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Silver solder for connecting brass and stainless steel

A silver brazing material and stainless steel technology, applied in welding/cutting medium/material, welding medium, welding equipment, etc., can solve the problems of high welding cost, low welding cost and high silver content, and achieve good processing performance and welding cost. Low, low silver content

Inactive Publication Date: 2013-12-04
浙江信和科技股份有限公司
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a lower silver content and lower welding cost for connecting brass and stainless steel for the high silver content of the existing brazing material for welding brass and stainless steel and the high welding cost. Silver solder, which can replace cadmium-free silver solder containing more than 25wt.% silver for the connection of brass and stainless steel

Method used

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  • Silver solder for connecting brass and stainless steel

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Embodiment Construction

[0025] Manufacture of brazing filler metals: according to the ratio of ingredients, the wires and strips of brazing filler metals are manufactured by melting, casting, extrusion, drawing or rolling processes. Among them, the rare earth is smelted into a copper-rare earth master alloy in advance and then proportioned, and the raw materials of other components are pure metals.

[0026] The embodiment of solder of the present invention and the performance comparison with existing BAg20CuZn solder are shown in Table 1. The melting temperature of the solder is measured by a differential thermal analyzer, the heating rate is 15°C / min, and the protective gas is N 2 , using a high-purity alumina crucible.

[0027] Table 1: The embodiment of brazing filler metal of the present invention and the performance comparison with existing silver brazing filler metal

[0028]

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Abstract

The invention relates to the technical field of welding materials, in particular to silver solder for connecting brass and stainless steel. The invention aims at overcoming the defects that existing solder for connecting the brass and the stainless steel is high in silver content and in welding cost, and providing the silver solder for connecting the brass and the stainless steel, wherein the silver solder is low in silver content and in welding cost, and non-cadmium silver solder containing more than 25wt.% of silver can be replaced by the silver solder for connecting the brass and the stainless steel. According to the technical scheme, the silver solder for connecting the brass and the stainless steel comprises components, by weight, 18-22 wt.% of Ag, 30-35wt.% of Zn, 0.3-4.5wt.% of In, 0.3-3.0wt.% of Sn, 0.1-2.5wt.% of Ni, 0.001-0.1wt.% of rare earth, and the balance Cu.

Description

technical field [0001] The invention relates to the technical field of welding materials, in particular to a silver solder for connecting brass and stainless steel. Background technique [0002] The welding structure of brass and stainless steel is widely used in the refrigeration industry. Since the melting point of brass itself is about 900 ° C, brazing filler metals with a melting point that is not much different from brass (such as cadmium-free silver with a silver content of less than 25wt. There is a risk of over-burning when brazing brass, and phosphorus-containing copper-based brazing filler metals are usually not suitable for welding steel. Therefore, the silver content of brazing filler metals for brass and stainless steel is generally above 25wt.%. higher cost. Contents of the invention [0003] The purpose of the present invention is to provide a lower silver content and lower welding cost for connecting brass and stainless steel for the high silver content of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/24
Inventor 张理成刘玉章王阔刘欣龙马剑强郑丽董显陈晓江王雷
Owner 浙江信和科技股份有限公司
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