Brazing filler metal for 6 series aluminum alloy low-temperature vacuum brazing and preparation method thereof

A low-temperature vacuum and aluminum alloy technology, applied in welding equipment, metal processing equipment, welding/cutting media/materials, etc., can solve problems affecting the performance, strength reduction, and integrity weakening of 6-series aluminum alloys, and achieve good spreading Effect of plasticity and plasticity, less oxidized surface, easy handling and control

Inactive Publication Date: 2018-03-23
成都固联科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is: in order to solve the problem that the Sn-based solder of the prior art is easy to cause strength reduction when welding 6 series aluminum alloys,

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a kind of brazing material for low-temperature vacuum brazing of 6 series aluminum alloys, which comprises raw materials aluminum, tin, gallium, indium, bismuth, magnesium, and silicon melted according to the following mass percentage ratio: aluminum: 6% -7%; tin: 23%-24%; gallium: 9%-10%; indium: 7%-8%; bismuth: 39%-40%; magnesium: 12%-13%; silicon: 4%-5% %.

[0023] Further, raw materials titanium, vanadium and zirconium are also included, and the mass sum of said titanium, vanadium and zirconium accounts for 1% of the total mass of raw materials.

[0024] Further, the weight ratio of titanium, vanadium and zirconium is 1:1:1.

[0025] The preparation method of above-mentioned solder:

[0026] Step 1: Weigh aluminum: 6%-7%; tin: 23%-24%; gallium: 9%-10%; indium: 7%-8%; bismuth: 39%-40%; magnesium : 12%-13%; silicon: 4%-5% raw materials of each component;

[0027] The second step: put the raw materials weighed in the first step into the sea...

Embodiment 2

[0032] When the thickness of the welded 6-series aluminum alloy plate is less than 25mm, the following processing methods are suitable:

[0033] Step 1: Weigh aluminum: 6%-7%; tin: 23%-24%; gallium: 9%-10%; indium: 7%-8%; bismuth: 39%-40%; magnesium : 12%-13%; silicon: 4%-5% raw materials of each component;

[0034] The second step: put the raw materials weighed in the first step into the sealed crucible;

[0035] Step 3: At the same time, continue to feed the argon-helium mixed gas into the crucible, and discharge the air in the crucible until the argon-helium mixed gas fills the inner space of the crucible; the content of helium in the argon-helium mixed gas is ≤1%;

[0036] Step 4: Under the protection of argon-helium mixed gas, heat and melt the raw materials. When the temperature rises to 337°C-400°C, the alloy is completely melted and kept for 20min-30min to make the composition of the alloy melt relatively uniform. Under the protection of helium mixed gas, the alloy m...

Embodiment 3

[0039] When the thickness of the welded 6-series aluminum alloy plate is 25mm-50mm, the following processing methods are suitable:

[0040] Step 1: Weigh aluminum: 6%-7%; tin: 23%-24%; gallium: 9%-10%; indium: 7%-8%; bismuth: 39%-40%; magnesium : 12%-13%; silicon: 4%-5% raw materials of each component;

[0041] The second step: put the raw materials weighed in the first step into the sealed crucible;

[0042] Step 3: At the same time, continue to feed the argon-helium mixed gas into the crucible, and discharge the air in the crucible until the argon-helium mixed gas fills the inner space of the crucible; the content of helium in the argon-helium mixed gas is 10%-35%;

[0043] Step 4: Under the protection of argon-helium mixed gas, heat and melt the raw materials. When the temperature rises to 337°C-400°C, the alloy is completely melted and kept for 20min-30min to make the composition of the alloy melt relatively uniform. Under the protection of helium mixed gas, the alloy me...

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PUM

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Abstract

The invention discloses brazing filler metal for 6 series aluminum alloy low-temperature vacuum brazing and a preparation method thereof, and relates to the technical field of aluminum alloy welding brazing filler metal preparation. The brazing filler metal is formed by smelting the following raw materials including, by mass, 6-7% of aluminum, 23-24% of tin, 9-10% of gallium, 7-8% of cobalt, 39-40% of bismuth, 12-13% of magnesium, and 4-5% of silicon. The brazing filler metal is formed by melting the multiple components, has good spreadability and plasticity and can be effectively matched with6 series aluminum alloy.

Description

technical field [0001] The present invention relates to the technical field of preparation of aluminum alloy welding filler metal, more specifically relates to a kind of filler metal used for low-temperature vacuum brazing of 6 series aluminum alloy and its preparation method. Background technique [0002] Aluminum alloy is the most widely used non-ferrous metal structural material in industry at present, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, shipbuilding and chemical industry. With the rapid development of science and technology and industrial economy in recent years, the demand for welded structural parts of aluminum alloys is increasing, and the research on the weldability of aluminum alloys is also in-depth. The wide application of aluminum alloy has promoted the development of aluminum alloy welding technology, and the development of welding technology has expanded the application field of aluminum alloy, so the welding te...

Claims

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Application Information

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IPC IPC(8): B23K35/26B23K35/40
CPCB23K35/264B23K35/40
Inventor 蒋波仲军德李海明姚世乙邓威
Owner 成都固联科技有限公司
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