Low-pollution magnesium alloy welding material and preparation process thereof

A technology of welding materials and magnesium alloys, applied in welding/cutting media/materials, welding equipment, welding media, etc., can solve the health hazards of welding workers, waste of magnesium alloy welding materials, welding smoke and high welding pollution, etc. Achieve low welding dust generation rate, improve deposition efficiency, and reduce welding pollution

Active Publication Date: 2012-07-11
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The above studies on the structure, properties and preparation methods of magnesium alloy welding wire mainly focus on improving the structural characteristics of magnesium alloy welding wire itself and optimizing the performance of magnesium alloy welding joints; for magnesium alloy welding materials, the boiling point is low, and the welding process is easy to evaporate and burn to form Problems such as high welding pollution caused by a large amount of welding fume have not been touched
[0005] As we all know, due to the low melting and boiling point of magnesium alloy itself (melting point: 640-660°C, boiling point: 1100-1150°C), violent evaporation and combustion occur during the welding process, and a large amount of welding fumes and harmful gases are formed. , not only wasting a large amount of magnesium alloy welding materials, but also formed significant welding pollution, and at the same time formed a significant hazard to the health of welding workers

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  • Low-pollution magnesium alloy welding material and preparation process thereof
  • Low-pollution magnesium alloy welding material and preparation process thereof
  • Low-pollution magnesium alloy welding material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1: For automatic MIG welding of 6mm thick AZ31 magnesium alloy sheet

[0034] (1) Mg-Zn alloy ingot is used as the basic component, and elements such as neodymium and calcium are added, cast after smelting, and homogenized. The main elemental components measured by fluorescence spectrometer are: Zn 5.85%, Nd 0.70%, Ca 0.82%, Al 0.40%, Mn0.1%, Mg91.78%. The boiling point of the magnesium alloy material was analyzed by a thermal differential analyzer to be 1442°C. The dust generation rate of welding materials is 5.2mg / s.

[0035] (2) A magnesium alloy welding wire with a diameter of 2.2mm was prepared by hot extrusion with an extrusion ratio of 100, and then the magnesium alloy welding wire was directly used for continuous drawing to prepare a welding wire with a diameter of 1.6mm that meets the requirements of MIG automatic welding. Magnesium alloy welding wire, the prepared magnesium alloy welding wire is coiled into a coil, ready for use. The tensile strengt...

Embodiment 2

[0042] Example 2: For automatic MIG welding 6mm thick ZK60 magnesium alloy sheet

[0043] (1) Mg-Zn alloy ingot is used as the basic component, and elements such as neodymium and calcium are added, cast after smelting, and homogenized. The main elemental components measured by fluorescence spectrometer are: Zn 6.05%, Nd 0.78%, Ca 0.2%, Al 0.28%, Mn0.61%, Mg92.02%. The boiling point of the magnesium alloy material was analyzed by a thermal differential analyzer to be 1448°C. After testing, the dust generation rate of welding materials is 4.8mg / s.

[0044] (2) A magnesium alloy welding wire with a diameter of 2.2mm was prepared by hot extrusion with an extrusion ratio of 105, and then the magnesium alloy welding wire was directly used for continuous drawing to produce a diameter of 1.6mm that meets the requirements of MIG automatic welding The magnesium alloy welding wire is prepared by coiling the prepared magnesium alloy welding wire into a coil. The tensile strength of the...

Embodiment 3

[0047] Example 3: TIG welding of 3mm thick AZ31 magnesium alloy sheet for automatic cold filler wire

[0048] (1) Mg-Zn alloy ingot is used as the basic component, and elements such as neodymium and calcium are added, cast after smelting, and homogenized. The main elemental components measured by fluorescence spectrometer are: Zn 5.56%, Nd 0.23%, Ca 0.86%, Al 0.38%, Mn0.29%, Mg92.18%. The boiling point of the magnesium alloy material was analyzed by a thermal differential analyzer to be 1442°C. The dust generation rate of welding materials is 5.0mg / s.

[0049] (2) A magnesium alloy welding wire with a diameter of 2.4mm was prepared by hot extrusion with an extrusion ratio of 110, and then the magnesium alloy welding wire was directly used for continuous drawing to produce a diameter of 1.6mm that meets the requirements of TIG automatic welding The magnesium alloy welding wire prepared by coiling the prepared magnesium alloy welding wire into a coil is ready for use. The ten...

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Abstract

The invention discloses a low-pollution magnesium alloy welding material and a preparation process of the low-pollution magnesium alloy welding material. The low-pollution magnesium alloy welding material comprises the following chemical compositions in percentage by weight: 5.5-6.5% of Zn, 0.1-0.8% of Nd, 0.20-1.0% of Ca, 0.1-0.9% of Mn, 0.1-0.4% of Al, 90.0-93.5% of Mg, a small amount of metal impurities, including Cu, Ni, Fe and Si. The low-pollution magnesium alloy welding material is prepared by a process comprising the following steps of: (1) smelting and casting; (2) homogenizing; and (3) hot extrusion and pulling and extracting. The low-pollution magnesium alloy welding material has the advantages of low pollution, high strength, simple preparation technology and low cost. By improving the boiling point of the magnesium alloy material, the welding dust can be reduced by more than 50% when being compared with the common magnesium alloy welding materials, and the melting deposition efficiency is higher than 80%.

Description

technical field [0001] The invention relates to welding materials, in particular to a magnesium alloy welding material and a preparation process thereof. Background technique [0002] Magnesium alloy is one of the lightest structural materials currently used in industrial manufacturing. In recent years, new magnesium alloys have emerged continuously, and magnesium alloys have been well applied in the fields of automobiles, aircraft, and 3C electronic products. With the expansion of the application of magnesium alloys, welding technology, as a key technology for the application and processing of magnesium alloys, has also been developed accordingly, and the demand for magnesium alloy welding materials has also increased accordingly. At present, there are relatively few researches and developments on magnesium alloy welding materials, mainly including: [0003] General AZ31 and AZ61 magnesium alloy welding consumables produced by NEC. Dalian University of Technology carried...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/28B23K35/40
Inventor 刘黎明张兆栋宋刚王红阳
Owner DALIAN UNIV OF TECH
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