CN109434321B - Submerged arc welding flux-cored wire and preparation method thereof - Google Patents
Submerged arc welding flux-cored wire and preparation method thereof Download PDFInfo
- Publication number
- CN109434321B CN109434321B CN201811433775.2A CN201811433775A CN109434321B CN 109434321 B CN109434321 B CN 109434321B CN 201811433775 A CN201811433775 A CN 201811433775A CN 109434321 B CN109434321 B CN 109434321B
- Authority
- CN
- China
- Prior art keywords
- percent
- powder
- equal
- less
- welding
- 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.)
- Active
Links
- 238000003466 welding Methods 0.000 title claims abstract description 125
- 238000002360 preparation method Methods 0.000 title description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 87
- 239000010959 steel Substances 0.000 claims abstract description 87
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 37
- 230000004907 flux Effects 0.000 claims abstract description 33
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 31
- 239000010439 graphite Substances 0.000 claims abstract description 31
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 26
- 230000008569 process Effects 0.000 claims abstract description 21
- 229910052618 mica group Inorganic materials 0.000 claims abstract description 18
- 239000010445 mica Substances 0.000 claims abstract description 17
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 16
- 229910001200 Ferrotitanium Inorganic materials 0.000 claims abstract description 15
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 15
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 15
- 239000004579 marble Substances 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 14
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 14
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 14
- 229910001309 Ferromolybdenum Inorganic materials 0.000 claims abstract description 13
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims abstract description 13
- 239000010436 fluorite Substances 0.000 claims abstract description 13
- 229910000604 Ferrochrome Inorganic materials 0.000 claims abstract description 12
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 12
- 229910000628 Ferrovanadium Inorganic materials 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 12
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims description 112
- 238000004140 cleaning Methods 0.000 claims description 24
- 238000007599 discharging Methods 0.000 claims description 16
- 238000005245 sintering Methods 0.000 claims description 16
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 8
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 8
- 239000012459 cleaning agent Substances 0.000 claims description 8
- 238000005238 degreasing Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 238000011049 filling Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 abstract description 31
- 239000002184 metal Substances 0.000 abstract description 31
- 239000002893 slag Substances 0.000 abstract description 22
- 238000005272 metallurgy Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 32
- 239000011651 chromium Substances 0.000 description 21
- 229910045601 alloy Inorganic materials 0.000 description 15
- 239000000956 alloy Substances 0.000 description 15
- 230000000694 effects Effects 0.000 description 13
- 229910001566 austenite Inorganic materials 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 11
- 238000005299 abrasion Methods 0.000 description 10
- 230000009286 beneficial effect Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 8
- 239000011159 matrix material Substances 0.000 description 8
- 229910052750 molybdenum Inorganic materials 0.000 description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 229910000734 martensite Inorganic materials 0.000 description 7
- 238000004321 preservation Methods 0.000 description 7
- 239000004576 sand Substances 0.000 description 7
- 239000006104 solid solution Substances 0.000 description 7
- 238000000227 grinding Methods 0.000 description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 6
- 239000011572 manganese Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000011733 molybdenum Substances 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 6
- 229910000599 Cr alloy Inorganic materials 0.000 description 5
- 230000009471 action Effects 0.000 description 5
- 229910001567 cementite Inorganic materials 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000000788 chromium alloy Substances 0.000 description 5
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 238000002844 melting Methods 0.000 description 5
- 150000001247 metal acetylides Chemical class 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 3
- 230000005496 eutectics Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052748 manganese Inorganic materials 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 241000723353 Chrysanthemum Species 0.000 description 2
- 235000007516 Chrysanthemum Nutrition 0.000 description 2
- 229910039444 MoC Inorganic materials 0.000 description 2
- 239000004113 Sepiolite Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- -1 bridges Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229910052903 pyrophyllite Inorganic materials 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 229910052624 sepiolite Inorganic materials 0.000 description 2
- 235000019355 sepiolite Nutrition 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 229910003178 Mo2C Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000001914 calming effect Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical compound [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910052627 muscovite Inorganic materials 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 229910052604 silicate mineral Inorganic materials 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
- B23K35/3602—Carbonates, basic oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
-
- 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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
Abstract
A submerged arc welding flux-cored wire comprises a steel strip and a flux core, wherein the steel strip comprises the following chemical components in percentage by weight: less than or equal to 0.02 percent of C, 0.2-1.2 percent of Mn0.3-1.8 percent of Si, 22-28 percent of Cr, 2-8 percent of W, 0.2-0.4 percent of Cu, 0.1-0.3 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-35% of marble, 15-28% of fluorite, 7-12% of mica, 6-14% of titanium dioxide, 2-8% of ferrovanadium, 2-6% of ferrosilicon, 2-12% of ferrotitanium, 13-17% of ferroboron, 2-8% of ferromolybdenum, 3-12% of graphite and the balance of ferrochromium; the welding wire can improve the hardness of the deposited metal, improve the toughness and the crack resistance of the deposited metal, improve the metallurgy and the process, improve the toughness and the crack resistance of the high-hardness deposited metal, and ensure good welding manufacturability, easy slag removal, no splashing, high hardness and excellent wear resistance.
Description
Technical Field
The invention relates to a welding material, in particular to a submerged arc welding flux-cored wire and a preparation method thereof.
Background
The flux-cored wire is focused and regarded as important, and is applied to outdoor welding of parts such as petroleum, bridges, natural gas, ships, ocean platforms and the like, the proportion of welding materials of the flux-cored wire for submerged arc welding in the United states is increased from 12.5% in the 70 th year of 20 th century to 21.1% in the 80 th year to 2009, the total output reaches 7 ten thousand tons, accounts for 30-40% of the total amount of the welding materials, and at the end of the 70 th year in China, hundreds of tons of submerged arc welding flux-cored wires are introduced from abroad to Bao steel and are applied to the fields such as metallurgy, locomotive vehicles and the like.
The foreign submerged arc welding flux-cored wire is mainly characterized in that a correlation model is established by researching the deposited metal performance of two submerged arc welding flux-cored wires with aluminum contents of 1.7% and 0.53% respectively, the microstructure change of the submerged arc welding flux-cored wires is predicted, according to the thermodynamic calculation, AlN in a high-aluminum welding seam is superior to Ti (C, N) and A1203 in advance, and a low-aluminum welding seam is opposite; kinetic calculation shows that a large amount of gamma-Fe exists in low-aluminum deposited metal at high temperature, gamma-Fe and alpha-Fe coexist in high aluminum, and the matrix structure changes differently under different cooling rates.
The generation of the flux-cored wire in China currently exists: the product quality and stability need to be further improved, although the production technology of the flux-cored wire in China has a great breakthrough, the product still needs to be made in the aspects of pit resistance, air hole resistance, reduction of smoke dust, splash reduction, further improvement of the product quality stability and the like, and the product variety and specification need to be increased urgently; at present, the varieties of flux-cored wire products in China are single, the product specifications are incomplete, different requirements of various industries cannot be met, and varieties and specifications meeting different requirements are urgently needed to be added; the production scale degree should be further enlarged, the production scale of the product is small, many problems such as high product cost, poor product quality stability and the like can be caused, and the virtuous circle can be entered only when a certain production scale is reached.
From the current high-hardness surfacing materials at home and abroad, almost all the materials have the hardness of more than or equal to 60 HRC; the surfacing material has high carbon and chromium content, belongs to a high-carbon and high-chromium alloy system, is usually suitable for working conditions which are seriously anti-abrasion and insensitive to cracks, allows a small amount of cracks to exist in the using process, and is obviously unsuitable for a roller surfacing layer with high requirements on toughness and crack resistance.
Disclosure of Invention
The invention improves the toughness and crack resistance of the deposited metal while improving the hardness of the deposited metal, improves the toughness and crack resistance of the high-hardness deposited metal from two aspects of metallurgy and process, improves the toughness and crack resistance of the high-hardness deposited metal, and simultaneously ensures good welding manufacturability, easy slag removal, no splashing, high hardness and excellent wear resistance, and the invention content is as follows:
a submerged arc welding flux-cored wire comprises a steel strip and a flux core, wherein the steel strip comprises the following chemical components in percentage by weight: less than or equal to 0.02 percent of C, 0.2-1.2 percent of Mn0.3-1.8 percent of Si, 22-28 percent of Cr, 2-8 percent of W, 0.2-0.4 percent of Cu, 0.1-0.3 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-35% of marble, 15-28% of fluorite, 7-12% of mica, 6-14% of titanium dioxide, 2-8% of ferrovanadium, 2-6% of ferrosilicon, 2-12% of ferrotitanium, 13-17% of ferroboron, 2-8% of ferromolybdenum, 3-12% of graphite and the balance of ferrochromium.
Carbon in the steel strip: the hardness of the deposited metal tends to be reduced along with the increase of the content of C, the abrasion volume tends to be increased, namely, the abrasion resistance of the deposited metal is reduced, because the Ms point is sharply reduced along with the increase of the content of C, the content of the retained austenite is increased, the content of martensite is reduced, and the hardness and the abrasion resistance of the deposited metal are reduced due to the relative change of the contents of the martensite and the austenite which are much higher than those of the martensite; the change trend of the crack length is an upper parabola from the center of the abscissa, i.e., no crack is generated when the C content is below a certain level, and the crack resistance is rapidly reduced as the C content increases after a certain level.
Silicon and manganese in the steel strip: si: the element is a strong ferrite forming element, si not only has the effect of improving solid solution strengthening in ferrite and austenite, but also has the deoxidation effect, reduces the oxygen content in a welding line and reduces the adverse effect of oxygen on welding line metal; mn is a stable austenite element, reduces the Ms point and improves the hardenability; in addition, Mn is a good deoxidizer and desulfurizer, Mn and si have combined action to be beneficial to reducing the oxygen content in the weld joint, and form MnS by combining with S, thereby preventing the formation of FeS with low melting point, preventing the tendency of generating thermal cracks in weld metal and improving the ability of resisting thermal cracks of the weld joint; mn and iron can form a solid solution, so that the strength and hardness of ferrite and austenite in steel are improved, and the Mn and iron are weak carbide forming elements to replace part of Fe in cementite to form composite cementite; however, excessive Mn content coarsens the crystal grains of the steel, reduces the ductility of the steel, and decreases the toughness.
Chromium in the steel strip: as the Cr content increases, the hardness of the deposited metal decreases and the wear volume increases, which does not indicate that Cr can reduce the hardness and wear resistance of the deposited metal; since in the submerged arc welding flux-cored wire, a plurality of carbide forming elements (Cr, Mo, V, W and the like) coexist, according to the law of mass action, the increase of the Cr content will cause the Cr content to increase7C3The carbide of chromium is increased, and the carbide of Mo, W and V is relatively reduced, so that the secondary hardening effect of the carbide is weakened, and the hardness and the wear resistance of the deposited metal are reduced; therefore, the hardness and the wear resistance of the complex alloy system are not necessarily increased by only increasing the content of a single element; the influence of Cr on the crack length is an upper parabolic rule, which shows that the Cr content in the deposited metal also has an optimal value, and the crack resistance of the metal is deteriorated when the Cr content is higher or lower than the optimal value; at the same time, above or below the optimum Cr content, this results in a deposit with a higher impact energyReducing; thus, for a deposited metal alloy system, finding the optimum Cr content will result in improved crack resistance and toughness.
V in the steel strip: with the increase of the content of V, the deposited metal has the same change trend as Mo, but the change is more rapid, and in terms of mechanism, V has the similar action as Mo in the deposited metal, but the secondary hardening effect of V is greater than that of Mo, so the action is more prominent; below a certain value, the crack length decreases with increasing V content, and when the V content exceeds this value, the crack length is zero, which is mainly related to the grain refining effect of V.
W in the steel strip: the effect of the alloy is similar to that of aluminum, but the effect is only half of that of aluminum, and the improvement of impact toughness is facilitated by adding a proper amount of the alloy, namely, the added tungsten element is mostly distributed in a solid solution, a small amount of the tungsten element enters carbide, and relatively more carbide is formed when the tempering time is longer; 2% -8% of W is added into the welding wire, so that the toughness of the steel can be improved, and W is one of important elements for improving the high-temperature stability of the steel.
The graphite acts on the medicine core: graphite and alloy elements can be combined to generate carbide, which is beneficial to improving the hardness and wear resistance of the surfacing metal; the graphite is easy to oxidize at high temperature, can generate carbon monoxide gas and is beneficial to protecting molten pool metal from being oxidized or nitrided under electric arc; because graphite is a strong deoxidizer at high temperature, the transition of alloy elements is protected; the graphite deoxidation reaction can generate a large amount of heat, is beneficial to the thermal ionization of metal, and can ensure that the arc striking and stabilizing performance of the welding wire becomes good, so that the graphite is a good lubricant and is beneficial to partially improving the slag removal performance of the flux-cored welding wire during welding.
The addition amount of graphite in the flux core has great influence on the structure of the overlaying layer, and when the amount of graphite is less, the structure of the overlaying layer mainly comprises carbide, low-carbon martensite and retained austenite; when the addition amount of the graphite is excessive, a bamboo-leaf-shaped high-carbon martensite structure appears in surfacing; the addition of the graphite also has great influence on the hardness of the overlaying layer, the hardness of the overlaying layer is increased along with the increase of the addition of the graphite, but when the added graphite exceeds a certain amount, the hardness of the overlaying layer is not obviously increased and tends to be reduced; the method is mainly characterized in that when the adding amount of graphite is less, the number of formed carbide reinforced particles is less, the strengthening effect on a matrix is small, and the hardness of a surfacing layer is not improved; in addition, along with the increase of the graphite amount, the combination chance of carbon and alloy elements is increased, the formation amount of carbide is increased, the hardness of the overlaying layer is favorably improved, after the graphite amount exceeds a certain value, the chance of forming high-carbon martensite and residual austenite on the overlaying layer is increased, and along with the increase of the carbon content of the overlaying layer, the residual austenite amount is increased, but the improvement of the hardness of the overlaying layer is not favorably realized, although the processing performance of the welding rod becomes better along with the increase of the graphite addition amount in the flux core, the electric arc burns stably, the arc striking is easy, but the crack resistance of the overlaying layer is poor, cracks are easy to occur under the condition of no preheating and slow cooling welding, therefore, the graphite addition amount in the flux core needs to be controlled, and the consideration is given to the above, and the upper level and the lower level of the graphite addition amount in the flux coating are respectively 3% and.
And (3) marble: the function in the welding process is arc stabilization, desulfuration and indirect dephosphorization; CO2 gas is generated through decomposition to protect welding seams, short slag is generated, directional welding is facilitated, and harm caused by excessive use amount is as follows: the melting point of the powder can be increased, so that the welding speed is reduced, the welding seam is rough and not attractive in forming, and pores are easy to generate in the welding seam due to the fact that the viscosity of slag is increased due to the increase of the melting point; the main chemical components are as follows: s is less than or equal to 0.03 percent, P is less than or equal to 0.03 percent, CaCO is more than or equal to 95 percent, and the function in the coating of the welding rod is as follows: mainly plays the roles of gas making and slag making, and can stabilize arc and desulfurize.
Fluorite: the slag former and the strong diluent improve the physical and chemical properties of the slag, can reduce the melting point, viscosity and surface tension of the slag, increase the fluidity of the slag, enable gas in a welding seam to easily escape, reduce the diffusible hydrogen content of welding seam metal, but excessive slag removal is difficult.
Mica: the silicate mineral belongs to a layered structure, is a subspecies of the very fine scaly muscovite in the mica group, because the comprehensive properties of the mica, such as plasticity, smoothness, viscosity and the like, are better than those of titanium dioxide, white mud, sepiolite, silicon mud, pyrophyllite and the like, the mica contains about 38 percent of Al203 which is higher than those of the white mud, the pyrophyllite and the sepiolite, the surface tension of the Al203 is higher than that of TiO2, Si02, Ca0 and the like, when the content of the Al203 is too high, the slag removal performance of the welding wire is poor, and the content of the mica is selected to be 7-12 percent in conclusion.
Titanium dioxide: the main components are TiO2, a slagging agent and a slag shell main component, short slag can improve the covering performance and the thermal desludging performance of slag, and also has the effects of stabilizing and concentrating electric arc and calming a molten pool so as to reduce splashing.
Ferromolybdenum: the ordinal number of molybdenum in a periodic table of elements is 42, the molybdenum is of a typical body-centered cubic structure, the molybdenum element is added into the surfacing alloy, so that 'multi-change' cracks can be effectively formed, the plasticity of the surfacing alloy can be improved, the molybdenum also has the effects of refining grains and strengthening solid solution, the solid solution strengthening effect on ferrite is particularly obvious, in addition, the Mo also can optimize the technological performance of the surfacing flux-cored wire, molten drops are not easy to dent in the surfacing process, and the like, Mo exists mostly in the form of solid solution or carbide in the surfacing alloy, the molybdenum content is low, the molybdenum content forms solid solution with iron and carbon, and carbides such as MoC, Mo2C and the like can be formed after the molybdenum content reaches a certain value; the molybdenum carbide is mainly formed in the form of eutectic reaction, thereby improving the toughness of the weld metal.
The influence of the addition of ferrotitanium in the flux core on the hardness of the metal of the overlaying layer is obvious, the hardness of the overlaying layer is improved along with the increase of the titanium content of the welding rod, and the wear resistance is obviously improved, because titanium carbide particles are generated in situ by the welding metallurgical reaction, the titanium content in the flux core is continuously increased, a large amount of carbides are precipitated, the carbon content of the overlaying layer is reduced, the reduction of the carbon content of a matrix enables the formed reticular cementite in the overlaying layer to be gradually reduced until the reticular cementite disappears, and although the quantity of the titanium carbide particles in the overlaying layer is increased, the wear resistance of the overlaying layer is basically not changed greatly due to the disappearance of the reticular cementite; with the further increase of the content of ferrotitanium in the flux core, the precipitation of a large amount of carbide provides a wear-resistant hard phase for the surfacing layer, and simultaneously, the content of carbon and alloy elements in the matrix is also reduced, the formation of low-carbon martensite is facilitated under the rapid cooling condition of welding, the toughness of the matrix is improved, so that the bonding force between the matrix and the carbide reinforced phase is increased, and the wear resistance of the surfacing layer is improved, therefore, the upper level and the lower level of the addition amount of ferrotitanium are determined to be 2% and 12%.
B, iron and boron: b and Fe generate brittle compounds, and when the content is more, the high-chromium alloy is easy to generate cold cracks; with the increase of the content of B, eutectoid reaction occurs in the gamma-Fe in sequence to generate Fe2B, Ms (C, B), wherein the form of boride is changed from particle or short rod shape into fishbone shape and honeycomb shape; when ferroboron is increased to 13%, ternary eutectic reaction occurs to generate Fe2B+M3(C, B), the form is changed into chrysanthemum shape, and the chrysanthemum shape is beneficial to both hardness and wear resistance; as B increases, the number and volume of primary carbides of the alloy increases; influence of B on the hardness of high chromium alloys: the hardness of B in the alloy is comprehensively influenced by gamma-Fe or alpha-Fe and a carborundum, and the hardness of ferroboron within 1.2-1.8 percent is mainly influenced by the quantity and the volume of primary carbide and the carborundum; therefore, with the increase of the content of B, the increase of the hardness of the alloy is larger when the hardness is 13-17% ferroboron than when the hardness is 0-12% ferroboron; b effect on wear resistance of high chromium alloys: the increase of ferroboron within a certain range (13-17%) can increase the volume fraction of primary carbide and boride, the distribution is more uniform, and the wear resistance is greatly improved, but when the ferroboron content exceeds the range (13-17%), the volume of the primary carbide becomes coarse along with the increase of ferroboron content, the primary carbide grows in an aggregation manner, and the increase slope of the wear resistance becomes smaller on the contrary.
Silicon iron: the proper Si content can reduce the splashing in open arc welding, increase the fluidity of molten pool metal, reduce slag adhesion and ensure the attractive appearance of a welding line; proper amount of Si refines matrix structure and primary carbide grains in the high-chromium alloy, promotes nucleation of M7C3, is uniformly distributed, and is beneficial to improving the wear resistance; when the Si is excessive, the segregation degree of the C is increased, eutectic carbides and primary carbides grow up in a segregation manner, and the wear resistance is reduced; c. as the Si content increases, the C in the matrix is depleted, the hardness of the alloy decreases, but the wear resistance varies in different ways, with the least amount of wear at contents of 2-6%.
Meanwhile, the invention also discloses a preparation process of the submerged arc welding flux-cored wire, which comprises the following steps: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder, wherein the sintering temperature is 620-sand and the heat preservation time is 720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
The invention has the beneficial effects that:
according to the invention, the C content is controlled within the range of less than or equal to 0.02%, so that the crack resistance of the surfacing metal is improved; meanwhile, the oxygen content in the weld joint is reduced by adopting the combined action of Mn and Si, and simultaneously, the generation of FeS with low melting point is prevented, so that the hot crack resistance of the surfacing metal is improved; in addition, the contents of graphite, mica and marble in the flux core are controlled, so that the welding process performance of the welding wire is improved; in addition, the content of alloy components in the flux core is controlled to obtain the surfacing metal with high strength and toughness, high hardness and high wear resistance.
Drawings
FIG. 1 is a schematic view of a flux cored wire build up welding process of the present invention.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Preparing a steel belt and medicinal powder components, wherein the steel belt comprises the following chemical components in percentage by weight: less than or equal to 0.02 percent of C, 0.2-1.2 percent of Mn0.3-1.8 percent of Si, 22-28 percent of Cr, 2-8 percent of W, 0.2-0.4 percent of Cu, 0.1-0.3 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-35% of marble, 15-28% of fluorite, 7-12% of mica, 6-14% of titanium dioxide, 2-8% of ferrovanadium, 2-6% of ferrosilicon, 2-12% of ferrotitanium, 13-17% of ferroboron, 2-8% of ferromolybdenum, 3-12% of graphite and the balance of ferrochromium.
Example one
Preparing a steel belt and medicinal powder components, wherein the steel belt comprises the following chemical components in percentage by weight: less than or equal to 0.02 percent of C, 0.2 to 0.4 percent of Mn0.3 to 1.3 percent of Si, 22 to 24 percent of Cr, 2 to 6 percent of W, 0.2 to 0.3 percent of Cu, 0.1 to 0.3 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-25% of marble, 15-20% of fluorite, 7-11% of mica, 6-11% of titanium dioxide, 2-8% of ferrovanadium, 2-4% of ferrosilicon, 2-12% of ferrotitanium, 13-17% of ferroboron, 2-8% of ferromolybdenum, 3-5% of graphite and the balance of ferrochromium.
The preparation process of the submerged-arc welding flux-cored wire comprises the following steps: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder, wherein the sintering temperature is 620-sand and the heat preservation time is 720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5mm, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
Grinding wheels are polished on two sides of Q350 steel, oxide skin and iron rust are removed, welding technological parameters of the submerged arc surfacing welding machine are set according to requirements, and the method specifically comprises the following steps: welding current: 350-420A, the welding voltage is 28-35V, the surfacing speed is 25-28cm/min, a layer of welding line is continuously and longitudinally surfaced along the middle point of the test plate, the second layer and the third layer are surfaced after cooling, no splashing exists in the welding process, and slag is easily removed; the test shows that: the hardness is 72HRC, the impact energy is 50J at normal temperature, the abrasion loss is 0.6g, and the crack length is 1.2 cm.
Example two
Preparing a steel belt and medicinal powder components, wherein the steel belt comprises the following chemical components in percentage by weight: less than or equal to 0.01 percent of C, 0.2-0.4 percent of Mn0.3-1.3 percent of Si, 26-28 percent of Cr, 2-3 percent of W, 0.2-0.3 percent of Cu, 0.1-0.2 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-35% of marble, 15-17% of fluorite, 7-11% of mica, 10-14% of titanium dioxide, 6-8% of ferrovanadium, 2-4% of ferrosilicon, 2-12% of ferrotitanium, 13-15% of ferroboron, 2-3% of ferromolybdenum, 3-5% of graphite and the balance of ferrochromium.
The preparation process of the submerged-arc welding flux-cored wire comprises the following steps: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder, wherein the sintering temperature is 620-sand and the heat preservation time is 720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5cm, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
Grinding wheels are polished on two sides of Q350 steel, oxide skin and iron rust are removed, welding technological parameters of the submerged arc surfacing welding machine are set according to requirements, and the method specifically comprises the following steps: welding current: 350-420A, the welding voltage is 28-35V, the surfacing speed is 25-28cm/min, a layer of welding line is continuously and longitudinally surfaced along the middle point of the test plate, the second layer and the third layer are surfaced after cooling, no splashing exists in the welding process, and slag is easily removed; the test shows that: the hardness was 82HRC, the impact strength at room temperature was 61J, the abrasion loss was 0.7g, and the crack length was 1.4 cm.
EXAMPLE III
Preparing a steel belt and medicinal powder components, wherein the steel belt comprises the following chemical components in percentage by weight: less than or equal to 0.01 percent of C, 0.2-0.4 percent of Mn0.3-1.1 percent of Si, 22-25 percent of Cr, 2-3 percent of W, 0.2-0.3 percent of Cu, 0.1-0.2 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 28-35% of marble, 15-17% of fluorite, 7-9% of mica, 10-14% of titanium dioxide, 6-8% of ferrovanadium, 2-4% of ferrosilicon, 2-3% of ferrotitanium, 13-15% of ferroboron, 6-8% of ferromolybdenum, 3-4% of graphite and the balance of ferrochromium.
The preparation process of the submerged-arc welding flux-cored wire comprises the following steps: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder, wherein the sintering temperature is 620-sand and the heat preservation time is 720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5cm, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
Grinding wheels are polished on two sides of Q350 steel, oxide skin and iron rust are removed, welding technological parameters of the submerged arc surfacing welding machine are set according to requirements, and the method specifically comprises the following steps: welding current: 350-420A, the welding voltage is 28-35V, the surfacing speed is 25-28cm/min, a layer of welding line is continuously and longitudinally surfaced along the middle point of the test plate, the second layer and the third layer are surfaced after cooling, no splashing exists in the welding process, and slag is easily removed; the test shows that: the hardness was 77HRC, the impact work at room temperature was 64J, the abrasion loss was 0.54g, and the crack length was 1.2 cm.
Example four
Preparing a steel belt and medicinal powder components, wherein the steel belt comprises the following chemical components in percentage by weight: less than or equal to 0.01 percent of C, 0.2-0.4 percent of Mn0.8-1.1 percent of Si, 22-23 percent of Cr, 2-3 percent of W, 0.3-0.4 percent of Cu, 0.1-0.2 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 30-35% of marble, 15-17% of fluorite, 7-9% of mica, 10-13% of titanium dioxide, 2-4% of ferrovanadium, 2-4% of ferrosilicon, 8-11% of ferrotitanium, 13-15% of ferroboron, 6-8% of ferromolybdenum, 3-4% of graphite and the balance of ferrochromium.
The preparation process of the submerged-arc welding flux-cored wire comprises the following steps: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder, wherein the sintering temperature is 620-sand and the heat preservation time is 720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5cm, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
Grinding wheels are polished on two sides of Q350 steel, oxide skin and iron rust are removed, welding technological parameters of the submerged arc surfacing welding machine are set according to requirements, and the method specifically comprises the following steps: welding current: 350-420A, the welding voltage is 28-35V, the surfacing speed is 25-28cm/min, a layer of welding line is continuously and longitudinally surfaced along the middle point of the test plate, the second layer and the third layer are surfaced after cooling, no splashing exists in the welding process, and slag is easily removed; the test shows that: the hardness is 79HRC, the impact work at normal temperature is 59J, the abrasion loss is 0.65g, and the crack length is 1.1 cm.
EXAMPLE five
Preparing a steel belt and medicinal powder components, wherein the steel belt comprises the following chemical components in percentage by weight: less than or equal to 0.01 percent of C, 0.8-1.2 percent of Mn0.8-1.1 percent of Si, 22-23 percent of Cr, 6-8 percent of W, 0.3-0.4 percent of Cu, 0.1-0.2 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 30-35% of marble, 15-17% of fluorite, 7-9% of mica, 10-13% of titanium dioxide, 2-4% of ferrovanadium, 2-4% of ferrosilicon, 8-11% of ferrotitanium, 13-15% of ferroboron, 2-4% of ferromolybdenum, 9-12% of graphite and the balance of ferrochromium.
The preparation process of the submerged-arc welding flux-cored wire comprises the following steps: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder, wherein the sintering temperature is 620-sand and the heat preservation time is 720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5cm, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
Grinding wheels are polished on two sides of Q350 steel, oxide skin and iron rust are removed, welding technological parameters of the submerged arc surfacing welding machine are set according to requirements, and the method specifically comprises the following steps: welding current: 350-420A, the welding voltage is 28-35V, the surfacing speed is 25-28cm/min, a layer of welding line is continuously and longitudinally surfaced along the middle point of the test plate, the second layer and the third layer are surfaced after cooling, no splashing exists in the welding process, and slag is easily removed; the test shows that: the hardness was 71HRC, the impact strength at room temperature was 54J, the abrasion loss was 0.63g, and the crack length was 0.9 cm.
EXAMPLE six
Preparing a steel belt and medicinal powder components, wherein the steel belt comprises the following chemical components in percentage by weight: less than or equal to 0.01 percent of C, 0.8-1.2 percent of Mn0.8-1.1 percent of Si, 26-28 percent of Cr, 2-5 percent of W, 0.2-0.3 percent of Cu, 0.1-0.2 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 33-35% of marble, 15-17% of fluorite, 7-9% of mica, 6-10% of titanium dioxide, 2-4% of ferrovanadium, 2-4% of ferrosilicon, 8-11% of ferrotitanium, 13-15% of ferroboron, 2-4% of ferromolybdenum, 3-6% of graphite and the balance of ferrochromium.
The preparation process of the submerged-arc welding flux-cored wire comprises the following steps: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder, wherein the sintering temperature is 620-sand and the heat preservation time is 720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5cm, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
Grinding wheels are polished on two sides of Q350 steel, oxide skin and iron rust are removed, welding technological parameters of the submerged arc surfacing welding machine are set according to requirements, and the method specifically comprises the following steps: welding current: 350-420A, the welding voltage is 28-35V, the surfacing speed is 25-28cm/min, a layer of welding line is continuously and longitudinally surfaced along the middle point of the test plate, the second layer and the third layer are surfaced after cooling, no splashing exists in the welding process, and slag is easily removed; the test shows that: the hardness was 69HRC, the impact strength at room temperature was 61J, the abrasion loss was 0.66g, and the crack length was 1.0 cm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A submerged arc welding flux-cored wire comprises a steel strip and a flux core, and is characterized in that: the steel strip comprises the following chemical components in percentage by weight: less than or equal to 0.02 percent of C, 0.2-1.2 percent of Mn0.3-1.8 percent of Si, 22-28 percent of Cr, 2-8 percent of W, 0.2-0.4 percent of Cu, 0.1-0.3 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-35% of marble, 15-28% of fluorite, 7-12% of mica, 6-14% of titanium dioxide, 2-8% of ferrovanadium, 2-6% of ferrosilicon, 2-12% of ferrotitanium, 13-17% of ferroboron, 2-8% of ferromolybdenum, 3-12% of graphite and the balance of ferrochromium.
2. The submerged arc welding flux-cored wire of claim 1, wherein: the steel strip comprises the following chemical components in percentage by weight: less than or equal to 0.02 percent of C, 0.2 to 0.4 percent of Mn0.3 to 1.3 percent of Si, 22 to 24 percent of Cr, 2 to 6 percent of W, 0.2 to 0.3 percent of Cu, 0.1 to 0.3 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-25% of marble, 15-20% of fluorite, 7-11% of mica, 6-11% of titanium dioxide, 2-8% of ferrovanadium, 2-4% of ferrosilicon, 2-12% of ferrotitanium, 13-17% of ferroboron, 2-8% of ferromolybdenum, 3-5% of graphite and the balance of ferrochromium.
3. The submerged arc welding flux-cored wire of claim 1, wherein: the steel strip comprises the following chemical components in percentage by weight: less than or equal to 0.01 percent of C, 0.2-0.4 percent of Mn0.3-1.3 percent of Si, 26-28 percent of Cr, 2-3 percent of W, 0.2-0.3 percent of Cu, 0.1-0.2 percent of V, less than or equal to 0.005 percent of S, less than or equal to 0.006 percent of P, and the balance of Fe; the flux core comprises the following components in percentage by weight: 20-35% of marble, 15-17% of fluorite, 7-11% of mica, 10-14% of titanium dioxide, 6-8% of ferrovanadium, 2-4% of ferrosilicon, 2-12% of ferrotitanium, 13-15% of ferroboron, 2-3% of ferromolybdenum, 3-5% of graphite and the balance of ferrochromium.
4. The method for preparing the submerged arc welding flux-cored wire according to claim 1, characterized in that: the method comprises the following steps:
cleaning a steel belt: carrying out degreasing and deoiling treatment by using lime powder, a liquid cleaning agent and ultrasonic auxiliary cleaning, and drying at a steel belt cleaning outlet by using hot air at 150 ℃ to ensure that a welding wire is dry and clean before entering a rolling mill;
pretreatment of medicinal powder: weighing the components of the flux core of the welding wire, and placing the components into a powder baking box for powder baking at the temperature of 200-300 ℃ for 1-3 h; after the powder is dried, taking out the powder and sieving the powder to ensure that the granularity of the powder is between 80 and 100 meshes, and carrying out high-temperature heating sintering on the sieved powder at the sintering temperature of 620-720 ℃ for 2 hours;
powder feeding treatment: the steel belt is discharged from the belt discharging machine, the rough surface is upward, the tension of the belt discharging machine is stable, the steel belt enters a forming machine through a guide belt, the U shape is finished after the steel belt passes through a forming roller, powder is fed onto the U-shaped steel belt through powder feeding equipment, and the filling rate of the powder is controlled to be 12-17%;
drawing process: the rough drawing passes through 7 drawing dies, the diameter of the final welding wire is 4.5mm, the fine drawing passes through 8 drawing dies, and the diameter of the welding wire after the fine drawing is 2.4 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010780519.1A CN112059469B (en) | 2018-11-28 | 2018-11-28 | Preparation method of submerged-arc welding flux-cored wire |
| CN201811433775.2A CN109434321B (en) | 2018-11-28 | 2018-11-28 | Submerged arc welding flux-cored wire and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811433775.2A CN109434321B (en) | 2018-11-28 | 2018-11-28 | Submerged arc welding flux-cored wire and preparation method thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010780519.1A Division CN112059469B (en) | 2018-11-28 | 2018-11-28 | Preparation method of submerged-arc welding flux-cored wire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109434321A CN109434321A (en) | 2019-03-08 |
| CN109434321B true CN109434321B (en) | 2020-10-27 |
Family
ID=65554373
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010780519.1A Active CN112059469B (en) | 2018-11-28 | 2018-11-28 | Preparation method of submerged-arc welding flux-cored wire |
| CN201811433775.2A Active CN109434321B (en) | 2018-11-28 | 2018-11-28 | Submerged arc welding flux-cored wire and preparation method thereof |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010780519.1A Active CN112059469B (en) | 2018-11-28 | 2018-11-28 | Preparation method of submerged-arc welding flux-cored wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN112059469B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114346369A (en) * | 2021-12-29 | 2022-04-15 | 苏州优霹耐磨复合材料有限公司 | Surfacing manufacturing method of wear-resisting plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923435A (en) * | 2006-09-08 | 2007-03-07 | 攀钢集团攀枝花钢铁研究院 | Pile-up welding flux-cored wire for restoring cold rolling intermediate roller operational layer and method for manufacturing same |
| CN102069322A (en) * | 2010-12-24 | 2011-05-25 | 中国船舶重工集团公司第七二五研究所 | High-strength carbon dioxide protecting surfacing flux-cored wire |
| CN104959746A (en) * | 2015-04-18 | 2015-10-07 | 盐城市成功机械制造有限公司 | Self-shielded flux-cored wire for extrusion roller remanufacturing |
| JP2016087622A (en) * | 2014-10-31 | 2016-05-23 | 日鐵住金溶接工業株式会社 | Flux-cored wire for gas shield arc welding of high-tensile steel |
| CN106112303A (en) * | 2016-07-28 | 2016-11-16 | 江苏科技大学 | A kind of multicomponent nitride Strengthening and Toughening self protection pile-up welding flux core welding wire and preparation method thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3747237B2 (en) * | 2000-05-01 | 2006-02-22 | 株式会社神戸製鋼所 | Flux-cored wire for gas shielded arc welding for heat-resistant steel |
| CN101301708B (en) * | 2008-06-27 | 2010-04-07 | 陈冬 | Improved welding material with tolerance of liquid zinc and aluminiferous zinc-base alloy |
| CN101837525B (en) * | 2010-06-10 | 2011-11-16 | 哈尔滨工业大学（威海） | Welding rod of arc welding in large heat input welding |
| CN103111774A (en) * | 2013-01-22 | 2013-05-22 | 天津诚信达金属检测技术有限公司 | T/P91 steel electrode and manufacturing method thereof |
| EP2952288B1 (en) * | 2013-01-31 | 2018-09-05 | Nippon Steel & Sumitomo Metal Corporation | Flux cored wire, welding method using flux cored wire, method for producing welded joint using flux cored wire, and welded joint |
| CN103149229A (en) * | 2013-03-04 | 2013-06-12 | 四川汉龙新材料有限公司 | Method for detecting material compositions and contents thereof of welding material |
| CN103433649B (en) * | 2013-08-12 | 2015-06-24 | 西安理工大学 | Welding rod for welding 1Ni9 steel and preparation method thereof |
-
2018
- 2018-11-28 CN CN202010780519.1A patent/CN112059469B/en active Active
- 2018-11-28 CN CN201811433775.2A patent/CN109434321B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1923435A (en) * | 2006-09-08 | 2007-03-07 | 攀钢集团攀枝花钢铁研究院 | Pile-up welding flux-cored wire for restoring cold rolling intermediate roller operational layer and method for manufacturing same |
| CN102069322A (en) * | 2010-12-24 | 2011-05-25 | 中国船舶重工集团公司第七二五研究所 | High-strength carbon dioxide protecting surfacing flux-cored wire |
| JP2016087622A (en) * | 2014-10-31 | 2016-05-23 | 日鐵住金溶接工業株式会社 | Flux-cored wire for gas shield arc welding of high-tensile steel |
| CN104959746A (en) * | 2015-04-18 | 2015-10-07 | 盐城市成功机械制造有限公司 | Self-shielded flux-cored wire for extrusion roller remanufacturing |
| CN106112303A (en) * | 2016-07-28 | 2016-11-16 | 江苏科技大学 | A kind of multicomponent nitride Strengthening and Toughening self protection pile-up welding flux core welding wire and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112059469A (en) | 2020-12-11 |
| CN109434321A (en) | 2019-03-08 |
| CN112059469B (en) | 2021-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2881487B1 (en) | Abrasion resistant steel plate with super-high strength and high toughness, and process for preparing same | |
| AU2014243611B2 (en) | High-toughness, low-alloy, wear-resistant steel sheet and method of manufacturing the same | |
| RU2569271C1 (en) | Welding of steel sheets by friction with mixing | |
| WO1994022606A1 (en) | Wear- and seizure-resistant roll for hot rolling | |
| WO1997036016A1 (en) | Low-alloy heat-treated pearlitic steel rails with excellent wear resistance and welding characteristics and process for production thereof | |
| CN111057945B (en) | 500 MPa-level high-toughness weather-resistant bridge steel and preparation method thereof | |
| CN101439446A (en) | High-strength steel high-ductility gas shielded welding wire | |
| CN112247399A (en) | 700 MPa-level annealing-free drawing high-strength steel gas protection solid welding wire | |
| CN108356447A (en) | G520 stainless steels and 25Cr2Ni4MoV steel alloys welding Self-protecting flux-cored wire and preparation method thereof | |
| WO1996028581A1 (en) | Rail having high wear resistance and high internal damage resistance, and its production method | |
| CN109434321B (en) | Submerged arc welding flux-cored wire and preparation method thereof | |
| JP4625415B2 (en) | Solid wire for gas shielded arc welding | |
| JP2002363702A (en) | Low segregation pearlite-based rail having excellent wear resistance and ductility | |
| CN113564470B (en) | 1700MPa heat-resistant steel for agricultural machinery and manufacturing method thereof | |
| CN110724874A (en) | High-manganese austenitic steel with corrosion and wear resistance and preparation method of hot rolled plate | |
| JP5053190B2 (en) | Perlite rail with excellent wear resistance and ductility | |
| JPH1192866A (en) | Bainitic steel rail excellent in joinability in weld zone, and its production | |
| KR960000413B1 (en) | Flux cored wire | |
| JP3117916B2 (en) | Manufacturing method of pearlitic rail with excellent wear resistance | |
| JP3117915B2 (en) | Manufacturing method of high wear resistant pearlite rail | |
| JP4828109B2 (en) | Perlite steel rail | |
| CN115354215B (en) | High-speed steel pinch roll and preparation method thereof | |
| JP2001020204A (en) | Thermit welding joint of bainite steel rail | |
| JP2004043863A (en) | Rail having reduced amount of pro-eutectoid cementite structure formed in rail column section | |
| CN117867388A (en) | High-cleanliness corrosion-resistant saw blade steel for cutting middle-low-end stone and production method |
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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200928 Address after: No.20-3, North District, Zhongtian Century Huacheng, Ganxi East Street, houtang community, Jiangbei street, Dongyang City, Jinhua City, Zhejiang Province Applicant after: Dongyang Xinlian Industrial Design Co.,Ltd. Address before: 523808 Dongguan Institute of Technology, No. 1 University Road, Songshan Lake Science and Technology Industrial Park, Dongguan City, Guangdong Province Applicant before: DONGGUAN University OF TECHNOLOGY |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221025 Address after: 225300 Shengao Town Industrial Park, Jiangyan District, Taizhou City, Jiangsu Province Patentee after: JIANGSU JIATENG NEW MATERIAL Co.,Ltd. Address before: 322100 no.20-3, North District, Zhongtian Century Flower City, Ganxi East Street, houtang community, Jiangbei street, Dongyang City, Jinhua City, Zhejiang Province Patentee before: Dongyang Xinlian Industrial Design Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A submerged arc welding flux cored wire and its preparation method Granted publication date: 20201027 Pledgee: Bank of China Limited Jiangyan Branch Pledgor: JIANGSU JIATENG NEW MATERIAL Co.,Ltd. Registration number: Y2024980004718 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |