Welding method of aluminum alloy thick plate

A welding method and aluminum alloy plate technology, applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problems of easy deformation and large tendency of welding porosity, etc., reduce weld seam, guarantee welding pass rate, and reduce production cost Effect

Active Publication Date: 2018-06-29
THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Since the thick plate of 6082 aluminum alloy adopts MIG welding, the porosity tends to be larger, and deformation problems are more likely to occur, and the position and length of the structural part are not suitable for MIG, so it is necessary to find a welding method that is more suitable for thick plate 6082 aluminum alloy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. A welding method for aluminum alloy thick plates, specifically 6082 aluminum alloy, comprising the following steps:

[0027] 1) The aluminum alloy thick plate is mechanically cleaned before welding, and the aluminum alloy thick plate is soaked in an organic solvent for 2 minutes, and then brushed until the surface of the aluminum alloy thick plate reveals a metallic luster. The organic solvent is composed of acetone and benzene with a volume ratio of 2:1. Mixed, mechanically cleaned aluminum alloy slabs are welded within 2 hours. When the aluminum alloy thick plate is soaked in the organic solvent, use an ultrasonic cleaning machine at a temperature of 60°C and a power density of 0.4w / cm 2 .

[0028] 2) V-shaped groove butt welds are adopted, and the aluminum alloy plate is preheated, and the preheating temperature is 150°C.

[0029] 3) Argon tungsten arc welding is adopted, 5183 welding wire is adopted, multi-layer and multi-pass welding method is adopted. During ...

Embodiment 2

[0033] 1. A welding method for aluminum alloy thick plates, specifically 6082 aluminum alloy, comprising the following steps:

[0034] 1) V-shaped groove butt welds are adopted, and the aluminum alloy plate is preheated, and the preheating temperature is 150°C;

[0035] 2) Adopt argon tungsten arc welding, multi-layer and multi-pass welding method, and weld aluminum alloy plate with a thickness of 20mm. During bottom welding, the shielding gas is passed into the welding torch. The flow rate of the shielding gas is 13L / min, and the current electrode adopts AC , the current is 200A, and the welding of the remaining layers is fully welded by argon tungsten arc welding, the flow rate of the shielding gas is 15L / min, and the current is 220A. The protective gas used in argon tungsten arc welding is a mixed gas of argon and ammonia; the volume fraction of ammonia in the mixed gas is 0.5%.

[0036] In Example 2, after welding the aluminum alloy thick plate with a thickness of 20 mm, ...

Embodiment 3

[0038] 1. A welding method for aluminum alloy thick plates, specifically 6082 aluminum alloy, comprising the following steps:

[0039]1) The aluminum alloy thick plate is mechanically cleaned before welding, and the aluminum alloy thick plate is soaked in an organic solvent for 2 minutes, and then brushed until the surface of the aluminum alloy thick plate reveals a metallic luster. The organic solvent is composed of acetone and benzene with a volume ratio of 2:1. Mixed, mechanically cleaned aluminum alloy slabs are welded within 2 hours. When the aluminum alloy thick plate is soaked in the organic solvent, use an ultrasonic cleaning machine at a temperature of 60°C and a power density of 0.4w / cm 2 .

[0040] 2) V-shaped groove butt welds are adopted, and the aluminum alloy plate is preheated, and the preheating temperature is 150°C;

[0041] 3) Adopt tungsten argon arc welding, multi-layer and multi-pass welding method. During bottom welding, protective gas is introduced in...

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Abstract

The invention discloses a welding method for an aluminum alloy thick plate which is specifically made of a 6082 aluminum alloy. The welding method comprises the following steps of: 1) butting welding seams through V-shaped grooves; 2) adopting tungsten electrode argon arc welding, adopting a multi-layer multi-pass welding method, introducing protective gas with flow being 12-14L / min into a welding gun during backing welding, and adopting alternating-current for a current electrode, wherein current parameters are as follows: current being 170-180 A when the thickness of the aluminum alloy plate is 8-12 mm; and current being 181-200A when the thickness of the aluminum alloy plate is greater than 12mm; 3) welding the rest of layers: completely welding by tungsten electrode argon arc welding with protective gas flow being 15L / min and current being 200A when the thickness of the aluminum alloy plate is 8-12 mm, and completely welding by tungsten electrode argon arc welding with protective gas flow being 15L / min and current being 220A when the thickness of the aluminum alloy plate is greater than 12mm. The welding method disclosed by the invention has the advantages of improving welding quality and solving the easy-to-denature problem.

Description

technical field [0001] The invention relates to a welding process for aluminum alloys. More specifically, the present invention relates to a welding method of aluminum alloy thick plates. Background technique [0002] Aluminum alloy has the advantages of low density, good thermal conductivity, corrosion resistance and formability, and low price. It has been widely used in aerospace, transportation, light industrial building materials, and machinery manufacturing. It is the most widely used and used light alloy. most alloys. The subsequent aluminum alloy welding technology, especially the welding of high-strength aluminum alloy medium and thick plate structural parts, has become an urgent problem to be solved. Improving weld penetration and mechanical properties, reducing welding deformation, reducing the coarsening, crack and porosity tendency of welding heat-affected zone and weld structure are technical problems that researchers have been paying attention to. The weldin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K9/167B23K9/235B23K35/36B23K35/40B23K101/18B23K103/10
CPCB23K9/167B23K9/235B23K35/3605B23K35/404B23K2101/18B23K2103/10
Inventor 周陈成曹建军占仲文田耕裴宗明
Owner THE SIXTH CONSTR CO LTD OF CHINA NAT CHEM ENG
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