High-strength high-tenacity electro-gas welding agent core welding wire and preparation method

A technology of gas-electric vertical welding and flux-cored welding wire, which is applied to welding equipment, welding media, manufacturing tools, etc., can solve the problems of high procurement cost, long procurement cycle of welding materials in Japan, and increased construction cost of large oil storage tanks. Good welding process, stable arc and excellent impact performance at low temperature

Active Publication Date: 2014-11-12
TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Japan's long procurement cycle and high procurement cost of welding materials have increased the construction cost of large oil storage tanks in my country

Method used

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  • High-strength high-tenacity electro-gas welding agent core welding wire and preparation method

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Embodiment 1

[0030] A method for preparing a high-strength and high-toughness gas-electric vertical welding flux-cored wire with a strength of 600 MPa, comprising the following process steps:

[0031] (1) Baking: First weigh 20 parts of calcium fluoride, 10 parts of sodium fluoride, 5 parts of barium fluoride, 10 parts of calcium carbonate, 7 parts of magnesium carbonate, 4 parts of barium carbonate, 8 parts of silicon dioxide, 5 parts of potassium oxide, 4 parts of titanium dioxide, 2 parts of sodium oxide, 2 parts of magnesium oxide, and 8 parts of calcium oxide are baked in high-temperature baking equipment at a baking temperature of 420°C;

[0032] (2) Mixing powder: Weigh 50 parts of silicon-manganese alloy, its model is FeMn64Si23, 20 parts of electrolytic manganese, 30 parts of ferrosilicon, its model is FeSi75, 5 parts of aluminum-magnesium alloy, and its ratio of aluminum to magnesium is 1:1, magnesium 5 parts of powder, 20 parts of ferromolybdenum, its model is FeMo60, 60 parts o...

Embodiment 2

[0038] A high-strength and high-toughness gas-electric vertical welding flux-cored wire and a preparation method thereof, the strength of which is at the level of 600MPa, comprising the following steps:

[0039] (1) Baking: First weigh 10 parts of calcium fluoride, 30 parts of sodium fluoride, 5 parts of barium fluoride, 5 parts of calcium carbonate, 10 parts of magnesium carbonate, 5 parts of barium carbonate, 3 parts of silicon dioxide, 2 parts of titanium dioxide, 10 parts of potassium oxide, 7 parts of sodium oxide, and 3 parts of magnesium oxide are baked in high-temperature baking equipment at a baking temperature of 380°C;

[0040] (2) Mixing powder: Weigh 80 parts of silicon-manganese alloy, whose model is FeMn62Si23, 10 parts of electrolytic manganese, 10 parts of ferrosilicon, whose model is FeSi75, 15 parts of aluminum-magnesium alloy, and its ratio of aluminum to magnesium is 1:1, magnesium 10 parts of molybdenum powder, 10 parts of ferromolybdenum, its model is Fe...

Embodiment 3

[0046]A high-strength and high-toughness gas-electric vertical welding flux-cored wire and a preparation method thereof, the strength of which is 600MPa, comprising the following process steps:

[0047] (1) Baking: First weigh 30 parts of calcium fluoride, 10 parts of sodium fluoride, 10 parts of calcium carbonate, 5 parts of magnesium carbonate, 5 parts of silicon dioxide, 3 parts of sodium oxide, 5 parts of magnesium oxide, and 2 parts are baked in high-temperature baking equipment, and the baking temperature is 400°C;

[0048] (2) Mixing powder: Weigh 60 parts of silicon-manganese alloy, its model is FeMn64Si23, 30 parts of electrolytic manganese, 15 parts of ferrosilicon, its model is FeSi75, 7 parts of aluminum-magnesium alloy, and its ratio of aluminum to magnesium is 1:1, magnesium 8 parts of powder, 15 parts of ferromolybdenum, its model is FeMo60, 80 parts of nickel powder, 25 parts of ferrotitanium, its model is FeTi30, 3 parts of ferroboron, its model is FeB2, 687 p...

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Abstract

The invention provides a high-strength high-tenacity electro-gas welding agent core welding wire and a preparation method. The strength of the welding wire is in 600 MPa class. An SPCC-SD cold-rolled low-carbon steel strip is used as a welding wire raw material, a welding wire core is composed of fluoride, carbonate, oxide, ferroalloy and metal powder. The preparation method comprises the steps of baking, powder blending, strip cutting, filling forming, drawing, layering winding, packaging and the like. The 600MPa-class high-strength high-tenacity electro-gas welding agent core welding wire has the advantages that the welding process is good, electric arcs are stable, splashing is small, slag is easy to remove, formation of weld is attractive, and the minus 40 DEG C impact property is excellent. The 600MPa-class high-strength high-tenacity electro-gas welding agent core welding wire is mainly used for welding longitudinal joints of a 100000-stere oil storage tank.

Description

technical field [0001] The invention belongs to welding material preparation technology, in particular to a high-strength and high-toughness gas-electric vertical welding flux-cored wire and a preparation method thereof, the strength of which is 600 MPa. Background technique [0002] At present, my country's economy is in a stage of rapid development, and the demand for energy is growing rapidly. The country has increased investment in the construction of oil reserves, and my country's oil storage tanks are developing in the direction of large-scale and clustering. The construction technology of 100,000 cubic oil storage tanks has also improved accordingly. Automatic welding technology has gradually replaced manual welding and has been widely used in the welding of oil storage tanks, especially the successful application of gas-electric vertical welding technology in the construction of 100,000 cubic oil storage tanks. , greatly improving the welding quality and welding effi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/30B23K35/368
CPCB23K35/0266B23K35/3066B23K35/3605B23K35/368B23K35/406C22C38/002C22C38/04C22C38/08
Inventor 张健
Owner TIANJIN GOLDEN BRIDGE WELDING MATERIALS GRP
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