SU1590264A1 - Method of arc welding - Google Patents

Abstract

The invention relates to gas-shielded arc welding and can be used mainly for welding with a non-consumable arc submerged arc of structures of a wide range of thicknesses of aluminum and magnesium alloys used in various engineering fields. The aim of the invention is to improve the quality of the weld and the expansion of technological capabilities. Arc welding with a submerged arc with a non-consumable electrode is conducted in a medium with gels with argon ring protection. Before welding, the butt end of the welding torch is preheated to a temperature of 0.7-0.8 melting point of the material being welded and maintain the set temperature during the welding process.

Description

The invention relates to gas-shielded arc welding and can be used mainly for welding with a non-consumable electrode with a submerged arc of structures of a wide range of thicknesses of aluminum and magnesium alloys used in various engineering fields.

The purpose of the invention is to improve the quality of the weld and the expansion of technological capabilities.

The method is carried out as follows.

Arc welding neplav w; ids electrode lead in a medium gels with annular protection with argon and at the same end

Before welding, the nozzles of the welding torch are preheated by an additional heating device installed on the nozzle body and by emitting a non-immersed welding arc to a temperature of 0.7-0.8 melting point of the material being welded.

Studies have shown that for aluminum-magnesium alloys to prevent sticking of the easily evaporated components of the alloyed alloys, it is sufficient to heat it to 300-400 ° C at the end of the burner nozzle, which is 0.7-0.8 melting points of these alloys. Heating is carried out for 15–20 s.

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i Heating of the end face of the welding nozzle to a temperature of 0.5–0.6 of the melting temperature of the alloy being welded is not enough. This ensures that the evaporation components do not adhere to the evaporator during the welding process at the end of the weld. Heating above the temperature O ,, 8 of the melting temperature of the material being welded is impractical due to tO in that the quality of the weld is not changed. The absence of oxides of easily degraded components of the alloy on the trade of the nozzle of the welding torch prevents the cost of filler wire

31, O, 3x20x100x1.7 + 3x3x20x1.7x xO, 8 1,06 rub.

3 20x1.5x1.5x1.7x0.8 0.06 rub.

Energy costs

The 27.48x0.008 0.21 rub.

3 | 3,4x0,008 0,07 rub.

Initial data for the calculation

3603 4.62 + 1.06 + 0.21 5.89 rub.

Zviedr 0.84 + 0.06 + 0.07 0.97 rub

Save costs when welding one meter, weld

3 5.89 - 0.97 4.92 rubles.

The application of the method allows reducing the angular deformations by a factor of 2-3 to eliminate the subsequent editing of the product to reduce erosion of the electrode, which leads to a decrease in the level of tungsten inclusions in the weld, to ensure more thorough destruction and to remove oxide films of the joint of parts.

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getting them into the weld pool, | 5

o 5 ensure the required quality of the welded

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Example. It is carried out by helium-arc- welding with a submerged arc of a non-floating 1GAC electrode at a direct current of 20 kJ my field with a ring protected by argon of the AMg-6 alloy with a thickness. 3) mm in one pass without cutting. zazarivaemym edges and the fate of presentation

Claims (1)

unit wire, with a welding current of 25 Claims of the invention within 450-500 A and a voltage of HJ arc of 11-12 V. The depth of the electrode is 2-3 mm at a welding speed of 6-8 m / h. A nozzle made of 12X18H9T alloy with a housing closed on three sides and installed on an asbestos gasket is heated to. The method of arc welding is non-melting with an electrode, in which welding is given with concentric feed gels and 30 argon, characterized by the fact that, in order to improve the quality of the pile. the new seam and expansion of technological capabilities, the end of the nozzle of the welding torch before welding Efficiency calculation. Salary of the main workers 3 1,2x3,85 4,62 ru. 3 1.2x0.7 0.84 rub. Filler wire costs 31, O, 3x20x100x1.7 + 3x3x20x1.7x xO, 8 1,06 rub. 3 20x1.5x1.5x1.7x0.8 0.06 rub. Energy costs The 27.48x0.008 0.21 rub. 3 | 3,4x0,008 0,07 rub. Initial data for the calculation 3603 4.62 + 1.06 + 0.21 5.89 rub. Zviedr 0.84 + 0.06 + 0.07 0.97 rub. Save costs on welding of one running meter, weld 3 5.89 - 0.97 4.92 rubles. The application of the method makes it possible to reduce the angular deformations by a factor of 2-3 and eliminate the subsequent straightening of the product, reduce erosion of the electrode, which leads to a decrease in the level of tungsten inclusions in the weld, to ensure more thorough destruction and removal of oxide films of the joint of parts. I Invention Formula The method of arc welding with a non-consumable electrode, in which welding is carried out with concentric feeding of gels and argon, characterized in that, in order to improve the quality of the weld and expand the technological capabilities, the end of the nozzle of the welding torch before welding heated to a temperature of 0.7-0.8 melting point of the material being welded and maintain the desired temperature during the welding process.