drug-coated silver solder ring of the present invention is as follows:

[0018] a) Mix silver, copper, zinc, and tin according to the ratio of 34:36:27.5:2.5 and melt them, cast them into Φ50 mm rod-shaped solder alloy ingots, cut off the risers and turn the ingots to remove scale ,stand-by;

[0019] b) Raise the temperature of the solder extrusion equipment to 460 °C, place the turned ingot in the muffle furnace for preheating, the preheating temperature is 470 °C, put the preheated ingot into the mold of the extrusion equipment Inside, extruded into a Φ1.7 mm solder wire, and drawn to a Φ0.7 mm silver solder wire;

[0020] c) Clean the drawn silver brazing wire and put it into the material tray of the ring-making equipment, and wind the silver brazing wire into a hollow structure with a middle diameter of Φ4.5 mm and a number of turns of 4 turns. A spring-shaped solder core with a distance (the ax...

Embodiment 2

[0025] The preparation method of the spring-shaped environment-friendly type drug-coated silver solder ring of the present invention is as follows:

[0026] a) Mix silver, copper, zinc, nickel and manganese according to the ratio of 49:16:23:4.5:7.5 and melt them, cast them into Φ50 mm rod-shaped solder alloy ingots, cut off the risers and then cast the ingots Turning to remove scale, set aside;

[0027] b) Raise the temperature of the solder extrusion equipment to 460 °C, place the turned ingot in the muffle furnace for preheating, the preheating temperature is 470 °C, put the preheated ingot into the mold of the extrusion equipment Inside, extruded into Φ2.5 mm solder wire, and drawn to Φ1.0 mm silver solder wire;

[0028] c) Clean the drawn silver brazing wire and put it into the material tray of the ring-making equipment, wind the silver brazing wire into a hollow structure with a middle diameter of Φ8.0mm, the number of turns is 2 turns, and the pitch (The axial distanc...

Embodiment 3

[0033] The preparation steps are the same as in Example 1, and the difference is that the solder composition is silver: copper: zinc=45:30:25; the preheated ingot is put into the die barrel of the extrusion equipment and extruded into Φ2. 0 mm brazing wire, and rolled into oblate silver brazing material with a thickness of 0.9 mm; Silver flux containing 20% ​​sodium fluoride, 35% potassium fluoroborate, 42% boric acid, and 3% elemental boron is placed in a container and water is added to make a viscous saturated flux liquid.

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Abstract

The invention discloses a reed-type environment-friendly coated silver brazing filler metal ring. The reed-type environment-friendly coated silver brazing filler metal ring is composed of at least two circles of reed-type silver brazing filler metal core and a silver brazing flux coating wrapped outside the reed-type silver brazing filler metal core, wherein the reed-type silver brazing filler metal core is formed by winding thin or thin and narrow silver brazing filler metal; the medium diameter of the reed-type silver brazing filler metal core ranges from 2.0 mm to 56.0 mm; silver brazing fluxes comprise at least one of inorganic fluoride, potassium fluotitanate, anhydride, borate and elemental boron; the silver brazing fluxes, the polyvinyl alcohol, the methylcellulose and water are prepared into a brazing flux solution according to a certain proportion, the outer surface of the reed-type silver brazing filler metal core is directly coated with the brazing flux solution, and the finished reed-type environment-friendly coated silver brazing filler metal ring can be obtained after the brazing flux solution is dried. Since the reed-type environment-friendly coated silver brazing filler metal ring does not contain organic bonding agents, the reed-type environment-friendly coated silver brazing filler metal ring meets the ROHS standard, pollution to environment during brazing and burning is greatly reduced, body health of operators is protected, and the labor intensity of the operators in the brazing process is greatly relieved.

Description

technical field [0001] The invention relates to welding materials, in particular to a spring-shaped environment-friendly coating silver solder ring suitable for brazing copper or steel thin-wall pipelines in various industries such as machinery, air conditioning and refrigeration. Background technique [0002] The traditional brazing process of air-conditioning and refrigerator pipelines is manual flame brazing with silk or strip-shaped silver solder. The heating time is longer when welding metals with fast heat conduction such as copper. When brazing, it is necessary to use wire or strip-shaped silver brazing material to coat the flux on the workpiece before heating or pre-heating. The amount of brazing material cannot be guaranteed, and problems such as welding leakage and welding blockage are prone to occur The rework, rework or even scrapping caused the waste of silver solder and raw materials and increased the manufacturing cost. In addition, the pre-soldering operati...

Claims

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Application Information

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IPC IPC(8): B23K35/24B23K35/14B23K35/363B23K35/40
CPCB23K35/0222B23K35/24B23K35/362B23K35/40
Inventor 龙伟民吕登峰董显张雷张青科杨继东齐剑钊程亚芳
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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