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High-tin-content copper-tin brazing filler metal grid-shaped composite strip and preparation method thereof

A composite strip and content technology, applied in welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of difficult to process and form, tin is easily extruded, and the amount of tin added is reduced. The effect of increased melting temperature

Active Publication Date: 2022-01-18
ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the content of tin is high, it is not easy to form
In the rolling process of copper-tin multi-layer composite strip, tin is easy to be squeezed out, resulting in a decrease in the effective amount of tin added, and in the brazing heating process, the tin in the middle layer first melts into liquid, which is easy to be broken due to force. Extruded from the weld seam, resulting in a decrease in the tin content of the copper-tin solder, resulting in an increase in the melting temperature and brazing heating temperature

Method used

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  • High-tin-content copper-tin brazing filler metal grid-shaped composite strip and preparation method thereof
  • High-tin-content copper-tin brazing filler metal grid-shaped composite strip and preparation method thereof
  • High-tin-content copper-tin brazing filler metal grid-shaped composite strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] refer to figure 1 , a high tin content copper-tin solder grid-shaped composite strip, the tin content of which is 10-60wt%, comprising: a strip-shaped copper substrate, wherein one side of the strip-shaped copper substrate has a plurality of grooves arranged in parallel and at intervals, The groove is filled with tin to form a tin strip, and the tin strip is integrated with the copper around the groove; at least one end of the tin strip is flush with one end of the strip-shaped copper substrate; the groove is arranged along the long side of the strip-shaped copper substrate ; The number of grooves is at least two.

Embodiment 2

[0027] A method for preparing a grid-shaped composite strip of copper-tin solder with high tin content, comprising the steps of:

[0028] refer to figure 2 , take a piece of pure copper plate 80mm wide x 600mm long x 10mm thick, along the direction parallel to the long side of the pure copper plate, open 5 grooves arranged in parallel at intervals in the center of the pure copper plate, and keep any end of the groove in line with any end of the copper plate There is a certain distance at one end, the size of each groove is 5mm wide x 400mm long, 5mm deep, and the distance between two adjacent grooves is 5mm;

[0029] Place 5 strips of pure tin in the groove, then melt the tin strips by flame brazing method, cool and solidify, connect with the copper plate to form a whole, and completely fill the groove (this can prevent other impurities from entering the groove), Make the tin content 20wt%, then use two-high rolling mill and four-high rolling mill for rolling, then use edge ...

Embodiment 3

[0033] refer to figure 2 , take a piece of pure copper plate 80mm wide x 600mm long x 10mm thick, along the direction parallel to the long side of the pure copper plate, open 5 grooves arranged in parallel at intervals in the center of the pure copper plate, and keep any end of the groove in line with any end of the copper plate There is a certain distance at one end, the size of each groove is 5mm wide x 400mm long, 2.5mm deep, and the distance between two adjacent grooves is 5mm;

[0034] Place 5 strips of pure tin in the groove, then melt the tin strips by flame brazing, connect with the copper plate after cooling and solidification to form a whole, and completely fill the groove so that the tin content is 10wt%, and then use a two-roll mill Rolling with a four-roll mill, and then using an edge trimmer to remove the pure copper matrix at both sides and both ends and trim the strip to finally obtain a copper-tin brazing grid-shaped composite strip with a width of 50mm and a...

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Abstract

The invention discloses a high-tin-content copper-tin brazing filler metal grid-shaped composite strip. The tin content is 10wt%-60wt%; the high-tin-content copper-tin brazing filler metal grid-shaped composite strip comprises a strip-shaped copper base body, a plurality of grooves which are arranged in parallel at intervals are formed in one surface of the strip-shaped copper base body, the grooves are filled with tin to form tin bars, and the tin bars and copper around the grooves are connected into a whole. The invention further discloses a preparation method of the high-tin-content copper-tin brazing filler metal grid-shaped composite strip. According to the method, the influence of the tin adding amount on the machining forming performance can be avoided, when the tin content reaches 10wt%-60wt%, the high-tin-content copper-tin brazing filler metal strip can still be obtained through a conventional pressure machining method, and the brazing temperature is reduced.

Description

technical field [0001] The invention relates to the technical field of brazing, in particular to a grid-shaped composite strip of copper-tin solder with high tin content and a preparation method thereof. Background technique [0002] When brazing carbon steel and stainless steel, pure copper is the most cost-effective brazing filler metal; especially when brazing continuously in reducing atmosphere, using pure copper brazing filler metal not only has high production efficiency, high joint strength and good welding effect , and the price of pure copper solder is cheap, only 2-5% of the price of silver solder. However, the brazing temperature of pure copper brazing material is high, generally above 1100°C. On the one hand, the performance of carbon steel and stainless steel base materials is reduced, and on the other hand, the heat loss is large, which is not energy-saving and environmentally friendly. [0003] Adding low melting point element tin (melting point is 231.89°C) ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/14B23K35/40
CPCB23K35/0222B23K35/40
Inventor 石磊杨学顺韩勇陈凯祝道波
Owner ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL
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