Aluminum-silicon alloy seamless flux-cored wire for brazing as well as preparation and application

A technology of seamless flux-cored welding wire and aluminum-silicon alloy, which is applied in welding equipment, metal processing equipment, welding/welding/cutting items, etc., and can solve the problems of poor processing performance of alloys, etc.

Inactive Publication Date: 2014-02-05
BEIJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Another object of the present invention is to provide a processing method of aluminum-silicon alloy sheet, which solves the problem of poor processing performance of the alloy through non-vacuum casting, extrusion, rolling and annealing processes, and can be prepared by using this method. 0.5mm aluminum-silicon alloy strip

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step (1): The following preparation method is used to prepare an aluminum-silicon master alloy, and its composition and mass percentage are: Si: 30%, Al: balance (referred to as AlSi30).

[0046] The preparation process is as follows:

[0047] a) Prepare raw materials: purchase 99.999% high-purity aluminum raw materials and 99.999% monocrystalline silicon head Si-1 raw materials; calculate and weigh according to the above-mentioned composition and mass percentage ratio.

[0048]b) Use a medium frequency induction furnace to heat, add aluminum ingots to the graphite clay crucible and heat up, melt the aluminum ingots and break the monocrystalline silicon, then add in small amounts in batches, press the silicon into the molten aluminum with a bell jar, and add aluminum The silicon in the liquid dissolves very violently, and the ingot is cast after all the silicon is melted. The casting temperature of the alloy is 720-750°C;

[0049] Step (2):

[0050] Utilize the prepa...

Embodiment 2

[0093] step 1)

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Abstract

The invention provides an aluminum-silicon alloy seamless flux-cored wire for brazing as well as preparation and an application and belongs to the technical field of flux-cored wires. The aluminum-silicon alloy seamless flux-cored wire for brazing takes an aluminum-silicon alloy as an outer skin and takes a flux core as a soldering flux. The preparation comprises the following steps: preparing an outer-skin aluminum-silicon alloy strip by procedures of non-vacuum smelting, extrusion, rolling and annealing; rolling and closing the strip by a pressing roller to form a hollow welding rod with an O-shaped section and cladding flux core powder into the welding rod to prepare a seamless flux-cored wire blank with the diameter range of phi3.8mm-phi4.4mm; and then carrying out drawing and annealing processes to reduce the diameter to phi1.0mm and above. The aluminum-silicon alloy seamless flux-cored wire for brazing provided by the invention has the advantages that a brazing flux is carried and does not need to be added manually, and the automatic welding of brazing can be realized.

Description

technical field [0001] The invention relates to an aluminum-silicon alloy seamless flux-cored wire for brazing and its preparation technology, in particular to the casting and rolling of aluminum-silicon alloy materials, the preparation method and application of the seamless flux-cored wire, and belongs to the field of flux-cored wire technology. Background technique [0002] Due to the advantages of low density and high specific strength, aluminum alloys have been more and more widely used in aviation and aerospace industries. For example, many traditional copper alloy waveguides and high-frequency devices have been replaced by aluminum alloys. It is the most ideal method to manufacture complex aluminum structures by brazing. With the lightweight of vehicles, the application range of aluminum alloy is gradually widening, and its connection, especially welding, has received extensive attention. [0003] One of the commonly used aluminum alloy welding methods is brazing, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/368B23K35/40B23K1/19B23K103/10
CPCB23K35/26B23K35/361B23K35/368B23K35/406B23K2103/10
Inventor 周正陈怡兰贺定勇李刚马艳萍蒋建敏王曾洁
Owner BEIJING UNIV OF TECH
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