Flux-cored welding wire for downward vertically

A technology of vertically downward feeding, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc. It can solve the problems that are not suitable for vertical downward welding of thin plate corner joints, and achieve easy control of molten pool and production The effect of high efficiency and dense weld seam

Inactive Publication Date: 2002-03-06
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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Problems solved by technology

Therefore, it is not suitable for vertical downward welding of thin plate corner joints.

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] According to the composition range of the flux core of the flux cored wire of the present invention, three batches of flux cored wires were produced, and the flux core composition is shown in Table 1. The seamed O-type Ф1.2mm flux-cored welding wire is made by the method of steel strip crimping. Composition (weight %) of the steel strip: C 0.04%, Si 0.01%, Mn 0.30%, P 0.013%, S0.008. The powder filling rate is 16%.

[0022] Three batches of flux-cored wires were used for welding experiments, and Q235C steel plates were used to process them into 4×120×300mm test plates, and the surface was derusted. Adopt DC(-) polarity, 260A, 28V, welding speed 600mm / min, CO 2 , 201 / min, the rod is extended by 15mm, and the welding is carried out vertically and downward, and the welding process is observed. The results show that the weld is well formed, the slag is removed well, the welding process is stable and there is less spatter. Use the same welding specification to surfacing ...

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Abstract

A flux-corex welding wire fed downward vertically for gas shielded welding is composed of skin made of low-carbon steel and flux core containing TiO2 (20-40 wt%), Al2O3 (1.2-7), ZrO2 (3-8.5), MgO (0.5-3), NaF+K2SiF6 (1.2-4), deoxidizing agent which is one or more of Si, Mn, Ti, Al and Mg (11-20), alloying agent which is one or more of Ni, Cr, MO, Cu and V (less than 5) and Fe (rest).

Description

[0001] Field [0002] The invention belongs to the field of welding materials, in particular to a gas-shielded welding type vertically feeding flux-cored welding wire. Background technique [0003] In prior art, TiO 2 Type gas-shielded flux-cored welding wire has been widely used. This type of welding wire has the advantages of excellent welding processability and high welding efficiency. It has been widely used in all-position welding of carbon steel and 490Mpa high-strength steel. All-position welding generally includes horizontal position, horizontal welding, vertical upward welding, and overhead welding, but does not include vertical downward welding. In the vertical welding, the vertical upward welding is generally welded by the small current swing method, which is easier to realize in terms of technology, but the welding speed is slower; while the vertical downward welding can be welded in a straight line with a larger current, the welding speed is slower. Fast, but th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/22B23K35/24
Inventor 王禄田潘川佟淑英梁东图何长红
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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