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Active agent used for aluminum alloy MIG (metal-inert gas) welding and application method of active agent

A technology of active agent and aluminum alloy, applied in welding medium, welding equipment, welding equipment, etc., can solve the problems of insignificant improvement of mechanical properties and microstructure of welded joints, complicated operation, etc.

Active Publication Date: 2014-05-14
CRRC QINGDAO SIFANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the above-mentioned method for improving the penetration depth of aluminum alloy MIG welding seam, the active agent is sprayed on the surface of the welded aluminum alloy structure by plasma spraying, which has very strict requirements on the process parameters of the spraying voltage, current and pressure, and the operation is complicated. , the above-mentioned method of improving the weld penetration of aluminum alloy MIG welding only increases the weld penetration, and the mechanical properties and microstructure of the welded joint are not significantly improved.

Method used

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  • Active agent used for aluminum alloy MIG (metal-inert gas) welding and application method of active agent
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  • Active agent used for aluminum alloy MIG (metal-inert gas) welding and application method of active agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Respectively by following activator in the weight ratio in table two:

[0059] Table II

[0060]

[0061] According to the above weight ratio, the active agent ingredients are mixed thoroughly and evenly mixed with the organic solution. The organic solution is acetone or 1% hydroxyethyl cellulose solution, and stirred into a paste; the four groups of base materials are carefully brushed with a stainless steel wire brush. Grind until the bright metal is exposed, wipe the surface of the workpiece with acetone to remove surface oil; apply the prepared paste on a part of the surface of the welding workpiece, and weld the other part without coating the active agent. The original metallic luster is suitable; use a hair dryer to blow to the surface of the workpiece, and perform normal MIG welding on the four groups of workpieces after the organic solution evaporates.

[0062] In terms of the macroscopic appearance of the weld: the front of the weld without activator is we...

Embodiment 2

[0071] active agent B 2 o 3 , NaF, SiO 2 and MgCO 3 The powder particle composition is distributed by weight percentage, respectively B 2 o 3 : 40%, NaF: 40%, SiO 2 : 15%, MgCO 3 : 5%.

[0072] According to the above weight ratio, the active agent ingredients are mixed well and then mixed with the organic solution. The organic solution is selected from acetone or 1% hydroxyethyl cellulose solution and stirred into a paste; the base material is carefully polished with a stainless steel wire brush, Until the bright metal is exposed, wipe the surface of the workpiece with acetone to remove the surface oil; apply the prepared paste on the surface of the welding workpiece, and it is advisable to cover the original metal luster when coating; use a hair dryer to blow on the surface of the workpiece , After the organic solution volatilizes, the workpiece is subjected to normal MIG welding.

[0073] The shape of the formed weld is close to the shape when the H4 activator is use...

Embodiment 3

[0079] active agent B 2 o 3 , NaF, SiO 2 and MgCO 3 The powder particle composition is distributed by weight percentage, respectively B 2 o 3 : 55%, NaF: 25%, SiO 2 : 15%, MgCO 3 : 5%.

[0080] According to the above weight ratio, the active agent ingredients are mixed well and then mixed with the organic solution. The organic solution is selected from acetone or 1% hydroxyethyl cellulose solution and stirred into a paste; the base material is carefully polished with a stainless steel wire brush, Until the bright metal is exposed, wipe the surface of the workpiece with acetone to remove the surface oil; apply the prepared paste on the surface of the welding workpiece, and it is advisable to cover the original metal luster when coating; use a hair dryer to blow on the surface of the workpiece , After the organic solution volatilizes, the workpiece is subjected to normal MIG welding.

[0081] The shape of the formed weld is close to the shape when the H4 activator is use...

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Abstract

The invention relates to an active agent used for aluminum alloy MIG (metal-insert gas) welding and an application method of the active agent. The active agent is prepared by powder particles including, by weight, 40%-55% of B203, 25%-40% of NaF, 10%-15% of Si02 and 0% to 5% of MgC03 with the particle size ranging from 60 to 80 micrometers and the fineness ranging from 95% to 99%. The application method includes: performing burdening on the active agent according to the weight, blending a mixture with an organic solution after the mixture is well blended, and stirring the same into paste; carefully polishing base metal with a stainless steel wire brush till the polished metal is exposed and using acetone to scrub the surface of a work piece to remove surface oil stains; covering the prepared paste on the surface of the welding work piece till metal luster is covered; performing normal MIG welding after the organic solution is volatilized. By the application of the active agent, welding line grains can be refined, weld microstructure can be improved, weld penetration can be increased, property of welded joint can be improved, and operation easiness can be achieved.

Description

technical field [0001] The invention relates to an activator for MIG welding and a usage method thereof, in particular to an activator for aluminum alloy MIG welding and a usage method thereof. Background technique [0002] Aluminum alloy has the advantages of light weight, high specific strength, and corrosion resistance. It is increasingly widely used in chemical containers, aerospace, marine vehicles, power electronics and other industries, and has become one of the most commonly used non-ferrous metal materials. Research on welding methods and processes for aluminum alloys has increasingly attracted people's attention. Due to the large specific heat capacity and thermal conductivity of aluminum alloys, the welding deformation is large, and energy-concentrated welding methods are usually used, such as tungsten inert gas (TIG welding for short), plasma arc welding, and laser welding. , electron beam welding and metal inert-gas welding (MIG welding for short), etc. Compare...

Claims

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Application Information

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IPC IPC(8): B23K35/362B23K9/173
CPCB23K9/173B23K35/362
Inventor 路浩张洪涛王心红石中年刘胜龙
Owner CRRC QINGDAO SIFANG CO LTD
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