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A copper-phosphorus-tin flux-cored welding wire and its preparation method

A technology of flux-cored welding wire and flux core, which is applied in welding equipment, manufacturing tools, welding media, etc., can solve the problems of high-phosphorus copper-phosphorus-tin welding wire, low brazing seam strength, poor flow spreading, etc., and achieve enhanced self-brazing High performance, easy operation and strong applicability

Active Publication Date: 2019-05-07
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

[0007] In order to solve the above technical problems, the present invention provides a copper-phosphorus-tin flux-cored welding wire and a preparation method thereof, which effectively solve the problems of poor flow spreadability and low brazing seam strength during brazing of brass, and overcome the problems of high-phosphorus copper in the traditional preparation technology. Phosphorus-tin welding wire is difficult to process

Method used

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  • A copper-phosphorus-tin flux-cored welding wire and its preparation method
  • A copper-phosphorus-tin flux-cored welding wire and its preparation method
  • A copper-phosphorus-tin flux-cored welding wire and its preparation method

Examples

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Embodiment 1

[0042] A copper-phosphorus-tin flux-cored welding wire. The flux-cored welding wire is formed by rolling and drawing a copper tube with a wall thickness of 2mm and an inner diameter of Φ16mm to cover a flux core, wherein the flux core is calculated according to the mass percentage Composed of the following ingredients: 85% Cu-15P master alloy powder, 0% Ag powder, 5% Sn powder, 10% flux powder, the compaction density of each component in the drug core is between 5.5-5.6, the filling of the drug core The rate is 53%, and the flux powder is composed of K 2 B 4 o 7 ·5H 2 O, H 3 BO 3 and NaF according to the mass ratio of 2:2:1 composition.

[0043] A method for preparing copper-phosphorus-tin flux-cored wire, comprising the following steps:

[0044] Step 1, select a certain length of copper tube with a wall thickness of 2 mm and an inner diameter of Φ16 mm and calculate the quality of the section of copper tube, and then according to the filling rate of the drug core descri...

Embodiment 2

[0051] A copper-phosphorus-tin flux-cored welding wire. The flux-cored welding wire is formed by rolling and drawing a copper tube with a wall thickness of 2mm and an inner diameter of Φ16mm to cover a flux core, wherein the flux core is calculated according to the mass percentage Composed of the following ingredients: 85% Cu-15P master alloy powder, 1% Ag powder, 4% Sn powder, 10% flux powder, the compaction density of each component in the drug core is between 5.5-5.6, the filling of the drug core The rate is 53%, and the flux powder is composed of K 2 B 4 o 7 ·5H 2 O, H 3 BO 3 and NaF according to the mass ratio of 2:2:1 composition.

[0052] The preparation method of embodiment 2 is the same as embodiment 1.

Embodiment 3

[0054] A copper-phosphorus-tin flux-cored welding wire. The flux-cored welding wire is formed by rolling and drawing a copper tube with a wall thickness of 2mm and an inner diameter of Φ16mm to cover a flux core, wherein the flux core is calculated according to the mass percentage It is composed of the following ingredients: 88% Cu-15P master alloy powder, 2% Ag powder, 3% Sn powder, 7% flux powder, the compaction density of each component in the drug core is between 5.5-5.6, the filling of the drug core The rate is 53%, and the flux powder is composed of K 2 B 4 o 7 ·5H 2 O, H 3 BO 3 and NaF according to the mass ratio of 2:2:1 composition.

[0055] The preparation method of embodiment 3 is the same as embodiment 1.

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Abstract

The invention relates to a copper phosphorus tin flux-cored wire and a preparation method of the copper phosphorus tin flux-cored wire. The flux-cored wire is prepared by rolling and drawing after coating a flux core with a copper pipe that is 2mm in wall thickness and 16mm in inner diameter; the flux core comprises the following ingredients by mass percentage: 85-95% of Cu-15P intermediate alloy powder, 0-3.5% of Ag powder, 0-5% of Sn powder and 0.5-11.5% of brazing flux powder; the compacted density of the ingredients in the flux core is 5.5-5.6; and a filling rate of the flux core is 53%. The copper phosphorus tin flux-cored wire effectively solves the problems of flowing laying performance and low brazing seam strength during brass brazing and overcomes the problem that a high phosphorus copper phosphor tin welding wire is difficult to process in the traditional preparation technology.

Description

technical field [0001] The invention relates to the technical field of copper alloy brazing materials, in particular to a copper-phosphorus-tin flux-cored welding wire and a preparation method thereof. Background technique [0002] Copper-phosphorus-tin welding wire is widely used in the brazing of copper and brass pipe fittings in air-conditioning and refrigeration industries due to its low melting point, good brazing process performance, unique self-brazing effect (for brazing copper) and low price. weld. [0003] However, at present, the copper-phosphorus-tin welding wire has deficiencies in the preparation technology and the performance of the welding wire, which seriously limits the application of the copper-phosphorus-tin welding wire. [0004] In terms of preparation technology: when the P element content in copper-phosphorus-tin welding wire is greater than 7.5% (mass%), copper-phosphorus is easy to form a low-melting eutectic with a melting temperature of 714 ° C, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/02B23K35/30B23K35/40
CPCB23K35/0266B23K35/302B23K35/40B23K35/406
Inventor 钟素娟黄俊兰程亚芳高跃进张青科董显吕登峰路全彬周许升董博文
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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