CN105537798B - CAP1400 main equipment core level diphasic stainless steel electrodes - Google Patents

CAP1400 main equipment core level diphasic stainless steel electrodes Download PDF

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Publication number
CN105537798B
CN105537798B CN201510939796.1A CN201510939796A CN105537798B CN 105537798 B CN105537798 B CN 105537798B CN 201510939796 A CN201510939796 A CN 201510939796A CN 105537798 B CN105537798 B CN 105537798B
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low
stainless steel
carbon
weight
core level
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CN105537798A (en
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王卫华
陈元建
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SHANGHAI ATLANTIC WELDING CONSUMABLES CO Ltd
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SHANGHAI ATLANTIC WELDING CONSUMABLES CO Ltd
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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
    • B23K35/308—Fe as the principal constituent with Cr as next major constituent
    • B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
    • 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
    • B23K35/3603—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
    • B23K35/365—Selection of non-metallic compositions of coating 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
    • B23K35/22—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

It is used to weld nuclear power station CAP1400 main equipment core level diphasic stainless steel electrodes, including low-carbon and low-sulphur phosphorus core wire and low hydrogen sodium system coating the invention discloses one kind, the percentage by weight of each component is in low-carbon and low-sulphur phosphorus core wire：C：0~0.015%, Mn：1.20~2.00%, Si：0~0.10%, Cr：22.5~23.5%, Ni：8.50~9.50%, Co：0~0.015%, S：0~0.010%, P：0~0.015%, surplus is Fe and impurity；The percentage by weight of each component is in low hydrogen sodium system coating：Sodium cryolite powder 10~20%, marble powder 10~25%, Fluorspar Powder 35~55%, titanium-iron powder 0~1%, alginate 0.5~1.5%, titanium dioxide 1.0~3.0%, soda ash 0.3~0.8%, electrolytic manganese 0~2%, rutile 8~20%, ferrosilicon 3~7%, molybdenum-iron 0.5~1% and sodium silicate binding agent；Arc stability of the present invention, appearance of weld is attractive in appearance, operation is easy, de- slag and all-position welding effect are good；Deposited metal has good tensile property and low temperature impact properties.

Description

CAP1400 main equipment core level diphasic stainless steel electrodes
Technical field
The present invention relates to technical field of welding materials, specifically one kind meet in GB/T983-2012 to E2209-15 and What AWS A5.4-2006 were required E2209-15 is exclusively used in welding nuclear power station CAP1400 main equipment core level diphasic stainless steel electrodes.
Background technology
Planned by national nuclear power developing, will need to build 30 or so mega kilowatt nuclear power generators to the year two thousand twenty China, i.e., Just it is horizontal far below developed country in this way, the nuclear energy power generation accounting in China also only has 8%, and domestic nuclear power key equipment at present The welding material used in manufacture and installation mainly has Bole, Man Chete, Yi Sa, Lincoln etc. based on import；Country's welding material Expect that manufacturer generally researches and develops starting evening in nuclear power welding material, technological reserve deficiency, therefore the nuclear power welding material kind of high quality Class is seriously deficient, suitable for CAP1400 passive PWRs nuclear-power reactor pressure vessel, steam generator, voltage-stablizer, reactor core Extraordinary core level two phase stainless steel wlding relies primarily on import in the nuclear equipments such as water supply tank；At present, domestic and international two phase stainless steel electric welding Bar is roughly divided into marble fluorite type, lime-titania type and metatitanic acid type according to coating type, wherein, marble fluorite type covered electrode power Excellent performance is learned, but processing performance is poor, splashes big, electric arc is unstable；Metatitanic acid type covered electrode welding procedure is excellent, splashes It is small, arc stability, but stomata sensitivity is high；Although lime-titania type processing performance is preferable, mechanical property particularly toughness is not high, And all-position welding poor-performing；Publication No. CN101323058, patent are entitled：A kind of acid coating super-duplex stainless steel The Chinese patent and Publication No. CN101817123A, patent of welding rod are entitled：A kind of China of double-phase stainless steel electric welding bar is specially Ti0 in coating composition disclosed in profit2(rutile, titanium dioxide) and silicate (potassium feldspar, mica) occupy main body, coating type For metatitanic acid type；Publication No. CN101367161, patent are entitled：A kind of Chinese patent of low-hydrogen super diphasic stainless steel electrode Disclosed coating composition neutral and alkali compound (marble, fluorite) occupies main body, and coating type is marble fluorite alkalescence medicine Skin；Publication No. CN102019518A, patent are entitled：Coating disclosed in a kind of Chinese patent of double-phase stainless steel electric welding bar forms Neutral and alkali oxide (calcium oxide, calcirm-fluoride) occupies main body, is also marble fluorite type coating；From the above mentioned, it is necessary to the country Stainless steel electrode preparation technology and technology be improved, to change current CAP1400 passive PWRs nuclear-power reactor pressure Extraordinary core level two phase stainless steel wlding relies on import in the nuclear equipments such as force container, steam generator, voltage-stablizer, Core makeup tank Difficult situation.
The content of the invention
The defects of it is an object of the invention to exist for background technology, there is provided one kind welding nuclear power station CAP1400 master sets Standby core level diphasic stainless steel electrode, had both effectively improved weld(ing) deposit mechanical property, and had met CAP1400 main equipment core level two-phases The technical requirements of steel wlding, while there is good processing performance again, arc stability, slag covering are uniform, winged when realizing welding Splash that small, the removability of slag is excellent, weld seam is bright, beautiful appearance and the purpose of comprehensive good operation performance.
Ferrite of the two phase stainless steel containing about 50%, therefore intensity is high, but low-temperature flexibility is poor；Using common lime-titania type or Often mechanical property, particularly toughness are poor for the welding rod of metatitanic acid type slag system coating；And the welding rod of basic slag system coating recipe trial-production Often occur that arc stability is bad, and skull is hard, take off that slag is difficult, and residue cleaning is not clean；Appearance of weld out-of-flatness, surface-brightening Spend the shortcomings of bad.
To achieve the above object, the present invention provides following technical scheme：
To ensure weld seam good mechanical property and processing performance, the present invention uses low hydrogen sodium system coating, to each in coating The ratio of component carries out reasonable regulations.
The present invention uses low-carbon and low-sulphur phosphorus core wire, and the weight percent content of each chemical composition of core wire is respectively (wt%)：C (carbon) 0~0.015%, Mn (manganese) 1.20~2.00%, Si (silicon) 0~0.10%, Cr (chromium) 22.5~23.5%, Ni (nickel) 8.50~9.50%, Co (cobalt) 0~0.015%, S (sulphur) 0~0.010%, P (phosphorus) 0~0.015%, surplus Fe (iron) and impurity；The percentage by weight of each component is respectively in coating：Sodium cryolite powder 10~20%, marble powder 10~ 25%th, Fluorspar Powder 35~55%, titanium-iron powder 0~1%, alginate 0.5~1.5%, titanium dioxide 1.0~3%, soda ash 0.3~ 0.8%th, electrolytic manganese 0~2%, rutile 8~20%, ferrosilicon 3~7%, molybdenum-iron 0.5~1% and binding agent；The total amount of each composition For 100%.
The preparation method of the coating is：Each component in coating is mixed in proportion, addition account for gross weight 22~ 28% sodium silicate binding agent, Baume concentration are 41Be'~43Be', are uniformly mixed；Mixture is sent into plodder and pressed Conventional method is wrapped on core wire, is bakeed through low temperature and is bakeed finished product stainless steel electrode with high temperature.
As the further scheme of the present invention：In stainless steel electrode of the present invention the weight of coating for core wire weight 30~ 45%.
As further scheme of the invention：TiO in golden red stone flour in the present invention2>=91%；CaCO in marble powder3 >=96%；Ti contents are 25~35% in titanium-iron powder；TiO2≤ 46%；Na >=95% in sodium cryolite powder；TiO in titanium dioxide2≥ 99%；Na in soda ash2CO3>=98.5%；The Baume concentration of the sodium silicate binding agent is 41Be'~43Be'.
As further scheme of the invention：The temperature that the low temperature bakees is 80~120 DEG C, the temperature that high temperature bakees For 300~350 DEG C.
CAP1400 main equipments core level diphasic stainless steel electrode disclosed by the invention, deposited metal composition after welding Weight percent content is respectively：C≤0.04%；Mn0.5~2.0%；Si≤0.9%；S≤0.03%；P≤0.04%； Ni8.5~10.5%；Cr21.5~23.5%；Cu≤0.75%；Mo2.5-3.5%；N0.08-0.20%；Co≤0.05% and Impurity.
The main function of each composition is as follows in coating raw material of the present invention：
1. rutile：The main function of rutile is to stablize electric arc, slag making；Adjust the surface tension, viscosity, flowing of slag Property etc. physical property, improve removability of slag energy, improve appearance of weld, reduce and splash；But too many rutile easily deteriorates Deposited metal mechanical performance and crack resistance, therefore content of the rutile in coating is few, only 8~20%.
2. sodium cryolite：The main function of sodium cryolite is slag making, adjustment slag surface tension force, viscosity, mobility, improvement And improve removability of slag energy；But addition is easily caused that splashing increases, arc stability is deteriorated too much, thus addition control 10~ 20%.
3. marble：Marble main function is slag making, gas making, stable electric arc, improve slag basicity, improve it is de- Slag performance, and have preferable desulphurizing ability and indirect dephosphorization effect, decompose CO2Protection weld seam is not oxidized, nitridation, reduces weld seam Hydrogen content in metal；Content of the marble in coating is 10~25%.
4. titanium-iron powder：The main function of titanium-iron powder is deoxidier, and its deoxidation effect is better than ferrosilicon, and both coordinate guarantee to weld The redox reaction of termination process is fully carried out, and the optimum content of titanium-iron powder in the present invention is 0~1%.
5. titanium dioxide：Titanium dioxide main function is the painting pressure property for improving welding rod as plasticizer, ensures the outward appearance matter of welding rod Amount, higher because applying pressure needs and cost, unsuitable too many, titanium dioxide dosage is 1.5~3.0%.
6. fluorite：Appropriate Fluorspar Powder can reduce the surface tension of liquid metal, improve its mobility so that weld seam into Type is attractive in appearance, reduces weld porosity sensitiveness, and can reduce the diffusible hydrogen content of deposited metal, and Fluorspar Powder is in the present invention most Suitable content is 35~55%.
7. soda ash：For soda ash as lubricant, addition soda ash can increase the extrusion of welding rod in welding rod, while also have steady Arc acts on；Content of the soda ash in coating is 0.3~0.8%, and addition, which is crossed, at most causes the easy moisture absorption of coating.
8. electrolytic manganese：The addition of the electrolytic manganese mainly excessive manganese element into weld seam, improve intensity and the modeling of weld metal Property, while deoxidization desulfuration can be played a part of, accelerate welding reaction speed；Content of the electrolytic manganese in coating is 0~2%.
9. ferrosilicon：The addition of ferrosilicon primarily serves the effect of deoxidation, and its deoxidation products also assists in slag making.
10. alginate：The main function of alginate is that playing, which improves welding rod, applies pressure property as binding agent and gas-forming agent The effect of energy, excessively easily make coating intensity decreases, therefore control in 0.5~1.5%.
The present invention is coordinated so as to realize this by organic coating and the core wire special with low-carbon and low-sulphur phosphorus of combining of mentioned component The purpose of invention.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) relatively reasonable formula rate, there is good welding technological properties：Arc stability is good, and slag skull covers Lid is uniform；De- slag is good, appearance of weld is attractive in appearance, and all-position welding performance is good, and the mechanical property combined with good strength and toughness Energy；
(2) stainless steel electrode of the invention uses the special core wire of low-carbon and low-sulphur phosphorus, and the coating powder that impurity content is less Material so that the chemical composition stability of stainless steel electrode postwelding deposited metal of the present invention, superior performance and stably, system easy to control the quality, GB/T 983-2012 national standards and Unite States Standard AWS A5.4-2006 are complied fully with, can more meet nuclear power station CAP1400 master The core level two phase stainless steel technical requirements of equipment.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation Example.
A diameter of Φ 3.2mm low-carbon and low-sulphur phosphorus core wire is selected in following examples, its specific chemical composition is shown in
Shown in table 1：The specific chemical composition contrast (weight %) of each embodiment core wire in the present invention of table 1
Group C Mn Si S P Ni Cr Mo N Co
1 0.009 1.70 0.10 0.007 0.010 9.5 23.2 3.1 0.13 0.02
2 0.012 1.65 0.12 0.005 0.012 9.2 22.9 3.0 0.14 0.02
3 0.013 1.75 0.09 0.009 0.013 9.3 22.9 2.9 0.13 0.02
Low hydrogen sodium system coating in following examples, its specific chemical composition are shown in Table 2：
The specific chemical composition contrast (weight %) of each embodiment coating in the present invention of table 2
Respective corresponding embodiment 1, embodiment 2 and the embodiment 3 of being prepared into of table 1 and the other core wire of each group in table 2 and coating Stainless steel electrode, the preparation of stainless steel electrode are compressing on the oil pressure type electrode extrusion press of routine；Stainless steel electrode is through 150 Soldering test is carried out after DEG C low temperature drying and 350 DEG C of high temperature drying, the deposited metal of stainless steel electrode prepared by embodiment 1-3 Chemical composition is as shown in table 3.
Table 3 is the deposited metal composition (weight %) of stainless steel electrode in the embodiment of the present invention
C Mn Si S P Ni Cr Cu Mo N Co
Embodiment 1 0.023 1.50 0.52 0.012 0.020 9.0 22.8 0.02 3.2 0.14 0.02
Embodiment 2 0.026 1.60 0.65 0.014 0.022 8.9 22.7 0.02 3.1 0.145 0.02
Embodiment 3 0.026 1.55 0.60 0.013 0.020 9.0 22.65 0.02 3.2 0.14 0.02
In the present invention, the mechanical property and corrosion among crystalline grains of stainless steel electrode deposited metal prepared by embodiment 1-3 are such as Shown in table 4 and table 5.
Table 4 is the mechanical property of stainless steel electrode deposited metal in the embodiment of the present invention
Table 5 is the corrosion among crystalline grains of stainless steel electrode deposited metal in the embodiment of the present invention
Group Intergranular pitting corrosion test is carried out by ISO3651-2
Embodiment 1 It is qualified
Embodiment 2 It is qualified
Embodiment 3 It is qualified
The result of the test of each embodiment shows more than, CAP1400 main equipment core levels two phase stainless steel of the invention weldering The chemical composition stability of bar postwelding deposited metal, superior performance and stably, system easy to control the quality；Comply fully with GB/T 983-2012 National standard and Unite States Standard AWS A5.4-2006, and it is entirely capable of the core level two-phase stainless for meeting nuclear power station CAP1400 main equipments Steel technical requirements.
The better embodiment of this patent is explained in detail above, but this patent is not limited to above-mentioned embodiment party Formula, can also be on the premise of this patent objective not be departed from one skilled in the relevant art's possessed knowledge Various changes can be made.

Claims (6)

1. a kind of CAP1400 main equipments core level diphasic stainless steel electrode, including low-carbon and low-sulphur phosphorus core wire and low hydrogen sodium system coating, its It is characterised by：The low-carbon and low-sulphur phosphorus core wire, is prepared by following components in percentage by weight：
C：0~0.015% Mn：1.20~2.00% Si：0~0.10%
Cr：22.5~23.5% Ni：8.50~9.50% Co：0~0.015%
S：0~0.010% P：0~0.015%
Surplus is Fe and impurity；
The low hydrogen sodium system coating, is prepared by following components in percentage by weight：
2. CAP1400 main equipments core level diphasic stainless steel electrode according to claim 1, it is characterised in that the low hydrogen The weight of sodium system coating is the 30~45% of low-carbon and low-sulphur phosphorus core wire weight.
3. CAP1400 main equipments core level diphasic stainless steel electrode according to claim 1, it is characterised in that the low hydrogen In sodium system coating, TiO in golden red stone flour2>=91%；CaCO in marble powder3>=96%；In titanium-iron powder Ti contents be 25~ 35%；TiO2≤ 46%；Na >=95% in sodium cryolite powder；TiO in titanium dioxide2>=99%；Na in soda ash2CO3>=98.5%； The Baume concentration of the sodium silicate binding agent is 41Be '~43Be '.
4. according to the preparation method of any described CAP1400 main equipment core level diphasic stainless steel electrodes of claim 1-3, it is special Sign is, comprises the following steps：
1) preparation of low-carbon and low-sulphur phosphorus core wire：It is standby by formula dispensing, mixing, extrusion forming；
2) preparation of low hydrogen sodium system coating：Each component is mixed in proportion by formula, adds sodium silicate binding agent, Baume Concentration is 41Be '~43Be ', is uniformly mixed standby；
3) the low-carbon and low-sulphur phosphorus prepared in step 1 the mixture prepared in step 2 is sent into plodder and wrapped to weld On core, bakeed through low temperature and high temperature bakees finished product stainless steel electrode.
5. the preparation method of CAP1400 main equipments core level diphasic stainless steel electrode according to claim 4, its feature exist In the temperature that the low temperature bakees is 80~120 DEG C, and the temperature that high temperature bakees is 300~350 DEG C.
6. CAP1400 main equipments core level diphasic stainless steel electrode according to claim 1, it is characterised in that melted after welding The weight percent content of metallisation chemical composition is：C：0~0.04%；Mn：0.5~2.0%；Si：0~0.9%；S：0~ 0.03%；P：0~0.04%；Ni~8.5~10.5%；Cr：21.5~23.5%；Cu：0~0.75%；Mo：2.5-3.5%； N：0.08-0.20%；Co：0~0.05% and impurity.
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CN106312242B (en) * 2016-10-21 2018-06-05 中国化学工程第六建设有限公司 The welding method of 12Cr5Mo martensitic stain less steels
CN107252995B (en) * 2017-06-16 2019-11-05 上海大西洋焊接材料有限责任公司 A kind of stainless steel electrode for the cold fast breeder reactor welding of sodium
CN108544129A (en) * 2018-07-03 2018-09-18 青海海泉新材料科技有限公司 One kind being used for deposited metal wearing plate welding welding rod
CN109093279A (en) * 2018-09-13 2018-12-28 上海大西洋焊接材料有限责任公司 A kind of stainless steel electrode and preparation method for the cold fast breeder reactor welding of sodium
CN110369910A (en) * 2019-08-28 2019-10-25 哈尔滨威尔焊接有限责任公司 A kind of deposited metal of fast reactor stainless steel electrode
CN110524136B (en) * 2019-09-05 2021-08-06 昆山京群焊材科技有限公司 Heat-treatable ultralow-temperature anti-cracking ultrahigh-toughness austenitic stainless steel welding rod

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