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Silver base brazing material and application

A silver-based solder and brazing technology, applied in welding/cutting media/materials, welding media, manufacturing tools, etc., can solve the problems of poor wettability, high melting point, poor connection quality of brazing joints, etc., and achieve production costs. low, the effect of improving the overall performance and improving the wetting ability

Inactive Publication Date: 2019-01-01
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of traditional silver-based solder with high melting point, poor wettability and poor connection quality of brazed joints. Silver-based solder with better performance

Method used

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  • Silver base brazing material and application
  • Silver base brazing material and application
  • Silver base brazing material and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A silver-based solder, which includes the following raw materials in weight percentage: 48% of Ag, 15% of Cu, 17% of Zn, 15% of Cd, 3% of Ni and 2% of Si. The alloy expression of solder is Ag 48 Cu 15 Zn 17 CD 15 Ni 3 Si 2 .

[0025] 1. Using high-frequency composite induction brazing machine to braze stainless steel base metal

[0026] Prepare solder Ag 48 Cu 15 Zn 17 CD 15 Ni 3 Si 2 And stainless steel bar base material. Before brazing, the joint surface of the stainless steel base metal is cleaned with a grinding wheel and a file. The steps of brazing are as follows:

[0027] (1) The brazing material is prepared according to the diameter of the base metal steel rod, which facilitates the brazing process, prevents virtual welding, and is conducive to improving the performance of the brazed joint;

[0028] (2) Fix the parent metal steel bar on the support frame;

[0029] (3) Coat the prepared solder with flux and place it on the connecting surface of th...

Embodiment 2

[0075] A silver-based solder, which includes the following raw materials in weight percentage: 47% of Ag, 16% of Cu, 16% of Zn, 16% of Cd, 2% of Ni and 3% of Si. The alloy expression of solder is Ag 47 Cu 16 Zn 16 Cd 16 Ni 2 Si 3 .

[0076] 1. Using high-frequency composite induction brazing machine to braze stainless steel base metal

[0077] Prepare solder Ag 47 Cu 16 Zn 16 Cd 16 Ni 2 Si 3 And stainless steel bar base material. Before brazing, the joint surface of the stainless steel base metal is cleaned with a grinding wheel and a file. The steps of brazing are as follows:

[0078] (1) The brazing material is prepared according to the diameter of the base metal steel rod, which facilitates the brazing process, prevents virtual welding, and is conducive to improving the performance of the brazed joint;

[0079] (2) Fix the parent metal steel bar on the support frame;

[0080] (3) Coat the prepared solder with flux and place it on the connecting surface of th...

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Abstract

The invention relates to a silver base brazing material and application. The silver base brazing material comprises the following components in percentage by weight: 46-52% of Ag, 13-16% of Cu, 12-20%of Zn, 12-18% of Cd, 1-5% of Ni and 1-8% of Si. The silver base brazing material is applied to brazing of stainless steel and hard alloys, and is reasonable in component design and lower in production cost; through proper amounts of Cd and Ni in the brazing material, the melting point of the brazing material can be effectively lowered, so that the wettability of the silver base brazing material is improved; through adding of a proper amount of Si in the brazing material, grains in a brazing joint structure can be refined; and through a structure formed by a mutual metallurgy effect of base metal and the brazing material after brazing, residual stress in the brazing joint is released, and the comprehensive performance of the brazing joint is improved.

Description

technical field [0001] The invention belongs to the field of brazing, and in particular relates to a silver-based solder and its application. Background technique [0002] Silver-based solder is usually an alloy based on silver or silver-based solid solution. There are many types of silver-based solders. Commonly used silver-based solders basically contain copper. In addition, in order to lower the melting point of silver-based solders and reduce the silver content, other alloying elements are usually added to form multi-element alloys to change the properties of solders. . The melting point of silver-based solder is higher than 450°C. It belongs to brazing. Generally, flux is required to improve the wettability and capillary fluidity of silver-based solder. The use of flux is also beneficial to remove the surface of the base metal. Oil and oxides. The melting temperature of the brazing flux is generally lower than that of the brazing filler metal, which ensures that the ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K103/04B23K103/08
CPCB23K35/3006
Inventor 史光远张济洲黄小婷刘士磊
Owner ZHONGYUAN ENGINEERING COLLEGE