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High-efficiency coated solder with strong adhesion

A technology with strong adhesion and brazing material, applied in the direction of manufacturing tools, welding/cutting media/materials, welding media, etc., can solve the problems of increased process and operation time, long heating time, and easy-to-corrosion joints, etc., to facilitate transportation and storage , the connector is precise and bright, and the effect of reducing environmental pollution

Active Publication Date: 2017-11-28
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

[0002]The traditional brazing process is manual flame brazing with wire or strip solder. Flame brazing has high temperature and fast heating, but it is prone to uneven heating , overburning and other problems, and the heating time is longer when brazing metals with fast heat conduction
When brazing, wire or strip solder is used to apply the flux to the workpiece before heating or pre-heating. The amount of solder can not be guaranteed, and problems such as solder leakage and solder blockage are prone to occur, and subsequent rework , rework or even scrapping will cause waste of solder and raw materials and increase manufacturing costs
In addition, the process of brazing flux or pre-coating flux adds a pre-soldering operation, increases the process and operation time, and adds another variable in the brazing process, affecting the consistency and stability of the welded joint quality
Moreover, this kind of brazing process is complicated and the production efficiency is low. Because it is difficult to accurately control the amount of flux, excessive or uneven addition of flux often occurs, resulting in waste of flux, and the flux residue remaining on the joint surface is difficult to clean. , corrosion-prone joints
[0003] Chinese patent CN202804495 U discloses "a brazing material coated with a coating", which is to press-coat the coating onto a brazing rod; the signed article "Development of a coating brass brazing material" introduces The coating is to mix the organic adhesive and flux first, and then press-coat the flux with the binder onto the surface of the brass brass; these pressure-coating methods can only produce brazing with thick coating Rods cannot be used to produce non-strip or rod-shaped sheathed solder

Method used

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  • High-efficiency coated solder with strong adhesion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of the high-efficiency sheath solder with strong adhesion of the present invention is:

[0024] 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;

[0025] 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 brazing wire, and drawn to a Φ0.7 mm brazing wire;

[0026] c) Clean the drawn silver brazing wire and put it into the material tray of the ring-making equipment, wind the brazing wire into a diameter of Φ4.5 mm, the number of turns is 4 turns, and the pitch (two adjacent The axial distance of the corresponding point of the ring on the middle diameter) is a spring-shaped so...

Embodiment 2

[0031] The preparation method of the high-efficiency sheath solder with strong adhesion of the present invention is:

[0032] a) Mix silver, copper, zinc, nickel, and manganese according to the ratio of 49:16:23:4.5:7.5 and melt them, and cast them into Φ50mm rod-shaped solder alloy ingots, cut off the risers and turn the ingots Remove scale for use;

[0033] 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 brazing wire, and drawn to Φ1.0 mm brazing wire;

[0034] c) Clean the drawn silver solder wire and put it into the material tray of the ring-making equipment, and wind the solder wire to make a ring-shaped solder core 1 with a middle diameter of Φ8.0 mm;

[0035] d), e) steps are the same as in Example 1.

Embodiment 3

[0037] The preparation method of the high-efficiency sheath solder with strong adhesion of the present invention is:

[0038] a) Mix Cu, Cu-P master alloy and rare earth in proportion and melt them, cast them into Φ50 mm rod-shaped BCu93P7 solder alloy ingots, cut off the risers and turn the ingots to remove scale for later use;

[0039] b) Raise the temperature of the solder extrusion equipment to 450 °C, place the ingot after turning to remove scale in the muffle furnace for preheating, the preheating temperature is 460 °C, put the preheated ingot into the extrusion equipment In the mold barrel, extrude into Φ2.2 mm solder wire, and draw it to Φ2.0 mm silver solder wire;

[0040] c) After the drawn copper-phosphorus-tin solder wire is subjected to frictional texture treatment, it is then cleaned with dilute acid and passivated. After cleaning, it is put into a straightening and cutting machine and cut into 50 mm long solder strips inner core 1;

[0041] d) Weigh phosphoric...

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Abstract

The invention discloses a high-efficiency coating brazing filler metal with strong adhesive force. The high-efficiency coating brazing filler metal with strong adhesive force comprises a brazing filler metal inner core and a coating coated outside the brazing filler metal inner core, and the coating is composed of a binding material smeared on the outer surface of the brazing filler metal inner core and brazing flux skin adhering to the binding material. In preparation, the brazing filler metal inner core is prepared according to conventional methods, and the outer surface of the inner core is coated with a layer of the inorganic binding material; the binding material is uniformly coated with the prepared powdered brazing flux, the brazing flux skin is formed after drying, and then a high-efficiency coating brazing filler metal finished product is obtained. The high-efficiency coating brazing filler metal with strong adhesive force has the advantages that the processing technology is simple, the production cost is low, the convenient, fast, quantitative and high efficient adding of the brazing flux is achieved, a coating brazing filler metal with a thin coating or a coating brazing filler metal in a thin wire shape, a ring shape or a multi-ring spiral ring shape can be prepared, the adhesive force of the brazing flux is strong, and therefore the transportation and the storage are facilitated. In brazing, no additional brazing flux is needed to be added, the production efficiency is high, the use amount of the brazing flux is reduced, the welding connecting joint of welding is precise and bright, the quality is stable, the labor intensity in the brazing process is relieved, and the environment pollution is reduced.

Description

technical field [0001] The invention relates to welding materials, in particular to a high-efficiency sheathed brazing material with strong adhesion and suitable for flame brazing, high-frequency brazing and furnace brazing. Background technique [0002] The traditional brazing process is the manual flame brazing of wire or strip solder. The flame brazing temperature is high and the heating is fast, but it is prone to problems such as uneven heating and overburning, and it is heated when brazing metals with fast heat conduction. A long time. When brazing, wire or strip solder is used to apply the flux to the workpiece before heating or pre-heating. The amount of solder can not be guaranteed, and problems such as solder leakage and solder blockage are prone to occur, and subsequent rework , Repair or even scrapping will cause waste of solder and raw materials and increase manufacturing costs. In addition, the process of brazing flux or pre-coating flux adds a pre-soldering ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/14B23K35/30B23K35/40
CPCB23K35/0266B23K35/302B23K35/404
Inventor 龙伟民吕登峰马佳孙华为周许升蒋胜宇路全彬轩庆庆
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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