CN105269174A - 460MPa-level flux-cored wire for ocean engineering and application thereof - Google Patents
460MPa-level flux-cored wire for ocean engineering and application thereof Download PDFInfo
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- CN105269174A CN105269174A CN201510728502.0A CN201510728502A CN105269174A CN 105269174 A CN105269174 A CN 105269174A CN 201510728502 A CN201510728502 A CN 201510728502A CN 105269174 A CN105269174 A CN 105269174A
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- flux
- cored wire
- ocean engineering
- medicine core
- 460mpa
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
Abstract
The invention provides a 460MPa-level flux-cored wire for ocean engineering. The 460MPa-level flux-cored wire comprises a carbon steel sheath and a flux core, wherein the carbon steel sheath accounts for 84-87% of the total mass of the flux core; the flux core accounts for 13-16% of the total mass of the flux-cored wire; the flux-cored wire consists of the following components in percentage by mass: 30-42% of rutile, 1-2% of sodium fluoride, 3-6% of feldspar, 3-5% of ferrotitanium, 1-3% of silicon iron, 0.5-1% of rear earth, 3-5% of magnesium powder, 5-10% of electrolytic manganese, 1-2% of aluminum powder, 7-9% of nickel powder, 4-7% of ferroboron, 0.2-0.5% of graphite, 3-6% of silicon-manganese alloy, 0.5-1% of zircon sand and the balance of Fe and inevitable impurities. By virtue of control in aspects of chemical components, diffusible hydrogen, low-temperature stability and the like, the 460MPa-level flux-cored wire meets the requirements of crack resistance and low-temperature impact resistance, is good in all-position welding process, attractive in welding seam and excellent in mechanical property, has seawater corrosion resistance; and content of diffusible hydrogen of deposited metal reaches ultralow hydrogen level.
Description
Technical field
The invention belongs to technical field of welding materials, be specifically related to a kind of ocean engineering 460MPa level flux-cored wire and application thereof.
Background technology
Marine engineering equipment steel construction working environment is relatively more severe, stand seawater corrosion, and the natural forces such as alluvion destroy, therefore higher to the weld seam means suitable of offshore engineering structure, propose very high requirement to welding material.
At present, domestic ocean engineering platform equipment is built and is used 355MPa ~ 690MPa rank steel and supporting welding material in a large number, 355MPa ~ 420MPa the steel lower relative to intensity rank and welding material, the technical merit gap of internal and overseas is less, substantially can realize self-support.
But, intensity rank at the steel of 460MPa ~ 690MPa and welding material because technical requirement is higher, the domestic product also cannot producing stable performance, be mainly reflected in several aspects such as obdurability coupling, corrosion-resistant and workmanship stability, therefore, for high strength steel welding material still a large amount of dependence on import.This also causes the price of external similar welding material higher (at least exceeding domestic price 2 ~ 3 times), and cannot meet the demands on the supply of material ensures, causes integral installation for the delay of construction duration.Experience in Development for many years also shows: under one's control on critical material, will affect the development of whole industry.
Therefore, in building for current ocean engineering, the present situation that domestic high-strength steel welding material system support ability, combination property and external product gap are large, in the urgent need to developing a kind of marine engineering equipment 460MPa level welding material, realizing marine engineering equipment and building the production domesticization of supporting welding material.
Summary of the invention
In building for existing ocean engineering, the problem of domestic high-strength steel welding material system support ability, combination property instability, the invention provides a kind of ocean engineering 460MPa level flux-cored wire, its weld metal stable mechanical property, crack resistance are good, and diffusible hydrogen content is low.
Technical scheme of the present invention there is provided a kind of ocean engineering 460MPa level flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust accounts for flux-cored wire gross mass 84 ~ 87%, medicine core accounts for flux-cored wire gross mass 13 ~ 16%, it is as follows that the composition of described medicine core and content account for medicine core gross mass percentage: rutile: 30 ~ 42%, sodium fluoride: 1 ~ 2%, feldspar: 3 ~ 6%, ferrotianium: 3 ~ 5%, ferrosilicon: 1 ~ 3%, rare earth: 0.5 ~ 1%, magnesium powder: 3 ~ 5%, electrolytic manganese: 5 ~ 10%, aluminium powder: 1 ~ 2%, nickel powder: 7 ~ 9%, ferro-boron: 4 ~ 7%, graphite: 0.2 ~ 0.5%, silicomangan: 3 ~ 6%, zircon sand: 0.5 ~ 1%, surplus is Fe and inevitable impurity.
As one preferred embodiment, described medicine core consist of that medicine core accounts for flux-cored wire gross mass 13%, it is as follows that the composition of medicine core and content account for medicine core gross mass percentage: rutile: 42%, sodium fluoride: 2%, feldspar: 6%, ferrotianium: 5%, ferrosilicon: 3%, rare earth: 1%, magnesium powder: 5%, electrolytic manganese: 10%, aluminium powder: 2%, nickel powder: 9%, ferro-boron: 7%, graphite: 0.5%, silicomangan: 6%, zircon sand: 1%, surplus is Fe and inevitable impurity.
Further, above-mentioned carbon steel crust adopts the carbon steel steel band of low S, P, and the chemical constituent of this carbon steel steel band is C:0.048%, Si:0.21%, Mn:0.30%, S:0.006%, P:0.007%, and surplus is iron.
Further, in the chemical composition of above-mentioned medicine core, the mass ratio of Ti and B is 10:1.
Further, in above-mentioned ferro-boron, the mass fraction of boron is 0.9 ~ 1.8%.
Further, above-mentioned ferrosilicon adopts 75
#ferrosilicon, wherein the mass fraction of silicon is 70 ~ 77%.
Further, above-mentioned silicomangan adopts 63-22 silicomangan, and wherein the mass fraction of silicon is 19 ~ 23%.
Further, in above-mentioned ferrotianium, the mass fraction of titanium is 30 ~ 35%.
Ocean engineering 460MPa level flux-cored wire of the present invention adopts the sealing mode of docking O type or overlap joint O type.
This flux-cored wire provided by the invention is used for the supporting welding of marine engineering equipment 460Mpa level steel construction.
In the present invention, the design principle of each component is as follows:
The main component TiO of rutile
2, TiO
2it is the main component forming welding slag.TiO
2add can stable arc, reduce spatter, improve slag spreadability and the removability of slag; In addition, TiO
2can slag fluidity be improved, all-position welding be operated and becomes convenient easily grasp; As TiO in medicine core
2content lower than 30% time, above-mentioned feature is not obvious; As TiO in medicine core
2content higher than 42% time, not only destroy the spreadability of slag, and to mechanical property produce harmful effect; Therefore, TiO
2the percentage accounting for described medicine core powder gross weight is 30 ~ 42%.
The main component Al of feldspar
2o
3, K
2o, Na
2o, SiO
2, be also the main component of slag.Slag fusing point and viscosity can be regulated, improve appearance of weld, be conducive to weld seam to mother metal rounding off, slag and weld interface be increased, makes slag have good spreadability.Can not embody above-mentioned feature when addition in medicine core is less than 3%, when addition is large higher than 6%, in weld seam, oxygen content raises, and reduces the low-temperature impact toughness of weld metal; Therefore, feldspar accounts for the percentage of described medicine core powder gross weight is 3 ~ 6%.
Sodium fluoride (NaF) can dehydrogenation, and when its addition is greater than 2%, arc stability is bad, increases spatter and flue dust, and when addition is less than 1%, pore load mould, easily appears in dehydrogenation scarce capacity; Therefore, NaF accounts for the percentage of described medicine core powder gross weight is 1 ~ 2%.
Nickel powder (Ni) is favourable to raising low-temperature impact toughness, but Ni content can increase hot tearing sensitiveness higher than 9%.Therefore, Ni accounts for the percentage of described medicine core powder gross weight is 7 ~ 9%.
Electrolytic manganese (Mn) is main deoxidier, for reducing the oxygen content of weld metal, increases weld metal intensity and crack resistance, improves low-temperature impact toughness, regulate molten iron flow.And it is too high to add weld strength when Mn amount is greater than 10%, low-temperature impact toughness reduces; Therefore, Mn accounts for the percentage of described medicine core powder gross weight is 5 ~ 10%.
Magnesium powder (Mg) is strong deoxidier, improve low-temperature impact toughness, its addition improves low-temperature impact toughness scarce capacity when being less than 3%, add Mg amount when being greater than 5%, because deoxidation products magnesium oxide makes the fusing point of slag rise, setting rate is accelerated, and is unfavorable for eliminating and the appearance of weld of weld seam gas; Therefore, Mg accounts for the percentage of described medicine core powder gross weight is 3 ~ 5%.
Aluminium powder (Al) is strong deoxidier, add in right amount and can improve welding usability, improve impact flexibility simultaneously, but Al addition higher than 2% time low-temperature impact toughness can be caused to decline, therefore, control Al accounts for the percentage of described medicine core powder gross weight is 1 ~ 2%.
Ferrosilicon (Si-Fe) is main deoxidier, adds in right amount and can improve technique and deoxidation, and it is unfavorable too much to add processing performance, based on magnesium powder, aluminium powder in the present invention, and therefore 75
#the percentage that ferrosilicon accounts for described medicine core powder gross weight is 1 ~ 3%.
Adding in right amount of graphite (C) can increase arc stability, and improve welding wire performance, it is unfavorable that C added multipair low-temperature flexibility, and therefore, the percentage that control C accounts for described medicine core powder gross weight is 0.2 ~ 0.5%.
Silicomangan (Si-Mn) is main deoxidier and Transition-metal Alloys use, and the percentage accounting for described medicine core powder gross weight is 3 ~ 6%.
Adding in right amount of zircon sand can significantly improve weld seam low-temperature impact toughness, and its addition can make processing performance be deteriorated higher than 1%, and therefore, the percentage that controller accounts for described medicine core powder gross weight is 0.5 ~ 1%.
The elements such as S, P are impurity elements, and the anti-H 2 S ability of Resistance of Weld Metal has a strong impact on, and reduces the low-temperature impact toughness of weld metal simultaneously, S and Fe form Sulfide inclusion can bring out spot corrosion and stress corrosion cracking; The segregation effect of P is very strong, and cause weld metal uneven, especially cold brittleness increases, and therefore, S, P content is more few better.
Ferro-boron, ferro-titanium add as main deoxidier, the Ti of transition simultaneously element, crystal grain thinning, best results when Ti/B is 10:1 in weld seam, the percentage that ferro-boron accounts for described medicine core powder gross weight is 4 ~ 7%, and the percentage that ferrotianium accounts for described medicine core powder gross weight is 3 ~ 5%.
Rare earth can purify weld seam, and improve weld seam low-temperature impact toughness, too much add DeGrain, because of rare earth selling at exorbitant prices, therefore, controlling its percentage accounting for described medicine core powder gross weight is 0.5 ~ 1%.
Fe and iron powder, can improve conditions at the arc, and regulate molten iron fusing point and viscosity, surplus adds.
Compared with prior art, beneficial effect of the present invention:
(1) this ocean engineering 460MPa level flux-cored wire provided by the invention adopts rutile type slag, coordinates CO
2gas shield, welding arc stablility, evenly, slag fluidity is good, and appearance of weld is attractive in appearance, and all positon operating procedure is good in fusing.Weld metal stable mechanical property, crack resistance are good.
(2) this ocean engineering 460MPa level flux-cored wire provided by the invention adopts the mode of Al-Mn-Mg-Si combined deoxidation, reduces the oxygen content in weld seam; In slag making component, add stabilising arc containing matter, to meet the requirement of operative weldability energy; Meanwhile, adding the iron powder that S, P content is low, improve its deposition efficiency, by adding micro alloying element, rare-earth substance, making this flux-cored wire mother metal in mechanical property reach good coupling, obtain excellent low-temperature flexibility.
(3) deposited metal-40 DEG C of KV of this ocean engineering 460MPa level flux-cored wire provided by the invention
2average > 90J, its diffusible hydrogen content mercury process detects < 5.0mL/100g.
Detailed description of the invention
Embodiment 1:
Present embodiments provide a kind of ocean engineering 460MPa level flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust accounts for flux-cored wire gross mass 87%, medicine core accounts for flux-cored wire gross mass 13%, it is as follows that the composition of described medicine core and content account for medicine core gross mass percentage: rutile: 42%, sodium fluoride: 2%, feldspar: 6%, ferrotianium: 5%, 75
#ferrosilicon: 3%, rare earth: 1%, magnesium powder: 5%, electrolytic manganese: 10%, aluminium powder: 2%, nickel powder: 9%, ferro-boron: 7%, graphite: 0.5%, 63-22 silicomangan: 6%, zircon sand: 1%, surplus is Fe and inevitable impurity.
Wherein, carbon steel crust adopts the carbon steel steel band of low S, P, and the chemical constituent of this carbon steel steel band is C:0.048%, Si:0.21%, Mn:0.30%, S:0.006%, P:0.007%, and surplus is iron.
In the present embodiment, in described ferro-boron, the mass fraction of boron is 0.9 ~ 1.8%; Ferrosilicon adopts 75
#ferrosilicon, wherein the mass fraction of silicon is 70 ~ 77%; Silicomangan adopts 63-22 silicomangan, and wherein the mass fraction of silicon is 19 ~ 23%; In ferrotianium, the mass fraction of titanium is 30 ~ 35%.
The preparation method that component in employing the present embodiment prepares flux-cored wire is same as the prior art, and flux-cored wire adopts docking O type sealing mode.
The deposited metal composition test of the flux-cored wire prepared by the present embodiment, result is as shown in table 1.
The deposited metal Mechanics Performance Testing of the flux-cored wire prepared by the present embodiment, result is as shown in table 2.
Diffusible hydrogen test (mercury process) of the flux-cored wire prepared by the present embodiment, result is as shown in table 3.
The cracking resistance of the flux-cored wire prepared by the present embodiment, with CTOD verification experimental verification, CTOD result of the test is as shown in table 4.
In addition, the anti-seawater corrosion ability of the flux-cored wire prepared by the present embodiment, testing result shows, weld metal is suitable with mother metal steel plate anti-seawater corrosion ability.
This flux-cored wire provided by the invention is used for the supporting welding of marine engineering equipment 460Mpa level steel construction.
Embodiment 2:
Present embodiments provide a kind of ocean engineering 460MPa level flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust accounts for flux-cored wire gross mass 84%, medicine core accounts for flux-cored wire gross mass 16%, it is as follows that the composition of described medicine core and content account for medicine core gross mass percentage: rutile: 30%, sodium fluoride: 1%, feldspar: 3%, ferrotianium: 3%, 75
#ferrosilicon: 1%, rare earth: 0.5%, magnesium powder: 3%, electrolytic manganese: 5%, aluminium powder: 1%, nickel powder: 7%, ferro-boron: 4%, graphite: 0.2%, 63-22 silicomangan: 3%, zircon sand: 0.5%, surplus is Fe and inevitable impurity.
Wherein, carbon steel crust adopts the carbon steel steel band of low S, P, and the chemical constituent of this carbon steel steel band is C:0.048%, Si:0.21%, Mn:0.30%, S:0.006%, P:0.007%, and surplus is iron.
In the present embodiment, in described ferro-boron, the mass fraction of boron is 0.9 ~ 1.8%; Ferrosilicon adopts 75
#ferrosilicon, wherein the mass fraction of silicon is 70 ~ 77%; Silicomangan adopts 63-22 silicomangan, and wherein the mass fraction of silicon is 19 ~ 23%; In ferrotianium, the mass fraction of titanium is 30 ~ 35%.
The preparation method that component in employing the present embodiment prepares flux-cored wire is same as the prior art, and flux-cored wire adopts overlap joint O type sealing mode.
The deposited metal composition test of the flux-cored wire prepared by the present embodiment, result is as shown in table 1.
The deposited metal Mechanics Performance Testing of the flux-cored wire prepared by the present embodiment, result is as shown in table 2.
Diffusible hydrogen test (mercury process) of the flux-cored wire prepared by the present embodiment, result is as shown in table 3.
The cracking resistance of the flux-cored wire prepared by the present embodiment, with CTOD verification experimental verification, CTOD result of the test is as shown in table 4.
In addition, the anti-seawater corrosion ability of the flux-cored wire prepared by the present embodiment, testing result shows, weld metal is suitable with mother metal steel plate anti-seawater corrosion ability.
Embodiment 3:
Present embodiments provide a kind of ocean engineering 460MPa level flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust accounts for flux-cored wire gross mass 85%, medicine core accounts for flux-cored wire gross mass 15%, it is as follows that the composition of described medicine core and content account for medicine core gross mass percentage: rutile: 36%, sodium fluoride: 1.5%, feldspar: 4.5%, ferrotianium: 4%, 75
#ferrosilicon: 2%, rare earth: 0.7%, magnesium powder: 4%, electrolytic manganese: 8%, aluminium powder: 1.5%, nickel powder: 8%, 1% ferro-boron: 5.5%, graphite: 0.4%, 63-22 silicomangan: 4.5%, zircon sand: 0.7%, surplus is Fe and inevitable impurity.
Wherein, carbon steel crust adopts the carbon steel steel band of low S, P, and the chemical constituent of this carbon steel steel band is C:0.048%, Si:0.21%, Mn:0.30%, S:0.006%, P:0.007%, and surplus is iron.
In the present embodiment, in described ferro-boron, the mass fraction of boron is 0.9 ~ 1.8%; Ferrosilicon adopts 75
#ferrosilicon, wherein the mass fraction of silicon is 70 ~ 77%; Silicomangan adopts 63-22 silicomangan, and wherein the mass fraction of silicon is 19 ~ 23%; In ferrotianium, the mass fraction of titanium is 30 ~ 35%.
The preparation method that component in employing the present embodiment prepares flux-cored wire is same as the prior art, and flux-cored wire adopts overlap joint O type sealing mode.
The deposited metal composition test of the flux-cored wire prepared by the present embodiment, result is as shown in table 1.
The deposited metal Mechanics Performance Testing of the flux-cored wire prepared by the present embodiment, result is as shown in table 2.
Diffusible hydrogen test (mercury process) of the flux-cored wire prepared by the present embodiment, result is as shown in table 3.
The cracking resistance of the flux-cored wire prepared by the present embodiment, with CTOD verification experimental verification, CTOD result of the test is as shown in table 4.
In addition, the anti-seawater corrosion ability of the flux-cored wire prepared by the present embodiment, testing result shows, weld metal is suitable with mother metal steel plate anti-seawater corrosion ability.
Embodiment 4:
Present embodiments provide a kind of ocean engineering 460MPa level flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust accounts for flux-cored wire gross mass 84%, medicine core accounts for flux-cored wire gross mass 16%, it is as follows that the composition of described medicine core and content account for medicine core gross mass percentage: rutile: 40%, sodium fluoride: 2%, feldspar: 5%, ferrotianium: 4%, 75
#ferrosilicon: 3%, rare earth: 0.6%, magnesium powder: 4%, electrolytic manganese: 9%, aluminium powder: 1.5%, nickel powder: 8%, 1% ferro-boron: 5%, graphite: 0.5%, 63-22 silicomangan: 6%, zircon sand: 0.7%, surplus is Fe and inevitable impurity.
Wherein, carbon steel crust adopts the carbon steel steel band of low S, P, and the chemical constituent of this carbon steel steel band is C:0.048%, Si:0.21%, Mn:0.30%, S:0.006%, P:0.007%, and surplus is iron.
In the present embodiment, in described ferro-boron, the mass fraction of boron is 0.9 ~ 1.8%; Ferrosilicon adopts 75
#ferrosilicon, wherein the mass fraction of silicon is 70 ~ 77%; Silicomangan adopts 63-22 silicomangan, and wherein the mass fraction of silicon is 19 ~ 23%; In ferrotianium, the mass fraction of titanium is 30 ~ 35%.
The preparation method that component in employing the present embodiment prepares flux-cored wire is same as the prior art, and flux-cored wire adopts overlap joint O type sealing mode.
The deposited metal composition test of the flux-cored wire prepared by the present embodiment, result is as shown in table 1.
The deposited metal Mechanics Performance Testing of the flux-cored wire prepared by the present embodiment, result is as shown in table 2.
Diffusible hydrogen test (mercury process) of the flux-cored wire prepared by the present embodiment, result is as shown in table 3.
The cracking resistance of the flux-cored wire prepared by the present embodiment, with CTOD verification experimental verification, CTOD result of the test is as shown in table 4.
In addition, the anti-seawater corrosion ability of the flux-cored wire prepared by the present embodiment, testing result shows, weld metal is suitable with mother metal steel plate anti-seawater corrosion ability.
Embodiment 5:
Present embodiments provide a kind of ocean engineering 460MPa level flux-cored wire, comprise carbon steel crust and medicine core, described carbon steel crust accounts for flux-cored wire gross mass 85%, medicine core accounts for flux-cored wire gross mass 15%, it is as follows that the composition of described medicine core and content account for medicine core gross mass percentage: rutile: 38%, sodium fluoride: 1%, feldspar: 4%, ferrotianium: 5%, 75
#ferrosilicon: 1.7%, rare earth: 0.8%, magnesium powder: 4.5%, electrolytic manganese: 8.5%, aluminium powder: 1.4%, nickel powder: 8.2%, 1% ferro-boron: 5.7%, graphite: 0.5%, 63-22 silicomangan: 4.9%, zircon sand: 0.5%, surplus is Fe and inevitable impurity.
Wherein, carbon steel crust adopts the carbon steel steel band of low S, P, and the chemical constituent of this carbon steel steel band is C:0.048%, Si:0.21%, Mn:0.30%, S:0.006%, P:0.007%, and surplus is iron.
In the present embodiment, in described ferro-boron, the mass fraction of boron is 0.9 ~ 1.8%; Ferrosilicon adopts 75
#ferrosilicon, wherein the mass fraction of silicon is 70 ~ 77%; Silicomangan adopts 63-22 silicomangan, and wherein the mass fraction of silicon is 19 ~ 23%; In ferrotianium, the mass fraction of titanium is 30 ~ 35%.
The preparation method that component in employing the present embodiment prepares flux-cored wire is same as the prior art, and flux-cored wire adopts docking O type sealing mode.
The deposited metal composition test of the flux-cored wire prepared by the present embodiment, result is as shown in table 1.
The deposited metal Mechanics Performance Testing of the flux-cored wire prepared by the present embodiment, result is as shown in table 2.
Diffusible hydrogen test (mercury process) of the flux-cored wire prepared by the present embodiment, result is as shown in table 3.
The cracking resistance of the flux-cored wire prepared by the present embodiment, with CTOD verification experimental verification, CTOD result of the test is as shown in table 4.
In addition, the anti-seawater corrosion ability of the flux-cored wire prepared by the present embodiment, testing result shows, weld metal is suitable with mother metal steel plate anti-seawater corrosion ability.
Meanwhile, choose E81T1-K2C flux-cored wire and do comparative example, the flux-cored wire obtained with above-described embodiment 1, embodiment 2, embodiment 3, embodiment 4 and embodiment 5 contrasts, and its performance test results is as shown in table 1, table 2, table 3 and table 4.
Table 1: flux-cored wire deposited metal composition
| Numbering | C | Si | Mn | S | P | Ni |
| Embodiment 1 | 0.054 | 0.26 | 1.59 | 0.0070 | 0.0090 | 1.25 |
| Embodiment 2 | 0.050 | 0.25 | 1.24 | 0.0065 | 0.0010 | 1.10 |
| Embodiment 3 | 0.048 | 0.27 | 1.21 | 0.0068 | 0.007 | 1.09 |
| Embodiment 4 | 0.057 | 0.29 | 1.65 | 0.0060 | 0.010 | 1.17 |
| Embodiment 5 | 0.063 | 0.32 | 1.43 | 0.0089 | 0.015 | 1.21 |
| Comparative example | 0.039 | 0.20 | 1.17 | 0.015 | 0.02 | 1.15 |
Table 2: flux-cored wire deposited metal mechanical property
| Numbering | Rel/MPa | Rm/MPa | A/％ | KV 2(-40℃)/J |
| Embodiment 1 | 596 | 702 | 25 | 184、173、149 |
| Embodiment 2 | 536 | 631 | 24 | 170、180、168 |
| Embodiment 3 | 530 | 620 | 26 | 165、177、163 |
| Embodiment 4 | 600 | 717 | 24 | 89、97、93 |
| Embodiment 5 | 583 | 692 | 25 | 113、126、104 |
| Comparative example | 519 | 607 | 23 | 75、69、80 |
Table 3: flux-cored wire diffusible hydrogen content is tested
Table 4: flux-cored wire welding point CTOD tests
| Numbering | CTOD value | Result of determination |
| Embodiment 1 | 0.322 | Qualified |
| Embodiment 2 | 0.377 | Qualified |
| Embodiment 3 | 0.350 | Qualified |
| Embodiment 4 | 0.298 | Qualified |
| Embodiment 5 | 0.279 | Qualified |
| Comparative example | 0.150 | Qualified, but be worse than the present invention |
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (10)
1. an ocean engineering 460MPa level flux-cored wire, comprise carbon steel crust and medicine core, it is characterized in that: described carbon steel crust accounts for flux-cored wire gross mass 84 ~ 87%, medicine core accounts for flux-cored wire gross mass 13 ~ 16%, it is as follows that the composition of described medicine core and content account for medicine core gross mass percentage: rutile: 30 ~ 42%, sodium fluoride: 1 ~ 2%, feldspar: 3 ~ 6%, ferrotianium: 3 ~ 5%, ferrosilicon: 1 ~ 3%, rare earth: 0.5 ~ 1%, magnesium powder: 3 ~ 5%, electrolytic manganese: 5 ~ 10%, aluminium powder: 1 ~ 2%, nickel powder: 7 ~ 9%, ferro-boron: 4 ~ 7%, graphite: 0.2 ~ 0.5%, silicomangan: 3 ~ 6%, zircon sand: 0.5 ~ 1%, surplus is Fe and inevitable impurity.
2. ocean engineering 460MPa level flux-cored wire as claimed in claim 1, it is characterized in that: described medicine core accounts for 13% of flux-cored wire gross mass, it is as follows that the composition of medicine core and content account for medicine core gross mass percentage: rutile: 42%, sodium fluoride: 2%, feldspar: 6%, ferrotianium: 5%, ferrosilicon: 3%, rare earth: 1%, magnesium powder: 5%, electrolytic manganese: 10%, aluminium powder: 2%, nickel powder: 9%, ferro-boron: 7%, graphite: 0.5%, silicomangan: 6%, zircon sand: 1%, surplus is Fe and inevitable impurity.
3. ocean engineering 460MPa level flux-cored wire as claimed in claim 1 or 2, it is characterized in that: described carbon steel crust adopts the carbon steel steel band of low S, P, the chemical constituent of this carbon steel steel band is C:0.048%, Si:0.21%, Mn:0.30%, S:0.006%, P:0.007%, surplus is iron.
4. ocean engineering 460MPa level flux-cored wire as claimed in claim 1 or 2, is characterized in that: in the chemical composition of described medicine core, the mass ratio of Ti and B is 10:1.
5. ocean engineering 460MPa level flux-cored wire as claimed in claim 1 or 2, is characterized in that: in described ferro-boron, the mass fraction of boron is 0.9 ~ 1.8%.
6. ocean engineering 460MPa level flux-cored wire as claimed in claim 1 or 2, is characterized in that: described ferrosilicon adopts 75
#ferrosilicon, wherein the mass fraction of silicon is 70 ~ 77%.
7. ocean engineering 460MPa level flux-cored wire as claimed in claim 1 or 2, is characterized in that: described silicomangan adopts 63-22 silicomangan, and wherein the mass fraction of silicon is 19 ~ 23%.
8. ocean engineering 460MPa level flux-cored wire as claimed in claim 1 or 2, is characterized in that: in described ferrotianium, the mass fraction of titanium is 30 ~ 35%.
9. ocean engineering 460MPa level flux-cored wire as claimed in claim 1 or 2, is characterized in that: described flux-cored wire adopts the sealing mode of docking O type or overlap joint O type.
10. the purposes of 460MPa level flux-cored wire of the ocean engineering as described in any one of claim 1 ~ 9, is characterized in that: described flux-cored wire is used for the supporting welding of marine engineering equipment 460Mpa level steel construction.
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| CN106475706A (en) * | 2016-10-26 | 2017-03-08 | 四川大西洋焊接材料股份有限公司 | Exempt from application bridge steel weather-proof flux-cored wire and preparation method thereof |
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| CN106475706B (en) * | 2016-10-26 | 2019-02-19 | 四川大西洋焊接材料股份有限公司 | Exempt from coating bridge steel weather-proof flux-cored wire and preparation method thereof |
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| CN106624449B (en) * | 2017-01-18 | 2020-01-10 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for heat treatment of ocean engineering large and thick plates and preparation method and application thereof |
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| CN106862801A (en) * | 2017-04-28 | 2017-06-20 | 天津市永昌焊丝有限公司 | A kind of full-automatic gas-shielded flux-cored wire of pipe line steel |
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| CN107350659A (en) * | 2017-07-17 | 2017-11-17 | 洛阳双瑞特种合金材料有限公司 | Suitable for the 460MPa levels seamless flux-cored wire and manufacture method of all-position welding |
| CN108044256A (en) * | 2017-12-15 | 2018-05-18 | 武汉铁锚焊接材料股份有限公司 | Nuclear power 20 control chromium steel gas-shielded flux-cored wires and its welding method |
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| CN109530962B (en) * | 2018-11-21 | 2021-03-26 | 武汉铁锚焊接材料股份有限公司 | Flux-cored wire for high-current vertical upward welding and preparation method and application thereof |
| CN109719423A (en) * | 2019-03-11 | 2019-05-07 | 江苏南通瑞舶莱焊业科技有限公司 | A kind of high cracking resistance flux-cored wire |
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| CN112453756A (en) * | 2020-11-19 | 2021-03-09 | 天津大桥金属焊丝有限公司 | High-strength and high-toughness gas-shielded flux-cored wire |
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