CN103962746A - Gas shield flux-cored wire for electric arc welding - Google Patents

Gas shield flux-cored wire for electric arc welding Download PDF

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Publication number
CN103962746A
CN103962746A CN201410192425.7A CN201410192425A CN103962746A CN 103962746 A CN103962746 A CN 103962746A CN 201410192425 A CN201410192425 A CN 201410192425A CN 103962746 A CN103962746 A CN 103962746A
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CN
China
Prior art keywords
cored wire
welding
flux
gas shield
percentage composition
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Granted
Application number
CN201410192425.7A
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Chinese (zh)
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CN103962746B (en
Inventor
王凯
易江龙
郑世达
陈和兴
郭春富
刘凤美
闫德俊
马凯夫
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Guangdong Institute Of Welding Technology (guangdong Institute Of China And Ukraine)
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广东省工业技术研究院(广州有色金属研究院)
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Priority to CN201410192425.7A priority Critical patent/CN103962746B/en
Publication of CN103962746A publication Critical patent/CN103962746A/en
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Classifications

    • 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
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0266—Rods, electrodes, wires flux-cored
    • 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
    • B23K35/3601—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 with inorganic compounds as principal constituents
    • B23K35/3608—Titania or titanates
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding
    • B23K35/406—Filled tubular wire or rods

Abstract

A gas shield flux-cored wire for electric arc welding is characterized by comprising, by mass, 20% to 22% of TiO2, 1% to 4% of SiO2, 1% to 2.5% of ZrO2, 1% to 3% of Al2O3, 1.5% of MgO, 5% to 9% of AlF3, 5% to 6% of NiF2, 1% to 6% of Na2SiF6, 3% to 4% of Ti3Al, 4% to 6% of Fe3Al, 1% to 2% of Co and the balance Fe. The flux-cored wire has the excellent processing properties that the content of weld metal diffusible hydrogen is low, splashing is small, the defects of gas holes and cracks are fewer, a welded joint has good low temperature impact toughness and corrosion resisting property, and the gas shield flux-cored wire is particularly suitable for welding of high strength steel with the yield strength of 700 MPa in the ocean engineering equipment manufacturing industry.

Description

A kind of arc welding gas shielded flux cored wire
Technical field
The present invention relates to the gas shielded flux cored wire that a kind of arc welding is used, the flux-cored wire that particularly a kind of steel arc welding of high intensity levels is used.
Background technology
Flux-cored wire is efficient and high-performance welding material as a new generation, has advantages of that processing performance is good, deposition rate is fast, production efficiency is high, is widely used in the welding field that each industrialization is manufactured, and its consumption is the highest in shipbuilding and marine engineering product manufacture field.Most flux-cored wire is to use rutile as main slag moulding material, becomes rutile slag system flux-cored wire, has forming, easily de-slag and the advantage such as little of splashing, and can realize horizontal, upper to, lower to, stand to etc. the welding of full position.The flux-cored wire that can realize at present all-position welding mostly belongs to rutile slag system, but the Ti in rutile slag system flux-cored wire can be transitioned in deposited metal in the time of welding, reduce the low-temperature impact toughness of welding point, on high-strength steel, welding brings totally unfavorable impact for this.And on the contrary as main basic slag system flux-cored wire taking alkali metal oxide, the weld metal of its welding fabrication has good mechanical property, but because it very easily forms long slag, is difficult to realize all-position welding.Therefore; be necessary on the basis of rutile slag system and basic slag system; design and optimization of C/C composites in conjunction with the advantage of two kinds of slag systems; both can realize all-position welding; the low-temperature impact toughness that can significantly promote again weld metal, realization can realize the high-performance gas-shielded flux-cored wire that high-strength steel all-position welding is used.
CN101623799A discloses a kind of flux-cored wire for gas shielded arc welding for creep of TiO 2 series, and it is optimized for rutile slag system flux-cored wire, contains TiO 2, Al 2o 3, SiO 2and ZrO 2deng metal monomer or alloys such as oxide and Mn, Si, Mg, Na and K, all the other are filled for iron powder, can be used for the vertical upwards weldering of high welding current, can obtain the welding point with good mechanical properties.But in its application example, its yield strength evaluation of estimate only has 620MPa, cannot realize extra large frock and prepare the welding of making middle 700MPa grade high-strength steel.
CN102785041A discloses a kind of full position alkaline gas protection flux-cored wire, and it adopts CaO, MgO, K 2o and Na 2the oxides such as O, CaF 2, LiF 2, SrF 2and BaF 2in fluoride, and the alloying element such as almag, manganese and silicon, all the other are filled for iron powder is all stronger flux-cored wires of a kind of impact flexibility and cracking resistance; Can only reach 430MPa but its yield strength is the highest, cannot meet equally extra large frock and prepare the welding of making middle 700MPa grade high-strength steel.
CN102655978A discloses a kind of coat core-wire for gas-protection arc welding that can all-position welding, and this welding wire forms and mainly contains CaO, MgF 2, CaF 2, SrF 2, the oxide such as BaF, the metals such as Si, Al, Ti, Mg, Zr, Ca, SiO 2, MnO, Al 2o 3, TiO 2deng metal oxide, surplus is Fe and arc stabilizer etc.This welding wire can be realized all-position welding, welding bead forms well, and weld defect is good, but there is no the detection of low-temperature impact toughness, only welding metal oxide content is controlled, therefore cannot be judged low-temperature impact toughness and the corrosion proof quality of its welding point.
Marine engineering equipment except possessing the characteristic of high strength and high tenacity, also must possess good seawater corrosion resistance characteristic with steel.Existing flux-cored wire can only be served as a kind of efficient welding material of normal steels, still can not meet the welding requirements of extra large work steel completely.
Summary of the invention
For overcoming the weak point of rutile slag system and basic slag system flux-cored wire, the object of this invention is to provide the welding gas shielded flux cored wire that a kind of impact flexibility is good.
Flux-cored wire of the present invention comprises following component and quality percentage composition: TiO 220 ~ 22%, SiO 21 ~ 4%, ZrO 21 ~ 2.5%, Al 2o 31 ~ 3%, MgO 1.5%, AlF 35 ~ 9%, NiF 25 ~ 6%, Na 2siF 61 ~ 6%, Ti 3al 3 ~ 4%, Fe 3al4 ~ 6%, Co1 ~ 2%, surplus is Fe.
Flux-cored wire of the present invention also contains the Cu 0.1% of quality percentage composition.
Flux-cored wire of the present invention also contains the Ce 0.1% of quality percentage composition.
Flux-cored wire of the present invention also contains the Nd 0.1% of quality percentage composition.
Flux-cored wire of the present invention also contains the Sm 0.1% of quality percentage composition.
Flux-cored wire of the present invention also contains the Gd 0.1% of quality percentage composition.
Medicine core powder of the present invention is by slag former TiO 2, SiO 2, ZrO 2, Al 2o 3, MgO, AlF 3and NiF 2, arc stabilizer Na 2siF 6with deoxidier Ti 3al and Fe 3al, and iron powder.Evenly mix according to content of the present invention, sintering is packed into welding wire after drying.Medicine core powder accounts for 16 ~ 24% of whole flux-cored wire gross weight, is defined as in the industry medicinal powder filling rate, and filling rate height can directly affect the welding effect of welding wire, and the too high filling medicinal powder that causes overflows, and the too low medicinal powder deficiency that causes causes welding technological properties to reduce.Result of the test shows, suitable TiO 2content is 20 ~ 22% of medicinal powder weight, if TiO 2content exceedes 22% and can make slag fusing point too high, easily forms the slag phenomenon of uniting, and causes de-slag difficulty; If TiO 2content lower than 20% time, makes slag fusing point too low, can dilute deposited metal, causes it to flow to weld seam both sides, causes cladding incomplete.SiO 2content is at 1 ~ 4%, ZrO 2content is at 1 ~ 2.5%, Al 2o 3content is 1 ~ 3% time, and slag spreadability is good, if further improve its content, can cause cladding variation.Slag former AlF 3and NiF 2content and TiO 2should remain between 0.5 ~ 1 Deng oxide ratio.Test shows, adds two kinds of fluorides than adding separately AlF 3all-position welding performance good, splash and flue dust also can be improved accordingly.AlF 3content general control between 5 ~ 9%, can with oxygen generation exothermic reaction, the heat that discharges of reaction can make viscous slag be transformed into caducous dryness slag, obviously improves deslag performance; But too high levels can cause deposited incomplete.NiF 2have the effect that improves the droplet transfer, wherein Ni element also can play the effect of further lifting impact flexibility, but when its too high levels, will cause weld fumes to increase and pore increases, and optimum content should remain between 5 ~ 6%.Arc stabilizer Na 2siF 6add and can play the further effect that improves deslag performance, its content should be controlled at 4%.Deoxidier in medicinal powder is Ti 3al and Fe 3al intermetallic compound, the oxygen easily and in deposited metal interacts, and plays the effect of deoxidation, degasification and weakens CO 2the effect of protective gas oxidation atmosphere, this interacts as exothermic reaction, can effectively supplement CO 2gas issues at high-temperature electric arc the heat that raw decomposition reaction absorbs, and reduces the cooling velocity of molten pool metal, reduces pore and produces probability, utilizes pure CO thereby realize 2as protective gas, effectively reduce welding cost.In addition Ti 3al and Fe 3the peculiar DO3 sublattice of Al intermetallic compound structure, wherein Ti 3al plays inducing catalysis effect, makes Ni will occupy Fe 3the position of Fe atom in Al structure, Ti by near and occupy the arest neighbors position of Al atom, form Ni 3(TiAl) precipitation phase, produces distorting stress and forms APB strengthening, makes the mobile of dislocation need larger external force, thereby hinders dislocation motion, improves yield strength and the impact flexibility of weld metal.But work as Ti 3al and Fe 3when Al too high levels, easily separate out too much Al 2o 3cause deposited metal mobility to reduce, its proper ratio is 7 ~ 10%.Add appropriate Co, can stop separating out of carbide, crystal grain thinning, reduces the sensitive property of impact, thereby improves the low-temperature impact toughness of weld seam, and its appropriate level is 1 ~ 2%, and too low malleableize effect is bad, too highly easily separates out at crystal boundary.In medicinal powder, also can add the rare earth elements such as Cu, Ce, Nd, Sm and Gd, its mass ratio is no more than 0.5% of medicinal powder gross weight, the corrosion resistance that result of study shows to be conducive to refinement seam organization adding of these elements and improves weld metal.
Innovation of the present invention is: the present invention adopts the advantage of rutile slag system and basic slag system, adopts Fe 3al and Ti 3al is as deoxidier, can realize all-position welding, purify and strengthen welds metal, reduce its diffusible hydrogen and oxide slag inclusion content, obtain excellent low-temperature impact toughness and corrosion resistance, there is little, the good welding technological properties such as crackle is few and weld fumes is low that splashes.Fe 3al and Ti 3al also can use pure CO as deoxidier 2as protective gas; Add NiF 2can make weld seam obtain excellent corrosion resisting property, being particularly suitable for yield strength in marine engineering equipment manufacture field is the pure CO of 700MPa rank steel 2gas shielded arc welding.
specific implementation method
TiO of the present invention 2through 500 ~ 600 DEG C of sintering processes, all the other components are after 100 ~ 300 DEG C of bakings are processed, more evenly mixing, add in welding wire according to 16 ~ 24% filling rate.Welding wire is with cold-rolled low carbon steel band as crust, and cross sectional shape is the docking of O type or overlap joint, and steel band is rolled into after semicircular arc, then fills the above-mentioned medicine core powder mixing, sealing moulding, then pass through multiple tracks drawing procedure, final tube reducing to 1.0 ~ 1.2mm diameter.
Use the preheat temperature of flux-cored wire of the present invention should be controlled at 120 ~ 180 DEG C (ISO 18276-A), but when the carbon content of welding base metal metal is lower than 1% time, ground floor welding bead does not need to carry out the pre-heat treatment, and remaining welding bead when welding, mother metal temperature must not be higher than 180 DEG C.If interlayer temperature exceedes this numerical value, should place and be cooled to 120 ~ 180 DEG C and can weld.
Embodiment
Table 1 is flux-cored wire component of the present invention and quality percentage composition.
Table 1 flux-cored wire component and quality percentage composition (%)
Embodiment TiO 2 SiO 2 ZrO 2 Al 2O 3 MgO AlF 3 NiF 2 Na 2SiF 6
1 20 4 2.5 2 1.5 8 6 4
2 20 4 2.5 3 1.5 8 6 4
3 22 3 2 1.5 1.5 9 5 4
4 22 3 2 2.5 1.5 9 5 4
Embodiment Ti 3Al Fe 3Al Co Cu Ce Nd Sm Gd
1 4 4 1.7 0.1 0.1 0.1 - -
2 3 5 1 - - - - -
3 4 5.8 1.9 0.1 - - 0.1 0.1
4 3 6 2 - - - - -
Test material is ASTM A514 Low-alloy High-strength Steel, and test plate (panel) is of a size of 300 × 150 × 14mm.According to " material and the welding conditions " of CCS, processing single V groove with root face, adopts multi-pass welding welding mode, and after the positive complete back gouging of surface build-up welding, weldering together, adopts no pulse constant voltage power supply DC reverse connection.Prepare welding point V-notch impact specimen according to CCS " material and welding conditions ".Impact specimen is of a size of 10 × 10 × 55mm, and gap position is positioned at weld seam center, and test temperature is 40 DEG C of ﹣.The welding condition of each welding position is as shown in table 2, for welding wire of the present invention, except pure CO 2outside other protective gas (as Ar+20%CO 2, He etc.) also can meet user demand.Result of the test shows, all formulas all can be realized all-position welding.
Table 2 welding condition
Table 3 has provided method and standard that the prepared property of welded joint of employing embodiment 1 ~ 4 flux-cored wire is evaluated, respectively organizes the performance of flux-cored wire for overall merit.
Testing result shows, embodiment 1 ~ 4 appearance of weld is good, and weld defect, splash generation, flue dust generation and deslag performance are qualified.
It is as shown in table 4 that mechanical performance, corrosion resistance and the diffusible hydrogen content of embodiment 1 ~ 4 detects data, and 1 ~ 4 all has good mechanical performance and qualified diffusible hydrogen content, and wherein 1 and 3 have good corrosion resistance.
Table 3 property of welded joint assessment method and standard
Table 4 mechanical performance, corrosion resistance and diffusible hydrogen content test result.
On the content that related personnel can describe in above invention and basis, make various changes, but these changes still belong to category of the present invention.

Claims (7)

1. an arc welding gas shielded flux cored wire, is characterized in that comprising following component and quality percentage composition: TiO 220 ~ 22%, SiO 21 ~ 4%, ZrO 21 ~ 2.5%, Al 2o 31 ~ 3%, MgO 1.5%, AlF 35 ~ 9%, NiF 25 ~ 6%, Na 2siF 61 ~ 6%, Ti 3al 3 ~ 4%, Fe 3al4 ~ 6%, Co1 ~ 2%, surplus is Fe.
2. gas shielded flux cored wire according to claim 1, is characterized in that the Cu 0.1% that contains quality percentage composition.
3. gas shielded flux cored wire according to claim 1, is characterized in that the Ce 0.1% that contains quality percentage composition.
4. gas shielded flux cored wire according to claim 1, is characterized in that the Nd 0.1% that contains quality percentage composition.
5. gas shielded flux cored wire according to claim 1, is characterized in that the Sm 0.1% that contains quality percentage composition.
6. gas shielded flux cored wire according to claim 1, is characterized in that the Gd 0.1% that contains quality percentage composition.
7. gas shielded flux cored wire according to claim 1, is characterized in that Na 2siF 6quality percentage composition be 4%.
CN201410192425.7A 2014-05-08 2014-05-08 A kind of arc welding gas shielded flux cored wire Expired - Fee Related CN103962746B (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107252992A (en) * 2017-05-09 2017-10-17 安徽飞弧焊业股份有限公司 A kind of pipe line steel self-protection flux-cored wire
CN109014657A (en) * 2018-09-13 2018-12-18 郑州凤凰新材料科技有限公司 A kind of High Speed Welding sintered flux and preparation method thereof
DE102018207448A1 (en) * 2018-05-15 2019-11-21 MTU Aero Engines AG Method for producing a welding wire, welding wire for machining a component and component
CN112872651A (en) * 2021-01-26 2021-06-01 华能国际电力股份有限公司 Flux core, preparation method of flux core, flux-cored wire and welding method
CN113441876A (en) * 2021-07-20 2021-09-28 桂林航天工业学院 Gas shielded flux-cored wire for pressure vessel and preparation method thereof
CN113631322A (en) * 2019-05-09 2021-11-09 株式会社神户制钢所 Flux-cored wire, welding method, and weld metal

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CN1117902A (en) * 1994-08-30 1996-03-06 天津大学 Titanium-type gas shielded flux-cored welding stick
US20020003135A1 (en) * 2000-05-01 2002-01-10 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Flux-cored wire for gas-shielded Arc welding of heat resisting steel
JP2009119497A (en) * 2007-11-15 2009-06-04 Nippon Steel & Sumikin Welding Co Ltd Flux-cored wire for self-shielded arc welding for fire resistant steel
CN101623799A (en) * 2008-07-09 2010-01-13 株式会社神户制钢所 Flux-cored wire for titanic oxide gas shielded arc welding
CN101804533A (en) * 2010-04-27 2010-08-18 上海林肯电气有限公司 Gas shielded flux-cored wire for welding with low temperature, high toughness and full positions
CN102430877A (en) * 2011-11-04 2012-05-02 武汉铁锚焊接材料股份有限公司 Metal powder type flux-cored wire and preparation and application thereof
CN102785041A (en) * 2011-05-17 2012-11-21 天津雷公焊接材料有限公司 All-position flux-cored wire for alkaline gas protection

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1117902A (en) * 1994-08-30 1996-03-06 天津大学 Titanium-type gas shielded flux-cored welding stick
US20020003135A1 (en) * 2000-05-01 2002-01-10 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Flux-cored wire for gas-shielded Arc welding of heat resisting steel
JP2009119497A (en) * 2007-11-15 2009-06-04 Nippon Steel & Sumikin Welding Co Ltd Flux-cored wire for self-shielded arc welding for fire resistant steel
CN101623799A (en) * 2008-07-09 2010-01-13 株式会社神户制钢所 Flux-cored wire for titanic oxide gas shielded arc welding
CN101804533A (en) * 2010-04-27 2010-08-18 上海林肯电气有限公司 Gas shielded flux-cored wire for welding with low temperature, high toughness and full positions
CN102785041A (en) * 2011-05-17 2012-11-21 天津雷公焊接材料有限公司 All-position flux-cored wire for alkaline gas protection
CN102430877A (en) * 2011-11-04 2012-05-02 武汉铁锚焊接材料股份有限公司 Metal powder type flux-cored wire and preparation and application thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107252992A (en) * 2017-05-09 2017-10-17 安徽飞弧焊业股份有限公司 A kind of pipe line steel self-protection flux-cored wire
DE102018207448A1 (en) * 2018-05-15 2019-11-21 MTU Aero Engines AG Method for producing a welding wire, welding wire for machining a component and component
WO2019219104A1 (en) * 2018-05-15 2019-11-21 MTU Aero Engines AG Method for producing a welding wire, welding wire for processing a component, and component
CN109014657A (en) * 2018-09-13 2018-12-18 郑州凤凰新材料科技有限公司 A kind of High Speed Welding sintered flux and preparation method thereof
CN113631322A (en) * 2019-05-09 2021-11-09 株式会社神户制钢所 Flux-cored wire, welding method, and weld metal
CN113631322B (en) * 2019-05-09 2023-11-14 株式会社神户制钢所 Flux-cored wire, welding method and weld metal
CN112872651A (en) * 2021-01-26 2021-06-01 华能国际电力股份有限公司 Flux core, preparation method of flux core, flux-cored wire and welding method
CN112872651B (en) * 2021-01-26 2022-08-02 华能国际电力股份有限公司 Flux core, preparation method of flux core, flux-cored wire and welding method
CN113441876A (en) * 2021-07-20 2021-09-28 桂林航天工业学院 Gas shielded flux-cored wire for pressure vessel and preparation method thereof

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