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Welding stick special for high-heat input steel and preparation method
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A technology of large line energy and welding wire, applied in welding equipment, welding medium, manufacturing tools, etc., can solve the problems of unstable arc, poor welding seam forming, inconvenient operation, etc., and achieve stable arc, small spatter, and beautiful welding seam forming. Effect
Inactive Publication Date: 2018-11-30
ATLANTIC CHINA WELDING CONSUMABLES
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Although it is used in the welding of non-painted bridge steel, the arc is stable, the spatter is small, the slag is easy to remove, the weld shape is beautiful, and it is suitable for all-position welding. Welding of high-energy steel plates has disadvantages such as inconvenient operation during welding, unstable arc, poor weld formation, poor low-temperature impacttoughness at -40°C after welding, and the diffusible hydrogen content of the deposited metal is greater than 10mL / 100g
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Embodiment 1
[0030] The steel strip of (width * thickness) 14 * 0.6mm is used as the sheath of welding wire, and its chemical composition is C 0.035wt%, Mn0.23wt%, Si 0.01wt%, S 0.005wt%, P 0.07wt%, and the balance is Iron and unavoidable impurities;
[0032] In this embodiment, the flux core accounts for 20 wt% of the whole welding wire.
[0033] Put the steel strip in the welding wire forming machine, inject the ready-to-use flux core mixture into the groove of the steel strip bent transversely into a "U" shape, and then roll it into wire, and then finely draw it to ￠1.6mm. .
[...
Embodiment 2
[0042] The sheath of the welding wire is the same as in Example 1.
[0043] Prepare 100g drug core, the ingredients in the drug core are: 3g of fluoride, 10g of ferrosilicon powder, 2g of aluminum iron powder, 10g of ferromanganese powder, 8g of nickel powder, 2g of potassiumtitanate, 1.0g of fused magnesia, 8g of ferromolybdenum , Feldspar powder 7g, the balance is iron powder. until the total weight of the drug core ingredients is 100g; then mix the ingredients in the drug core evenly and set aside;
[0044] In this embodiment, the flux core accounts for 20 wt% of the whole welding wire.
[0045] Put the steel strip in the welding wire forming machine, inject the ready-to-use flux core mixture into the groove of the steel strip bent transversely into a "U" shape, and then roll it into wire, and then finely draw it to ￠1.6mm. .
[0046] In this embodiment, welding parameters: I=400A, U=40V, gas flow rate 20L / min, 100% CO2, linear energy: 235KJ / cm, its mechanical propertie...
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Abstract
The invention discloses a welding stick special for high-heat input steel and a preparation method. The welding stick is composed of an outer steel belt and a flux core. The flux core comprises, by weight, 3-5 parts of fluoride, 5-10 parts of ferrosiliconpowder, 1-3 parts of aluminum and iron powder, 6-10 parts of ferromanganesepowder, 8-12 parts of nickelpowder, 1-5 parts of potassiumtitanate, 0.2-1.0 part of fused magnesite, 1-10 parts of ferromolybdenum, 5-10 parts of feldspar powder and 40-55 parts of iron powder. Compared with the prior art, the welding stick special for the high-heatinput steel and the preparation method achieve the purposes that the welding process performance is good, electric arcs are stable, spattering is small and the weld appearance is attractive; and on performance, the purpose of good -40 DEG C low-temperature impacttoughness is achieved.
Description
technical field [0001] The invention relates to the technology in the field of welding materials, in particular to a special welding wire for high energy input steel, a preparation method and a welding method. Background technique [0002] Large energy input steel, the steel with much higher welding input energy than the general welding conditions will not cause a significant decrease in the toughness of the welding zone and will not produce welding cracks, that is, high energy input steel, generally the input energy is greater than 50KJ / cm The steel is called high-energy-input steel. When the online energy of general steel grades is greater than 50KJ / cm, the mechanical properties will be significantly reduced, and cracks will easily occur. Therefore, ordinary steel plates cannot meet the requirements of large line energy. [0003] In order to match the welding of high-energy-input steel, engineering companies generally use a combination of high-energy-input welding steel ...
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