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A kind of solder for copper/aluminum alloy brazing and preparation method thereof

A technology of aluminum alloy and brazing filler metal, applied in welding equipment, metal processing equipment, welding/cutting medium/material, etc., can solve the problems of poor brazing property, lower melting point, etc., so as to improve the wettability and shorten the wetting time. Effect

Inactive Publication Date: 2018-06-15
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of high melting point, wettability, and poor plasticity and toughness in existing Zn-Al brazing filler metals for aluminum / copper brazing, the invention provides a kind of brazing filler metal for copper / aluminum alloys and a preparation method thereof, The solder for brazing has better wettability and mechanical properties, and the melting point is also lowered, which can well solve the problem of poor brazing between copper and aluminum alloys

Method used

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  • A kind of solder for copper/aluminum alloy brazing and preparation method thereof
  • A kind of solder for copper/aluminum alloy brazing and preparation method thereof
  • A kind of solder for copper/aluminum alloy brazing and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] According to the ratio of 81.5% of Zn, 10% of Al, 5% of Cu and 3% of Sn, select elemental Zn, Al, Cu, and Sn to form the base material, and then weigh Sb according to the ratio of 0.5%. Weigh 5g of NaCl and KCl (ratio 1:1); preheat the vacuum heating furnace without vacuuming, set the temperature at 800°C, and make it warm up slowly; In the crucible, NaCl and KCl are covered on it, and 10 g of broken glass is added on top of NaCl and KCl at the same time.

[0058] When the furnace temperature rises to about 450°C, put the crucible containing Zn, Al, NaCl, KCl and cullet into the vacuum furnace for heating to melt it. When the furnace temperature reaches 700°C, open the furnace door and clamp the crucible To the door of the furnace, quickly pour the weighed trace elements Cu, Sb and Sn into the crucible with Zn and Al, stir continuously, and then put it into the heating furnace for re-melting to ensure the uniformity of the developed alloy solder composition. .

[0059...

Embodiment 2

[0061] Select elemental Zn, Al, Cu, and Sn according to the ratio of 80.5-82% Zn, 10% Al, 5% Cu and 3% Sn to form the base material, then weigh Sb according to the ratio of 1.0%, and at the same time Need to weigh 5g of NaCl and KCl (ratio 1:1); preheat the vacuum heating furnace without vacuuming, set the temperature at 800°C, and make it warm up slowly; mix the above-mentioned raw material zinc particles and aluminum flakes according to the composition ratio Place in a crucible, cover with NaCl and KCl, and add 15 g of cullet on top of NaCl and KCl.

[0062] When the furnace temperature rises to about 450°C, put the crucible containing Zn, Al, NaCl, KCl and cullet into the vacuum furnace for heating to melt it. When the furnace temperature reaches 700°C, open the furnace door and clamp the crucible To the door of the furnace, quickly pour the weighed trace elements Cu, Sb and Sn into the crucible with Zn and Al, stir continuously, and then put it into the heating furnace for...

Embodiment 3

[0065] Select elemental Zn, Al, Cu, and Sn according to the ratio of 80.5-82% Zn, 10% Al, 5% Cu and 3% Sn to form the base material, then weigh Sb according to the ratio of 1.5%, and at the same time Need to weigh 5g of NaCl and KCl (ratio 1:1); preheat the vacuum heating furnace without vacuuming, set the temperature at 800°C, and make it warm up slowly; mix the above-mentioned raw material zinc particles and aluminum flakes according to the composition ratio Place in a crucible, cover with NaCl and KCl, and add 12.5 g of cullet on top of NaCl and KCl.

[0066] When the furnace temperature rises to about 450°C, put the crucible containing Zn, Al, NaCl, KCl and cullet into the vacuum furnace for heating to melt it. When the furnace temperature reaches 700°C, open the furnace door and clamp the crucible To the door of the furnace, quickly pour the weighed trace elements Cu, Sb and Sn into the crucible with Zn and Al, stir continuously, and then put it into the heating furnace f...

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Abstract

The invention discloses a brazing filler metal for copper / aluminum alloy brazing and a preparation method thereof. The brazing filler metal is prepared from a base material and an additive ingredient. The base material is composed of, by weight, 80.5-82% of Zn, 10-12% of Al, 4-6% of Cu and 2-4% of Sn, and the additive ingredient is 0.5-1.5% of Sb. The wettability and mechanical property of the obtained product are better than those of existing common brazing filler metal, the melting point of the brazing filler metal is lowered, good copper / aluminum alloy brazing joints are obtained through a brazing test, and the problem of poor brazing performance between aluminum alloy and copper can be solved.

Description

technical field [0001] The invention relates to the technical field of dissimilar brazing material-medium-high temperature brazing filler metal, in particular to a brazing filler metal for copper / aluminum alloy brazing and a preparation method thereof. Background technique [0002] Copper and aluminum are widely used in fields such as electric transmission, heat exchange, and daily necessities. However, with the shortage of copper resources and relatively high cost, scientific and technological workers began to adopt the "substituting aluminum for copper" technology to reduce production costs. This is because the cost and density of aluminum is only 1 / 3 of that of copper, and the material cost of aluminum components is 1 / 9 of that of copper components, and it has excellent electrical conductivity, thermal conductivity, corrosion resistance and processing performance, regardless of mechanics, electric heat Under performance conditions, aluminum can also meet the performance r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/28
CPCB23K35/0222B23K35/282
Inventor 刘树英谭超张冬冬马宁马景灵
Owner HENAN UNIV OF SCI & TECH
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