CN103962746B - A kind of arc welding gas shielded flux cored wire - Google Patents
A kind of arc welding gas shielded flux cored wire Download PDFInfo
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- CN103962746B CN103962746B CN201410192425.7A CN201410192425A CN103962746B CN 103962746 B CN103962746 B CN 103962746B CN 201410192425 A CN201410192425 A CN 201410192425A CN 103962746 B CN103962746 B CN 103962746B
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- cored wire
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- gas shielded
- flux
- flux cored
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Classifications
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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
- B23K35/02—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 kind of arc welding gas shielded flux cored wire, is characterized in that medicated core composition includes following component and weight/mass percentage composition: TiO2?20~22%��SiO21~4%��ZrO21~2.5%��Al2O31 ~ 3%, MgO? 1.5%, AlF35~9%��NiF25~6%��Na2SiF61~6%��Ti3Al? 3 ~ 4%, Fe3Al4~6%��Co1 ~ 2%, surplus is Fe. The flux-cored wire of the present invention, there is weld metal diffusible hydrogen content low, the excellent processing performance that the defects such as little, pore crackle of splashing are few, welding point has the corrosion resisting property of excellent low-temperature impact toughness and excellence, and being particularly suited in marine engineering equipment manufacturing yield strength is the welding of 700MPa level high-strength steel.
Description
Technical field
The present invention relates to the gas shielded flux cored wire of a kind of arc welding, particularly to the flux-cored wire of the steel arc welding of a kind of high intensity levels.
Background technology
Flux-cored wire is efficient and high-performance welding material as a new generation, has the advantage that processing performance is good, deposition rate is fast, production efficiency is high, is widely used in the welding field that each industrialization manufactures, and its consumption is the highest in shipbuilding and marine engineering product manufacture field. Current most of 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 an advantage such as little of splashing, and can realize laterally, on to, lower to, stand to etc. the welding of all positon. The flux-cored wire that can realize all-position welding at present broadly falls into greatly rutile slag system, but the Ti in rutile slag system flux-cored wire can be transitioned in deposited metal when welding, reducing the low-temperature impact toughness of welding point, high-strength steel welding is brought totally unfavorable impact by this. And the basic slag system flux-cored wire based on alkali metal oxide is on the contrary, the weld metal of its welding fabrication has excellent mechanical property, but very easily form long slag due to it, be difficulty with all-position welding. Therefore; it is necessary on the basis of rutile slag system and basic slag system; advantage in conjunction with two kinds of slag systems designs and optimization of C/C composites; both all-position welding can have been realized; can significantly promote again the low-temperature impact toughness of weld metal, it is achieved the high-performance gas-shielded flux-cored wire of high-strength steel all-position welding can be realized.
CN101623799A discloses the flux-cored wire for gas shielded arc welding for creep of a kind of TiO 2 series, and it is optimized for rutile slag system flux-cored wire, containing TiO2��Al2O3��SiO2And ZrO2Deng oxide and metallic monomer or the alloy such as Mn, Si, Mg, Na and K, all the other are filled for iron powder, can be used for the vertical-up welding 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, it is impossible to realize the welding of 700MPa grade high-strength steel in the work equipment manufacturing of sea.
CN102785041A discloses a kind of all positon alkaline gas protection flux-cored wire, and it adopts CaO, MgO, K2O and Na2The oxides such as O, CaF2��LiF2��SrF2And BaF2In fluoride, and the alloying element such as almag, manganese and silicon, all the other are filled for iron powder is a kind of impact flexibility and all stronger flux-cored wire of cracking resistance;But its yield strength only up to reach 430MPa, the welding of 700MPa grade high-strength steel in the work equipment manufacturing of sea cannot be met equally.
CN102655978A disclose a kind of can the coat core-wire for gas-protection arc welding of all-position welding, this welding wire is constituted mainly CaO, MgF2��CaF2��SrF2, the oxide such as BaF, the metal such as Si, Al, Ti, Mg, Zr, Ca, SiO2��MnO��Al2O3��TiO2Deng metal-oxide, surplus is Fe and arc stabilizer etc. This welding wire can realize all-position welding, welding bead is formed well, and weld defect is good, but does not have the detection of low-temperature impact toughness, only welding metal oxide content is controlled, therefore cannot judge the low-temperature impact toughness of its welding point and corrosion proof quality.
Marine engineering equipment steel are except must possessing the characteristic of high intensity and high tenacity, it is necessary to possess excellent seawater corrosion resistance characteristic. Existing flux-cored wire, only as the efficient welding material of a kind of normal steels, still can not fully meet the welding requirements of sea work steel.
Summary of the invention
For overcoming rutile slag system and the weak point of basic slag system flux-cored wire, it is an object of the invention to provide the welding gas shielded flux cored wire that a kind of impact flexibility is excellent.
The flux-cored wire of the present invention includes following component and weight/mass percentage composition: TiO220~22%��SiO21~4%��ZrO21~2.5%��Al2O31~3%��MgO1.5%��AlF35~9%��NiF25~6%��Na2SiF61~6%��Ti3Al3~4%��Fe3Al4 ~ 6%, Co1 ~ 2%, surplus is Fe.
The flux-cored wire of the present invention is possibly together with the Cu0.1% of weight/mass percentage composition.
The flux-cored wire of the present invention is possibly together with the Ce0.1% of weight/mass percentage composition.
The flux-cored wire of the present invention is possibly together with the Nd0.1% of weight/mass percentage composition.
The flux-cored wire of the present invention is possibly together with the Sm0.1% of weight/mass percentage composition.
The flux-cored wire of the present invention is possibly together with the Gd0.1% of weight/mass percentage composition.
The medicated core powder of the present invention is by slag former TiO2��SiO2��ZrO2��Al2O3��MgO��AlF3And NiF2, arc stabilizer Na2SiF6With deoxidizer Ti3Al and Fe3Al, and iron powder. According to the content Homogeneous phase mixing of the present invention, sintering is packed into welding wire after drying. Medicated core powder accounts for the 16 ~ 24% of whole flux-cored wire gross weight, is defined as in the industry medicated powder filling rate, and filling rate height can directly affect the welding effect of welding wire, too high, causes filling medicated powder to overflow, too low, causes medicated powder deficiency to cause welding technological properties to reduce. Result of the test shows, suitable TiO2Content is the 20 ~ 22% of medicated powder weight, if TiO2Content can make slag fusing point too high more than 22%, it is easy to forms slag and unites phenomenon, causes de-slag difficulty; If TiO2When content is lower than 20% so that slag fusing point is too low, deposited metal can be diluted, cause it to flow to weld seam both sides, cause that cladding is incomplete. SiO2Content 1 ~ 4%, ZrO2Content 1 ~ 2.5%, Al2O3Content is when 1 ~ 3%, and slag spreadability is good, if improving its content further, can cause that cladding is deteriorated. Slag former AlF3And NiF2Content and TiO2Should be maintained between 0.5 ~ 1 Deng oxide ratio. Test shows, adds two kinds of fluoride ratios and is individually added into AlF3All-position welding performance good, splash and flue dust also can be improved accordingly. AlF3Content general control between 5 ~ 9%, with oxygen generation exothermic reaction, the heat that discharges can be reacted viscous slag can be made to be transformed into caducous dryness slag, hence it is evident that improve removability of slag energy; But too high levels can cause that deposition is incomplete. NiF2Having the effect improving the droplet transfer, wherein Ni element may also function as the effect promoting impact flexibility further, but during its too high levels, weld fumes will be caused to increase and pore increases, and optimum content should be maintained between 5 ~ 6%.Arc stabilizer Na2SiF6Addition can play improve further the removability of slag can effect, its content should control 4%. Deoxidizer in medicated powder is Ti3Al and Fe3Al intermetallic compound, it is easy to interact with the oxygen in deposited metal, plays deoxidation, the effect of degasification and weakens CO2The effect of protective gas oxidation atmosphere, this interacts is exothermic reaction, can effectively supplement CO2Gas is decomposed under high-temperature electric arc and is reacted the heat absorbed, and reduces the rate of cooling of molten pool metal, reduces pore and produces probability, thus realizing utilizing pure CO2As protective gas, effectively reduce welding cost. In addition Ti3Al and Fe3DO3 sublattice structure, wherein Ti specific to Al intermetallic compound3Al plays inducing catalysis effect so that Ni will occupy Fe3The position of Fe atom in Al structure, Ti will be close to and occupy the arest neighbors position of Al atom, forms Ni3(TiAl) precipitation phase, produces distorting stress and forms APB strengthening so that the external force that the mobile needs of dislocation are bigger, thus hindering dislocation motion, improves yield strength and the impact flexibility of weld metal. But work as Ti3Al and Fe3During Al too high levels, easily precipitate out too much Al2O3Causing deposited metal mobility to reduce, its proper ratio is 7 ~ 10%. Adding appropriate Co, can stop the precipitation of carbide, crystal grain thinning, reduce the sensitive property impacted, thus improving the low-temperature impact toughness of weld seam, its appropriate level is 1 ~ 2%, and too low then toughening effect is bad, too high then easily in crystal boundary precipitation. Also can adding the rare earth elements such as Cu, Ce, Nd, Sm and Gd in medicated powder, its mass ratio is less than the 0.5% of medicated powder gross weight, and result of study shows that being added with of these elements is beneficial to refinement seam organization and improves the corrosion resistance of weld metal.
The innovation of the present invention is in that: the present invention adopts the advantage of rutile slag system and basic slag system, adopts Fe3Al and Ti3Al is as deoxidizer, all-position welding can be realized, purify and strengthening weld metal, reduce its diffusible hydrogen and oxide inclusions content, obtain excellent low-temperature impact toughness and corrosion resistance, the excellent welding technological properties such as have that splashing is little, crackle is few and weld fumes is low. Fe3Al and Ti3Al it be also possible to use pure CO as deoxidizer2As protective gas; Add NiF2Weld seam can be made to obtain excellent corrosion resisting property, and being particularly suitable in marine engineering equipment manufacture field yield strength is the pure CO of 700MPa rank steel2Gas shielded arc welding.
Specific implementation method
The TiO of the present invention2Through 500 ~ 600 DEG C of sintering processes, all the other components are after 100 ~ 300 DEG C of bakings process, then Homogeneous phase mixing, and the filling rate according to 16 ~ 24% adds in welding wire. 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, after steel band is rolled into semicircular arc, is subsequently filled the medicated core powder of above-mentioned mix homogeneously, seals molding, and then through multiple tracks drawing procedure, final tube reducing is to 1.0 ~ 1.2mm diameter.
The preheating temperature using the flux-cored wire of the present invention should control at 120 ~ 180 DEG C (ISO18276-A), but when the carbon content of welding base metal metal is lower than 1%, ground floor welding bead is made without the pre-heat treatment, and during remaining pass weld, mother metal temperature must not be higher than 180 DEG C. If interlayer temperature exceedes this numerical value, it should placement is cooled to 120 ~ 180 DEG C and can weld.
Embodiment
Table 1 is flux-cored wire component and the weight/mass percentage composition of the present invention.
Table 1 flux-cored wire component and weight/mass percentage composition (%)
| Embodiment | TiO2 | SiO2 | ZrO2 | Al2O3 | MgO | AlF3 | NiF2 | Na2SiF6 |
| 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 | Ti3Al | Fe3Al | 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 ASTMA514 Low-alloy High-strength Steel, and test plate (panel) is of a size of 300 �� 150 �� 14mm." material and welding conditions " according to CCS, process single V groove with root face, adopt multi-pass welding welding mode, and after the complete back gouging of positive surface build-up welding, weldering is together, adopts no pulse constant voltage power supply DC reverse connection. Welding point V-notch impact specimen is prepared according to CCS " material and welding conditions ". Impact specimen is of a size of 10 �� 10 �� 55mm, and gap position is positioned at Weld pipe mill, and test temperature is 40 DEG C. The welding condition of each welding position is as shown in table 2, for the welding wire of the present invention, except pure CO2Outside other protective gas (such as Ar+20%CO2, He etc.) user demand can also be met. Result of the test shows, whole formula all can realize all-position welding.
Table 2 welding condition
Table 3 gives the method and standard that adopt the property of welded joint evaluation prepared by embodiment 1 ~ 4 flux-cored wire, respectively organizes the performance of flux-cored wire for overall merit.
Testing result shows, embodiment 1 ~ 4 appearance of weld is excellent, and weld defect, splash generation amount, flue dust generation amount and the removability of slag can be qualified.
The mechanical performance of embodiment 1 ~ 4, corrosion resistance and diffusible hydrogen content detection data are as shown in table 4, and 1 ~ 4 is respectively provided with excellent mechanical performance and qualified diffusible hydrogen content, and wherein 1 and 3 have excellent corrosion resistance.
Table 3 property of welded joint assessment method and standard
Table 4 mechanical performance, corrosion resistance and diffusible hydrogen content test result.
Related personnel can make various change in the content that above invention describes and basis, but these changes still fall within scope of the invention.
Claims (7)
1. an arc welding gas shielded flux cored wire, is characterized in that medicated core powder includes following component and weight/mass percentage composition: TiO220~22%��SiO21~4%��ZrO21~2.5%��Al2O31~3%��MgO1.5%��AlF35~9%��NiF25~6%��Na2SiF61~6%��Ti3Al3~4%��Fe3Al4 ~ 6%, Co1 ~ 2%, surplus is Fe; Medicated powder filling rate is 16 ~ 24%.
2. gas shielded flux cored wire according to claim 1, is characterized in that the Cu0.1% containing weight/mass percentage composition.
3. gas shielded flux cored wire according to claim 1, is characterized in that the Ce0.1% containing weight/mass percentage composition.
4. gas shielded flux cored wire according to claim 1, is characterized in that the Nd0.1% containing weight/mass percentage composition.
5. gas shielded flux cored wire according to claim 1, is characterized in that the Sm0.1% containing weight/mass percentage composition.
6. gas shielded flux cored wire according to claim 1, is characterized in that the Gd0.1% containing weight/mass percentage composition.
7. gas shielded flux cored wire according to claim 1, is characterized in that Na2SiF6Weight/mass percentage composition be 4%.
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| CN201410192425.7A CN103962746B (en) | 2014-05-08 | 2014-05-08 | A kind of arc welding gas shielded flux cored wire |
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| CN201410192425.7A CN103962746B (en) | 2014-05-08 | 2014-05-08 | A kind of arc welding gas shielded flux cored wire |
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| CN103962746A CN103962746A (en) | 2014-08-06 |
| CN103962746B true CN103962746B (en) | 2016-06-08 |
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| 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 |
| 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 |
| JP7231476B2 (en) * | 2019-05-09 | 2023-03-01 | 株式会社神戸製鋼所 | FLUX CORE WIRE, WELDING METHOD AND WELD METAL |
| 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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| JP3747237B2 (en) * | 2000-05-01 | 2006-02-22 | 株式会社神戸製鋼所 | Flux-cored wire for gas shielded arc welding for heat-resistant steel |
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- 2014-05-08 CN CN201410192425.7A patent/CN103962746B/en not_active Expired - Fee Related
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| CN1117902A (en) * | 1994-08-30 | 1996-03-06 | 天津大学 | Titanium-type gas shielded flux-cored welding stick |
| 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 |
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Effective date of registration: 20161114 Address after: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee after: Guangdong Institute of welding technology (Guangdong Institute of China and Ukraine) Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: GUANGDONG RESEARCH INSTITUTE OF INDUSTRIAL TECHNOLOGY (GUANGZHOU RESEARCH INSTITUTE OF NON-FERROUS METALS) |
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