Surfactant for magnesium alloy TIG welding and its prepn process and usage

A surfactant and magnesium alloy technology, applied in welding equipment, welding equipment, arc welding equipment, etc.

Inactive Publication Date: 2007-06-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Currently effective A-TIG surface agents for magnesium alloys are mainly chlorides (such as CdCl 2 , ZnCl 2 , MgCl 2 , CaCl 2 etc.) and oxides (Cr 2 o 3 、TiO 2 , SiO 2 etc.), the influence of the main single activated flux of the A-TIG welding surfactant on magnesium alloys on the formation of magnesium alloy welds (Mar

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  • Surfactant for magnesium alloy TIG welding and its prepn process and usage
  • Surfactant for magnesium alloy TIG welding and its prepn process and usage

Examples

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example 1

[0019] Surfactant for magnesium alloy TIG welding (mass percentage): 40% CdCl 2 , 25%Cr 2 o 3 , 25%TiO 2 , 10% SiO 2 .

[0020] The surfactants configured according to the above ingredients were mixed and ball milled in a ball mill for 4 hours. The active agent after ball milling is mixed with acetone into a slurry that is easy to coat, and it is evenly coated on the surface of the weld bead of the magnesium alloy workpiece to be welded by spraying, and the coating amount is 2mg / cm 2 . The magnesium alloy workpiece is an AZ61 magnesium alloy extruded plate of 90mm×50mm×4mm, the joint form is a non-groove butt joint, the filler wire is AZ31 magnesium alloy, and the diameter of the welding wire is 2.5mm. NSA-400 AC argon arc welding machine is used on CZ-2 type welding trolley with pure Ar gas protection for welding (industrial argon welding is prone to porosity). The welding process parameters are welding current 100A, welding speed 270mm / min, The flow rate of argon gas ...

example 2

[0022] Surfactant for magnesium alloy TIG welding (mass percentage): 20% CdCl 2 , 35% ZnCl 2 , 15%Cr 2 o 3 , 20%TiO 2 , 10% SiO 2 .

[0023] The surfactants configured according to the above ingredients were mixed and ball milled in a ball mill for 4 hours. The active agent after ball milling is prepared with acetone into a slurry that is easy to apply, and is evenly applied to the surface of the weld bead of the magnesium alloy workpiece to be welded by brushing, and the coating amount is 4mg / cm 2 . The magnesium alloy workpiece is an AZ31 magnesium alloy extruded plate of 90mm×50mm×4mm, the joint form is a non-groove butt joint, the filler wire is AZ31 magnesium alloy, and the diameter of the welding wire is 2.5mm. NSA-400 AC argon arc welding machine is used on CZ-2 type welding trolley with pure Ar gas protection for welding (industrial argon welding is prone to porosity). The welding process parameters are welding current 100A, welding speed 270mm / min, The flow ra...

example 3

[0025] Surfactant for magnesium alloy TIG welding (mass percentage): 60% ZnCl 2 , 15%Cr 2 o 3 , 15%TiO 2 , 10% SiO 2 .

[0026] The surfactants configured according to the above ingredients were mixed and ball milled in a ball mill for 4 hours. The active agent after ball milling is mixed with acetone into a slurry that is easy to apply, and is evenly applied to the surface of the weld bead of the magnesium alloy workpiece to be welded by brushing, and the coating amount is 3mg / cm 2 . The magnesium alloy workpiece is a 90mm×50mm×10mm AZ31 magnesium alloy extruded plate, the joint form is non-groove butt joint, the filler wire is AZ31 magnesium alloy, and the diameter of the welding wire is 2.5mm. NSA-400 AC argon arc welding machine is used on the CZ-2 type welding trolley to use pure Ar gas protection for welding (industrial argon welding seams are prone to porosity). The welding process parameters are welding current 250A, welding speed 270mm / min, The flow rate of arg...

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Abstract

The present invention relates to one kind of surfactant for magnesium alloy TIG welding and its preparation process and usage, and belongs to the field of metal material welding technology. The surfactant consists of CdCl2 and/or ZnCl2 40-60 wt%, Cr2O3 15-25 wt%, TiO2 15-25 wt% and SiO2 for the rest. Its preparation process includes mixing the materials and the subsequent ball milling for 2-4 hr. When the surfactant is used, it is first mixed with acetone and/or alcohol to form slurry for easy applying and then spread to the surface of weld pass in the amount of 1-6 mg/sq cm, and after the coating is dried, TIG welding is performed. The surfactant can ensure the welding seam quality, obviously increase fusion depth of the welding seam, simplify the welding process, raise welding efficiency, and lower production efficiency.

Description

technical field [0001] The invention relates to a magnesium alloy TIG welding surfactant and a preparation and use method thereof, belonging to the technical field of metal material welding techniques. Background technique [0002] As the lightest metal structural material, magnesium alloy has achieved rapid development in the fields of automobiles, aerospace and other fields in recent years. The strong demand for lightweight is the main factor leading to rapid growth. Welding technology has become one of the key technologies restricting the further expansion of the application of magnesium alloys. Magnesium alloys are more difficult to weld than aluminum alloys. During the welding process, magnesium alloy is easy to absorb hydrogen to form pores, and it is easy to oxidize and burn to form oxide film and slag. At the same time, its severe stress deformation has great hot embrittlement. [0003] TIG welding is a commonly used welding method for magnesium alloy welding, but ...

Claims

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Application Information

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IPC IPC(8): B23K35/36B23K9/235
Inventor 刘子利沈以赴徐杰刘希琴
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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