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Welding wire for effectively improving the welding structure of Mg-Al series magnesium alloy

A magnesium alloy and welding wire technology, which is applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problem of no magnesium alloy flux-cored wire patent report, inability to be used as outer cladding material, and poor plasticity of magnesium alloy and other problems, to improve the quality of welded joints, the method is simple, and the effect of increasing compactness

Active Publication Date: 2019-02-22
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the poor plasticity of magnesium alloy itself, it cannot be used as the outer cladding material, so there is no relevant patent report on magnesium alloy flux-cored welding wire.

Method used

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  • Welding wire for effectively improving the welding structure of Mg-Al series magnesium alloy
  • Welding wire for effectively improving the welding structure of Mg-Al series magnesium alloy
  • Welding wire for effectively improving the welding structure of Mg-Al series magnesium alloy

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specific Embodiment approach

[0046] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0047] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0048] As introduced in the background technology, in the prior art, the magnesium alloy itself has poor plas...

Embodiment 1

[0072] Automatic argon arc butt welding of AZ31B magnesium alloy rolled plates:

[0073] (1) The thickness of AZ31B magnesium alloy rolled plate is 3mm, and the size is 50×110mm;

[0074] (2) Before welding, use sandpaper and steel brush to remove the oxide layer on the surface of the plate to be welded, and then clean the surface of the plate with acetone to remove various impurities;

[0075] (1) The magnesium alloy flux cored wire used is 1.6mm in diameter, the inner core is AZ31 wire with a diameter of 0.8mm, and the flux core powder composition of the wire is: Zn: 0.3%, Mn: 0.3%, MgCO 3 : 3.2%, Sr: 0.2%, Ce: 0.3%, Nd: 0.4%, Al-Mg alloy powder is the balance, and the particle size of the core powder is between 80 and 100 mesh;

[0076] (3) Carry out argon arc welding on the AZ31B plate, the welding parameters are: arc voltage 15V, AC 120A, the front shielding gas of the plate to be welded is argon gas with a purity of 99.9%, the gas flow rate is 16L / min, and the back shie...

Embodiment 2

[0083] Argon arc butt welding of AM30 magnesium alloy rolled plates:

[0084] (1) The thickness of AM30 magnesium alloy rolled plate is 2.5mm, and the size is 60×120mm;

[0085] (2) Before welding, use sandpaper and steel brush to remove the oxide layer on the surface of the plate to be welded, and then clean the surface of the plate with acetone to remove various impurities;

[0086] (3) The magnesium alloy flux cored wire used is 1.6mm in diameter, the inner core is AM30 wire with a diameter of 0.8mm, and the flux core powder composition of the wire is: Zn: 0.2%, Mn: 0.4%, MgCO 3 : 3.3%, Sr: 0.3%, Ce: 0.2%, Nd: 0.5%, Al-Mg alloy powder is the balance, and the particle size of the core powder is between 100 and 120 mesh;

[0087] (4) Carry out argon arc welding on the AM30 plate, the welding parameters are: arc voltage 15V, AC 130A, the front shielding gas of the plate to be welded is argon gas with a purity of 99.9%, the gas flow rate is 16L / min, and the back shield gas is ...

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Abstract

The invention relates to a welding wire for effectively improving the welding structure of Mg-Al series magnesium alloy, and belongs to the technical field of welding technologies in material processing. An inner core (Mg-Al series magnesium alloy), a flux-cored powder(the flux-cored powder comprises the following components of, in percentage by mass, 0.2-0.8% of Zn, 0.3-0.6% of Mn, 3.2-3.7% of MgCO3, 0.1-2.7% of Sr, 0.03-0.6% of Ce, 0.05-0.5% of Nd, and the balance Al-Mg alloy powder) and a sheath material form a magnesium alloy flux-cored wire. The method is mainly suitable for Mg-Al magnesium alloy welding, the grain of the welding seam can be greatly refined in the welding process of the coated flux-cored powder, the number of the Mg17Al12 hard brittle precipitation phases is reduced,air holes and the thermal cracking tendency are reduced, the microstructure and the mechanical property of the magnesium alloy welding joint are greatly improved, the welding wire has important significance for promoting engineering application of magnesium alloy.

Description

technical field [0001] The invention belongs to the technical field of magnesium alloy welding, and in particular relates to a welding wire for effectively improving the welding structure of Mg-Al series magnesium alloys. Background technique [0002] Magnesium alloy is currently the lightest metal structural material, with advantages such as low density, high specific strength, and easy forming, and is widely used in aerospace, automotive electronics and other fields. Among them, the Mg-Al series magnesium alloy is currently the most abundant and widely used magnesium alloy series, and is widely used in the automotive field. AZ series magnesium alloys such as AZ31, AZ80 and AZ91 have high yield strength and are widely used in the manufacture of thin-walled die-casting parts with complex shapes, such as engine and drive train housings, electronic equipment housings, and hand tools. AM-series magnesium alloys with slightly lower aluminum content (such as AM30, AM50, AM60) ha...

Claims

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Application Information

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IPC IPC(8): B23K35/02B23K35/28
CPCB23K35/02B23K35/0261B23K35/0266B23K35/28B23K35/284B23K35/286
Inventor 刘洪涛周吉学林涛刘玉李涛赵静蕊吴建华刘运腾马百常张琳琳
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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