Low-melting-point brazing material

A brazing material and low melting point technology, applied in the field of low melting point brazing material and brazing material, can solve the problems of human health and environmental sanitation threats, single color, limited use range, etc. Low, increased convenience effect

Inactive Publication Date: 2018-06-05
SUZHOU CUBRAZING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel-based solder is pure white, silver-based solder is bronze, and the color is relatively single, and these two solders also have the characteristics of high melting temperature, inconvenient use and high production cost
Although lead-tin alloy solder has low melting point and good fluidity, it contains high content of lead and cadmium, which poses a threat to human health and environmental sanitation, and further limits its scope of use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Weigh tin and zinc according to the ratio of 25 mass % tin and 75 mass % zinc, then smelt it into a low-melting point alloy, and then weigh the following components in parts by weight: 69.55 parts of low-melting point alloy, silver-copper 23 parts of the mixture, 7 parts of Mg, 0.25 parts of silicon and 0.2 parts of aluminum, wherein the silver-copper mixture consists of 28% by mass of silver and 62% by mass of copper;

[0026] 2) Then mix the weighed low-melting point alloy with the silver-copper mixture to obtain a mixed material, put the mixed material in a crucible, and smelt it at 1150°C to completely melt the mixed material, then cool it to 53°C, and then keep it warm for 45 minutes ;

[0027] 3) Add Mg to the completely melted mixed material, and continue melting under the protective atmosphere of argon. When a uniform liquid phase is obtained, add the weighed silicon and aluminum to continue melting. After it is fully melted, cast to form Long cast ingots, t...

Embodiment 2

[0032] 1) Weigh tin and zinc according to the ratio of 20 mass % tin and 80 mass % zinc, then smelt it into a low-melting point alloy, and then weigh the following components in parts by weight: 65 parts of low-melting point alloy, silver-copper 25.55 parts of the mixture, 9 parts of Mg, 0.25 parts of silicon and 0.2 parts of aluminum, wherein the silver-copper mixture consists of 28% by mass of silver and 62% by mass of copper;

[0033] 2) Then mix the weighed low-melting point alloy with the silver-copper mixture to obtain a mixed material, put the mixed material in a crucible, and smelt it at 1150°C to completely melt the mixed material, then cool it to 53°C, and then keep it warm for 45 minutes ;

[0034] 3) Add Mg to the completely melted mixed material, and continue melting under the protective atmosphere of argon. When a uniform liquid phase is obtained, add the weighed silicon and aluminum to continue melting. After it is fully melted, cast to form Long cast ingots, t...

Embodiment 3

[0039] 1) Weigh tin and zinc according to the ratio of 30 mass % tin and 70 mass % zinc, then smelt it into a low-melting point alloy, and then weigh the following components in parts by weight: 70 parts of low-melting point alloy, silver-copper 22 parts of the mixture, 7.55 parts of Mg, 0.25 parts of silicon and 0.2 parts of aluminum, wherein the silver-copper mixture consists of 28% by mass of silver and 62% by mass of copper;

[0040] 2) Then mix the weighed low-melting point alloy with the silver-copper mixture to obtain a mixed material, put the mixed material in a crucible, and smelt it at 1150 ° C to completely melt the mixed material, then cool it to 53 ° C, and then keep it warm for 45 minutes ;

[0041] 3) Add Mg to the completely melted mixed material, and continue melting under the argon protective atmosphere. When a uniform liquid phase is obtained, add the weighed silicon and aluminum to continue melting. After it is fully melted, cast to form Long cast ingots, ...

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Abstract

The invention discloses a low-melting-point brazing material which is prepared from the compositions, by weight, of 60-80 parts of low-melting-point alloy, 20-50 parts of silver-copper mixture, 6-9 parts of Mg, 0.25-0.45 part of silicon and 0.1-0.3 part of aluminum. The low-melting-point brazing material has the advantages that the low-melting-point alloy and the silver-copper mixture are used, and the low-melting-point brazing material with good moist performance is obtained; because the Mg is added, the melting point can be further reduced, the activity of the brazing material can be increased, and the interface reaction uniformity is improved; metallic bonding with higher interface connection strength can be obtained by controlling the low-melting-point alloy, the proportion of the silver-copper mixture and combination of other moderate matters, the brazing strength is effectively improved, and the use requirement is met; the colors and luster of the brazing material are more diverse and adjustable by the added silicon and aluminum, the compositions of the brazing material can be adjusted according to a brazed part so that the colors of the brazing material and the brazed part are kept consistent, and the use convenience is increased.

Description

technical field [0001] The invention relates to a brazing material, in particular to a low melting point brazing material, which belongs to the technical field of welding materials. Background technique [0002] Brazing is to use a metal material with a lower melting point than the base metal as the solder, heat the weldment and the solder to a temperature higher than the melting point of the solder and lower than the melting temperature of the base metal, use liquid solder to wet the base metal, fill the gap between the joints and The method of interdiffusion with the base metal to realize the connection of the weldment. The brazing deformation is small, the joint is smooth and beautiful, and it is suitable for welding precision, complex and components composed of different materials. With the development of society and the improvement of people's living standards, people have higher requirements for the appearance design, surface quality and material performance of lighti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
Inventor 莫文剑
Owner SUZHOU CUBRAZING MATERIALS CO LTD
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