Tungsten electrode argon arc welding active flux for increasing welding fusion depth

A technology of argon tungsten arc welding and active flux, applied in welding medium, welding equipment, welding equipment and other directions, can solve the problems of difficult flux coating operation, uneven welding penetration, poor coating adhesion, etc., to improve The effect of forming quality and weld surface slag removal, welding production cost reduction, and strong adhesion

Inactive Publication Date: 2004-12-22
国营七四一四厂
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Chinese patent application CN1359782A discloses a stainless steel tungsten argon arc welding flux for increasing welding penetration, in which SiO 2 The content is 50-80, and the proportion is too high, which will lead to the poor adhesion of the coating formed by the flux on the surface of the metal to be welded and the difficulty of flux coating operation. Under the action of arc blowing force and argon flow, it will cause welding penetration. inhomogeneous, additionally, SiO 2 A high content will also lead to uneven precipitation during the placement process after the flux is reconciled, which will directly affect the welding quality. At the same time, because the flux contains CaO, it is easy to absorb...

Method used

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Effect test

Embodiment 1

[0012] Embodiment 1, the proportioning relationship of the present embodiment is (% by weight): Cr 2 o 3 70,TiO 2 10, CaF 2 20. Put the above-mentioned components with a particle size of ≤0.3mm in the grinding equipment to fully grind them, mix them evenly, and prepare active flux after drying and cooling. Before welding the active flux, use alcohol or acetone to reconcile the active flux into Paste, in which the volume ratio of active flux to alcohol or acetone is 1:2~1:4, and then evenly coated on the part to be soldered (coating thickness ≤ 0.2mm, coating unilateral width 4 ~ 10mm), Solder after the alcohol or acetone evaporates.

Embodiment 2

[0013] Embodiment 2, the proportioning relationship of the present embodiment is (% by weight): Cr 2 o 3 65,TiO 2 15. NaF20, put the above-mentioned components with a particle size of ≤0.3mm in the grinding equipment to fully grind them, mix them evenly, and prepare active flux after drying and cooling, and use alcohol or acetone to dissolve the active flux before welding. Reconcile it into a paste, in which the volume ratio of active flux to alcohol or acetone is 1:2~1:4, and then apply it evenly on the part to be welded (the thickness of the coating is ≤0.2mm, and the width of one side of the coating is 4~10mm ), solder after the alcohol or acetone evaporates.

Embodiment 3

[0014] Embodiment 3, the proportioning relationship of the present embodiment is (% by weight): Cr 2 o 3 15.TiO 2 80, MgF 2 5. Put the above-mentioned components with a particle size of ≤0.3mm in the grinding equipment to fully grind them, mix them evenly, and prepare active flux after drying and cooling. Before welding the active flux, use alcohol or acetone to reconcile the active flux into Paste, in which the volume ratio of active flux to alcohol or acetone is 1:2~1:4, and then evenly coated on the part to be soldered (coating thickness ≤ 0.2mm, coating unilateral width 4 ~ 10mm), Solder after the alcohol or acetone evaporates.

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PUM

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Abstract

An active welding flux of W-electrode argon arc welding for increasing the welded depth contains Cr2O3, TiO2 and metallic fluoride. It can increase the welded depth by more than 3 times. Its advantages are narrow width being affected by welding heat, high productivity and low cost.

Description

technical field [0001] The invention relates to a tungsten argon arc welding active flux for carbon structural steel, low-alloy high-strength steel, heat-resistant steel (Cr-Mo), stainless steel, low-temperature steel, ultra-high-strength steel and the like. Background technique [0002] As a high-quality precision welding technology, argon tungsten arc welding is an ideal method for welding various non-ferrous metals and alloys, stainless steel, high-temperature alloys, ultra-high-strength steel, etc. However, argon tungsten arc welding has the disadvantages of small single-pass penetration (≤3mm) and low welding productivity. For weldments with a thickness exceeding 3mm, multi-layer filler wire welding with open grooves is required, and sometimes preheating is required. Only then can welding be carried out. Therefore, when argon tungsten arc welding is used to weld medium and thick plates, the production efficiency is low, the working conditions are poor, and the welding ...

Claims

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Application Information

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IPC IPC(8): B23K9/167B23K35/22
Inventor 张立武吴军
Owner 国营七四一四厂
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