CN104400250A - Low-temperature steel flux-cored wire - Google Patents

Low-temperature steel flux-cored wire Download PDF

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Publication number
CN104400250A
CN104400250A CN201410539664.5A CN201410539664A CN104400250A CN 104400250 A CN104400250 A CN 104400250A CN 201410539664 A CN201410539664 A CN 201410539664A CN 104400250 A CN104400250 A CN 104400250A
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China
Prior art keywords
flux
cored
low
cored wire
borax
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Granted
Application number
CN201410539664.5A
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Chinese (zh)
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CN104400250B (en
Inventor
吴光辉
张少健
王天虎
肖庆华
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Wuhan Tiemiao Welding Materials Co Ltd
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Wuhan Tiemiao Welding Materials Co Ltd
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Priority to CN201410539664.5A priority Critical patent/CN104400250B/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
    • B23K35/22—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
    • B23K35/02—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
    • B23K35/36—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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention discloses a low-temperature steel flux-cored wire. The low-temperature steel flux-cored wire is characterized by comprising the following components in percentage by mass: 35-45% of rutile, 1-5% of alkali metal oxides, 15-25% of low-carbon ferromanganese, 4-8% of fluorite, 3-10% of aluminum oxide, 2-6% of aluminum magnesium alloys, 3-10% of ferrosilicon, 3-8% of ferrotitanium, 0.5-2% of borax, 6-9% of nickel powder, and the balance of iron powder. The flux-cored wire is welded by CO2 protective gas, has excellent welding process property and comprehensive performance of deposited metal and a welded joint, and has the yield strength not lower than 460 MPa, the tensile strength not lower than 570 MPa, the elongation not lower than 22% and the Akv not lower than 50 J under the condition of -60 DEG C.

Description

A kind of flux-cored
Technical field
The present invention relates to welding material and manufacture field, be specifically related to a kind of low-temperature steel CO 2gas shielded welding flux-cored wire.
Background technology
Flux-cored wire has good welding technological properties and welding efficiency, more and more application is obtained in the industry such as shipbuilding, ocean engineering, need to use low-temperature steel welding material in offshore oil drilling platform is built, especially need the flux-cored wire with favorable low-temperature impact toughness.And Most current CO 2gas shielded welding flux-cored wire can only meet the impact test requirement of more than-40 DEG C temperature, and deposited metal yield strength rank, not higher than 400MPa, can not meet the ultra-high tensile steel welding having-60 DEG C of impact flexibility to require.
CN101450426B discloses " flux-cored ", and medicinal powder composition comprises rutile, wollastonite, silicomangan, iron powder 16 ~ 21, nickel powder, ice crystal, feldspar, ferrotianium, ferro-boron, mid-carbon fe-mn, magnesia, quartz and fluorite.Its deposited metal-40 DEG C of low-temperature impact works (adopting conventional detection technique) mean value is 78J (joule).
Flux-cored wire disclosed in CN103692110A, medicine core consists of: the iron powder of rutile, fluoride, other slag former, strong deoxidier, weak deoxidier, alloying constituent and surplus, wherein contains nickel powder in alloying constituent.This flux-cored wire yield strength grade is 375Mpa, and deposited metal low-temperature impact test temperature is-40 DEG C.
Summary of the invention
In order to solve the aforementioned problems in the prior, the invention provides a kind of mechanical property and can meet-60 DEG C of impact flexibility requirements, and meet yield strength higher grade flux-cored.If no special instructions, the percentage composition in the present invention is mass percentage.
Provided by the invention flux-cored, drug core component and mass percentage thereof are: rutile 35 ~ 45%; Alkali metal oxide 1 ~ 5%; Low-carbon ferromanganese 15 ~ 25%; Fluorite 4 ~ 8%; Aluminium oxide 3 ~ 10%; Almag 2 ~ 6%; Ferrosilicon 3 ~ 10%; Ferrotianium 3 ~ 8%; Borax 0.5 ~ 2%; Nickel powder 6 ~ 9%; Surplus is iron powder.Medicine core comprises inevitable impurity.
Through groping in a large number to analyze and experiment, under guarantee has the prerequisite of good welds technique, what the present invention taked is Al-Mg-Ti-Si-Mn combined deoxidation mode, and Al, Mg, Ti, Si, Mn derive from almag, ferrotianium, ferrosilicon, low-carbon ferromanganese.Its principle is: the affinity of aluminium, magnesium, titanium, silicon, manganese and oxygen element is greater than iron, preferential and oxygen generation oxidation reaction, reduce the oxidation of iron, have part silicon simultaneously, manganese is transitioned in weld seam as alloying component, thus guarantees that weld metal mechanical property reaches requirement.
In medicine core, rutile main component is TiO 2, fluxing effect.When rutile is less than 35%, the operation of vertical position welding difficulty, shaping bad; Rutile more than 45% time, slag fusing point raise, appearance of weld be deteriorated.
Alkali metal oxide is mainly used in regulating slag basicity, improves weld metal impact flexibility.When alkali metal oxide is less than 1%, do not play the effect improving toughness; More than 5% time, slag fusing point uprises, slag assemble agglomerating, appearance of weld be deteriorated, during welding splash become greatly changeable.
Fluorite contains CaF 2, can dehydrogenation in welding, reduce weld hydrogen content, reduce the probability producing cold crack, when content is less than 4%, dehydrogenation is not obvious; More than 8% time, in welding process, molten drop becomes large, and splashing increases, and welding procedure is deteriorated.
Aluminium oxide is as slag former, and regulate slag fusing point, improve the capability of welding vertically upwards energy, content is less than 3%, not effect; More than 10%, slag fusing point is too high, and vertical position welding is shaped and is deteriorated.
Almag, as deoxidier, can reduce a small amount of boron from borax simultaneously, and appropriate boron energy refinement seam organization, improves weld seam low-temperature impact toughness.
Ferrosilicon, ferrotianium, as deoxidier, have alloying effect simultaneously, guarantee that deposited metal yield strength grade meets 460MPa.When content is too much, yield strength is too high, and weld seam impact toughness declines, and then weld strength does not reach requirement very little.
Nickel powder contains a large amount of Ni, uses as alloying agent.Weld seam contains appropriate Ni, can reduce brittle transition temperature, and low-temperature impact toughness is met the demands.
Preferably, described medicine core quality accounts for 12 ~ 18% of flux-cored wire gross mass.
Preferably, described alkali metal oxide is one or both in magnesia and calcium oxide.In the mixture of magnesia and calcium oxide, both can be arbitrarily than.
Preferably, mass percentage≤1.0% of carbon in described low-carbon ferromanganese; Mass ratio Mn:C >=the 80:1 of manganese and carbon.Low-carbon ferromanganese contains a large amount of Mn and a small amount of C (≤1.0%), during Mn/C >=80, can guarantee Mn/C >=25 in weld seam, is beneficial to weld metal and forms acicular ferrite, thus ensure weld metal low-temperature impact toughness.In addition, low-carbon ferromanganese can participate in deoxidation, has alloying effect.
Preferably, described borax is for cure process through 400 DEG C.
Preferably, the described borax time of curing is 60 minutes, and the borax after curing crosses 80 mesh sieves.
Preferably, the sheetmetal wrapping up medicine core in flux-cored wire is SPCC steel band.
The present invention has following beneficial effect:
1, flux-cored wire of the present invention uses CO 2shielding gas, has excellent welding technological properties, deposited metal and welding point combination property: yield strength>=460MPa; Tensile strength>=570MPa; Percentage elongation>=22%; Under-60 DEG C of conditions, Akv>=50J.
2, for impact flexibility-60 DEG C, the requirement of Akv >=50J, flux-cored wire weld metal Ni content 1.2-1.6% of the present invention, has saved precious nickel resources.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, and to make those skilled in the art the present invention may be better understood and can be implemented, but illustrated embodiment is not as a limitation of the invention.
Embodiment flux-cored wire formula is in table 1, and sheetmetal is SPCC steel band, adopts conventional flux-cored wire manufacturing process.
Wherein, the alkali metal oxide of embodiment 1 ~ 3 is magnesia, and the alkali metal oxide of embodiment 4 ~ 6 is calcium oxide, and the alkali metal oxide of embodiment 7 ~ 9 is the mixture of magnesia and calcium oxide.In embodiment 4,5 and 9, low-carbon ferromanganese C content≤1.0% of flux-cored wire, borax is through curing process; Wherein the time of curing of embodiment 4 and 5 is 60 minutes, and the borax after curing is crossed 80 mesh sieves.
Table 1 flux-cored wire formula (mass percent)
Table 2 is depicted as chemical composition and the mechanical property of embodiment flux-cored wire deposited metal.Welding condition: protective gas CO 2, purity 99.95%; Welding current 230 ~ 240A; Weldingvoltage 26 ~ 27V; Speed of welding ~ 30mm/min.
The chemical composition of table 2 deposited metal and mechanical property
Can draw from the chemical composition of table 1 and table 2 illustrated embodiment: flux-cored wire of the present invention uses CO 2shielding gas, deposited metal and welding point combination property: yield strength>=460MPa; Tensile strength>=570MPa; Percentage elongation>=22%; Under-60 DEG C of conditions, Akv>=50J.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.

Claims (7)

1. one kind flux-cored, it is characterized in that, drug core component and mass percentage thereof are: rutile 35 ~ 45%; Alkali metal oxide 1 ~ 5%; Low-carbon ferromanganese 15 ~ 25%; Fluorite 4 ~ 8%; Aluminium oxide 3 ~ 10%; Almag 2 ~ 6%; Ferrosilicon 3 ~ 10%; Ferrotianium 3 ~ 8%; Borax 0.5 ~ 2%; Nickel powder 6 ~ 9%; Surplus is iron powder.
2. according to claim 1 flux-cored, it is characterized in that, described medicine core quality accounts for 12 ~ 18% of flux-cored wire gross mass.
3. according to claim 1 flux-cored, it is characterized in that, described alkali metal oxide is one or both in magnesia and calcium oxide.
4. according to claim 1 flux-cored, it is characterized in that, mass percentage≤1.0% of carbon in described low-carbon ferromanganese; Mass ratio Mn:C >=the 80:1 of manganese and carbon.
5. according to claim 1 flux-cored, it is characterized in that, described borax is for cure process through 400 DEG C.
6. according to claim 5 flux-cored, it is characterized in that, the described borax time of curing is 60 minutes, and the borax after curing crosses 80 mesh sieves.
7. according to claim 1 flux-cored, it is characterized in that, the sheetmetal of parcel medicine core is SPCC steel band.
CN201410539664.5A 2014-10-13 2014-10-13 A kind of flux-cored Active CN104400250B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104959748A (en) * 2015-07-02 2015-10-07 武汉铁锚焊接材料股份有限公司 Flux-cored wire special for maritime work low-temperature high-strength steel
CN106041362A (en) * 2016-08-03 2016-10-26 武汉铁锚焊接材料股份有限公司 Low-temperature steel flux-cored wire with nickel content being 1% or below
CN106041363A (en) * 2016-08-03 2016-10-26 武汉铁锚焊接材料股份有限公司 Flux-cored wire for low-temperature and ultra-high-strength steel
CN106141497A (en) * 2016-08-03 2016-11-23 武汉铁锚焊接材料股份有限公司 A kind of 685MPa grade super strength steel flux-cored wire
CN106513946A (en) * 2015-09-14 2017-03-22 江苏立新焊接材料有限公司 Method for seeping trace of boron into weld metal through electrode coating or flux core of flux-cored wire
CN106514052A (en) * 2015-09-14 2017-03-22 江苏立新焊接材料有限公司 Welding method for doping trace boron element into weld metal
CN106624422A (en) * 2016-12-15 2017-05-10 昆山京群焊材科技有限公司 56kg-grade flux-cored wire suitable for stress relief treatment after welding
CN106695175A (en) * 2015-08-11 2017-05-24 江苏立新焊接材料有限公司 Method for infiltrating trace boron elements into weld metal and welding method
CN109623193A (en) * 2018-12-26 2019-04-16 洛阳双瑞特种合金材料有限公司 Low-temperature steel seamless flux-cored wire with low hydrogen, high toughness and preparation method thereof
CN111940948A (en) * 2020-07-24 2020-11-17 天津沃盾耐磨材料有限公司 Environment-friendly high-wear-resistance flux-cored wire and preparation method thereof
CN112453756A (en) * 2020-11-19 2021-03-09 天津大桥金属焊丝有限公司 High-strength and high-toughness gas-shielded flux-cored wire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251711A (en) * 1978-02-25 1981-02-17 Nippon Steel Corporation Low-hydrogen coated electrode
CN101780609A (en) * 2009-01-15 2010-07-21 山东聚力焊接材料有限公司 Slag-free flux-cored wire
CN101850484A (en) * 2010-06-23 2010-10-06 南通晨曦焊业有限公司 Flux-cored wire of low-temperature steel
CN102328156A (en) * 2011-08-26 2012-01-25 武汉铁锚焊接材料股份有限公司 Reduced ilmenite type flux-cored wire
CN103692110A (en) * 2013-12-13 2014-04-02 天津三英焊业股份有限公司 Gas-shielded flux-cored wire for maritime engineering

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251711A (en) * 1978-02-25 1981-02-17 Nippon Steel Corporation Low-hydrogen coated electrode
CN101780609A (en) * 2009-01-15 2010-07-21 山东聚力焊接材料有限公司 Slag-free flux-cored wire
CN101850484A (en) * 2010-06-23 2010-10-06 南通晨曦焊业有限公司 Flux-cored wire of low-temperature steel
CN102328156A (en) * 2011-08-26 2012-01-25 武汉铁锚焊接材料股份有限公司 Reduced ilmenite type flux-cored wire
CN103692110A (en) * 2013-12-13 2014-04-02 天津三英焊业股份有限公司 Gas-shielded flux-cored wire for maritime engineering

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104959748A (en) * 2015-07-02 2015-10-07 武汉铁锚焊接材料股份有限公司 Flux-cored wire special for maritime work low-temperature high-strength steel
CN106695175A (en) * 2015-08-11 2017-05-24 江苏立新焊接材料有限公司 Method for infiltrating trace boron elements into weld metal and welding method
CN106513946A (en) * 2015-09-14 2017-03-22 江苏立新焊接材料有限公司 Method for seeping trace of boron into weld metal through electrode coating or flux core of flux-cored wire
CN106514052A (en) * 2015-09-14 2017-03-22 江苏立新焊接材料有限公司 Welding method for doping trace boron element into weld metal
CN106041363B (en) * 2016-08-03 2019-02-12 武汉铁锚焊接材料股份有限公司 A kind of low temperature unimach flux-cored wire
CN106141497A (en) * 2016-08-03 2016-11-23 武汉铁锚焊接材料股份有限公司 A kind of 685MPa grade super strength steel flux-cored wire
CN106041363A (en) * 2016-08-03 2016-10-26 武汉铁锚焊接材料股份有限公司 Flux-cored wire for low-temperature and ultra-high-strength steel
CN106041362B (en) * 2016-08-03 2018-08-17 武汉铁锚焊接材料股份有限公司 A kind of nickel content is flux-cored less than 1%
CN106041362A (en) * 2016-08-03 2016-10-26 武汉铁锚焊接材料股份有限公司 Low-temperature steel flux-cored wire with nickel content being 1% or below
CN106624422A (en) * 2016-12-15 2017-05-10 昆山京群焊材科技有限公司 56kg-grade flux-cored wire suitable for stress relief treatment after welding
CN109623193A (en) * 2018-12-26 2019-04-16 洛阳双瑞特种合金材料有限公司 Low-temperature steel seamless flux-cored wire with low hydrogen, high toughness and preparation method thereof
CN109623193B (en) * 2018-12-26 2021-02-09 中国船舶重工集团公司第七二五研究所 Low-hydrogen high-toughness seamless flux-cored wire for low-temperature steel and preparation method thereof
CN111940948A (en) * 2020-07-24 2020-11-17 天津沃盾耐磨材料有限公司 Environment-friendly high-wear-resistance flux-cored wire and preparation method thereof
CN111940948B (en) * 2020-07-24 2021-03-19 天津沃盾耐磨材料有限公司 Environment-friendly high-wear-resistance flux-cored wire and preparation method thereof
CN112453756A (en) * 2020-11-19 2021-03-09 天津大桥金属焊丝有限公司 High-strength and high-toughness gas-shielded flux-cored wire

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