CN103878501A - Metal-cored seamless flux-cored wire for high-strength steel - Google Patents

Metal-cored seamless flux-cored wire for high-strength steel Download PDF

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Publication number
CN103878501A
CN103878501A CN201310628417.8A CN201310628417A CN103878501A CN 103878501 A CN103878501 A CN 103878501A CN 201310628417 A CN201310628417 A CN 201310628417A CN 103878501 A CN103878501 A CN 103878501A
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cored
wire
metal
flux
cored wire
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张晓�
孔红雨
郭纯
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725th Research Institute of CSIC
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725th Research Institute of CSIC
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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
    • B23K35/362—Selection of compositions of fluxes

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention discloses a metal-cored seamless flux-cored wire for high-strength steel. The flux filling rate relative to the total mass of the wire is 15wt%. Relative to the total mass of the wire, components include, by mass, 0.02-0.12% of C (carbon), 0.2-0.7% of Si (silicon), 1.0-3.0% of Mn (manganese), 1.0-3.5% of Ni (nickel), 0.1-0.5% of Cr (chromium), not more than 0.05% of Al (aluminum), 0.1-0.7% of molybdenum, 2.5-7.5% of TiO2 (titanium oxide), not more than 0.02% of Cu (copper) and not more than 0.5% of arc stabilizer, the balance being Fe (iron) and inevitable impurities. The metal-cored seamless flux-cored wire has high strength, and yield strength of deposited metal can reach above 690MPa; the metal-cored seamless flux-cored wire has good low-temperature impact toughness, and impact energy average value at the temperature of minus 40 DEG C reaches above 80J; the metal-cored seamless flux-cored wire has good welding manufacturability, electric arcs are stable during welding, jet transition is easily formed, easy operation is realized, welding seams are formed well, and dregs are few; the surface of the flux-cored wire is plated with copper, so that electricity conduction capability is improved, and wire feeding is stable.

Description

Metal powder core pattern seamless flux-cored wire for a kind of high-strength steel
Technical field
The invention belongs to field of welding material, especially relate to a kind of high-strength steel metal powder core pattern seamless flux-cored wire.
Background technology
Known, it is more and more extensive in engineering application that yield strength exceedes the high-strength steel of 690MPa, particularly more and more in ocean engineering platform and machinery, boats and ships, bridge application.It is high that metal powder type flux-cored wire has deposition efficiency, and multi-pass welding is without scarfing cinder, the advantage of greatly increasing work efficiency, but the common metal powder core pattern flux-cored wire that high-strength steel is used exists diffusible hydrogen high, the problem that low-temperature impact toughness is poor.
Number of patent application 200710054660.8, publication number CN 101323057A disclose a kind of yield strength and have exceeded 785MPa low-alloy steel welding seamless flux-cored wire, and the weld metal intensity that embodiment provides exceedes 785MPa, and all adopts 95%Ar-5%O 2welding, adopts the weld seam wetability of the method poor, easily occurs incomplete tusion defect.
Number of patent application 200610071612.5, publication number CN1840728A disclose a kind of low alloy steel weld metal and for the flux cored wire of this weld metal is provided, the weld metal yield strength that embodiment provides is between 440～680MPa.
Foreign patent retrieval: this patent of Flux cored wire for gas shielded arc welding of high strength steel publication number US2011/0073570A1 discloses a kind of slag type high-strength steel flux-cored wire.
Metal cored wire for gas shielded arc welding having excellent zinc primer resistant performance and low temperature impact toughness publication number: US6, this patent of 476,356B2 discloses a kind of metal powder type flux-cored wire for galvanized steel plain sheet.
Find through retrieval, not relevant for adopting Ar-CO 2mixed gas protected, yield strength exceedes the patent of the metal powder core pattern seamless flux-cored wire of the high-strength steel welding use of 690MPa.
Summary of the invention
The object of the present invention is to provide a kind of high-strength steel metal powder core pattern seamless flux-cored wire, this welding wire is adapted to adopt Ar-CO2 mixed gas protected, and welding buckling strength exceedes the high-strength steel of 690MPa.
In order to realize described goal of the invention, the present invention adopts following technical scheme:
Metal powder core pattern seamless flux-cored wire for a kind of high-strength steel, solder flux is 15wt% with respect to the filling rate of welding wire gross mass, with respect to welding wire gross mass, containing constituent mass percentage is: C:0.02～0.12%, Si:0.2～0.7%, Mn:1.0～3.0%, Ni:1.0～3.5%, Cr:0.1～0.5%, Al :≤0.05%, molybdenum: 0.1～0.7%, TiO2:2.5～7.5%, Cu :≤0.02, arc stabilizer :≤0.5%, surplus is Fe and inevitable impurity.
Metal powder core pattern seamless flux-cored wire for high-strength steel as claimed in claim 1, described arc stabilizer is alkaline metal oxide and fluoride; Described alkaline metal oxide is Na 2o or K 2o, described fluoride is NaF, K 2siF 6, K 2zrF 6, Na 3alF 6, K 3alF 6in one or more, content of fluoride≤0.1%.
Owing to having adopted technique scheme, the present invention has following beneficial effect: for existing 690MPa level metal powder type flux-cored wire, diffusible hydrogen is high, the poor problem of low-temperature impact toughness simultaneously, a kind of metal powder core pattern of the present invention seamless flux-cored wire.Welding wire of the present invention adopts Ar-CO 2mixed gas arc welding connects, with respect to pure CO 2the welding wire of gas shield, molten drop is thinner, appearance of weld is better, simultaneously due to the deoxidant element such as Si, Mn still less, so the face of weld quantity of slag is still less.Particularly this flux-cored wire surface can copper facing, and this has improved conductive capability and the antirust ability of flux-cored wire greatly.
Key problem in technology of the present invention is the ratio of controlling various medicinal powder in flux-cored wire: C:0.02～0.12%, Si:0.2～0.7%, Mn:1.0～3.0%, Ni:1.0～3.5%, Cr :≤0.05%, Al :≤0.05%, molybdenum: 0.1～0.7%, TiO2:2.5～7.5%, other is Fe and Na 2o, K 2o, NaF, K 2siF 6, K 2zrF 6, Na 3alF 6, K 3alF 6in alkaline metal oxide and the fluoride with stabilising arc effect.Above content is and accounts for welding wire weight proportion (lower same).Welding wire surface copper facing.
Carbon: carbon is the important element that solution strengthening ensures deposited metal intensity, and certain carbon content can lower splashing of welding wire short circuiting transfer simultaneously, and the form that adds of carbon can be graphite, various ferroalloys etc.Carbon content is less than 0.02% can not proof strength, and carbon content is greater than 0.12% and can causes intensity too high on the one hand, can worsen on the other hand welding procedure.
Silicon: silicon is important deoxidant element, also be intensified element simultaneously, a certain amount of silicon has important function for improving intensity and toughness, but excessive silicon can cause in weld seam siliconising serious, worsen low-temperature flexibility, also can cause weld seam slag too much, in multi-pass welding, easily occur the defect of slag inclusion simultaneously.Therefore between silicone content control 0.2～0.70%.The form that adds of silicon can be ferrosilicon, silicomangan etc.
Manganese: manganese is important deoxidant element is also intensified element simultaneously, and a certain amount of manganese has important function for improving intensity and toughness, but excessive manganese can cause intensity too high, worsens low-temperature flexibility, therefore between manganese content control 1.0～3.0%.The form that adds of manganese can be ferromanganese, manganese metal, silicomangan etc.
Nickel: it is also to improve the important element of toughness that nickel not only can improve weld metal intensity simultaneously.If nickel content is less than 1.0%, so just do not reach effect, but nickel content is greater than 3.5%, intensity can be too high so, and toughness declines, and easily occurs fire check simultaneously.
Chrome: Chrome is a kind of important precipitation strength element of separating out, and is easy to be combined in crystal boundary Xi Chu Tan Chrome compound with carbon, improve weld strength, but Guo Gao Chrome can worsen low-temperature impact toughness.Between Yin Ci Chrome content restriction 0.1～0.5%.The form that adds of Chrome can be Jin Shu Chrome, Di Tan Chrome iron etc.
Molybdenum: molybdenum can significantly improve weld metal intensity, but too high levels can have a negative impact to toughness, and therefore the content of molybdenum is controlled between 0.1～0.7%.
Arc stabilizer: Na 2o, K 2o, K 2zrF 6,, K 3alF 6deng thering is stabilising arc effect, improve welding procedure, improve and form the welding procedure scope of spray transfer, therefore amount of filling otherwise higher than 0.50%, if dose excessively, can cause de-slag difficulty.Wherein the content of fluoride can not exceed 0.10%, splashes otherwise can produce in a large number.
Copper: copper has the precipitation strength of separating out effect, but excessive copper easily strengthens generation liquation crack tendency.Therefore copper content is less than 0.02%.The form that adds of copper can be metallic copper, also can be by adding in welding wire surface copper facing.
Metal powder core pattern seamless flux-cored wire of the present invention has following features:
Deposited metal yield strength there is higher intensity, more than can reach 690MPa.
There is good low-temperature impact toughness, more than-40 DEG C of ballistic work mean values reach 80J.
Have good welding procedure, arc stability when welding, is easy to form spray transfer, processing ease, and appearance of weld is good, and slag is few.
Flux-cored wire copper coating, improves conductive capability, and wire feed is stable.
The low 3ml/100g that is less than of deposited metal diffusible hydrogen.
Detailed description of the invention
Explanation the present invention that can be detailed by the following examples, discloses object of the present invention and is intended to protect all technological improvements in the scope of the invention.
Raw material title Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5
Graphite 0.02 0.05 0.07 0.12 0.10
Ferrosilicon 0.3 0.4 0.2 0.7 0.5
Manganese metal 1.5 1.0 3.0 2.5 2.0
Nickel powder 2.0 2.5 1.0 3.0 3.5
Cr 0.2 0.1 0.5 0.3 0.4
Al 0.03 ? 0.02 0.05 0.01
Molybdenum 0.1 0.3 0.7 0.4 0.5
TiO 2 2.5 3.8 4.2 7.0 7.5
Cu 0.01 0.012 0.015 0.015 0.02
Na 2O ? 0.4 ? ? 0.45
K 2O 0.3 ? 0.2 0.25 ?
NaF 0.05 0.02 0.03 ? ?
K 2SiF6 ? 0.05 ? ? 0.05
Na 3AlF 6 ? ? 0.07 0.02 ?
Surplus is Fe and inevitable impurity.
Embodiment deposited metal mechanical property is as shown in table 2.
Table 2 embodiment deposited metal mechanical property
Figure BDA0000426357770000051
Embodiment deposited metal diffusible hydrogen is as shown in table 3.
Table 3 embodiment deposited metal diffusible hydrogen ml/100g
Figure BDA0000426357770000052
Part not in the detailed description of the invention is prior art.

Claims (2)

1. a metal powder core pattern seamless flux-cored wire for high-strength steel, it is characterized in that: solder flux is 15wt% with respect to the filling rate of welding wire gross mass, with respect to welding wire gross mass, containing constituent mass percentage is: C:0.02～0.12%, Si:0.2～0.7%, Mn:1.0～3.0%, Ni:1.0～3.5%, Cr:0.1 ~ 0.5%, Al :≤0.05%, molybdenum: 0.1～0.7%, TiO2:2.5～7.5%, Cu :≤0.02, arc stabilizer :≤0.5%, surplus is Fe and inevitable impurity.
2. metal powder core pattern seamless flux-cored wire for high-strength steel as claimed in claim 1, is characterized in that: described arc stabilizer is alkaline metal oxide and fluoride; Described alkaline metal oxide is Na2O or K2O, and described fluoride is one or more in NaF, K2SiF6, K2ZrF6, Na3AlF6, K3AlF6, content of fluoride≤0.1%.
CN201310628417.8A 2013-11-29 2013-11-29 Metal-cored seamless flux-cored wire for high-strength steel Pending CN103878501A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104289825A (en) * 2014-08-27 2015-01-21 洛阳双瑞特种合金材料有限公司 Steel seamless flux-cored wire used in mixed gas of AR and CO2
CN105057925A (en) * 2015-07-30 2015-11-18 洛阳双瑞特种合金材料有限公司 Metal powder core-type seamless flux-cored wire for angle welding
CN106736048A (en) * 2016-11-29 2017-05-31 洛阳双瑞特种合金材料有限公司 A kind of high-strength weathering steel metal powder core pattern seamless flux-cored wire
CN106736049A (en) * 2016-11-29 2017-05-31 洛阳双瑞特种合金材料有限公司 A kind of good seamless flux-cored wire of the capability of welding vertically upwards
CN110253172A (en) * 2019-07-14 2019-09-20 新乡市和光科技有限公司 A kind of high-strength steel Ar-CO2Metal powder core solder wire used for gas shield welding
CN110480207A (en) * 2019-08-21 2019-11-22 上海工程技术大学 A kind of flux-cored wire containing compound rare-earth element suitable for the welding of 1000MPa grades of super-high strength steels
CN112917042A (en) * 2021-01-26 2021-06-08 西安理工大学 High-toughness gas-shielded flux-cored wire for X80 pipeline steel and preparation method thereof

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US20030052112A1 (en) * 2001-04-09 2003-03-20 Kiswel Ltd. Flux cored wire for gas shielded arc welding
CN1528555A (en) * 2003-10-17 2004-09-15 安泰科技股份有限公司 High-strength welding electrode
CN1569386A (en) * 2004-05-10 2005-01-26 安泰科技股份有限公司 High strength welding rod with excellent low-temperature toughness
CN101125399A (en) * 2007-08-27 2008-02-20 常州华通焊丝有限公司 Carbon steel flux-cored wire used for gas shield welding
CN101157164A (en) * 2006-10-02 2008-04-09 株式会社神户制钢所 Gas coverage arc welding compound core solder wire for steel with high tension
CN101898286A (en) * 2010-07-30 2010-12-01 西安理工大学 Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding
CN102658442A (en) * 2012-05-08 2012-09-12 上海电力修造总厂有限公司 Low-alloy steel covered arc welding electrode with Cr control capacity and FAC resisting capacity of weld metal of basic slag system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030052112A1 (en) * 2001-04-09 2003-03-20 Kiswel Ltd. Flux cored wire for gas shielded arc welding
CN1528555A (en) * 2003-10-17 2004-09-15 安泰科技股份有限公司 High-strength welding electrode
CN1569386A (en) * 2004-05-10 2005-01-26 安泰科技股份有限公司 High strength welding rod with excellent low-temperature toughness
CN101157164A (en) * 2006-10-02 2008-04-09 株式会社神户制钢所 Gas coverage arc welding compound core solder wire for steel with high tension
CN101125399A (en) * 2007-08-27 2008-02-20 常州华通焊丝有限公司 Carbon steel flux-cored wire used for gas shield welding
CN101898286A (en) * 2010-07-30 2010-12-01 西安理工大学 Low-hydrogen alkaline welding rod for 25Cr2Ni4MoV alloy steel manual arc welding
CN102658442A (en) * 2012-05-08 2012-09-12 上海电力修造总厂有限公司 Low-alloy steel covered arc welding electrode with Cr control capacity and FAC resisting capacity of weld metal of basic slag system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104289825A (en) * 2014-08-27 2015-01-21 洛阳双瑞特种合金材料有限公司 Steel seamless flux-cored wire used in mixed gas of AR and CO2
CN105057925A (en) * 2015-07-30 2015-11-18 洛阳双瑞特种合金材料有限公司 Metal powder core-type seamless flux-cored wire for angle welding
CN106736048A (en) * 2016-11-29 2017-05-31 洛阳双瑞特种合金材料有限公司 A kind of high-strength weathering steel metal powder core pattern seamless flux-cored wire
CN106736049A (en) * 2016-11-29 2017-05-31 洛阳双瑞特种合金材料有限公司 A kind of good seamless flux-cored wire of the capability of welding vertically upwards
CN106736048B (en) * 2016-11-29 2019-04-19 洛阳双瑞特种合金材料有限公司 A kind of high-strength weathering steel metal powder core pattern seamless flux-cored wire
CN106736049B (en) * 2016-11-29 2019-04-19 洛阳双瑞特种合金材料有限公司 A kind of good seamless flux-cored wire of the capability of welding vertically upwards
CN110253172A (en) * 2019-07-14 2019-09-20 新乡市和光科技有限公司 A kind of high-strength steel Ar-CO2Metal powder core solder wire used for gas shield welding
CN110480207A (en) * 2019-08-21 2019-11-22 上海工程技术大学 A kind of flux-cored wire containing compound rare-earth element suitable for the welding of 1000MPa grades of super-high strength steels
CN110480207B (en) * 2019-08-21 2021-03-16 上海工程技术大学 Flux-cored wire containing composite rare earth elements and suitable for welding 1000 MPa-grade ultrahigh-strength steel
CN112917042A (en) * 2021-01-26 2021-06-08 西安理工大学 High-toughness gas-shielded flux-cored wire for X80 pipeline steel and preparation method thereof
CN112917042B (en) * 2021-01-26 2022-07-01 西安理工大学 High-toughness gas-shielded flux-cored wire for X80 pipeline steel and preparation method thereof

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Application publication date: 20140625