CN115319331B - Submerged arc welding flux for vanadium-chromium-molybdenum-added steel, preparation method, wire agent combination and application - Google Patents
Submerged arc welding flux for vanadium-chromium-molybdenum-added steel, preparation method, wire agent combination and application Download PDFInfo
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- 238000003466 welding Methods 0.000 title claims abstract description 99
- 230000004907 flux Effects 0.000 title claims abstract description 68
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 44
- 239000010959 steel Substances 0.000 title claims abstract description 44
- 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 36
- VGIPUQAQWWHEMC-UHFFFAOYSA-N [V].[Mo].[Cr] Chemical compound [V].[Mo].[Cr] VGIPUQAQWWHEMC-UHFFFAOYSA-N 0.000 claims abstract description 32
- 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
- NCJRLCWABWKAGX-UHFFFAOYSA-N [Si].[Ca].[Ba] Chemical compound [Si].[Ca].[Ba] NCJRLCWABWKAGX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 18
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 18
- 239000004927 clay Substances 0.000 claims abstract description 17
- 238000000034 method Methods 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
- 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
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 5
- BITYAPCSNKJESK-UHFFFAOYSA-N potassiosodium Chemical group [Na].[K] BITYAPCSNKJESK-UHFFFAOYSA-N 0.000 claims description 5
- 235000019353 potassium silicate Nutrition 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 239000004111 Potassium silicate Substances 0.000 claims description 3
- 238000007580 dry-mixing Methods 0.000 claims description 3
- 229910052913 potassium silicate Inorganic materials 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 claims 3
- 229910052751 metal Inorganic materials 0.000 abstract description 42
- 239000002184 metal Substances 0.000 abstract description 42
- 238000010438 heat treatment Methods 0.000 abstract description 20
- 230000035945 sensitivity Effects 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000002893 slag Substances 0.000 description 29
- 238000012360 testing method Methods 0.000 description 17
- 230000000052 comparative effect Effects 0.000 description 13
- 230000007547 defect Effects 0.000 description 10
- 229910052698 phosphorus Inorganic materials 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 7
- 239000011572 manganese Substances 0.000 description 7
- 238000012216 screening Methods 0.000 description 7
- 229910052720 vanadium Inorganic materials 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 239000010953 base metal Substances 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 238000005984 hydrogenation reaction Methods 0.000 description 6
- 238000007689 inspection Methods 0.000 description 6
- 238000005496 tempering Methods 0.000 description 6
- 238000009864 tensile test Methods 0.000 description 6
- 229910052745 lead Inorganic materials 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 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
- 239000000203 mixture Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229910004762 CaSiO Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910001579 aluminosilicate mineral Inorganic materials 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000006731 degradation reaction Methods 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
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects 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
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 235000014380 magnesium carbonate Nutrition 0.000 description 1
- 150000002739 metals Chemical class 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
- 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
- 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
- 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 silk agent combination and application, wherein the submerged arc welding flux for the 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 flux AC welding vanadium-chromium-molybdenum steel has the advantages of excellent welding process performance, high weld metal purity, good mechanical property in a heat treatment state, stable low-temperature impact toughness, lower reheat crack sensitivity and capability of meeting the technical requirements of manufacturing high-temperature high-pressure hydrogen-contacting equipment.
Description
Technical Field
The invention relates to the technical field of silk agent combination, in particular to submerged arc welding flux for vanadium-chromium-molybdenum steel, a preparation method thereof, silk 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 of the oil refining industry, and particularly has extremely bad use conditions, wherein the large hydrogenation reactor is at high temperature (400-482 ℃), high pressure (10-25 MPa) and a hydrogenation environment. Along with the increasing degradation of crude oil quality, the development trend of large-scale and high-parameter refining equipment, and the vanadium-chromium-molybdenum steel (2.25 Cr-1 Mo-0.25V) with higher strength and use temperature and better hydrogen damage resistance performance gradually becomes the first choice steel grade for manufacturing high-temperature high-pressure hydrogen equipment.
The 2.25Cr-1Mo-0.25V steel main welding seam is mainly made by adopting alternating current submerged arc welding, has higher cold crack tendency, has extremely sensitive low-temperature impact toughness to the change of welding wire flux components, and has the container wall thickness of 100-300mm, thereby providing higher requirements on the low-temperature impact toughness stability of welding seam metals in different heat treatment states. Meanwhile, the latest design standard has prolonged the maximum heat treatment state heat preservation time from 32h to 34h, and more severe requirements on the weld metal strength and high-temperature durability are also put forward. In addition, due to the addition of strong carbide forming elements such as V and the like, the reheat crack sensitivity of the welded joint is increased, reheat cracks are found at submerged-arc welding seam metal parts of a plurality of thick-wall 2.25Cr-1Mo-0.25V steel reactors in Europe, and reheat cracks are also found at intervals when equipment is inspected in site in China.
Disclosure of Invention
The invention aims to provide the submerged arc welding flux for the vanadium-chromium-molybdenum added steel, and the submerged arc welding flux is used for welding the vanadium-chromium-molybdenum added steel, so that the mechanical property of weld metal can meet the requirements of high-temperature high-pressure hydrogen equipment, and simultaneously, the submerged arc welding flux 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, 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 added 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 individual components of the submerged arc welding flux according to the invention are commercially available.
The submerged arc welding flux with the proportion is used for welding vanadium-chromium-molybdenum steel, and the mechanical property of weld metal can meet the requirements of high-temperature high-pressure hydrogen equipment, and 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: important slag forming agents, the melting point, viscosity and surface tension of slag can be adjusted, and the fluidity of slag is improved; and meltingSiO in slag 2 Reacting to generate SiF 4 The gas effectively reduces the tendency of hydrogen holes; meanwhile, the alkalinity of slag can be improved, and the desulfurization effect is achieved.
Electric smelting magnesite: the good slag-forming material contains extremely low content of P, pb, bi, sb, sn, as, S and other harmful elements after remelting and coarse-removing and storing 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, in an alkaline slag system, the solidification temperature of slag can be obviously improved, and the viscosity of slag can be increased. When the addition amount of the fused magnesia is too high, the wettability of the welding seam is poor, and slag ash adheres to the surface of the welding seam.
Alumina: the amphoteric oxide, an important slag former, properly increases the content of alumina, ensures that the scale corrugation of the weld joint is finer, and can improve the slag removal performance. When the content of alumina is too high, the melting point of slag is increased, and the convexity of the welding seam is increased.
Wollastonite: metasilicate mineral belonging to calcium and having chemical formula CaSiO 3 . Because of higher CaO content, the slag alkalinity can be improved, the welding process performance can be improved, and the weld metal toughness can be improved. In sintered fluxes, the strength of the flux particles can also be increased, reducing the degree of particle comminution.
Clay: the aluminosilicate mineral is mainly used for adjusting the physical properties of slag and improving the welding process performance.
Calcium carbonate: the main functions are slag making and gas making, improving slag alkalinity and desulfurizing. In the invention, a large amount of CO is decomposed in the welding process by adding more calcium carbonate 2 The gas can react with hydrogen protons existing in a molten pool during alternating-current submerged arc welding, so that the sensitivity of the alternating-current submerged arc welding air holes is reduced.
Electrolytic manganese: the deoxidizer is commonly used, so that oxide inclusions in the welding seam can be reduced. Mn promotes acicular ferrite to form in the microstructure, thereby improving the low-temperature impact toughness stability; however, too high a Mn content promotes the increase of segregation, which is disadvantageous for temper brittleness.
Rare earth fluoride: the addition of proper amount of rare earth fluoride can obviously improve the directionality of columnar crystals, refine grains and improve the cold crack resistance of the welded joint. Meanwhile, the grain boundary of a molten pool can be purified, and the content of harmful elements, such as Pb, bi, sb, sn, as, which are highly related to reheat crack sensitivity, is reduced.
Composite silicon-barium-calcium deoxidizer: has important functions of changing the shape distribution of weld inclusion, refining grains, improving the mechanical property of weld metal and improving the weld quality. Particularly, the stable calcium treatment can prevent a large amount of fine MnS particles in the steel from precipitating along the austenite grain boundaries in the welding thermal cycle process, reduce the free S content in the steel, prevent Pb, bi, sb, sn, as, S and other harmful elements from being biased towards the prior austenite grain boundaries, and obviously reduce reheat crack sensitivity.
According to the invention, the content of harmful elements such as Pb, bi, sb, sn, as, S and the enrichment degree of grain boundaries can be controlled and reduced by adding the rare earth fluoride and the composite silicon barium calcium deoxidizer, 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, sb in the weld joint are low, no reheat crack is generally generated when k=pb+bi+0.03sb is less than or equal to 1.5 ppm.
X=（10P+5Sb+4Sn+As）×10 -2 Wherein the elements are substituted in ppm content;
J=（Si+Mn）×（P+Sn）×10 4 wherein the elements are substituted in the mass percent.
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 magnesia, 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 added steel comprises the following steps:
s1, adding all components of submerged arc welding flux for vanadium-chromium-molybdenum steel into a material cylinder according to parts by weight, and carrying out dry mixing uniformly to obtain powder;
s2, adding a binder into the powder, stirring and granulating;
s3, baking at 520-600 ℃ for 1 hour, and sieving with a 20-60-mesh sieve to obtain the finished flux.
Further, in the step S2, the binder is sodium potassium silicate, and the addition amount is 22-30% of the weight of the powder.
Further, the modulus of the potassium sodium water glass is 3.1, and the concentration is 40-43 DEG Be.
A wire agent combination comprises the submerged arc welding flux for vanadium-chromium-molybdenum added steel and also comprises a submerged arc welding wire matched with the submerged arc welding flux.
Further, the submerged arc welding wire is CHW-SB3V.
Welding wire CHW-SB3V (diameter: 4.0 mm) meets the requirements of the metallurgical grade of the hot-strength steel solid welding wire H10Cr3MoV for submerged arc welding, and the control range of chemical components is C:0.05-0.13%, 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, 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 the 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 hydrogen equipment.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the submerged arc welding flux is matched with special submerged arc welding wire CHW-SB3V to weld vanadium-chromium-molybdenum steel, the weld metal purity is high, the mechanical property is excellent, the submerged arc welding flux has better low-temperature impact toughness and tensile strength at-30 ℃ in the maximum heat treatment state (705 ℃ multiplied by 34 h) and the minimum heat treatment state (705 ℃ multiplied by 8 h), the tempering embrittlement tendency is low (VTr54+3.0DeltaVTr54 is less than or equal to 0 ℃), and the high-temperature endurance test of the maximum heat treatment state weld metal at 540 ℃ is continuously performed for more than 1000h.
2. The weld metal passes the reheat crack screening test and has lower reheat crack sensitivity.
3. The submerged arc welding flux disclosed by the invention has the advantages of excellent alternating current welding process performance, strong air hole resistance, easiness in deslagging of a narrow-gap deep groove and attractive weld joint forming.
Detailed Description
The present invention will be described in further detail with reference to the following examples, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent, and the description thereof is merely illustrative of the present invention and not intended to be limiting.
Example 1:
the submerged arc welding flux for the vanadium-chromium-molybdenum added 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 added steel comprises the following steps:
s1, adding all components of submerged arc welding flux for vanadium-chromium-molybdenum steel into a material cylinder according to parts by weight, dry-mixing for 8-15 minutes, and uniformly mixing to obtain powder;
s2, adding a binder (potassium sodium water glass, modulus 3.1, concentration 40-43 Be) according to the proportion of 22-30% of the powder weight, stirring and granulating;
s3, baking for 1 hour at 600 ℃, and sieving through a 20-60 mesh screen to obtain the finished flux.
The obtained finished product flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base metal 2.25Cr-1 Mo-0.25V), slag removal is easy, 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 % 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 ppm X coefficient 6.77ppm, J coefficient 66.3, 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 weld metal in the maximum heat treatment state is not broken in the high-temperature endurance test at 540 ℃ for 1000 hours, and the tempering embrittlement tendency is low (VTr54+3.0DeltaVTr54= -33 ℃).
TABLE 1 example 1 deposited metal mechanical Properties
The reheat crack sensitivity is evaluated by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the reduction of area RoA of both samples was 36% and 30%, respectively, and passed the screening test (average value of not less than 32% was required, and individual value of not less than 29%).
Example 2:
this example is based on example 1, and differs from example 1 in that the formulation of the submerged arc flux, the baking temperature, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum added steel comprises the following components in parts by weight:
23 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, 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 added steel comprises the following steps:
s3, baking for 1 hour at 520 ℃, and sieving through a 20-60 mesh screen to obtain the finished flux.
The obtained finished product flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base metal 2.25Cr-1 Mo-0.25V), slag removal is easy, the welding seam is attractive in appearance, and slight smoke is generated. 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 % 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 weld metal in the maximum heat treatment state is not broken in the high-temperature endurance test at 540 ℃ for 1000 hours, and the tempering embrittlement tendency is low (VTr54+3.0DeltaVTr54= -41 ℃).
TABLE 2 mechanical Properties of deposited metal
The reheat crack sensitivity is evaluated by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the reduction of area RoA of both samples was 35% and 33%, respectively, and passed the screening test.
Example 3:
this example is based on example 1, and differs from example 1 in that the formulation of the submerged arc flux, the baking temperature, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum added 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 added steel comprises the following steps:
s3, baking at 560 ℃ for 1 hour, and sieving through a 20-60 mesh screen to obtain the finished flux.
The obtained finished product flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base metal 2.25Cr-1 Mo-0.25V), slag removal is easy, the welding line is attractive in appearance, and defects such as air holes, slag inclusion and the like are not 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 % 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, K coefficient 1.47ppm. The mechanical properties of the deposited metal in the maximum heat treatment state (705 ℃ C. Multiplied by 34 h) and the minimum heat treatment state (705 ℃ C. Multiplied by 8 h) are shown in Table 3, and all meet the technical requirements. The weld metal in the maximum heat treatment state is not broken in the high-temperature endurance test at 540 ℃ for 1000 hours, and the tempering embrittlement tendency is low (VTr54+3.0DeltaVTr54= -36 ℃).
TABLE 3 mechanical Properties of deposited metal
The reheat crack sensitivity is evaluated by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the reduction of area RoA of both samples was 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 does not contain rare earth fluoride and composite silicon barium calcium deoxidizer, and is replaced with an equal amount of fluorite, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum added 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 product flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base metal 2.25Cr-1 Mo-0.25V), slag removal is easy, and the surface of a welding line 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 % 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, K coefficient 4.45ppm. The mechanical properties of deposited metal are shown in Table 4, wherein the low-temperature impact of the heat treatment state at minus 30 ℃ is discrete, and the technical requirements are not met; the room temperature stretching elongation in the heat treatment state is obviously reduced, and the minimum room temperature stretching elongation in the heat treatment state (705 ℃ multiplied by 8 h) also does not meet the technical requirements.
TABLE 4 mechanical Properties of deposited metal of comparative example 1
The reheat crack sensitivity is evaluated by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the reduction of area RoA of the two samples was 25% and 23%, respectively, and failed screening tests indicated that the weld metal had a 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 does not contain rare earth fluoride, and is replaced with an equivalent amount of fluorite, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum added steel comprises the following components in parts by weight:
26 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 2 parts of composite silicon-barium-calcium deoxidizer.
The obtained finished product flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base metal 2.25Cr-1 Mo-0.25V), slag removal is easy, 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:0.087%, 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 % 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%, X5.89 ppm, J91.64, K3.07 ppm. The mechanical properties of the deposited metal are shown in Table 5, wherein the low-temperature impact at the temperature of minus 30 ℃ is discrete, and the technical requirements are not met.
TABLE 5 mechanical Properties of deposited metal of comparative example 2
The reheat crack sensitivity is evaluated by adopting a 650 ℃ constant-speed high-temperature tensile test method, and the result is as follows: the reduction of area RoA of the two samples was 26% and 29%, respectively, and failed screening tests indicated that the weld metal had a higher reheat crack sensitivity.
Comparative example 3:
this comparative example is based on example 2, and differs from example 2 in that the submerged arc flux does not contain a composite silicon barium calcium deoxidizer, and is replaced with an equivalent amount of fluorite, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum added 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 product flux is matched with a special welding wire CHW-SB3V alternating current submerged arc welding to prepare a deposited metal test plate (base metal 2.25Cr-1 Mo-0.25V), slag removal is easy, and the surface of a welding line 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 % 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 deposited metal are shown in Table 6, wherein the low-temperature impact at the temperature of minus 30 ℃ is discrete, and the technical requirements are not met; the room temperature stretching elongation in the heat treatment state is obviously reduced, and the minimum room temperature stretching elongation in the heat treatment state (705 ℃ multiplied by 8 h) also does not meet the technical requirements.
TABLE 6 mechanical Properties of deposited metal of comparative example 3
The reheat crack sensitivity is evaluated by adopting a 650 ℃ constant-speed high-temperature tensile test method, the area shrinkage rate RoA of two samples is 23% and 27% respectively, and no screening test is passed, so that the weld metal has higher reheat crack sensitivity.
Comparative example 4:
this comparative example is based on example 2, and differs from example 2 in that the fluorite content in the submerged arc flux is different, specifically:
the submerged arc welding flux for the vanadium-chromium-molybdenum added steel comprises the following components in parts by weight:
12 parts of fluorite, 37 parts of fused magnesia, 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.
And (3) matching the obtained finished product flux with a special welding wire CHW-SB3V alternating current submerged arc welding, wherein the surface of the welding seam has macroscopic pore defects.
That is, if the fluorite content is too small, it may cause defects of macroscopic pores on the surface of the weld.
Comparative example 5:
this comparative example is based on example 1, and differs 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 added steel comprises the following steps:
s3, baking for 1 hour at 700 ℃, and sieving through a 20-60 mesh screen to obtain the finished flux.
And (3) matching the obtained finished product flux with a special welding wire CHW-SB3V alternating current submerged arc welding, wherein dense air hole defects appear on the surface of a welding line.
That is, under the formulation of the examples, if the baking temperature is too high, dense pore defects may occur on the weld surface.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The submerged arc welding flux for the vanadium-chromium-molybdenum added 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 vanadium-added chromium-molybdenum steel according to claim 1, which is characterized by comprising 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 vanadium-added chromium-molybdenum steel according to claim 1, which is characterized by comprising the following components in parts by weight:
23 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, 3 parts of rare earth fluoride and 2 parts of composite silicon-barium-calcium deoxidizer.
4. The submerged arc welding flux for vanadium-added chromium-molybdenum steel according to claim 1, which is characterized by comprising 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. A method of preparing a submerged arc flux for vanadium-chromium-molybdenum added steel as defined in any one of claims 1 to 4 including the steps of:
s1, adding all components of submerged arc welding flux for vanadium-chromium-molybdenum steel into a material cylinder according to parts by weight, and carrying out dry mixing uniformly to obtain powder;
s2, adding a binder into the powder, stirring and granulating;
s3, baking at 520-600 ℃ for 1 hour, and sieving with a 20-60-mesh sieve to obtain the finished flux.
6. The method according to claim 5, wherein in the step S2, the binder is sodium potassium silicate, and the addition amount is 22-30% of the weight of the powder.
7. The method according to claim 6, wherein the sodium potassium silicate has a modulus of 3.1 and a concentration of 40-43 DEG Be.
8. A wire agent combination comprising the submerged arc welding flux for vanadium-chromium-molybdenum-added steel as defined in any one of claims 1 to 4, and further comprising a submerged arc welding wire for use in combination with the submerged arc welding flux.
9. The combination of filament agents of claim 8, wherein the submerged arc welding wire is CHW-SB3V.
10. Use of submerged arc welding flux for vanadium-chromium-molybdenum steel according to any one of claims 1 to 4 or of the wire agent combination according to claim 8 or 9 for welding vanadium-chromium-molybdenum steel for high-temperature high-pressure hydrogen-contacting devices.
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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 |
|---|
| 核电设备用埋弧焊焊剂CHF703HR1的研制;杨飞;李亚军;蒋勇;朱平;赵建仓;;热加工工艺;20161231(第23期);239-242 * |
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