CN106695171A - Flux-cored wire for non gas shielded welding - Google Patents
Flux-cored wire for non gas shielded welding Download PDFInfo
- Publication number
- CN106695171A CN106695171A CN201710071998.8A CN201710071998A CN106695171A CN 106695171 A CN106695171 A CN 106695171A CN 201710071998 A CN201710071998 A CN 201710071998A CN 106695171 A CN106695171 A CN 106695171A
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- Prior art keywords
- flux
- cored wire
- welding
- core
- low
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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
- B23K35/22—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
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention discloses a flux-cored wire for non gas shielded welding and belongs to the technical field of welding. The flux-cored wire comprises an outer skin and a flux core. The outer skin is a SPCC cold-rolled strip; the flux core comprises the following components in percentage by weight: 12-25% of CaF2, 10-20% of TiO2, 5-10% of Mn, 5-15% of CaO, 2-10% of MgO, 1-5% of zircon sand, 0.5-5% of Al-Mg, 3-10% of Ni and the balance of iron powder; and the filling rate of the flux core in the flux-cored wire is 15-25%. The flux-cored wire has excellent electric arc stability and low-temperature impact toughness; and the impact toughness of welding line metal is greater than 60 J at minus 40 DEG C.
Description
Technical field
The invention belongs to welding technology field, more particularly to a kind of non gas shielded welding flux-cored wire.More particularly to it is a kind of low
The low-alloy steel flux-cored wire that warm high ductility all position connects.
Background technology
The compatible advantage of welding rod and gas protecting welding wire welding of welded by self-shielded flux cord wire, its production efficiency is high, weldering
Connect processing performance good.Therefore the welding manner is obtained during the processing and manufacturing of the steel constructions such as pipeline, ship, bridge, ocean platform
To being widely applied.Just because of this, at present to the Functional Requirement of flux-cored wire also more and more higher, it is desirable to which flux-cored wire is not
Faster speed of welding is only adapted to, and with good welding technological properties and all-position welding adaptability, Yi Jifa
Shoot good toughness (particularly low-temperature flexibility).In pipeline, bridge, engineering machinery, offshore platform in pole cold zone etc.
The low-alloy high-strength steel of application should also keep good low-temperature impact toughness at -40 DEG C, and current self-protection flux-cored wire
The low-temperature impact toughness below -40 DEG C cannot be ensured.
The content of the invention
It is an object of the invention to provide a kind of non gas shielded welding flux-cored wire, current self-shield fluxed-cored welding is solved
Silk cannot ensure the problem of the low-temperature impact toughness below -40 DEG C.There is provided a kind of with splendid welding technological properties and complete
Adaptability is welded in position, and appearance of weld is attractive in appearance, and bonding strength is high, and the self-insurance with good impact flexibility under -40 DEG C of low temperature
Shield flux-cored wire.
A kind of non gas shielded welding flux-cored wire, including crust and medicine core, crust are SPCC cold-rolled strips；The composition of medicine core is pressed
Its percentage by weight is：CaF2：12-25%, TiO2：10-20%, Mn：5-10%, CaO：5~15%, MgO：2~10%, zirconium
Sand：1-5%, Al-Mg：0.5-5%, Ni：3-10%, other fluorides：1-10%, iron oxide：2-8%, Al2O3:0.5-
5%, MnO2：0.5-5%, SiO2：0.5-5%, balance of iron powder；The filling rate of medicine core is 15-25% in flux-cored wire.
The percentage by weight of Al content is 40-60% in described Al-Mg alloys.
Other described fluorides are BaF2、LiF、MgF2、Na3AlF6And Na2SiF6In the mixture of one or more.
Described iron oxide is FeO, Fe2O3And Fe3O4In the mixture of one or more.
Iron oxide, Al2O3And MnO2Content sum is not less than 10wt%.
Flux-cored wire of the present invention is obtained using conventional flux-cored wire technology of preparing.
The effect of each component is as follows in medicine core：
TiO2：Be slag formed component, the covering performance and the weld seam removability of slag of lid slag can be improved, and play electric arc concentrate,
Stabilization, improves appearance of weld and reduces and splash.If content is too low, it is difficult to form short slag, it is unfavorable that opposition, transverse presentation put weldering；If containing
Amount is too high, then significantly affect comprehensive mechanical property.
Mn：Ensure the intensity of weld metal and reduce oxygen, sulfur content, Mn is austenizer, is conducive to needle-like iron element
Body is formed, and is conducive to improving low-temperature impact toughness.
Si：Ensure the intensity of welding metal as deoxidier and reduce oxygen content.If too high levels, deposited metal it is viscous
Degree is uprised, and influences all-position welding performance.
Al-Mg：Main Function is deoxidation denitrogenation, the Al produced after deoxidation2O3, with regulation high-temperature slag physical property
Left and right, is conducive to improving all-position welding performance.
FeO:With regulation slag basicity, impurity content, the effect of pure weld seam are reduced.To ensuring that low-temperature impact has weight
Influence.Add excessively to cause to splash and increase, shaping is deteriorated.
Ni：The intensity and low-temperature flexibility of weld metal are ensured, Ni is austenizer, with preventing in weld metal
The toughness reduction due to residual delta ferrite.
Fluoride：Main Function be regulation slag fusing point, stabilization electric arc, dilution slag and increase slag gas permeability and
Reach the purpose of dehydrogenation.Various fluorides in medicine core can be decomposed at high temperature, vaporization, produce substantial amounts of fluorine steam and significantly
The hydrogen dividing potential drop in arc atmosphere is reduced, so as to play dehydrogenation ability.Fluoride in medicine core is sent out with a large amount of rutile in welding
Raw reaction, produces TiF4Secondary response can occur with hydrogen atom in arc atmosphere and water vapour, form the stabilization insoluble in molten steel
Hydrofluoride HF, so as to reduce the hydrogen dividing potential drop in arc atmosphere, reduces weld seam hydrogen content.
TiO2+XF→XO+TiF4
TiO2+XF→XTiO3+TiF4
Product TiF4Secondary response can occur with hydrogen atom in arc atmosphere and water vapour:
TiF4+H→TiF+HF↑
TiF4+H2O (vapour) → TiO2+HF↑
The addition of various fluorides, the BaF in being such as formulated2Very short electric arc can be supported, is reduced during all-position welding
Arc energy and welding wire burning velocity, it is easier to control molten bath, partially fluorinated thing decomposites the ionization potentials such as lithium, potassium, sodium less than calcium,
The arc stability of welding wire can be improved.
Other oxides (Al2O3, SiO2, MnO2)：The physical property of slag can be improved, be conducive to all position welding, improve de-
The performances such as slag.
Iron powder：Modifying ingredients, it is ensured that arc stability, improves deposition efficiency.
The advantage of the invention is that：
1) there is excellent low-temperature impact toughness, weldering again while flux-cored wire of the present invention has good arc stability
Impact flexibility under seam -40 DEG C of low temperature of metal is more than 60J, the good combination property of welding wire, all-position welding function admirable.
2) oxide of iron is added in flux-cored wire of the present invention, the dehydrogenation effect of welding wire is improve, strong denitrogenation oxygen agent is added
Aluminium, magnesium, are conducive to discharge and the appearance of weld of weld seam gas.Effectively raise the low-temperature impact toughness of weld metal.
Specific embodiment
Embodiment 1
It is crust that low-temperature high-toughness all-position welding self-protection flux-cored wire uses SPCC cold-rolled strips；The chemistry of medicine core
Constituting (weight %) is：CaF2：12%, TiO2：15%, Mn：6%, CaO：15%, MgO：4%, zircon sand：4%, Al-Mg：
3%, Ni：5%, other fluorides：7%, iron oxide：4%, Al2O3:2%, MnO2：5%, SiO2：3%, balance of iron powder；Medicine
The filling rate of medicine core is 15% in core welding wire.
Embodiment 2
It is crust that low-temperature high-toughness all-position welding self-protection flux-cored wire uses SPCC cold-rolled strips；The chemistry of medicine core
Constituting (weight %) is：CaF2：18%, TiO2：16%, Mn：8%, CaO：7%, MgO：5%, zircon sand：3%, Al-Mg：
2.5%, Ni：4%, other fluorides：3%, iron oxide：6%, Al2O3:3%, MnO2：2%, SiO2：1%, balance of iron powder；
The filling rate of medicine core is 18% in flux-cored wire.
Embodiment 3
It is crust that low-temperature high-toughness all-position welding self-protection flux-cored wire uses SPCC cold-rolled strips；The chemistry of medicine core
Constituting (weight %) is：CaF2：21%, TiO2：13%, Mn：4%, CaO：7%, MgO：9%, zircon sand：1%, Al-Mg：
5%, Ni：9%, other fluorides：9%, iron oxide：3%, Al2O3:4%, MnO2：5%, SiO2：5%, balance of iron powder；Medicine
The filling rate of medicine core is 21% in core welding wire.
Embodiment 4
It is crust that low-temperature high-toughness all-position welding self-protection flux-cored wire uses SPCC cold-rolled strips；The chemistry of medicine core
Constituting (weight %) is：CaF2：25%, TiO2：18%, Mn：5%, CaO：7%, MgO：3%, zircon sand：1%, Al-Mg：
0.5%, Ni：10%, other fluorides：2%, iron oxide：8%, Al2O3:0.5%, MnO2：2%, SiO2：0.5%, it is balance of
Iron powder；The filling rate of medicine core is 25% in flux-cored wire.
The flux-cored wire prepared in embodiment 1-4 is carried out into soldering test, arc stability in welding process splashes few, weldering
It is seamed into type, de- slag excellent；The mechanical performance index of its deposited metal is measured using GB/229-2007 and GB228-2002 standards
For：Tensile strength sigmab：650-720MPa, yield strength σ0.2：500-600MPa, elongation percentage δ5：25-35%, impact absorbing energy Akv
(-40℃)：60-100J.
Claims (5)
1. a kind of non gas shielded welding flux-cored wire, including crust and medicine core, it is characterised in that crust is SPCC cold-rolled strips；Medicine
The composition of core is by its percentage by weight：CaF2：12-25%, TiO2：10-20%, Mn：5-10%, CaO：5~15%, MgO：2
~10%, zircon sand：1-5%, Al-Mg：0.5-5%, Ni：3-10%, other fluorides：1-10%, iron oxide：2-8%,
Al2O3:0.5-5%, MnO2：0.5-5%, SiO2：0.5-5%, balance of iron powder；The filling rate of medicine core is 15- in flux-cored wire
25%.
2. welding wire according to claim 1, it is characterised in that the percentage by weight of Al content in described Al-Mg alloys
It is 40-60%.
3. welding wire according to claim 1, it is characterised in that other described fluorides are BaF2、LiF、MgF2、
Na3AlF6And Na2SiF6In the mixture of one or more.
4. welding wire according to claim 1, it is characterised in that described iron oxide is FeO, Fe2O3And Fe3O4In one kind
Or several mixtures.
5. welding wire according to claim 1, it is characterised in that described iron oxide, Al2O3And MnO2Content sum is not small
In 10wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071998.8A CN106695171A (en) | 2017-02-09 | 2017-02-09 | Flux-cored wire for non gas shielded welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071998.8A CN106695171A (en) | 2017-02-09 | 2017-02-09 | Flux-cored wire for non gas shielded welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106695171A true CN106695171A (en) | 2017-05-24 |
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ID=58910433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710071998.8A Pending CN106695171A (en) | 2017-02-09 | 2017-02-09 | Flux-cored wire for non gas shielded welding |
Country Status (1)
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| CN (1) | CN106695171A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109226995A (en) * | 2018-10-31 | 2019-01-18 | 首钢集团有限公司 | A kind of self-shield flux-cored welding wire for overlaying welding |
| CN109719424A (en) * | 2019-03-11 | 2019-05-07 | 江苏南通瑞舶莱焊业科技有限公司 | A kind of anti-stomata self-protection flux-cored wire |
| CN109894767A (en) * | 2019-04-29 | 2019-06-18 | 江苏九洲新材料科技有限公司 | A kind of ilmenite type E308 flux-cored wire |
| CN110936060A (en) * | 2019-12-11 | 2020-03-31 | 天津市永昌焊丝有限公司 | Alkaline high-strength steel flux-cored wire |
| CN110961822A (en) * | 2018-10-01 | 2020-04-07 | 林肯环球股份有限公司 | Additive manufacturing using aluminum-containing welding wire |
| CN113909737A (en) * | 2021-11-08 | 2022-01-11 | 山东寿光巨能特钢有限公司 | Flux core and welding wire for improving low-temperature toughness |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4339286A (en) * | 1980-05-27 | 1982-07-13 | Kasatkin Boris S | Core flux composition for flux-cored wires |
| JPH04319092A (en) * | 1991-04-19 | 1992-11-10 | Nippon Steel Corp | Low hydrogen type coated arc welding electrode |
| CN1117903A (en) * | 1994-08-30 | 1996-03-06 | 天津大学 | Low alloy steel high-toughness self-shielded flux-cored welding stick |
| CN1223922A (en) * | 1999-01-12 | 1999-07-28 | 冶金工业部钢铁研究总院 | Gas shield cored electrode for high ductility all position 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 |
| CN104117789A (en) * | 2014-08-06 | 2014-10-29 | 武汉铁锚焊接材料股份有限公司 | Low temperature steel flux-cored welding wire |
-
2017
- 2017-02-09 CN CN201710071998.8A patent/CN106695171A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4339286A (en) * | 1980-05-27 | 1982-07-13 | Kasatkin Boris S | Core flux composition for flux-cored wires |
| JPH04319092A (en) * | 1991-04-19 | 1992-11-10 | Nippon Steel Corp | Low hydrogen type coated arc welding electrode |
| CN1117903A (en) * | 1994-08-30 | 1996-03-06 | 天津大学 | Low alloy steel high-toughness self-shielded flux-cored welding stick |
| CN1223922A (en) * | 1999-01-12 | 1999-07-28 | 冶金工业部钢铁研究总院 | Gas shield cored electrode for high ductility all position 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 |
| CN104117789A (en) * | 2014-08-06 | 2014-10-29 | 武汉铁锚焊接材料股份有限公司 | Low temperature steel flux-cored welding wire |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110961822A (en) * | 2018-10-01 | 2020-04-07 | 林肯环球股份有限公司 | Additive manufacturing using aluminum-containing welding wire |
| CN109226995A (en) * | 2018-10-31 | 2019-01-18 | 首钢集团有限公司 | A kind of self-shield flux-cored welding wire for overlaying welding |
| CN109719424A (en) * | 2019-03-11 | 2019-05-07 | 江苏南通瑞舶莱焊业科技有限公司 | A kind of anti-stomata self-protection flux-cored wire |
| CN109894767A (en) * | 2019-04-29 | 2019-06-18 | 江苏九洲新材料科技有限公司 | A kind of ilmenite type E308 flux-cored wire |
| CN110936060A (en) * | 2019-12-11 | 2020-03-31 | 天津市永昌焊丝有限公司 | Alkaline high-strength steel flux-cored wire |
| CN110936060B (en) * | 2019-12-11 | 2021-09-17 | 天津市永昌焊丝有限公司 | Alkaline high-strength steel flux-cored wire |
| CN113909737A (en) * | 2021-11-08 | 2022-01-11 | 山东寿光巨能特钢有限公司 | Flux core and welding wire for improving low-temperature toughness |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Applicant after: Shougang Group Co. Ltd. Applicant after: Beijing Shougang Huaxia Engineering Technology Co., Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Applicant before: Capital Iron & Steel General Company Applicant before: Beijing Shougang Huaxia Engineering Technology Co., Ltd. |
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |