CN115319331A - Submerged arc welding flux for vanadium-chromium-molybdenum steel, preparation method, wire agent combination and application - Google Patents
Submerged arc welding flux for vanadium-chromium-molybdenum steel, preparation method, wire agent combination and application Download PDFInfo
- Publication number
- CN115319331A CN115319331A CN202211091785.9A CN202211091785A CN115319331A CN 115319331 A CN115319331 A CN 115319331A CN 202211091785 A CN202211091785 A CN 202211091785A CN 115319331 A CN115319331 A CN 115319331A
- Authority
- CN
- China
- Prior art keywords
- parts
- submerged arc
- arc welding
- vanadium
- chromium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000003466 welding Methods 0.000 title claims abstract description 101
- 230000004907 flux Effects 0.000 title claims abstract description 64
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 43
- 239000010959 steel Substances 0.000 title claims abstract description 43
- VGIPUQAQWWHEMC-UHFFFAOYSA-N [V].[Mo].[Cr] Chemical compound [V].[Mo].[Cr] VGIPUQAQWWHEMC-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 12
- 238000002360 preparation method Methods 0.000 title abstract description 10
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 36
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 28
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000010436 fluorite Substances 0.000 claims abstract description 22
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 19
- -1 rare earth fluoride Chemical class 0.000 claims abstract description 19
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 19
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 18
- NCJRLCWABWKAGX-UHFFFAOYSA-N [Si].[Ca].[Ba] Chemical compound [Si].[Ca].[Ba] NCJRLCWABWKAGX-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000004927 clay Substances 0.000 claims abstract description 17
- 239000010456 wollastonite Substances 0.000 claims abstract description 17
- 229910052882 wollastonite Inorganic materials 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 16
- 239000002131 composite material Substances 0.000 claims abstract description 15
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 14
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000001257 hydrogen Substances 0.000 claims abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 10
- 239000000843 powder Substances 0.000 claims description 8
- 239000011230 binding agent Substances 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 6
- 239000001095 magnesium carbonate Substances 0.000 claims description 5
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 5
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 5
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 4
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical group [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims description 4
- 238000007580 dry-mixing Methods 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004111 Potassium silicate Substances 0.000 claims 1
- 229910052913 potassium silicate Inorganic materials 0.000 claims 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 43
- 239000002184 metal Substances 0.000 abstract description 43
- 238000010438 heat treatment Methods 0.000 abstract description 20
- 230000035945 sensitivity Effects 0.000 abstract description 18
- 239000002893 slag Substances 0.000 description 27
- 238000012360 testing method Methods 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 13
- 230000007547 defect Effects 0.000 description 10
- 238000005984 hydrogenation reaction Methods 0.000 description 8
- 229910052698 phosphorus Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000011572 manganese Substances 0.000 description 7
- 238000012216 screening Methods 0.000 description 7
- 229910052720 vanadium Inorganic materials 0.000 description 7
- 238000007689 inspection Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 238000009864 tensile test Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 229910052745 lead Inorganic materials 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 238000007373 indentation Methods 0.000 description 4
- 229910052748 manganese Inorganic materials 0.000 description 4
- 238000009472 formulation Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 229910004762 CaSiO Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- FQNGWRSKYZLJDK-UHFFFAOYSA-N [Ca].[Ba] Chemical compound [Ca].[Ba] FQNGWRSKYZLJDK-UHFFFAOYSA-N 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 235000012241 calcium silicate Nutrition 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000010951 particle size reduction Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910000859 α-Fe 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
- B23K35/36—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
- 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
- B23K9/00—Arc welding or cutting
- B23K9/18—Submerged-arc welding
Abstract
The invention discloses a submerged arc welding flux for vanadium-chromium-molybdenum steel, a preparation method, a wire agent combination and an application thereof, wherein the submerged arc welding flux for vanadium-chromium-molybdenum steel comprises the following components in parts by weight: 23-35 parts of fluorite, 18-34 parts of fused magnesia, 15-24 parts of alumina, 5-15 parts of wollastonite, 2-8 parts of clay, 3-12 parts of calcium carbonate, 0.5-2 parts of electrolytic manganese, 0.5-3 parts of rare earth fluoride and 0.3-2 parts of composite silicon barium calcium deoxidizer. The submerged arc welding agent is adopted to weld vanadium-chromium-molybdenum-steel in an alternating current manner, the welding process performance is excellent, the purity of weld metal is high, the mechanical property of a heat treatment state is good, the low-temperature impact toughness is stable, the reheat crack sensitivity is low, and the manufacturing technical requirements of high-temperature and high-pressure hydrogen equipment are met.
Description
Technical Field
The invention relates to the technical field of wire agent combination, in particular to a submerged arc welding flux for vanadium-chromium-molybdenum steel, a preparation method, a wire agent combination and application.
Background
The high-temperature high-pressure hydrogenation equipment mainly comprises a large hydrogenation reactor, a hydrogenation heat exchanger, a hydrogenation separator and the like, is core equipment in the oil refining industry, particularly the large hydrogenation reactor is in a high-temperature (400-482 ℃), high-pressure (10-25 MPa) and hydrogenation environment, and has extremely bad use conditions. With the trend of increasing the size and the parameters of refining equipment along with the increasing deterioration of crude oil quality, vanadium-chromium-molybdenum steel (2.25 Cr-1 Mo-0.25V) with higher strength, higher use temperature and better hydrogen damage resistance is gradually the first choice for manufacturing high-temperature and high-pressure hydrogenation equipment.
The main welding seam of 2.25Cr-1Mo-0.25V steel is mainly manufactured by adopting AC submerged arc welding, has higher cold crack tendency, the low-temperature impact toughness is extremely sensitive to the change of welding flux components of a welding wire, and the wall thickness of a container is mostly 100-300mm, which puts higher requirements on the stability of the low-temperature impact toughness of welding seam metal in different heat treatment states. Meanwhile, the maximum heat treatment state heat preservation time is prolonged from 32h to 34h by the latest design standard, and more severe requirements are provided for the strength and high-temperature durability of the weld metal. In addition, the reheat crack sensitivity of the welded joint is increased due to the addition of the strong carbide forming elements such as V, the reheat crack is found in the metal part of the submerged arc welding seam of a plurality of thick-wall 2.25Cr-1Mo-0.25V steel reactors in Europe, and the reheat crack is not found in China when the equipment is inspected on site.
Disclosure of Invention
The invention aims to provide a submerged arc welding flux for vanadium-chromium-molybdenum steel, and by adopting the submerged arc welding flux to weld the vanadium-chromium-molybdenum steel, weld metal not only has mechanical properties capable of meeting the requirements of high-temperature and high-pressure hydrogen equipment, but also has good welding process performance and lower reheat crack sensitivity.
In addition, the invention also provides a preparation method of the submerged arc welding flux, and a submerged arc welding wire flux combination and application.
The invention is realized by the following technical scheme:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
23 to 35 parts of fluorite, 18 to 34 parts of fused magnesia, 15 to 24 parts of alumina, 5 to 15 parts of wollastonite, 2 to 8 parts of clay, 3 to 12 parts of calcium carbonate, 0.5 to 2 parts of electrolytic manganese, 0.5 to 3 parts of rare earth fluoride and 0.3 to 2 parts of composite silicon barium calcium deoxidizer.
The individual components of the submerged arc welding flux of the present invention are commercially available.
When the submerged arc welding flux with the proportion is adopted to weld vanadium-chromium-molybdenum steel, the mechanical property of weld metal can meet the requirement of high-temperature and high-pressure hydrogen equipment, and meanwhile, the submerged arc welding flux has good welding process performance and lower reheat crack sensitivity.
In the submerged arc welding flux with the proportion, the functions of the components are as follows:
fluorite: the important slag former can adjust the melting point, viscosity and surface tension of the slag and improve the fluidity of the slag; with SiO in the slag 2 Reacting to produce SiF 4 Gas, hydrogen hole tendency is effectively reduced; meanwhile, the alkalinity of the slag can be improved, and the desulfurization effect is achieved.
Electric smelting of magnesia: the good slag-forming material contains extremely low contents of harmful elements such As P, pb, bi, sb, sn, as, S and the like after remelting, rough removing and extracting treatment, can improve the alkalinity of slag, and is beneficial to improving the impact toughness of weld metal. Because the melting point of the fused magnesia is higher, the solidification temperature of the slag can be obviously improved and the viscosity of the slag can be increased in an alkaline slag system. When the addition amount of the fused magnesia is too high, the wettability of the welding line is poor, and slag ash is attached to the surface of the welding line.
Alumina: amphoteric oxide, important slagging agent, properly increased alumina content, finer scale ripple of welding seam, and improved slag-removing performance. If the alumina content is too high, the melting point of slag is increased and the weld bead convexity is increased.
Wollastonite: belongs to calcium metasilicate mineral and has a chemical formula of CaSiO 3 . Because of containing higher CaO content, the alkalinity of the slag can be improved, the welding process performance can be improved, and the metal toughness of the welding seam can be improved. In sintered flux, it is also possible to increase the strength of the flux particles and to reduce the degree of particle size reduction.
Clay: the alumino-silicate mineral is mainly used for adjusting the physical properties of slag and improving the welding process performance.
Calcium carbonate: the main functions are slagging and gas making, slag alkalinity improvement and desulphurization. In the invention, a large amount of CO is decomposed in the welding process by adding more calcium carbonate 2 A gas, canReacts with hydrogen protons existing in a molten pool during the AC submerged arc welding, thereby reducing the sensitivity of AC submerged arc welding blowholes.
Electrolytic manganese: the common deoxidizer can reduce oxide inclusions in the welding seam. Mn promotes acicular ferrite to be formed in the microstructure, thereby improving the stability of low-temperature impact toughness; however, too high Mn content promotes the progress of segregation and is not favorable for temper embrittlement.
Rare earth fluoride: and by adding a proper amount of rare earth fluoride, the directionality of columnar crystals can be obviously improved, the crystal grains are refined, and the cold crack resistance of a welding joint is improved. Meanwhile, the method can purify the crystal boundary of the molten pool, and reduce the content of harmful elements such As Pb, bi, sb, sn, as and the like which are highly related to the reheat crack sensitivity.
Compound silicon barium calcium deoxidizer: has important effects on changing the shape distribution of the inclusions in the welding seam, refining crystal grains, improving the mechanical property of the welding seam metal and improving the quality of the welding seam. Particularly, the stable calcium treatment can avoid a large amount of fine MnS particles in the steel from precipitating along austenite grain boundaries in the welding thermal cycle process, reduce the free S content in the steel, avoid Pb, bi, sb, sn, as, S and other harmful elements from segregating to the prior austenite grain boundaries, and obviously reduce the reheat crack sensitivity.
According to the invention, rare earth fluoride and a composite silicon-barium-calcium deoxidizer are added, so that the contents of harmful elements such As Pb, bi, sb, sn, as, S and the like and the grain boundary enrichment degree can be controlled and reduced, on one hand, the tempering embrittlement sensitivity coefficient (X is less than 12ppm, J is less than or equal to 120) can be reduced, and the tempering embrittlement tendency is reduced; on the other hand, when the impurity element contents of Pb, bi and Sb in the weld are low and K = Pb + Bi +0.03Sb is less than or equal to 1.5ppm, reheat cracks are generally not generated.
X=（10P+5Sb+4Sn+As）×10 -2 In the formula, elements are substituted by ppm content;
J=（Si+Mn）×（P+Sn）×10 4 in the formula, the elements are substituted by mass percentage.
Further, the following components in parts by weight:
35 parts of fluorite, 33 parts of fused magnesia, 16 parts of alumina, 5 parts of wollastonite, 5 parts of clay, 4 parts of calcium carbonate, 0.5 part of electrolytic manganese, 1 part of rare earth fluoride and 0.5 part of composite silicon barium calcium deoxidizer.
Further, the paint comprises the following components in parts by weight:
23 parts of fluorite, 26 parts of fused magnesite, 20 parts of alumina, 9 parts of wollastonite, 3 parts of clay, 12 parts of calcium carbonate, 2 parts of electrolytic manganese, 3 parts of rare earth fluoride and 2 parts of composite silicon barium calcium deoxidizer.
Further, the paint comprises the following components in parts by weight:
28 parts of fluorite, 18 parts of fused magnesia, 23 parts of alumina, 13 parts of wollastonite, 7 parts of clay, 7 parts of calcium carbonate, 1 part of electrolytic manganese, 2 parts of rare earth fluoride and 1 part of composite silicon barium calcium deoxidizer.
The preparation method of the submerged arc welding flux for the vanadium chromium molybdenum steel comprises the following steps:
s1, adding the components of the submerged arc welding flux for vanadium-chromium-molybdenum steel into a material cylinder according to parts by weight, and performing dry mixing to obtain powder;
s2, adding a binder into the powder, stirring and granulating;
s3, baking at 520-600 ℃, preserving heat for 1 hour, and sieving by a 20-60-mesh sieve to obtain the finished flux.
Furthermore, in step S2, the binder is potassium sodium silicate, and the addition amount of the binder is 22-30% of the weight of the powder.
Furthermore, the modulus of the sodium-potassium water glass is 3.1, and the concentration is 40-43 DEG Be.
A wire agent combination comprises the submerged arc welding flux for the vanadium-chromium-molybdenum steel and a submerged arc welding wire matched with the submerged arc welding flux.
Further, the submerged arc welding wire is CHW-SB3V.
The welding wire CHW-SB3V (diameter: 4.0 mm) meets the metallurgical grade requirement of the hot-strength steel solid welding wire H10Cr3MoV for submerged arc welding, and the control range of chemical components is C:0.05 to 0.13%, mn:0.50-1.25%, si:0.05-0.25%, S is less than or equal to 0.005%, P is less than or equal to 0.005%, cr:2.00-2.60%, mo:0.90-1.20%, nb:0.01-0.03%, V:0.20 to 0.40 percent of Ti, less than or equal to 0.030 percent of Ti, less than or equal to 0.15 percent of Cu, less than or equal to 0.20 percent of Ni, less than or equal to 0.005 percent of Sb, less than or equal to 0.005 percent of Sn, less than or equal to 0.005 percent of As, less than or equal to 0.002 percent of B, less than or equal to 0.0001 percent of Pb, and less than or equal to 0.0001 percent of Bi.
The submerged arc welding flux or wire agent combination for the vanadium-chromium-molybdenum steel is applied to the welding of the vanadium-chromium-molybdenum steel for high-temperature high-pressure hydrogenation equipment.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the submerged arc welding flux disclosed by the invention is matched with a special submerged arc welding wire CHW-SB3V to weld vanadium-chromium-molybdenum-added steel, the purity of weld metal is high, the mechanical property is excellent, the weld metal has better low-temperature impact toughness and tensile strength at minus 30 ℃ in a maximum heat treatment state (705 ℃ x 34 h) and a minimum heat treatment state (705 ℃ x 8 h), the tempering embrittlement tendency is low (VTr 54+3.0 delta VTr54 is less than or equal to 0 ℃), and the duration time of a 540-DEG C high-temperature endurance test of the weld metal in the maximum heat treatment state exceeds 1000h.
2. Weld metal passes a reheat crack screening test and has lower reheat crack sensitivity.
3. The submerged-arc welding flux of the invention has the advantages of excellent performance, strong air hole resistance, easy slag removal of a narrow-gap deep groove and beautiful weld formation.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Example 1:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
35 parts of fluorite, 33 parts of fused magnesia, 16 parts of alumina, 5 parts of wollastonite, 5 parts of clay, 4 parts of calcium carbonate, 0.5 part of electrolytic manganese, 1 part of rare earth fluoride and 0.5 part of composite silicon barium calcium deoxidizer.
The preparation method of the submerged arc welding flux for the vanadium chromium molybdenum steel comprises the following steps:
s1, adding the components of the submerged arc welding flux for the vanadium-chromium-molybdenum steel into a material cylinder according to parts by weight, performing dry mixing for 8-15 minutes, and uniformly mixing to obtain powder;
s2, adding a binder (potassium sodium silicate, the modulus is 3.1, and the concentration is 40-43 DEG Be) according to the proportion of 22-30% of the powder weight, stirring and granulating;
s3, baking for 1 hour at 600 ℃, and sieving by using a 20-60-mesh sieve to obtain the finished product of the welding flux.
The obtained flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base material 2.25Cr-1 Mo-0.25V), the slag is easy to remove, and the surface of a welding line has slight indentation. The defects of air holes, slag inclusion and the like are not found through ultrasonic inspection. The deposited metal comprises the following chemical components: c:0.076%, mn:0.90%, si:0.075%, S:0.008%, P:0.006%, cr:2.42%, mo:1.02%, nb:0.012%, V:0.33%, ti:0.0001 % of Cu:0.05%, ni:0.15 % of Sb:0.0007%, sn:0.0008%, as:0.0010%, B:0.0001%, pb:0.00004%, bi:0.00003%, ce:0.005%, X coefficient 6.77ppm, J coefficient 66.3, and K coefficient 0.91ppm. The mechanical properties of the deposited metal in the maximum heat treatment state (705 ℃ multiplied by 34 h) and the minimum heat treatment state (705 ℃ multiplied by 8 h) are shown in table 1 and all meet the technical requirements. The maximum heat-treated weld metal does not break at the high-temperature endurance test of 540 ℃ in 1000h, and the tempering embrittlement tendency is lower (VTr 54+3.0 delta VTr54= -33 ℃).
Table 1 example 1 deposited metal mechanical properties
The reheating crack sensitivity evaluation is carried out by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the two samples have a respective reduction of area, roA, of 36% and 30%, which pass the screening test (mean values of not less than 32% are required, individual values of not less than 29%).
Example 2:
the present example is based on example 1, and differs from example 1 in the formulation of the submerged arc flux and the baking temperature, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
23 parts of fluorite, 26 parts of fused magnesite, 20 parts of alumina, 9 parts of wollastonite, 3 parts of clay, 12 parts of calcium carbonate, 2 parts of electrolytic manganese, 3 parts of rare earth fluoride and 2 parts of composite silicon barium calcium deoxidizer.
The preparation method of the submerged arc welding flux for the vanadium chromium molybdenum steel comprises the following steps:
s3, baking for 1 hour at 520 ℃, and sieving by using a 20-60-mesh sieve to obtain the finished product of the welding flux.
The obtained finished flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base material 2.25Cr-1 Mo-0.25V), the slag is easy to remove, the formed welding line is attractive, and slight smoke exists. The defects of air holes, slag inclusion and the like are not found through ultrasonic inspection. The deposited metal comprises the following chemical components: c:0.086%, mn:1.25%, si:0.28%, S:0.005%, P:0.004%, cr:2.40%, mo:1.00%, nb:0.011%, V:0.32%, ti:0.0002 % of Cu:0.038%, ni:0.12%, sb:0.0007%, sn:0.0006%, as:0.0007%, B:0.0001%, pb:0.00006%, bi:0.00003%, ce:0.012%, X coefficient 4.66ppm, J coefficient 70.38, K coefficient 1.11ppm. The mechanical properties of the deposited metal in the maximum heat treatment state (705 ℃ multiplied by 34 h) and the minimum heat treatment state (705 ℃ multiplied by 8 h) are shown in Table 2 and all meet the technical requirements. The maximum heat-treated weld metal does not break at the high temperature endurance test of 540 ℃ in 1000h, and the tempering embrittlement tendency is lower (VTr 54+3.0 delta VTr54= -41 ℃).
Table 2 example 2 mechanical properties of deposited metal
The reheat crack sensitivity evaluation is carried out by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the two samples had a percent reduction of area, roA, of 35% and 33%, respectively, and passed the screening test.
Example 3:
the present example is based on example 1, and differs from example 1 in the formulation of the submerged arc flux and the baking temperature, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
28 parts of fluorite, 18 parts of fused magnesia, 23 parts of alumina, 13 parts of wollastonite, 7 parts of clay, 7 parts of calcium carbonate, 1 part of electrolytic manganese, 2 parts of rare earth fluoride and 1 part of composite silicon barium calcium deoxidizer.
The preparation method of the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following steps:
s3, baking for 1 hour at 560 ℃, and sieving by a 20-60 mesh sieve to obtain the finished flux.
The obtained finished flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base material 2.25Cr-1 Mo-0.25V), the slag is easy to remove, the weld joint is attractive in appearance, and no defects such as air holes, slag inclusion and the like are found through ultrasonic inspection. The deposited metal comprises the following chemical components: c:0.080%, mn:1.06%, si:0.15%, S:0.006%, P:0.006%, cr:2.38%, mo:1.02%, nb:0.013%, V:0.35%, ti:0.0001 Percent, cu:0.030%, ni:0.13%, sb:0.0009%, sn:0.0006%, as:0.0008%, B:0.0001%, pb:0.00008%, bi:0.00004%, ce:0.008%, X coefficient 6.77ppm, J coefficient 79.86, and K coefficient 1.47ppm. The mechanical properties of the deposited metal in the maximum heat treatment state (705 ℃ multiplied by 34 h) and the minimum heat treatment state (705 ℃ multiplied by 8 h) are shown in the table 3, and all meet the technical requirements. The maximum heat treatment state weld metal at 540 ℃ does not break in a high temperature endurance test at 1000h, and the tempering embrittlement tendency is lower (VTr 54+3.0 delta VTr54= -36 ℃).
Table 3 example 3 mechanical properties of deposited metal
The reheat crack sensitivity evaluation is carried out by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the two samples had a reduction of area, roA, of 32% and 33%, respectively, and passed the screening test.
Comparative example 1:
this comparative example is based on example 2 and differs from example 2 in that the submerged arc flux contains no rare earth fluoride and no complex barium silicon calcium deoxidizer, and is replaced by an equal amount of fluorite, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
28 parts of fluorite, 26 parts of fused magnesia, 20 parts of alumina, 9 parts of wollastonite, 3 parts of clay, 12 parts of calcium carbonate and 2 parts of electrolytic manganese.
The obtained finished flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base material 2.25Cr-1 Mo-0.25V), slag is easy to remove, and the surface of a welding seam has an indentation. The defects of air holes, slag inclusion and the like are not found through ultrasonic inspection. The deposited metal comprises the following chemical components: c:0.089%, mn:1.30%, si:0.23%, S:0.007%, P:0.005%, cr:2.43%, mo:0.98%, nb:0.012%, V:0.32%, ti:0.0003 % of Cu:0.032%, ni:0.13%, sb:0.0015%, sn:0.0016%, as:0.0010%, B:0.0002%, pb:0.0002%, bi:0.0002%, ce:0.002%, X coefficient 6.49ppm, J coefficient 100.98, and K coefficient 4.45ppm. The mechanical properties of the deposited metal are shown in a table 4, wherein the impact is dispersed at the low temperature of minus 30 ℃ in a heat treatment state and does not meet the technical requirements; the heat treatment state room temperature tensile elongation rate is obviously reduced, and the minimum heat treatment state (705 ℃ multiplied by 8 h) room temperature tensile elongation rate also can not meet the technical requirement.
TABLE 4 mechanical Properties of comparative example 1 deposited metal
The reheat crack sensitivity evaluation is carried out by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the area reduction rates RoA of the two samples are respectively 25% and 23%, and the samples do not pass a screening test, which indicates that the weld metal has higher reheat crack sensitivity.
Comparative example 2:
this comparative example is based on example 2 and differs from example 2 in that the submerged arc flux contains no rare earth fluoride and is replaced by an equal amount of fluorite, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
26 parts of fluorite, 26 parts of fused magnesite, 20 parts of alumina, 9 parts of wollastonite, 3 parts of clay, 12 parts of calcium carbonate, 2 parts of electrolytic manganese and 2 parts of composite silicon-barium-calcium deoxidizer.
The obtained flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base material 2.25Cr-1 Mo-0.25V), the slag is easy to remove, and the surface of a welding line has slight indentation. The ultrasonic inspection does not find the defects of air holes, slag inclusion and the like. The deposited metal comprises the following chemical components: c:0.087%, mn:1.28%, si:0.30%, S:0.007%, P:0.005%, cr:2.35%, mo:0.98%, nb:0.015%, V:0.31%, ti:0.0003 Percent, cu:0.038%, ni:0.12%, sb:0.0009%, sn:0.0008%, as:0.0009%, B:0.0002%, pb:0.00018%, bi:0.0001%, ce:0.006%, X factor of 5.89ppm, J factor of 91.64 and K factor of 3.07ppm. The deposited metal has the mechanical properties shown in the table 5, wherein the impact is dispersed at the low temperature of minus 30 ℃ in the heat treatment state and does not meet the technical requirements.
TABLE 5 mechanical Properties of deposited Metal of comparative example 2
The reheat crack sensitivity evaluation is carried out by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the area reduction RoA of the two samples is respectively 26% and 29%, and the samples fail to pass the screening test, which indicates that the weld metal has higher reheat crack sensitivity.
Comparative example 3:
this comparative example is based on example 2 and differs from example 2 in that the combined barium calcium silico-deoxidizer is not included in the submerged arc flux, and in that an equivalent amount of fluorite is used instead, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
25 parts of fluorite, 26 parts of fused magnesia, 20 parts of alumina, 9 parts of wollastonite, 3 parts of clay, 12 parts of calcium carbonate, 2 parts of electrolytic manganese and 3 parts of rare earth fluoride.
The obtained finished flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base material 2.25Cr-1 Mo-0.25V), slag is easy to remove, and the surface of a welding seam has an indentation. The defects of air holes, slag inclusion and the like are not found through ultrasonic inspection. The deposited metal comprises the following chemical components: c:0.082%, mn:1.15%, si:0.15%, S:0.009%, P:0.007%, cr:2.30%, mo:1.02%, nb:0.013%, V:0.31%, ti:0.0003 Percent, cu:0.033%, ni:0.14%, sb:0.0010%, sn:0.0005%, as:0.0010%, B:0.0002%, pb:0.00020%, bi:0.0003%, ce:0.009%, X coefficient 7.89ppm, J coefficient 101.4, K coefficient 5.3ppm. The mechanical properties of the deposited metal are shown in a table 6, wherein the impact is dispersed at the low temperature of minus 30 ℃ in a heat treatment state and does not meet the technical requirements; the tensile elongation at room temperature in the heat treatment state is obviously reduced, and the tensile elongation at room temperature in the minimum heat treatment state (705 ℃ multiplied by 8 h) also does not meet the technical requirement.
TABLE 6 mechanical properties of comparative example 3 deposited metal
And (3) evaluating the reheat crack sensitivity by adopting a 650-DEG C constant-speed high-temperature tensile test method, wherein the area reduction rates RoA of the two samples are 23% and 27%, and the weld metal has higher reheat crack sensitivity if failing the screening test.
Comparative example 4:
this comparative example is based on example 2 and differs from example 2 in that the content of fluorite in the submerged arc flux is different, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following components in parts by weight:
12 parts of fluorite, 37 parts of fused magnesite, 18 parts of alumina, 13 parts of wollastonite, 7 parts of clay, 7 parts of calcium carbonate, 1 part of electrolytic manganese, 5 parts of rare earth fluoride and 3 parts of composite silicon barium calcium deoxidizer.
The obtained finished flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding, and the defect of pores visible to naked eyes on the surface of a welding seam is overcome.
That is, if the content of fluorite is too small, it may cause a defect of pores visible to the naked eye on the surface of the weld.
Comparative example 5:
this comparative example is based on example 1, differing from example 1 in that the baking temperature of the submerged arc flux is different, specifically:
the preparation method of the submerged arc welding flux for the vanadium-chromium-molybdenum steel comprises the following steps:
s3, baking for 1 hour at 700 ℃, and sieving by a 20-60-mesh sieve to obtain the finished flux.
The obtained finished flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding, and the surface of a welding seam has dense air hole defects.
That is, under the formulation of the examples, if the baking temperature is too high, it may cause dense porosity defects on the weld surface.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The submerged arc welding flux for the vanadium-chromium-molybdenum steel is characterized by comprising the following components in parts by weight:
23-35 parts of fluorite, 18-34 parts of fused magnesia, 15-24 parts of alumina, 5-15 parts of wollastonite, 2-8 parts of clay, 3-12 parts of calcium carbonate, 0.5-2 parts of electrolytic manganese, 0.5-3 parts of rare earth fluoride and 0.3-2 parts of composite silicon barium calcium deoxidizer.
2. The submerged arc welding flux for the vanadium-chromium-molybdenum steel as claimed in claim 1, which comprises the following components in parts by weight:
35 parts of fluorite, 33 parts of fused magnesia, 16 parts of alumina, 5 parts of wollastonite, 5 parts of clay, 4 parts of calcium carbonate, 0.5 part of electrolytic manganese, 1 part of rare earth fluoride and 0.5 part of composite silicon barium calcium deoxidizer.
3. The submerged arc welding flux for the vanadium-chromium-molybdenum steel as claimed in claim 1, which comprises the following components in parts by weight:
23 parts of fluorite, 26 parts of fused magnesite, 20 parts of alumina, 9 parts of wollastonite, 3 parts of clay, 12 parts of calcium carbonate, 2 parts of electrolytic manganese, 3 parts of rare earth fluoride and 2 parts of composite silicon barium calcium deoxidizer.
4. The submerged arc welding flux for the vanadium-chromium-molybdenum steel as claimed in claim 1, which comprises the following components in parts by weight:
28 parts of fluorite, 18 parts of fused magnesia, 23 parts of alumina, 13 parts of wollastonite, 7 parts of clay, 7 parts of calcium carbonate, 1 part of electrolytic manganese, 2 parts of rare earth fluoride and 1 part of composite silicon barium calcium deoxidizer.
5. The process for preparing the submerged arc flux for vanadium-chromium-molybdenum steel according to any one of claims 1 to 4, characterized by comprising the following steps:
s1, adding the components of the submerged arc welding flux for vanadium-chromium-molybdenum steel into a material cylinder according to parts by weight, and performing dry mixing to obtain powder;
s2, adding a binder into the powder, stirring and granulating;
s3, baking at 520-600 ℃, preserving heat for 1 hour, and sieving by a 20-60-mesh sieve to obtain the finished flux.
6. The method according to claim 5, wherein in step S2, the binder is sodium potassium silicate and is added in an amount of 22-30% by weight of the powder.
7. The process according to claim 6, wherein the potash-soda water glass has a modulus of 3.1 and a concentration of 40-43 ° Be.
8. A wire agent combination, which is characterized by comprising the submerged arc welding agent for the vanadium chromium molybdenum steel according to any one of claims 1 to 4, and further comprising a submerged arc welding wire used together with the submerged arc welding agent.
9. The filamentization composition of claim 8, wherein the submerged arc welding wire is CHW-SB3V.
10. Use of a submerged arc welding flux for vanadium chromium molybdenum steel according to any one of claims 1 to 4 or a combination of filamentants according to claim 8 or 9 for welding vanadium chromium molybdenum steel for high temperature high pressure hydrogen equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211091785.9A CN115319331B (en) | 2022-09-07 | 2022-09-07 | Submerged arc welding flux for vanadium-chromium-molybdenum-added steel, preparation method, wire agent combination and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211091785.9A CN115319331B (en) | 2022-09-07 | 2022-09-07 | Submerged arc welding flux for vanadium-chromium-molybdenum-added steel, preparation method, wire agent combination and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115319331A true CN115319331A (en) | 2022-11-11 |
| CN115319331B CN115319331B (en) | 2024-03-26 |
Family
ID=83929651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211091785.9A Active CN115319331B (en) | 2022-09-07 | 2022-09-07 | Submerged arc welding flux for vanadium-chromium-molybdenum-added steel, preparation method, wire agent combination and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115319331B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3692590A (en) * | 1969-09-03 | 1972-09-19 | Kobe Steel Ltd | Flux for submerged arc welding |
| CN102085603A (en) * | 2009-12-02 | 2011-06-08 | 中冶焊接科技有限公司 | Fluorine-base type sintered flux used for reducing sulfur and phosphorus contents of welding joint and used in submerged arc hardfacing |
| JP2012232334A (en) * | 2011-05-06 | 2012-11-29 | Kobe Steel Ltd | Material and method for submerged arc welding |
| CN103056558A (en) * | 2013-01-22 | 2013-04-24 | 四川大西洋焊接材料股份有限公司 | Submerged-arc flux for low-temperature impact of Cr-Mo heat-resistant steel and narrow-gap submerged-arc welding and preparation method thereof |
| CN103846577A (en) * | 2014-03-26 | 2014-06-11 | 锦州天鹅焊材股份有限公司 | Soldering flux for submerged arc soldering of X100 pipeline steel and preparation method thereof |
| KR101579927B1 (en) * | 2014-10-28 | 2015-12-29 | 현대종합금속 주식회사 | Agglomerated flux for multi-electrode high-basic submerged arc welding |
| CN105710558A (en) * | 2014-12-05 | 2016-06-29 | 海宁瑞奥金属科技有限公司 | Flux-cored wire and welding flux used for submerged-arc welding of low-temperature steel |
| CN106238965A (en) * | 2016-08-30 | 2016-12-21 | 洛阳双瑞特种合金材料有限公司 | A kind of 9Ni steel welding sintered flux and preparation method thereof |
| CN107322189A (en) * | 2017-07-14 | 2017-11-07 | 招商局重工（江苏）有限公司 | A kind of sintered flux for high heat-input submerged-arc welding |
| CN111112880A (en) * | 2019-12-31 | 2020-05-08 | 哈尔滨威尔焊接有限责任公司 | Welding flux for heat-resistant steel narrow-gap submerged arc welding, preparation and welding method |
| CN111360451A (en) * | 2020-04-01 | 2020-07-03 | 中国石油天然气集团有限公司 | Sintered flux suitable for welding X80 low-temperature thick-wall submerged arc steel pipe |
| CN111660038A (en) * | 2020-05-07 | 2020-09-15 | 中国船舶重工集团公司第七二五研究所 | Sintered flux for welding high-manganese low-temperature steel and preparation method thereof |
| CN112975211A (en) * | 2021-02-09 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Low-yield-ratio high-toughness submerged-arc welding material for Q690-grade weather-resistant bridge |
| CN113414519A (en) * | 2021-08-06 | 2021-09-21 | 四川大西洋焊接材料股份有限公司 | ENi6620 nickel-based welding rod for alternating current and preparation method and welding method thereof |
-
2022
- 2022-09-07 CN CN202211091785.9A patent/CN115319331B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3692590A (en) * | 1969-09-03 | 1972-09-19 | Kobe Steel Ltd | Flux for submerged arc welding |
| CN102085603A (en) * | 2009-12-02 | 2011-06-08 | 中冶焊接科技有限公司 | Fluorine-base type sintered flux used for reducing sulfur and phosphorus contents of welding joint and used in submerged arc hardfacing |
| JP2012232334A (en) * | 2011-05-06 | 2012-11-29 | Kobe Steel Ltd | Material and method for submerged arc welding |
| CN103056558A (en) * | 2013-01-22 | 2013-04-24 | 四川大西洋焊接材料股份有限公司 | Submerged-arc flux for low-temperature impact of Cr-Mo heat-resistant steel and narrow-gap submerged-arc welding and preparation method thereof |
| CN103846577A (en) * | 2014-03-26 | 2014-06-11 | 锦州天鹅焊材股份有限公司 | Soldering flux for submerged arc soldering of X100 pipeline steel and preparation method thereof |
| KR101579927B1 (en) * | 2014-10-28 | 2015-12-29 | 현대종합금속 주식회사 | Agglomerated flux for multi-electrode high-basic submerged arc welding |
| CN105710558A (en) * | 2014-12-05 | 2016-06-29 | 海宁瑞奥金属科技有限公司 | Flux-cored wire and welding flux used for submerged-arc welding of low-temperature steel |
| CN106238965A (en) * | 2016-08-30 | 2016-12-21 | 洛阳双瑞特种合金材料有限公司 | A kind of 9Ni steel welding sintered flux and preparation method thereof |
| CN107322189A (en) * | 2017-07-14 | 2017-11-07 | 招商局重工（江苏）有限公司 | A kind of sintered flux for high heat-input submerged-arc welding |
| CN111112880A (en) * | 2019-12-31 | 2020-05-08 | 哈尔滨威尔焊接有限责任公司 | Welding flux for heat-resistant steel narrow-gap submerged arc welding, preparation and welding method |
| CN111360451A (en) * | 2020-04-01 | 2020-07-03 | 中国石油天然气集团有限公司 | Sintered flux suitable for welding X80 low-temperature thick-wall submerged arc steel pipe |
| CN111660038A (en) * | 2020-05-07 | 2020-09-15 | 中国船舶重工集团公司第七二五研究所 | Sintered flux for welding high-manganese low-temperature steel and preparation method thereof |
| CN112975211A (en) * | 2021-02-09 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Low-yield-ratio high-toughness submerged-arc welding material for Q690-grade weather-resistant bridge |
| CN113414519A (en) * | 2021-08-06 | 2021-09-21 | 四川大西洋焊接材料股份有限公司 | ENi6620 nickel-based welding rod for alternating current and preparation method and welding method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 杨飞;李亚军;蒋勇;朱平;赵建仓;: "核电设备用埋弧焊焊剂CHF703HR1的研制", 热加工工艺, no. 23, 31 December 2016 (2016-12-31), pages 239 - 242 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115319331B (en) | 2024-03-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109988972B (en) | Round steel for low-carbon sulfur-containing air conditioning pipe and production process thereof | |
| CN110000489A (en) | A kind of low-alloy steel electrode and preparation method thereof of ultralow-hydrogen low alkalinity | |
| JP2014189826A (en) | Fe-Ni-Cr-BASED ALLOY EXCELLENT IN SURFACE PROPERTY AND METHOD OF PRODUCING THE SAME | |
| CN112620598A (en) | Continuous casting crystallizer casting powder special for sorbite stainless steel and application thereof | |
| AU2006225236B2 (en) | Sintered flux for submerged arc welding | |
| KR100825160B1 (en) | High-cleanliness steel having high fatigue strength and high cold workability, and preparation method thereof | |
| JP4423050B2 (en) | High cleanliness steel with excellent fatigue strength and cold workability | |
| CN107949455B (en) | Welding wire for submerged arc welding | |
| JP4672177B2 (en) | Submerged arc welding method for duplex stainless steel | |
| CN109093286A (en) | A kind of 2.25Cr-1Mo steel exchange submerged arc welding welding wire and solder flux | |
| CN113458656A (en) | 2.25% Cr-1% Mo-V steel electrode for hydrogenation reactor and preparation method thereof | |
| JP6903182B1 (en) | Ni-Cr-Al-Fe alloy with excellent surface properties and its manufacturing method | |
| JP2006104506A (en) | Method for producing high cleanness steel excellent in fatigue strength or cold workability | |
| CN115319331B (en) | Submerged arc welding flux for vanadium-chromium-molybdenum-added steel, preparation method, wire agent combination and application | |
| CN115667563B (en) | Precipitation hardening martensitic stainless steel sheet excellent in fatigue resistance | |
| JP2006016639A (en) | High cleanliness steel superior in fatigue strength or cold workability | |
| CN116529396A (en) | High Ni alloy excellent in weld high temperature cracking resistance | |
| WO2022210651A1 (en) | Duplex stainless steel wire rod, and duplex stainless steel wire | |
| WO2023062855A1 (en) | Nickel alloy having excellent surface properties and manufacturing method thereof | |
| JP2000102892A (en) | Firing type flux for submerge arc welding and its manufacture | |
| CN112059473A (en) | Ultralow-hydrogen type high-alkalinity high-toughness sintered flux | |
| JP2010234429A (en) | Coated electrode for duplex stainless steel welding for pulverizing solidified crystalline particle | |
| JPH0639587A (en) | Submerged arc welding method for high-cr ferritic heat resisting steel | |
| JP6662174B2 (en) | Steel plate | |
| CN110653520A (en) | Flux used in cooperation with strip surfacing nickel-based alloy welding strip with excellent crack resistance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |