CN105269179A - Sintered flux for surfacing with band-electrode of submerged-arc welding - Google Patents

Sintered flux for surfacing with band-electrode of submerged-arc welding Download PDF

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Publication number
CN105269179A
CN105269179A CN201510685944.1A CN201510685944A CN105269179A CN 105269179 A CN105269179 A CN 105269179A CN 201510685944 A CN201510685944 A CN 201510685944A CN 105269179 A CN105269179 A CN 105269179A
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CN
China
Prior art keywords
surfacing
welding
arc welding
submerged
sintered flux
Prior art date
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Application number
CN201510685944.1A
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Chinese (zh)
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CN105269179B (en
Inventor
周力
张伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jinzhou Aolin Kang Swan Welding Ltd
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Jinzhou Aolin Kang Swan Welding Ltd
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Priority to CN201510685944.1A priority Critical patent/CN105269179B/en
Publication of CN105269179A publication Critical patent/CN105269179A/en
Application granted granted Critical
Publication of CN105269179B publication Critical patent/CN105269179B/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
    • B23K35/36—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
    • B23K35/3603—Halide salts
    • B23K35/3605—Fluorides
    • 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
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/12—Vessels
    • 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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/04—Welding for other purposes than joining, e.g. built-up welding
    • B23K9/042—Built-up welding on planar surfaces
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/18—Submerged-arc welding

Abstract

Sintering flux for surfacing with band-electrode of submerged-arc welding is composed of, by weight, 26%-32% of CaF2, 15%-22% of CaO, 25%-31% of Al2O3, 12%-18% of MgO, 2.5%-3.5% of Be2O, 1%-2% of TiO2, 0.5%-0.8% of BiO2, and the balance SiO2 contained in the components per se and inevitable impurities. The sintered flux has the beneficial effects that (1) the weld bead depth of fusion is quite uniform; (2) the base material dilution rate level is lower, so that the chemical component and performance requirement is met through fewer surfacing layers; (3) the deposition efficiency is higher, and therefore the higher productivity is achieved; (4) the chemical components of deposited metal are uniform; (5) the surfacing layers have lower crack sensitivity as the surfacing layers have no concentrated line of solidification; (6) the surfaces of the surfacing layers are quite smooth, and therefore the number of surfacing weld beads and the number of lap joints can be reduced; (7) the repeatable productivity is high.

Description

A kind of strip surfacing sintered flux used for submerged arc welding
Technical field
The invention belongs to emerging field of welding material, be specifically related to the band pole submerged arc overlay welding sintered flux that can be used for nuclear reactor, pressure vessel corrosive medium, petrochemical industry reactor equal pressure container liner large-area built-up welding.
Background technology
High-speed strip overlay welding technology, as an important large component reparation and the technology of producing corrosion-resistant member, plays very important effect in modern industry is produced.And along with the development of petrochemical industry and nuclear industry, increase to the demand of thick-walled pressure vessel, this kind of container runs under high temperature and high pressure environment, and majority is subject to the corrosion of medium, therefore requires that solder flux has enough corrosion resistances.Because container wall thickness is larger, stainless steel manufacture is adopted if overall, not only uneconomical and thickness but also large, so the manufacture method generally adopted at present carries out stainless steel built-up welding at the container inner wall of low-alloy forging bending thick plates, make container namely have the withstand voltage properties met the demands, there is again excellent decay resistance.
The method of the more senior alloy of a kind of most economical and popular utilization is strip surfacing.Welding (typical 60mm bandwidth) heap is soldered on mother metal.In this way, welding and mother metal one piece of melting; Bi-material mixing is set in together, finally obtains the overlay cladding that the uniform and mother metal of a performance has good combination.But there is following problem in existing strip surfacing sintered flux: 1, CaF 2content is low, affects spreading out the property of welding bead, fusion character and the removability of slag; 2, Al 2o 3addition is low, and welding bead ripple is large; 3, seam organization change greatly, and the removability of slag is poor; 4, SiO 2add separately, make SiO 2content is too much, and the oxidisability of slag is strengthened, oxidizable, scaling loss alloying element.
Summary of the invention
The object of the invention is the problems referred to above solving prior art existence, there is provided that a kind of welding technological properties is excellent, high-speed welding is effective, mate different weldings after the percentage composition of each main component meets the demands in overlay cladding strip surfacing sintered flux used for submerged arc welding, for important large component reparation and produce corrosion-resistant member, welding nuclear reactor, oil hydrogenation reactor, chemical fertilizer synthetic tower equal pressure container liner large-area built-up welding provide welding material.
The technology used in the present invention solution is: a kind of strip surfacing sintered flux used for submerged arc welding, composed of the following components by weight percentage:
Surplus is the SiO that above each composition self contains 2with inevitable impurity.
Described strip surfacing sintered flux used for submerged arc welding, composed of the following components by weight percentage:
Surplus is the SiO that above each composition self contains 2with inevitable impurity.
CaF 2: be a kind of meta-alkalescence salt, fusing point is low, and surface tension is little, the coefficient of expansion is large, is indispensable component in solder flux, by improving its addition, effectively can reduce the fusing point of solder flux, surface tension and viscosity, improve spreading out property and the fusion character of welding bead, and improve the removability of slag.
Al 2o 3: fusing point is high, and surface tension is large, and slant acidity in acid slag, meta-alkalescence in basic slag, oxidisability is little, little to deposited metal composition influence.By improving Al in solder flux 2o 3content, makes welding bead ripple more tiny, by controlling maximum adding quantity, prevents viscosity coefficient of dross increase, mobility is deteriorated, makes welding bead both sides of the edge and mother metal fusion comparatively steep, avoid causing the defect such as slag inclusion and undercut.
CaO: be basic anhydride, more stable, not easily decompose; By improving its addition, being conducive to slag and overflowing from molten bath.
Be 2o 3, TiO 2, BiO 2add as micro constitutent, to the change of control seam organization, improve deslag performance and play a significant role.
SiO 2: be acidic oxide, be a kind of main slag forming constituents in solder flux, suitably add the mobility being conducive to improving slag, but the oxidisability of slag when addition is too much, can be made to strengthen, oxidizable and scaling loss alloying element.Not to SiO in the present invention 2add especially, its content is brought into for other material, thus reaches optimum performance.
Beneficial effect of the present invention is:
(1) very uniform welding bead fusion penetration.
(2) lower mother metal dilution rate level, allows to reach chemical composition and performance requirement with less overlay cladding.
(3) higher deposition efficiency, means higher productivity ratio.
(4) chemical composition of uniform deposited metal.
(5) because of the line of solidification that overlay cladding is not concentrated, so overlay cladding has less crack sensitivity.
(6) very level and smooth overlay surface, can reduce bead welding quantity and overlap joint quantity.
(7) high can duplication of production power.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in detail.
Embodiment 1
A kind of strip surfacing sintered flux used for submerged arc welding, composed of the following components by weight percentage:
Binding agent uses the mixing water glass of K:Na=1:1, required raw material pulvis is carried out sieving and carries out proportioning by formula and weigh, mixer is put into after reviewing gross weight, add after dry mixing account for mixed weight 25% mixing water glass carry out wet-mixing, after wet-mixing evenly, wet-milling is sent into granulation disc by conveyer belt and carry out granulation, electrical heating garden cylinder drying stove is sent into through conveyer belt after granulation completes, dry at 230 DEG C, sieve after removing moisture, solder flux after screening within the scope of standard particle size is sent into sintering furnace, 1 hour is sintered at 1000 DEG C, come out of the stove after cooling and again sieve, finished product is through packaging, criticize inspection, warehouse-in, underproof weary powder sends into granulation again in mixer again.
Embodiment 2
A kind of strip surfacing sintered flux used for submerged arc welding, composed of the following components by weight percentage:
Binding agent uses the mixing water glass of K:Na=1:1, required raw material pulvis is carried out sieving and carries out proportioning by formula and weigh, mixer is put into after reviewing gross weight, add after dry mixing account for mixed weight 15% mixing water glass carry out wet-mixing, after wet-mixing evenly, wet-milling is sent into granulation disc by conveyer belt and carry out granulation, electrical heating garden cylinder drying stove is sent into through conveyer belt after granulation completes, dry at 120 DEG C, sieve after removing moisture, solder flux after screening within the scope of standard particle size is sent into sintering furnace, 1.5 hours are sintered at 800 DEG C, come out of the stove after cooling and again sieve, finished product is through packaging, criticize inspection, warehouse-in, underproof weary powder sends into granulation again in mixer again.
Embodiment 3
A kind of strip surfacing sintered flux used for submerged arc welding, composed of the following components by weight percentage:
Binding agent uses the mixing water glass of K:Na=1:1, required raw material pulvis is carried out sieving and carries out proportioning by formula and weigh, mixer is put into after reviewing gross weight, add after dry mixing account for mixed weight 20% mixing water glass carry out wet-mixing, after wet-mixing evenly, wet-milling is sent into granulation disc by conveyer belt and carry out granulation, electrical heating garden cylinder drying stove is sent into through conveyer belt after granulation completes, dry at 190 DEG C, sieve after removing moisture, solder flux after screening within the scope of standard particle size is sent into sintering furnace, 1 hour is sintered at 900 DEG C, come out of the stove after cooling and again sieve, finished product is through packaging, criticize inspection, warehouse-in, underproof weary powder sends into granulation again in mixer again.
Test as follows:
Solder flux: SJ611 (18 ~ 60 order)
Welding: 309L (0.5*60mm)
Mother metal: 16MnR
Bead-welding technology parameter:
Voltage Electric current Speed of welding Stem elongation Preheat temperature Thickness in monolayer
V A cm/min mm ℃ mm
26～28 850～900 17～25 35～40 120 3
The chemical composition (percentage by weight) of steel plate, welding
Material C Si Mn S P Cr Ni Nb Fe
16MnR 0.16 0.32 0.91 0.006 0.008 -- -- -- Surplus
309L 0.010 0.35 1.97 0.008 0.015 23.5 12.0 -- Surplus
Solder flux bead-welding technology performance:
Welding arc stablility, appearance of weld is good, and de-slag is easy, the defect such as pore-free, load mould, undercut, slag inclusion.
Contrast (percentage by weight) before cladding layer chemical composition improves and after improving
Before improving, mother metal dilution rate is large, and cladding layer chemical composition does not reach requirement, and after improving, mother metal dilution rate is little, and built-up welding one deck can reach requirement.Namely this content embodies one of feature of the present invention: lower mother metal dilution rate level, allows to reach chemical composition and performance requirement with less overlay cladding
These are only specific embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (2)

1. a strip surfacing sintered flux used for submerged arc welding, is characterized in that composed of the following components by weight percentage:
Surplus is the SiO that above each composition self contains 2with inevitable impurity.
2. one according to claim 1 strip surfacing sintered flux used for submerged arc welding, is characterized in that composed of the following components by weight percentage:
Surplus is the SiO that above each composition self contains 2with inevitable impurity.
CN201510685944.1A 2015-10-21 2015-10-21 A kind of strip surfacing sintered flux used for submerged arc welding Active CN105269179B (en)

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Application Number Priority Date Filing Date Title
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CN105269179B CN105269179B (en) 2017-08-18

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107175429A (en) * 2017-06-26 2017-09-19 天津市永昌焊丝有限公司 A kind of special submerged arc welding flux of resistance to sea atmosphere corrosion

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109514130B (en) * 2018-12-29 2021-05-18 天津市金桥焊材集团股份有限公司 Submerged arc welding flux special for carbon steel strip surfacing and application thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1040160A (en) * 1988-08-12 1990-03-07 国家机械工业委员会哈尔滨焊接研究所36693 A kind of high-basicity sintered flux
JPH07266083A (en) * 1994-03-29 1995-10-17 Kawasaki Steel Corp Flux for submerged arc welding
CN101985194A (en) * 2010-11-19 2011-03-16 天津市永昌焊丝有限公司 Surfacing flux special for alloy powder transition strip surfacing
CN102581518A (en) * 2012-03-23 2012-07-18 北京金威焊材有限公司 Sintered flux for stainless steel surfacing with band electrode
CN103753046A (en) * 2014-01-15 2014-04-30 四川大西洋焊接材料股份有限公司 Welding flux for carbon steel submerged arc strip surfacing and preparation method for welding flux

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1040160A (en) * 1988-08-12 1990-03-07 国家机械工业委员会哈尔滨焊接研究所36693 A kind of high-basicity sintered flux
JPH07266083A (en) * 1994-03-29 1995-10-17 Kawasaki Steel Corp Flux for submerged arc welding
CN101985194A (en) * 2010-11-19 2011-03-16 天津市永昌焊丝有限公司 Surfacing flux special for alloy powder transition strip surfacing
CN102581518A (en) * 2012-03-23 2012-07-18 北京金威焊材有限公司 Sintered flux for stainless steel surfacing with band electrode
CN103753046A (en) * 2014-01-15 2014-04-30 四川大西洋焊接材料股份有限公司 Welding flux for carbon steel submerged arc strip surfacing and preparation method for welding flux

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107175429A (en) * 2017-06-26 2017-09-19 天津市永昌焊丝有限公司 A kind of special submerged arc welding flux of resistance to sea atmosphere corrosion
CN107175429B (en) * 2017-06-26 2019-06-14 天津市永昌焊丝有限公司 A kind of dedicated submerged arc welding flux of resistance to sea atmosphere corrosion

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