CN104148824B - A kind of high tenacity flux-cored wire for electrogas arc welding - Google Patents
A kind of high tenacity flux-cored wire for electrogas arc welding Download PDFInfo
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- CN104148824B CN104148824B CN201410437675.2A CN201410437675A CN104148824B CN 104148824 B CN104148824 B CN 104148824B CN 201410437675 A CN201410437675 A CN 201410437675A CN 104148824 B CN104148824 B CN 104148824B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/365—Selection of non-metallic compositions of coating materials either alone or conjoint with selection of soldering or welding materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
A kind of high tenacity flux-cored wire for electrogas arc welding, comprise mild steel crust and medicine core, it is characterized in that, in described medicine core, each component is with the weight percent meter of whole welding wire, is respectively: CaF
2: 0.5-0.65%; Sodium carbonate: 0.40-0.60%; Potassium-containing compound: 0.10-0.25%; Aluminium (Al) powder: 0.10-0.20%; Molybdenum-iron powder: 0.1-0.30%; Electrolytic manganese: 1.5-3.0%; Ferrosilicon: 0.6-0.75%; Quartz sand: 0.1-0.15%; Ferrotianium: 0.6-0.8%; Aluminium oxide: 0.1-0.15%; Iron powder: 15-20%; The filling rate of described medicine core is 19.1-26.85%.The present invention passes through organic assembly of drug core component and coordinates with mild steel crust, a kind of welding technological properties and the good electro-gas (enclosed) welding flux-cored wire of physicochemical property are provided, arc stability is good, splash less, flue dust is little, de-slag easily, the forming of weld seam positive and negative, restarting is functional, meets the high demanding criteria of electro-gas (enclosed) welding completely.
Description
Technical field
The invention belongs to technical field of welding materials, relate to a kind of high tenacity flux-cored wire for electrogas arc welding.
Background technology
Electro-gas (enclosed) welding is a kind of welding method efficiently, and electro-gas (enclosed) welding is a kind of melting pole gas shielded arc welding method being developed by common gas metal-arc welding and electroslag welding and formed.Its welding efficiency and welding quality are all higher, are mainly used in the cut deal welding of the Shell Plate of boats and ships, also can be applicable to the welding of the bridge box beam web of corresponding size and the cut deal of large-scale storage tank side plate.
Along with social economy increases fast, Shipping industry is prosperous, high-toughness high-strength be welded into development priority, electro-gas (enclosed) welding has very large development space as a kind of efficient welding method.But usually there is the situation of welding mechanics unstable properties in the welding wire researched and produced at present within Chinese territory, processing performance can not meet the high demand of electro-gas (enclosed) welding.
Use substantially all dependence on import of current all electro-gas (enclosed) welding flux-cored wires, market is monopolized by major company of developed country, makes electro-gas (enclosed) welding with high costs, is unfavorable for popularizing.But along with the development of China's Shipbuilding Industry and oil reserve industry, the electro-gas (enclosed) welding welding wire low in the urgent need to a kind of cost, welding mechanics is effective.
Summary of the invention
The present invention passes through organic assembly of drug core component and coordinates with mild steel crust, a kind of welding technological properties and the good electro-gas (enclosed) welding flux-cored wire of physicochemical property are provided, arc stability is good, splash less, flue dust is little, de-slag easily, the forming of weld seam positive and negative, restarting is functional, meets the high demanding criteria of electro-gas (enclosed) welding completely.
For realizing the object of the invention, the technical solution used in the present invention is as follows:
A kind of high tenacity flux-cored wire for electrogas arc welding, comprise mild steel crust and medicine core, it is characterized in that, in described medicine core, each component is with the weight percent meter of whole welding wire, is respectively:
CaF
2：0.50-0.65%；
Sodium carbonate: 0.40-0.60%;
Potassium-containing compound: 0.10-0.25%;
Aluminium (Al) powder: 0.10-0.20%;
Molybdenum-iron powder: 0.10-0.30%;
Electrolytic manganese: 1.5-3.0%;
Ferrosilicon: 0.60-0.75%;
Quartz sand: 0.10-0.15%;
Ferrotianium: 0.6-0.8%;
Aluminium oxide: 0.10-0.15%;
Iron powder: 15-20%;
The filling rate of described medicine core is 19.1-26.85%.
Further, described mild steel crust comprises following component, with the weight percent meter of whole welding wire, is respectively:
C：0.01-0.10%；
Mn：0.1-0.4%；
Si：0.01-0.03%；
S：0.005-0.015%；
P：0.005-0.015%；
Surplus is iron.
Preferably, the diameter of described flux-cored wire is 1.6mm.
Preferably, described flux cored filler rate is 20-25%.
Prepare the method for high tenacity flux-cored wire for electrogas arc welding recited above, it is characterized in that, adopt following steps: after components in certain proportion each in medicine core being mixed, medicine core is placed on mild steel crust, through wrapping up or rolling into silk, be then carefully pulled to dimension and namely obtain described high tenacity flux-cored wire for electrogas arc welding.
Preferably, in described medicine core component, potassium-containing compound is potassic feldspar or potash, or both combinations; When potassium-containing compound is potash, its weight accounts for the 0.12-0.17% of whole welding wire weight.
Preferably, in described medicine core component percentage by weight, CaF
2: sodium carbonate=5:4, electrolytic manganese: ferrosilicon=4:1.
Preferably, the welding parameter of described high tenacity flux-cored wire for electrogas arc welding in vertical electro-gas is: voltage range is between 32 ~ 41V, and current range is 340 ~ 410A.
Preferably, the bevel angle of described high tenacity flux-cored wire for electrogas arc welding welding requirements in vertical electro-gas is 22.5 DEG C, and underside groove gap is 5 ± 1mm, frontal clearance 17 ± 1mm.
The function and mechanism of each component in the present invention:
Electrolytic manganese: manganese is important deoxidier is also simultaneously the important alloying constituent of weld metal.Intensity and the toughness of Resistance of Weld Metal have material impact.Manganese can reduce austenite to ferrite transformation temperature, promotes AF(acicular ferrite) formed; Fe content increase can improve the low-temperature impact toughness of weld seam, but then contrary time too high, and in addition, manganese can also form MnS with sulphur, reduces the impurity content of weld seam.Mn can reduce the sulfur content in weld metal effectively, adds the low-temperature flexibility that can improve weld metal therefore in right amount, improves intensity simultaneously.Mn adds with the form of electrolytic manganese in the present invention, accounts for the total weight percent 1.5-3.0% of welding wire.Add and intensity too much can be caused to raise, impact value reduces.
Ferrosilicon: the alloying constituent that silicon to be important deoxidier be also simultaneously weld metal is important, silicon can reduce the oxygen content of weld metal, improves the impact flexibility of weld metal, but then contrary time too high; Adopt its effect of silicomanganese combined deoxidation better.Si can form mature toughening mechanism with Mn, can play the effect of combined deoxidation simultaneously.Si is mainly derived from ferrosilicon, the good mechanical properties when ferrosilicon percentage by weight is within 0.60-0.75%, and when being greater than 0.75%, its intensity increases, impact toughness decreased.
Aluminium powder: aluminium is strong deoxidier, has important function to the oxygen content controlling weld metal, can also play the effect of stabilising arc simultaneously; But can increase weld fumes during too high levels, the health in welder is unfavorable.
Molybdenum-iron: molybdenum refinement weld metal crystallite dimension, can significantly improve weld metal intensity, but too highly can affect weld metal toughness.In order to control the molybdenum content being transitioned into weld metal, be mainly derived from molybdenum-iron.Mo can significantly improve weld metal intensity, is mainly derived from molybdenum-iron.Molybdenum-iron accounts for the 0.1-0.3% of welding wire gross weight.But be greater than 0.3% and can affect weld metal toughness, little to its intensity effect when being less than 0.1%.The appropriate increase of Mo is for the useful effect of the raising of weld metal ballistic work.
Fluoride: fluorine is in order to reduce the content of Diffusible Hydrogen In Deposited Metal, but content of fluoride is too high, during welding, electric arc is unstable, splashing becomes large, arcing sounds is deteriorated, and is mainly derived from calcirm-fluoride, prodan, potassium fluosilicate or oryolite.Fluoride can strengthen blow force of arc, improves arc stability.Contribute to improving porosity resistance ability simultaneously, reduce diffusible hydrogen content, be conducive to the enhancing of weld seam low-temperature flexibility.In the present invention, fluoride is with CaF
2form exists.Work as CaF
2weight ratio is when 0.5-0.65%, and its processing performance is good, beautiful appearance, and when ratio is less than 0.5%, smog is less, appearance of weld is poor, slag skewness; When ratio is greater than 0.65%, smog is comparatively large, appearance of weld is poor, welding arc is unstable.
Iron powder: add iron powder in medicine core and can improve welding efficiency and provide a small amount of oxygen for stabilising arc, in order to ensure high deposition efficiency, be mainly derived from reduced iron powder or atomized iron powder.
SiO
2be a kind of acidic materials, reduce basicity, anti-pore ability can be affected, SiO
2participate in slag making, adjust the freezing point of slag, surface tension and cinder high-temperature viscosity, the control that butt welded seam is shaped is extremely important.
Al
2o
3be high-melting-point substances, use in formula, improve the raising slag temperature of slag surface tension force, play and improve appearance of weld and play a part stabilising arc, slag making.
Potassium-containing compound: K
2the low degree of ionization oxide of O, occasionally can provide electronics, play the effect of stable arc, improves welding technological properties.
Sodium carbonate: Na
2the low degree of ionization oxide of O, occasionally can provide electronics, with K
2o combines the effect playing better stable arc, improves welding technological properties.
Ti iron: Ti energy thinning weld metal structure, ensures that weld metal obtains acicular ferrite structure, ensures that deposited metals obtains good mechanical property.
The invention provides a kind of high tenacity flux-cored wire for electrogas arc welding, beneficial effect is as follows:
One, the present invention adopts CaF
2-SiO
2and and K
2o, Al
2o
3,na
2o, SiO
2and TiO
2acting in conjunction, obtain a kind of lower-cost electro-gas (enclosed) welding flux-cored wire, its welding technological properties is good, arc stability is good, splash less, flue dust is little, de-slag easily, the forming of weld seam positive and negative, restarting is functional, meets the high demanding criteria of electro-gas (enclosed) welding completely.
Two, the invention provides a kind of high tenacity flux-cored wire for electrogas arc welding, in medicine core component, adopt Mo-Ti alloy system, ensure that welding wire has good mechanical property, Toughness of Deposited Metal is good, tensile strength is greater than 580MPa, and percentage elongation is greater than 25%, and-20 DEG C of impact absorbing energy reach 80J.
Three, the invention provides a kind of high tenacity flux-cored wire for electrogas arc welding, there is in the deposited metal after welding ultralow S, P content (S, P total amount is less than 0.025), reduce the possibility that welding wire deposited metal produces solidification cracking.
Specific embodiments
Embodiment 1
Adopt carbon steel steel band as the crust of welding wire, C:0.01-0.1wt%, Mn:0.1-0.4wt%, Si:0.01-0.03wt%, S:0.005-0.015wt%, P:0.005-0.015wt%, surplus is the metal sheath of mild steel strip as welding wire of iron; 100Kg welding wire is produced to prepare, the present embodiment medicine core accounts for the heavy 21.65wt% of whole welding wire, in medicine core, each composition is: calcirm-fluoride: 0.6Kg, sodium carbonate: 0.45Kg, potassic feldspar: 0.2Kg, aluminium (Al) powder: 0.10Kg, molybdenum-iron powder: 0.3Kg, electrolytic manganese: 1.6Kg, ferrosilicon: 0.6Kg, quartz sand: 0.1Kg, ferrotianium: 0.7Kg, aluminium oxide: 0.1Kg, iron powder: 16.9Kg, to medicine core batching gross weight 21.65Kg; Then composition each in medicine core is mixed rear stand-by.
Steel band is placed in welding wire forming machine, stand-by medicine core compound is injected laterally be bent in the steel band groove of " U " type successively, and then roll into silk, through being carefully pulled to ￠ 1.6mm.
The present embodiment welding parameter: I=340-350A, U=32-33V, gas flow 25L/min, employing CO
2gas shield, CO
2gas purity more than 99.98%, its welding wire deposited metal composition is in table 1, and deposited metal mechanical property is in table 2:
Table 1 deposited metal composition (wt%)
Table 2 deposited metal mechanical property
Diffusible hydrogen content: 4.5mL/100g.
Embodiment 2
The crust of welding wire is identical with embodiment 1,100Kg welding wire is produced to prepare, the present embodiment medicine core accounts for the heavy 22.85wt% of whole welding wire, in medicine core, each composition is: calcirm-fluoride: 0.6Kg, sodium carbonate: 0.45Kg, potassic feldspar: 0.2Kg, aluminium (Al) powder: 0.10Kg, molybdenum-iron powder: 0.3Kg, electrolytic manganese: 1.7Kg, ferrosilicon: 0.6Kg, quartz sand: 0.1Kg, ferrotianium: 0.70Kg, aluminium oxide: 0.1Kg, iron powder: 18Kg, to medicine core batching gross weight 22.85Kg; All the other are identical with embodiment 1, and its welding wire deposited metal composition is in table 3, and deposited metal mechanical property is in table 4:
Table 3 deposited metal composition (wt%)
Table 4 deposited metal mechanical performance
Diffusible hydrogen content: 3.9mL/100g.
Embodiment 3
The crust of welding wire is identical with embodiment 1,100Kg welding wire is produced to prepare, the present embodiment medicine core accounts for the heavy 24.15wt% of whole welding wire, in medicine core, each composition is: calcirm-fluoride: 0.6Kg, sodium carbonate: 0.45Kg, potassic feldspar: 0.2Kg, aluminium (Al) powder: 0.20Kg, molybdenum-iron powder: 0.3Kg, electrolytic manganese: 1.9Kg, ferrosilicon: 0.6Kg, quartz sand: 0.1Kg, ferrotianium: 0.7Kg, aluminium oxide: 0.1Kg, iron powder: 19Kg, to medicine core batching gross weight 24.15Kg; Then composition each in medicine core is mixed rear stand-by.
Steel band to be placed in welding wire forming machine, stand-by medicine core compound to be injected laterally be bent in the steel band groove of " U " type successively, and then roll into silk, through being carefully pulled to ￠ 1.6mm.
The present embodiment welding parameter: I=370-380A, U=37-38V, gas flow 30L/min, employing CO
2gas shield, CO
2gas purity more than 99.98%.Its welding wire deposited metal composition is in table 5, and deposited metal mechanical property is in table 6:
Table 5 deposited metal composition (wt%)
Table 6 deposited metal mechanical performance
Diffusible hydrogen content: 3.5mL/100g.
Above-mentioned medicinal powder all needs after low temperature is baked and banked up with earth, and is stirred by V-mixer.
Above example; object of the present invention, technical scheme and corresponding effect thereof are illustrated; be understood that; the foregoing is only the instantiation that the present invention lifts; be not limited to the present invention; every within application claims, any amendment, replacement, improvement etc. made all belong within protection authority of the present invention.
Claims (9)
1. a high tenacity flux-cored wire for electrogas arc welding, comprises mild steel crust and medicine core, it is characterized in that, in described medicine core, each component is with the weight percent meter of whole welding wire, is respectively:
CaF
2：0.50-0.65%；
Sodium carbonate: 0.40-0.60%;
Potassium-containing compound: 0.10-0.25%;
Aluminium (Al) powder: 0.10-0.20%;
Molybdenum-iron powder: 0.10-0.30%;
Electrolytic manganese: 1.5-3.0%;
Ferrosilicon: 0.60-0.75%;
Quartz sand: 0.10-0.15%;
Ferrotianium: 0.6-0.8%;
Aluminium oxide: 0.10-0.15%;
Iron powder: 15-20%;
The filling rate of described medicine core is 19.10-26.85%.
2. high tenacity flux-cored wire for electrogas arc welding according to claim 1, is characterized in that: described mild steel crust comprises following component, with the weight percent meter of whole welding wire, is respectively:
C：0.01-0.10%；
Mn：0.1-0.4%；
Si：0.01-0.03%；
S：0.005-0.015%；
P：0.005-0.015%；
Surplus is iron.
3. high tenacity flux-cored wire for electrogas arc welding according to claim 1, is characterized in that: the diameter of flux-cored wire is 1.6mm.
4. according to high tenacity flux-cored wire for electrogas arc welding described in claim 1, it is characterized in that: described flux cored filler rate is 20-25%.
5. according to high tenacity flux-cored wire for electrogas arc welding described in claim 1, it is characterized in that: in described medicine core component, potassium-containing compound is potassic feldspar or potash, or both combinations; When potassium-containing compound is potash, its weight accounts for the 0.12-0.17% of whole welding wire weight.
6. according to high tenacity flux-cored wire for electrogas arc welding described in claim 1, it is characterized in that: in described medicine core component percentage by weight, CaF
2: sodium carbonate=5:4, electrolytic manganese: ferrosilicon=4:1.
7. prepare the method for high tenacity flux-cored wire for electrogas arc welding described in any one of claim 1-6, it is characterized in that, adopt following steps: after components in certain proportion each in medicine core being mixed, medicine core is placed on mild steel crust, through wrapping up or rolling into silk, be then carefully pulled to dimension and namely obtain described high tenacity flux-cored wire for electrogas arc welding.
8. according to the application of high tenacity flux-cored wire for electrogas arc welding in welding described in any one of claim 1-6, it is characterized in that: the welding parameter of described high tenacity flux-cored wire for electrogas arc welding in vertical electro-gas is: voltage range is between 32 ~ 41V, and current range is 340 ~ 410A.
9. according to the application of high tenacity flux-cored wire for electrogas arc welding in welding described in any one of claim 1-6, it is characterized in that: the bevel angle of described high tenacity flux-cored wire for electrogas arc welding welding requirements in vertical electro-gas is 22.5 DEG C, underside groove gap is 5 ± 1mm, frontal clearance 17 ± 1mm.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105269176B (en) * | 2015-11-20 | 2017-12-12 | 四川大西洋焊接材料股份有限公司 | Gas shielded flux cored wire for the steel of resistance to cargo tank corrosion and preparation method thereof |
| CN105234588B (en) * | 2015-11-20 | 2018-01-16 | 四川大西洋焊接材料股份有限公司 | Corrosion-resistant matched high tenacity electro-gas (enclosed) welding flux-cored wire of COT steel and preparation method thereof |
| CN106695155A (en) * | 2016-12-14 | 2017-05-24 | 安徽华众焊业有限公司 | Low-hydrogen high toughness acidic flux-cored wire |
| CN106736001A (en) * | 2016-12-14 | 2017-05-31 | 安徽华众焊业有限公司 | High tenacity flux-cored wire for electrogas arc welding |
| CN107009053A (en) * | 2017-05-19 | 2017-08-04 | 哈焊所华通（常州）焊业股份有限公司 | A kind of self-protection flux-cored wire of thin diameter for thin plate |
| JP7244322B2 (en) * | 2019-03-25 | 2023-03-22 | 日鉄溶接工業株式会社 | Flux-cored wire for electrogas arc welding |
| CN111761175A (en) * | 2020-06-19 | 2020-10-13 | 武汉钢铁有限公司 | Efficient gas-slag combined shielded welding method for thick plates |
| CN112872653A (en) * | 2021-02-04 | 2021-06-01 | 苏州鑫之泰焊接材料有限公司 | Stainless steel flux-cored wire without gas protection and preparation method thereof |
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| CN104148824A (en) | 2014-11-19 |
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