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Active welding method for filler wire welding

A welding method and wire-filling welding technology, applied in welding media, welding equipment, welding/cutting media/materials, etc., can solve the problem of wire-filling in active welding, reduce welding passes, simplify welding process, and inhibit welding. deformation effect

Inactive Publication Date: 2009-08-26
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an active welding method for wire-filled welding, which solves the problem that existing active welding cannot fill wire, and the welding effect can combine the advantages of wire-filled welding and active welding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1, argon tungsten arc welding is performed on a magnesium alloy, and a magnesium alloy welding wire coated with an active agent is filled on the surface. The composition of the active agent is: MnCl 2 20.3%, CaCl 2 8.4%, MnO 2 23.1%, ZnO46.2%, the diameter of the selected magnesium alloy welding wire is 3mm.

[0013] Make the active agent into a paste with acetone, and apply the active agent on the surface of the magnesium alloy welding wire with a soft brush. The amount of application is 0.5mg / mm according to the surface area of ​​the welding material. 2 . After coating, place the electrode in a drying box and dry it at 100°C for 1 hour. Use the prepared welding wire to butt weld the magnesium alloy plate with a thickness of 10mm. The welding method is argon tungsten arc welding and manual wire filling.

[0014] The standard parameters of welding are: welding current 260A, arc length 2mm, welding speed 400mm / min, wire filling speed about 600mm / min, torc...

Embodiment 2

[0016] Embodiment 2, plasma arc welding is performed on magnesium alloy, and magnesium alloy welding wire coated with an active agent is filled on the surface. The composition of the active agent is: MnCl 2 10%, CaCl 2 5%, MnO 2 30%, ZnO55%, the diameter of magnesium alloy wire is 3mm.

[0017] Make the active agent into a paste with acetone, and apply it on the surface of the magnesium alloy welding wire with a soft brush. The amount of application is 0.8mg / mm according to the surface area of ​​the welding material. 2 . After coating, place the electrode in a drying box and dry it at 100°C for 1 hour. Use the prepared welding wire to butt weld the magnesium alloy plate with a thickness of 10mm. The welding method is plasma arc welding and manual wire filling.

[0018] Welding current: 120A, welding speed 800mm / min, tungsten electrode diameter 4mm, shielding gas (Ar) flow rate 15L / min, plasma gas (Ar) flow rate 2L / min, arc length 2mm. The weld corrugation is uniform and ...

Embodiment 3

[0019] Embodiment 3, argon tungsten arc welding is performed on a magnesium alloy, and a magnesium alloy welding wire coated with an active agent is filled on the surface. The composition of the active agent is: MnCl 2 40%, CaCl 2 20%, MnO 2 20%, ZnO20%, the diameter of the selected magnesium alloy welding wire is 3mm.

[0020] Make the active agent into a paste with acetone, and apply the active agent on the surface of the magnesium alloy welding wire with a soft brush. The coating amount is 0.2mg / mm according to the surface area of ​​the welding material. 2 . After coating, place the electrode in a drying box and dry it at 100°C for 1 hour. Use the prepared welding wire to butt weld the magnesium alloy plate with a thickness of 8mm. The welding method is argon tungsten arc welding and manual wire filling.

[0021] The standard parameters of welding are: welding current 220A, arc length 2mm, welding speed 400mm / min, wire filling speed about 600mm / min, torch inclination a...

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Abstract

The invention belongs to the technical field of material engineering and relates to an active welding method. An active welding method for filler wire welding, which is characterized in that the active agent is evenly encapsulated in the welding wire or coated on the surface of the welding wire. When the method of the present invention is used for magnesium alloy welding, the active agent is composed of MnCl2, CaCl2, MnO2, ZnO, and its weight ratio is: MnCl210%-40%, CaCl25%-20%, MnO215%-30%, ZnO20%- 60%, the amount of active agent added is 0.2-0.8mg / mm2 based on the surface area of ​​the welding wire. Using the method of the present invention overcomes the disadvantages of difficult wire filling and difficult forming of the weld seam during the existing active welding, and can form a uniform and beautiful weld seam. The welding penetration is increased by 1-3 times compared with ordinary wire filling welding, and it is suitable for thick plate welding. The number of welding passes is reduced, the welding deformation is effectively suppressed, the strength of the welded joint is improved, the welding process is simplified, and the production efficiency is improved.

Description

Technical field [0001] The invention belongs to the technical field of material engineering and relates to an active welding method using an active agent in the welding process. technical background [0002] The existing active welding technology is to apply a thin layer of active agent on the surface of the plate to be welded, causing the welding arc to shrink or the liquid flow mode of the molten pool to change, which can increase the penetration depth by one to two times compared with conventional welding, which is a It is an effective means to increase welding penetration and improve production efficiency. [0003] In the actual production process, filler wire welding is required in most occasions, and filler wire welding is beneficial to ensure the comprehensive properties such as tensile strength and fatigue strength of welded joints. However, if the existing active welding method is used for wire welding, since the surface of the welding plate is coated with a layer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/00B23K35/362B23K35/365
Inventor 刘黎明张兆栋蔡东红
Owner DALIAN UNIV OF TECH
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