CN114434043B - Welding rod for sulfuric acid reducing bacteria corrosion resistant steel - Google Patents
Welding rod for sulfuric acid reducing bacteria corrosion resistant steel Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 86
- 241000894006 Bacteria Species 0.000 title claims abstract description 13
- 239000010935 stainless steel Substances 0.000 title claims abstract description 7
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 title claims description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 238000000576 coating method Methods 0.000 claims abstract description 30
- 230000007797 corrosion Effects 0.000 claims abstract description 22
- 238000005260 corrosion Methods 0.000 claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 17
- 239000002184 metal Substances 0.000 claims abstract description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 11
- 239000001257 hydrogen Substances 0.000 claims abstract description 11
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 7
- 239000010962 carbon steel Substances 0.000 claims abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 8
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 7
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910001610 cryolite Inorganic materials 0.000 claims description 6
- 239000010436 fluorite Substances 0.000 claims description 6
- OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 claims description 5
- 229910001632 barium fluoride Inorganic materials 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 5
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 claims description 5
- 229910001637 strontium fluoride Inorganic materials 0.000 claims description 5
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims description 4
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 229940072056 alginate Drugs 0.000 claims description 4
- 235000010443 alginic acid Nutrition 0.000 claims description 4
- 229920000615 alginic acid Polymers 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 150000002910 rare earth metals Chemical class 0.000 claims description 4
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 235000010215 titanium dioxide Nutrition 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical compound [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims description 2
- 239000011230 binding agent Substances 0.000 claims 2
- 238000002156 mixing Methods 0.000 claims 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000003756 stirring Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 238000010891 electric arc Methods 0.000 abstract description 3
- 150000002431 hydrogen Chemical class 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 14
- 229910045601 alloy Inorganic materials 0.000 description 9
- 239000000956 alloy Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 6
- 239000010953 base metal Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 229910052814 silicon oxide Inorganic materials 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 239000011324 bead Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The invention is thatDisclosed is a sulfuric acid-reducing bacteria corrosion-resistant steel welding rod having high strength and excellent CO resistance 2 ‑H 2 S-SRB corrosiveness. The welding rod consists of a welding core and a coating, wherein the coating is coated on the outer wall of the welding core, and a high-quality ultralow P, S carbon steel welding core and ultralow hydrogen alkaline slag system is adopted. The welding rod has the advantages of excellent all-position welding process performance of a pipeline, stable electric arc, basically no splashing, excellent operability, excellent deslagging and attractive welding line forming. The deposited metal has high strength, ultra-low diffusion hydrogen (H is less than or equal to 4ml/100 g) and excellent CO resistance 2 ‑H 2 S-SRB corrosiveness, CO at 38deg.C 2 Partial pressure of 0.1MPa, H 2 S partial pressure of 0.1MPa, CO 2 、H 2 And (5) carrying out 168h corrosion test under S, SRB coexisting environment, wherein the uniform corrosion rate is less than 0.15mm/a, and the pitting corrosion rate is less than 0.5mm/a. The tensile strength is more than or equal to 650MPa, the extension is more than or equal to 22 percent, and the impact at minus 20 ℃ is more than or equal to 120J.
Description
Technical Field
The invention belongs to the field of welding materials, and particularly relates to a welding rod for sulfuric acid reducing bacteria corrosion resistant steel.
Background
With the deep exploitation of oil and gas fields, the exploitation working condition is increasingly severe, and the extracted oil gas is often accompanied with CO 2 And H 2 S corrosive gas. The gathering pipeline is mainly used for connecting pipelines between the oil-gas well and the oil-gas comprehensive treatment device, and the oil-gas which is not subjected to pretreatment such as dehydration, desalination, desulfurization and the like is conveyed, so that the service condition of the gathering pipeline is harsh. In recent years, domestic oil and gas fields are due to CO 2 -H 2 The accident of lost circulation of the gathering pipeline pipe caused by the S-SRB coexisting environment frequently occurs, and great economic loss and environmental protection pressure are brought to the oil and gas field. At present, the pure CO resistance 2 /H 2 S corrosion resistant seamless line pipe is not effective in solving CO 2 -H 2 Perforation problems caused by the S-SRB coexistence environment, therefore, the oil and gas field industry is highly desirous of obtaining a CO-resistant agent 2 -H 2 S-SRB corroded seamless line pipe.
The university of Petroleum and Baoshan Steel Co., ltd in 2018, jointly disclose a chemical composition named "an anti-CO 2 /H 2 S and sulfate reducing bacteria corroded seamless line pipe and manufacturing method thereof, wherein the chemical composition of the seamless line pipe is C:0.03 to 0.10 percent, si:0.1 to 0.5 percent, mn:0.10% -1.50%, P:002% or less, S: less than 0.005%, cr:1.0 to 4.0 percent, ni:0.1 to 1.5 percent, cu:0.15 to 2.0 percent, mo:0.05 to 0.4 percent of Ti:0.01 to 0.05 percent, RE:0.05 to 0.1 percent and the balance of Fe. Through reasonable alloy element collocation and proper heat treatment condition (after heating to 920-1000 ℃, heat preservation is carried out for 0.3-1 h according to the wall thickness of the steel pipe, and rapid cooling and tempering heat treatment are carried out), the alloy has high strength and CO resistance 2 -H 2 Seamless line pipe with excellent S-SRB corrosion performance. The seamless pipeline pipe can be used in the fields of oil-gas fluid transportation and the like.
However, unlike the smelting, rolling and heat treatment processes of the base metal, the oil and gas pipeline welding cannot perform heat treatment with high requirements due to the restriction of actual welding conditions, and the welding material welding is different from the base metal smelting, namely argon arc welding is performed by using a welding core which is homogeneous with the base metal, so that the complexity of the welding process and the non-uniformity of the welding joint seriously affect the CO resistance of the welding joint except the extremely low welding efficiency 2 -H 2 S-SRB corrosion performance, so development and CO resistance 2 -H 2 Welding materials matched with S-SRB corrosion steel are particularly important, and CO resistance of welding materials in a welding original state is optimized 2 -H 2 The S-SRB is corrosive, meanwhile, the welding material is ensured to have the strength and toughness matched with the base metal, the pipeline all-position weldability is optimized, and the welding material has quite far-reaching social and practical values.
Disclosure of Invention
In order to solve the technical problems, the invention provides a sulfuric acid reducing bacteria corrosion resistant steel welding rod which adopts a high-alkalinity low-hydrogen slag system and a high-quality ultra-low P, S carbon steel core wire, has excellent all-position welding process performance of a pipeline, and has high strength and excellent CO resistance of deposited metal 2 -H 2 S-SRB corrosiveness, and CO resistance 2 -H 2 And the performances of the S-SRB corrosion steel pipe base materials are matched.
The technical scheme of the invention is as follows: the electrode consists of a core wire and a coating, wherein the core wire is an ultralow P, S carbon steel H08E core wire, the coating is coated on the outer wall of the core wire, the coating accounts for 0.4-0.6 of the total weight coefficient of the electrode, and alloy elements are mainly transited by the coating;
(a) Based on the total weight of the welding core, the welding core comprises the following components in percentage by weight: c: less than or equal to 0.08 percent; si: less than or equal to 0.20 percent; mn:0.35 to 0.6 percent; p: less than or equal to 0.008 percent; s: less than or equal to 0.003%; P+S is less than or equal to 0.010%; fe: the balance;
(b) The composition of the coating adopts an ultra-low hydrogen alkaline slag system, and the coating comprises the following components in percentage by weight based on the total weight of the welding flux: calcium carbonate: 10-30%; barium carbonate: 12-20%; fluorite: 4-16%; barium fluoride: 4-13%; strontium fluoride: 6-10%; cryolite: 3-5%; rutile: 4-10%; titanium white powder: 1 to 3 percent; quartz powder: 3-8%; metal chromium: 4 to 6 percent; metallic nickel: 1 to 3 percent; copper: 5-8%; rare earth ferrosilicon: 3-8%; aluminum magnesium alloy: 0.5 to 2 percent; alginate: 0.5 to 2.5 percent; the balance of iron powder.
Preferably, the deposited metal of the welding rod comprises the following components in percentage by weight: c:0.03 to 0.08 percent; mn:0.3 to 1.2 percent; si:0.15 to 0.50 percent; p: less than or equal to 0.008 percent; s: less than or equal to 0.003%; P+S is less than or equal to 0.010%; ni:0.3 to 1.2 percent; cr:1.5 to 4.0 percent; cu:0.8 to 3.0 percent; RE is less than or equal to 300ppm.
Preferably, the core wire comprises the following components: c:0.054 to 0.063; si:0.08 to 0.17 percent; mn:0.35 to 0.70 percent; p: less than or equal to 0.008 percent; s: less than or equal to 0.003%; P+S is less than or equal to 0.010%; fe: the balance.
The high-quality ultralow P, S carbon steel core wire disclosed by the invention has the advantages that deposited metal alloy elements are mainly transited by the coating, so that on one hand, compared with a targeted smelting corrosion-resistant alloy core wire, the carbon steel core wire has obvious economic benefit, and on the other hand, the ultralow P, S component design is the basis for guaranteeing the excellent joint performance.
The invention adopts the high-alkalinity ultralow-hydrogen slag system, on one hand, ensures excellent welding seam quality (higher strength and toughness), and on the other hand, uses cryolite to partially replace fluorite, ensures H removal and utilizes K therein at the same time + To reduce F - The arc stability is destroyed, the arc stability during welding is improved, and the deposited metal of the welding rod has extremely low diffusion hydrogen, and the content H of the diffusion hydrogen is less than or equal to 4ml/100g.
The effect of the coating of the welding rod in the invention is mainly that gas making, slag making, deoxidizing, transition alloy to welding line, improving the all-position weldability of the welding rod, etc., and the effect of the main components of the coating in the application in the welding rod is specifically analyzed below.
The carbonate in the welding rod has the main functions of slagging and gas making, and CaO and BaO basic oxides produced by decomposition can improve the slag alkalinity, refine molten drops, have the function of removing S, P, improve the crack resistance of weld metal, and have the function of adjusting the melting point, viscosity, surface and section tension of slag. The content of carbonate in the invention is controlled between 22 and 50 percent;
the fluoride in the invention is mainly fluorite (CaF 2), strontium fluoride, barium fluoride and cryolite, the melting point of slag can be regulated, the slag melting point can be controlled, the welding seam air holes are reduced, the physical properties of slag are improved, the welding seam forming, deslagging and the like are improved, and because the alloy content of the welding seam metal of the welding rod is higher, the surface tension of liquid metal is larger, the fluidity is poor, the welding seam forming is poor, gas in the welding seam is not easy to escape, the fluoride obtained from fluorite, cryolite and the like can reduce the surface tension of the liquid metal, and the effect of regulating the viscosity of molten welding slag to improve the slag coverage is achieved, so that the welding seam forming is attractive, and the defect of forming air holes of the welding seam is reduced. The fluoride content in the welding rod is 17-44%;
the main component of rutile is TiO 2 The main functions of the method are arc stabilization, slag formation, and adjustment of melting point, viscosity, surface tension and fluidity of slag, improvement of weld joint formation and reduction of splashing; the hot deslagging performance is good, the welding arc can be stabilized, the molten pool is calm, transition molten drops can be thinned, the metal is transited in a fine mist form, the direction weldability is good, the beautifying weld joint formation is improved, the slag coverage is ensured, but the melting point of the coating is higher due to excessive use, a deeper sleeve is formed, and the mechanical property is easily reduced, so the content of the coating is controlled to be 4-10%;
silicon oxide obtained from quartz sand, potassium silicate sodium water glass, and the like can adjust the viscosity of molten slag so that slag coverage is good, and improve weld bead appearance and weld bead shape. However, when the proportion of the components of the silicon oxide is too high, the O content of the welding seam is too high, so that the mechanical properties of the welding seam, especially the low-temperature impact toughness, are reduced. The proportion of the silicon oxide component in the flux is thus controlled to a lower level;
the main function of the ferroalloy and other metal powder is deoxidization and transition alloy, the alloy element components in the welding line are ensured, the welding line strength is ensured, the optimal toughness matching is achieved through reasonable element design, the rare earth ferrosilicon is also used for transition of rare earth elements to the welding line besides deoxidization, and the functions of purification and impurity removal are achieved;
the adhesive adopts sodium-potassium water glass and alginate, and besides the application of the water glass to bond the welding rod, the water glass has the functions of slagging, adjusting slag state and stabilizing arc.
The reason why the composition of the coating composition of the electrode for steel resistant to corrosion by sulfuric acid-reducing bacteria of the present invention is limited is as described above. The remainder is iron and unavoidable impurities.
The welding rod for the sulfuric acid reducing bacteria corrosion resistant steel has excellent all-position welding process performance of a pipeline, stable electric arc, basically no splash, excellent operability, excellent deslagging and attractive welding line forming. The deposited metal has high strength, ultra-low hydrogen (H is less than or equal to 4ml/100 g) and excellent CO resistance 2 -H 2 S-SRB corrosiveness, CO at 38deg.C 2 Partial pressure of 0.1MPa, H 2 S partial pressure of 0.1MPa, CO 2 、H 2 And (5) carrying out 168h corrosion test under S, SRB coexisting environment, wherein the uniform corrosion rate is less than 0.15mm/a, and the pitting corrosion rate is less than 0.5mm/a. The tensile strength is more than or equal to 650MPa, the extension is more than or equal to 22 percent, the impact at minus 20 ℃ is more than or equal to 120J, can well resist CO with new development of Bao steel 2 -H 2 The performances of the S-SRB corrosion steel pipe base metal are matched, and the blank of the welding material for the steel with the corrosion resistance to sulfuric acid reducing bacteria is filled.
Detailed Description
The technical solutions of the present application are further described below with reference to specific embodiments, but the present application is not limited to these embodiments.
The welding rod for the steel resistant to the corrosion of the sulfuric acid reducing bacteria consists of a welding core and a coating, wherein the coating is coated on the outer wall of the welding core, the coating accounts for 0.4-0.6 of the total weight of the welding rod, and the welding core consists of the following components in percentage by weight based on the total weight of the welding core:
C：≤0.08％；
Si：≤0.20％；
Mn：0.35～0.70％；
P：≤0.008％；
S：≤0.003％；
P+S：≤0.010％；
fe: the balance;
based on the weight of the coating, the components and the purity of the welding flux are as follows in percentage by weight:
calcium carbonate (CaCO) 3 ≥98％)：10～30％；
Barium carbonate (BaCO) 3 ≥99％)：12～20％；
Fluorite (CaF) 2 ≥97％)：4～16％；
Barium fluoride (BaF) 2 ≥98％):4～13％
Strontium fluoride (SrF) 2 ≥98.5％)：6～10％
Cryolite (K) 3 AlF 6 ≥99％)：3～5％；
Rutile (TiO) 2 ≥95％)：4～10％；
Titanium dioxide (TiO) 2 ≥99.5％)：1～3％；
Quartz powder (SiO) 2 ≥98)：3～8％
Chromium metal (Cr is more than or equal to 99%): 4 to 6 percent;
metallic nickel (Ni is greater than or equal to 99%): 1 to 3 percent;
metallic copper (Cu is more than or equal to 99%): 5-8%;
rare earth ferrosilicon: 3-8%;
aluminum magnesium alloy (Al+Mg is more than or equal to 99.5%): 0.5 to 2 percent;
alginate (pure): 0.5 to 2.5 percent;
iron flame: the balance.
The deposited metal of the welding rod comprises the following components in percentage by weight: c:0.03 to 0.08 percent; mn:0.3 to 1.2 percent; si:0.15 to 0.50 percent; p: less than or equal to 0.008 percent; s: less than or equal to 0.003%; P+S is less than or equal to 0.010%; ni:0.3 to 1.2 percent; cr:1.5 to 4.0 percent; cu:0.8 to 3.0 percent; RE is less than or equal to 300ppm.
The core wire compositions (weight percent%) of examples 1-5 are shown in table 1.
Table 1: core wire composition example (wt%)
The coating adopts a high-alkalinity low-hydrogen slag system, the coating accounts for 0.4-0.6 of the total weight of the welding rod, the diameter of a core wire is 2.6mm,3.2mm and 4.0mm, and the composition examples of the coating are shown in Table 2.
Table 2: skin composition example (wt%)
Continuing with table 2: skin composition example (wt%)
The deposited metal chemistry of each example is shown in table 3.
Table 3: various examples deposit metal chemistry (wt.%)
The embodiments correspond to the mechanical property, low-temperature impact and CO of deposited metal 2 -H 2 The S-SRB corrosion test results are shown in Table 4.
Table 4: example Performance test results
As can be seen from the above examples, the welding rod of the invention adopts a high-alkalinity low-hydrogen slag system and a high-quality ultra-low P, S carbon steel core wire, and the main coating of the alloy element is in joint transition, so that the welding rod has excellent all-position welding process performance of a pipeline, stable electric arc, basically no splashing, excellent operability, excellent deslagging and attractive welding line forming. The deposited metal has high strength and excellent CO resistance 2 -H 2 S-SRB corrosiveness, CO at 38deg.C 2 Partial pressure of 0.1MPa, H 2 S partial pressure of 0.1MPa, CO 2 、H 2 And (5) carrying out a 168h corrosion test in a S, SRB coexisting environment, wherein the uniform corrosion rate is less than 0.15mm/a, the pitting corrosion rate is less than 0.5mm/a, the tensile strength is more than or equal to 650MPa, the extension is more than or equal to 22%, and the impact at minus 20 ℃ is more than or equal to 120J.
The above-described examples are only preferred embodiments of the present application, and it should be noted that it is possible for a person skilled in the art to make several variations and modifications without departing from the inventive concept of the present application, which fall within the protection scope of the present application.
Claims (3)
1. The welding rod for the steel resistant to corrosion of sulfuric acid reducing bacteria comprises a welding core and a coating, wherein the welding core is an ultralow P, S carbon steel H08E welding core, and the coating is coated on the outer wall of the welding core;
(a) Based on the total weight of the welding core, the welding core comprises the following components in percentage by weight: c: less than or equal to 0.08 percent; si: less than or equal to 0.20 percent; mn:0.35 to 0.70 percent; p: less than or equal to 0.008 percent; s: less than or equal to 0.003%; P+S is less than or equal to 0.010%; fe: the balance;
(b) The composition of the coating adopts an ultra-low hydrogen alkaline slag system, and the coating comprises the following components in percentage by weight based on the total mass of the coating: calcium carbonate: 10-30%; barium carbonate: 12-20%; fluorite: 4-16%; barium fluoride: 4-13%; strontium fluoride: 6-10%; cryolite: 3-5%; rutile: 4-10%; titanium white powder: 1 to 3 percent; quartz powder: 3-8%; metal chromium: 4-6%; metallic nickel: 1-3%; copper: 5-8%; rare earth ferrosilicon: 3-8%; aluminum magnesium alloy: 0.5 to 2 percent; alginate: 0.5% -2.5%; the balance of iron powder;
the deposited metal of the welding rod comprises the following components in percentage by weight: c: 0.03-0.08%; mn:0.3 to 1.2 percent; si:0.15 to 0.50 percent; p: less than or equal to 0.008 percent; s: less than or equal to 0.003%; P+S is less than or equal to 0.010%; ni: 0.3-1.2%; cr: 1.5-4.0%; cu: 0.8-3.0%; RE is less than or equal to 300ppm.
2. The electrode for steel resistant to corrosion by sulfuric acid reducing bacteria according to claim 1, wherein the core wire comprises the following components: c:0.054 to 0.063; si: 0.08-0.17%; mn:0.35 to 0.70 percent; p: less than or equal to 0.008 percent; s: less than or equal to 0.003%; P+S is less than or equal to 0.010%; fe: the balance.
3. The welding rod for sulfuric acid reducing bacteria corrosion resistant steel according to any one of claims 1 to 2, characterized in that the preparation method of the welding rod comprises the following steps:
1) Uniformly mixing the components of the coating according to a proportion;
2) Adding a binder accounting for 15-30% of the weight of the coating, stirring and mixing uniformly, and uniformly coating the powder on the welding core by an oil pressure coating machine under the pressure of 12-15 mpa; the binder adopts potassium-sodium mixed water glass, the modulus is 2.75-3.30, and the concentration is 37-45 Be;
3) The material is prepared by high-low temperature baking, the low temperature baking temperature is 60-100 ℃ multiplied by 2 hours, and the high temperature baking temperature is 250-400 ℃ multiplied by 1 hour.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294088A (en) * | 1990-04-11 | 1991-12-25 | Nippon Steel Corp | Low hydrogen type coated arc welding electrode |
| CN101181767A (en) * | 2007-12-14 | 2008-05-21 | 国网北京电力建设研究院 | Ultra-low hydrogen basic electrode for WB36 steel welding |
| CN103934592A (en) * | 2014-04-18 | 2014-07-23 | 上海电力修造总厂有限公司 | Core wire and coating of 55-kilogram-level weather resistant steel welding rod, welding rod and preparing method |
| CN110181201A (en) * | 2019-07-04 | 2019-08-30 | 天津市金桥焊材集团有限公司 | One kind is for coastal engineering high tenacity corrosion resistant welding rod and application thereof |
| CN113458656A (en) * | 2021-07-09 | 2021-10-01 | 昆山京群焊材科技有限公司 | 2.25% Cr-1% Mo-V steel electrode for hydrogenation reactor and preparation method thereof |
-
2022
- 2022-01-24 CN CN202210079497.5A patent/CN114434043B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03294088A (en) * | 1990-04-11 | 1991-12-25 | Nippon Steel Corp | Low hydrogen type coated arc welding electrode |
| CN101181767A (en) * | 2007-12-14 | 2008-05-21 | 国网北京电力建设研究院 | Ultra-low hydrogen basic electrode for WB36 steel welding |
| CN103934592A (en) * | 2014-04-18 | 2014-07-23 | 上海电力修造总厂有限公司 | Core wire and coating of 55-kilogram-level weather resistant steel welding rod, welding rod and preparing method |
| CN110181201A (en) * | 2019-07-04 | 2019-08-30 | 天津市金桥焊材集团有限公司 | One kind is for coastal engineering high tenacity corrosion resistant welding rod and application thereof |
| CN113458656A (en) * | 2021-07-09 | 2021-10-01 | 昆山京群焊材科技有限公司 | 2.25% Cr-1% Mo-V steel electrode for hydrogenation reactor and preparation method thereof |
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