Flux-cored welding wire for large heat input gas-electric vertical welding and preparation method thereof

A technology of gas-electric vertical welding and flux-cored welding wire, which is applied in welding equipment, welding media, manufacturing tools, etc., can solve the problems of coarse metal structure and can not meet the welding effect of large-scale thick plate with large heat input, so as to improve impact toughness, Meet the welding efficiency and deposited metal properties, the effect of fast welding speed

Active Publication Date: 2016-04-13
山东聚力焊接材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The gas-electric vertical welding flux-cored wire is widely used in the welding of large medium and thick plates, while the traditional gas-electric vertical welding flux-cored wire will appear pores, cracks, slag inclusions, weld seams and heat-affected zones when welding under high current and voltage conditions Defects such as coarse metal structure cannot meet the high input energy welding effect of large thick plates

Method used

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  • Flux-cored welding wire for large heat input gas-electric vertical welding and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] (1) Take 22kg of reduced iron powder, 18kg of manganese-silicon alloy, 0.4kg of rare earth silicon, 1kg of nickel powder, 1.5kg of sodium fluoride, 3kg of magnesia, 2kg of 45 ferrosilicon, 5kg of aluminum-magnesium powder, 1.8kg of ferromolybdenum, and ferroboron 0.5kg, 3kg of ferrotitanium, respectively weighed, mixed, fully stirred, dried to obtain the formula powder for use;

[0017] (2) Slitting the steel strip, then ultrasonically cleaning, drying, and rolling U-shaped grooves, adding the formula powder obtained in step (1) into the U-shaped grooves, and then closing, reducing, drawing, and winding to obtain the described welding wire.

Embodiment 2

[0019] (1) Take reduced iron powder FHT100.25: 20kg, manganese-silicon alloy FeMn64Si18: 21kg, rare earth silicon 0.1kg, nickel powder 2kg, sodium fluoride 1.3kg, magnesia 2kg, 45 ferrosilicon 2kg, aluminum magnesium powder 6kg, molybdenum Iron FeMo55: 2.3kg, ferroboron 0.8kg, ferro-titanium FeTi30: 4kg, weighed separately, mixed, fully stirred, dried to obtain the formula medicine powder for use;

[0020] (2) Slit the steel strip, then ultrasonically clean, dry, and roll into a U-shaped groove, and add the formula powder obtained in step (1) into the U-shaped groove with a filling factor of 20±0.5%. Then close, reduce diameter, polish, apply metal compound to lubricate, draw wire, take up the wire, and obtain the described welding wire.

Embodiment 3

[0022] (1) Take reduced iron powder FHT100.25: 26kg, manganese-silicon alloy FeMn64Si18: 15kg, rare earth silicon 0.5kg, nickel powder 0.45kg, sodium fluoride 2.6kg, magnesia 5kg, 45 ferrosilicon 3kg, aluminum magnesium powder 3kg, Ferro-molybdenum FeMo55: 1kg, ferro-boron 0.3kg, ferro-titanium FeTi30: 1kg, respectively weighed, mixed, fully stirred, dried to obtain the formula powder for use;

[0023] (2) Slit the steel strip, then ultrasonically clean, dry, and roll into a U-shaped groove, and add the formula powder obtained in step (1) into the U-shaped groove with a filling factor of 20±0.5%. Then close, reduce diameter, polish, apply metal compound to lubricate, draw wire, take up the wire, and obtain the described welding wire.

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Abstract

The invention provides a great line energy gas-electric vertical welding flux core wire and a production method thereof. The great line energy gas-electric vertical welding flux core wire is mainly formed by reduced iron powder, manganese silicon alloy, rare earth silicon, nickel powder, fluoride, magnesia, 45 silicon iron, aluminum and magnesium powder, molybdenum iron, boron iron, titanium iron through production. The metal slag series formula is adopted, the aluminum and magnesium content is appropriately added into a flux core formula, and accordingly the deoxidization capability of the flux core is improved, the content of the iron oxide on the weld surface is reduced, the slag crunchy is increased, the weld deslagging effect is improved. A small amount of elements such as nickel, molybdenum, titanium and boron are added to the flux core and reasonable matching is performed, the proeutectoid ferrite is inhibited through the boron, and accordingly the impact toughness of deposited metal is effectively improved, meanwhile the continuity and the stability of an electric arc are maintained, the requirements of the welding efficiency and the deposited metal performance during thick plate welding are met, the weld metal slag is uniform in coverage, and the weld forming is good.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a gas-electric vertical welding welding material and a preparation method thereof. Background technique [0002] At present, my country has become a world-class steel production country. The construction, transformation and expansion of metallurgical blast furnaces in my country have become larger and larger. The thicker it is, the higher the welding workload will be. Moreover, the welding of large thick ship plates is also quite time-consuming and labor-intensive. my country's traditional metallurgical construction uses electrode arc welding or CO 2 Semi-automatic welding is very labor-intensive, and it is far from meeting the requirements of construction progress and construction quality. The gas-electric vertical welding flux-cored wire is widely used in the welding of large medium and thick plates, while the traditional gas-electric vertical welding flux-cored wire will appe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K35/40
CPCB23K35/0266B23K35/30B23K35/3601B23K35/368B23K35/406
Inventor 孟波王瑞刚张丽生乔吉春
Owner 山东聚力焊接材料有限公司
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