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5A06 aluminum alloy pipe butt welding method

A welding method and technology for aluminum alloy pipes, which are applied in welding equipment, arc welding equipment, metal processing equipment and other directions, can solve the problems of uncontrolled appearance forming, easy generation of hot cracks and pores, etc., so as to improve the welding effect and quality, The effect of improving weld yield, high strength and toughness

Inactive Publication Date: 2020-09-08
INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the existing 5A06 aluminum alloy is easy to produce thermal cracks and pores during welding, and the appearance is not controlled. Pores, cracks, incomplete penetration, weld collapse and other defects

Method used

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  • 5A06 aluminum alloy pipe butt welding method
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  • 5A06 aluminum alloy pipe butt welding method

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Experimental program
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Effect test

Embodiment 1

[0030] A 5A06 aluminum alloy pipe butt welding method according to the present invention, wherein the wall thickness of the aluminum-magnesium alloy pipe is 5-10mm; the welding method includes pre-welding treatment, welding, and post-weld treatment; wherein the pre-weld treatment includes the workpiece Preheating, welding torch preheating, workpiece and welding wire cleaning, the welding process adopts argon tungsten arc welding, and the process parameters of the welding process are: the welding joint adopts a "V"-shaped butt joint groove, the welding level is 2 layers and 2 layers, and the bottoming The welding current is 150±5A, the cover welding current is 130±5A; the gas flow rate is 10-15L / min; the tungsten pole is cerium tungsten electrode, the diameter is 2.4-3.0mm; the welding wire grade is HS331, the model is SAIMg-5Ti, the welding wire The diameter is 2.4mm; the polarity of the power supply is AC.

[0031] Pre-weld treatment: The workpiece and welding wire are only c...

Embodiment 2

[0035] A 5A06 aluminum alloy pipe butt welding method according to the present invention, wherein the wall thickness of the aluminum-magnesium alloy pipe is 5-10mm; the welding method includes pre-welding treatment, welding, and post-weld treatment; wherein the pre-weld treatment includes the workpiece Preheating, welding torch preheating, workpiece and welding wire cleaning, the welding process adopts argon tungsten arc welding, and the process parameters of the welding process are: the welding joint adopts a "V"-shaped butt joint groove, the welding level is 2 layers and 2 layers, and the bottoming The welding current is 150±5A, the cover welding current is 130±5A; the gas flow rate is 10-15L / min; the tungsten pole is cerium tungsten electrode, the diameter is 2.4-3.0mm; the welding wire grade is HS331, the model is SAIMg-5Ti, the welding wire The diameter is 2.4mm; the polarity of the power supply is AC.

[0036] Pre-welding treatment: Preheating the welding torch in advanc...

Embodiment 3

[0040]A 5A06 aluminum alloy pipe butt welding method of the present invention, wherein the wall thickness of the aluminum-magnesium alloy pipe is 5-10mm; the welding method includes pre-welding treatment, welding, and post-welding treatment; wherein, the pre-welding treatment includes the workpiece Preheating, welding torch preheating, workpiece and welding wire cleaning, the welding process adopts argon tungsten arc welding, and the process parameters of the welding process are: the welding joint adopts a "V"-shaped butt joint groove, the welding level is 2 layers and 2 layers, and the bottoming The welding current is 150±5A, the cover welding current is 130±5A; the gas flow rate is 10-15L / min; the tungsten pole is cerium tungsten electrode, the diameter is 2.4-3.0mm; the welding wire grade is HS331, the model is SAIMg-5Ti, the welding wire The diameter is 2.4mm; the polarity of the power supply is AC.

[0041] Pre-welding treatment: Preheating the welding torch in advance to...

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Abstract

The invention discloses a 5A06 aluminum alloy pipe butt welding method. An aluminum-magnesium alloy pipe has the wall thickness of 5-10 mm. The welding method comprises the steps of pre-welding treatment, welding, and post-welding, wherein the pre-welding treatment comprises workpiece preheating, welding gun preheating, and cleaning of the workpiece and a welding wire; argon tungsten-arc welding is adopted for the welding process; the technological parameters of the welding process are as follows: a welded joint is in the form of a V-shaped butt groove, the welding level is 2 layers and 2 passes, the electric current of backing welding is 150+ / -5A, the electric current of cosmetic welding is 130+ / -5A, and the gas flow is 10-15L / min; the tungsten electrode is a cerium-tungsten electrode andhas the diameter of 2.4-3.0mm; the brand of the welding wire is HS331; the model of the welding wire is SAIMg-5Ti; the welding wire has the diameter of 2.4mm; and the polarity of a power source is alternating current. The welding method can improve the quality of a welding seam, and ensures that no defects such as pores, cracks, incomplete penetration, and welding seam collapse are generated.

Description

technical field [0001] The invention relates to the field of metal welding, in particular to a butt welding method for 5A06 aluminum alloy pipes. Background technique [0002] The 5-series aluminum alloy is an aluminum alloy with Mg as the main additive element. Because of its good corrosion resistance, it is also called anti-rust aluminum alloy. It is also widely used in AI-Mg alloy, with lower density than pure aluminum, strong seawater corrosion resistance, good weldability and polishability, and higher strength than pure aluminum and AI-Mn alloys. 5A06 aluminum alloy is a non-heat-treated strengthened aluminum alloy with high strength, good corrosion resistance and weldability; it is widely used in aerospace, ships, high-speed trains, automobile manufacturing and other fields, and is completed by TIG welding. Aluminum alloy has fast thermal conductivity and large expansion coefficient. It is easy to produce thermal cracks and pores during multi-layer multi-pass welding,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/028B23K9/167B23K9/235
CPCB23K9/0282B23K9/167B23K9/235
Inventor 杨建唐婧与
Owner INST OF MACHINERY MFG TECH CHINA ACAD OF ENG PHYSICS
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