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Active welding method for filler wire welding

A welding method and wire-filling welding technology, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., can solve the problems of active welding that cannot be filled with wire, reduce welding passes, simplify welding process, and improve production efficiency effect

Inactive Publication Date: 2008-08-20
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%, ZnO 46.2%, 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, ...

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%, ZnO 55%, the diameter of the magnesium alloy welding 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...

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%, ZnO 20%, 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 inclinati...

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Abstract

The invention relates to an active welding method applying to the filler wire welding, belonging to the material engineering technical field, which is characterized in that: the active agent is equably packaged in welding wire or is coated on the surface of welding wire. When the invention is applied to magnesium alloy welding, the active agent is composed of MnCl2, CaCl2, MnO2, and ZnO and the weight proportion is MnCl2: 10% to 40%, CaCl2: 5% to 20%, MnO2; 15% to 30% and ZnO: 20% to 60%. The active agent addition quantity lies on the surface area of welding wire, 0.2 to 0.8mg / mm2. The active welding method has the advantages that: the invention overcomes the difficulty of wire fill and weld joint moulding; the weld joint of the invention is uniform and beautiful; the welding penetration of the invention is one to three times of the ordinary filler wire welding; the welding times of thick panels are reduced; the welding deformation is efficiently depressed; the intensity of weld joint is improved; the welding craft is simplified; the productivity 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 Applications(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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