CN104308391A - Flux-cored wire for corrosion-resistant steel - Google Patents

Flux-cored wire for corrosion-resistant steel Download PDF

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Publication number
CN104308391A
CN104308391A CN201410583710.1A CN201410583710A CN104308391A CN 104308391 A CN104308391 A CN 104308391A CN 201410583710 A CN201410583710 A CN 201410583710A CN 104308391 A CN104308391 A CN 104308391A
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China
Prior art keywords
flux
corrosion
cored wire
mass percentage
low
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CN201410583710.1A
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Chinese (zh)
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CN104308391B (en
Inventor
张亚平
刘玉双
吕奎清
田海成
李磊
韩海峰
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Wuhan Tiemiao Welding Materials Co Ltd
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Wuhan Tiemiao Welding Materials Co Ltd
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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
    • B23K35/3073—Fe as the principal constituent with Mn as next major 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
    • B23K35/02—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
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/02—Iron or ferrous alloys
    • B23K2103/04—Steel or steel alloys

Abstract

The invention discloses a flux-cored wire for corrosion-resistant steel. The flux-cored wire comprises outer skin and a flux core, and the flux core is composed of, by mass percentage, 35-45% of TiO2, 0.5-3.0% of one or two of NaF and CaF2, 4-11% of SiO2, 3-6% of titanium iron alloy, 1-3% of silicon iron alloy, 0.15-0.44% of rare earth fluoride or rare earth oxide, 3-7% of Mg, 12-16% of Mn, 0.3-0.7% of Mo, 0.5-1.5% of Fe3O4, 2-5% of Ni, 4-8% of boron iron, 0.5-2% of Cu and the rest iron powder. By controlling the flux-cored wire on several aspects like chemical composition, diffusible hydrogen and low-temperature stability, requirements on corrosion resistance, crack resistance and low-temperature impact resistance of a welding seam are met, the flux-cored wire is high in all-position welding process performance, attractive in welding seam and excellent in mechanical performance, has corrosion resistance and is suitable for welding of the corrosion-resistant steel serving in hydrogen sulfide corrosion and seawater corrosion environment, and deposited metal diffusible hydrogen content reaches an ultralow-hydrogen level.

Description

A kind of corrosion-resisting steel flux-cored wire
Technical field
The present invention relates to a kind of corrosion-resisting steel flux-cored wire, especially a kind of flux-cored wire being applicable to the corrosion-resisting steel welding hydrogen sulfide corrosion and corrosive environment of sea water military service.
Background technology
Along with the development of national economy, the demand of China to the energy is increasing, and due to climbing to a higher point rapidly of International Crude Oil and falling sharply rapidly of On shore Oil Development, offshore and gas development has become the energy development focus of countries in the world.Country, while a large amount of manpower financial capacity of input carries out marine settings system development, for oil-gas transportation steel, it is also proposed higher requirement.
Existing hydrogen sulfide corrosion in oil gas transport, has seawater corrosion again, therefore requires that steel plate has good hydrogen sulfide corrosion resistant ability, have good anti-seawater corrosion ability simultaneously.Flux-cored wire is as a kind of important welding material of Plate Welding, in the process that supporting corrosion-resisting steel welds, require that its weld metal not only has the feature of high strength, high tenacity, and there is good hydrogen sulfide corrosion resistant and the ability of seawater corrosion resistance, therefore, develop a kind of not only hydrogen sulfide corrosion resistant but also the flux-cored wire of seawater corrosion resistance, for the oil gas construction of promotion China, there is important effect, in currently available technology, also do not meet the flux-cored wire of above-mentioned requirements completely.
Summary of the invention
In order to solve the aforementioned problems in the prior, the invention provides a kind of corrosion-resisting steel flux-cored wire, be applicable to the corrosion-resisting steel welding hydrogen sulfide corrosion and corrosive environment of sea water military service.
Corrosion-resisting steel flux-cored wire provided by the invention, comprises crust and medicine core, and the composition of medicine core and mass percentage thereof are: TiO 235 ~ 45%; NaF and CaF 2in one or both 0.5 ~ 3.0%; SiO 24 ~ 11%; Ferro-titanium 3 ~ 6%; Antaciron 1 ~ 3%; Rare earth fluoride or rare earth oxide 0.15 ~ 0.44%; Mg 3 ~ 7%; Mn 12 ~ 16%; Mo 0.3 ~ 0.7%; Fe 3o 40.5 ~ 1.5%; Ni 2 ~ 5%; Ferro-boron 4 ~ 8%; Cu 0.5 ~ 2%; Surplus is iron powder.Inevitable impurity component is also comprised in medicine core.
Above-mentioned flux-cored wire, adopts the mode of Mn-Mg-Si-Ti combined deoxidation, reduces the oxygen content in weld seam as far as possible.In slag making component, add stabilising arc material, to meet the requirement of operative weldability energy.By adding micro-corrosion resisting alloy element, realizing the decay resistance of weld seam, making this flux-cored wire in mechanical property, corrosion resistance reaches good mating with mother metal.
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 2when measuring very little, above-mentioned feature is not obvious; As TiO in medicine core 2when measuring too much, not only destroy the spreadability of slag, and harmful effect is produced to mechanical property.Therefore, TiO 2the percentage accounting for described medicine core powder gross mass is 35 ~ 45%.
SiO 2also be the main component of slag.SiO 2slag 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 are increased, makes slag have good spreadability.As SiO in medicine core 2addition can not embody above-mentioned feature, SiO time few 2when addition is large, in weld seam, oxygen content raises, and reduces the low-temperature impact toughness of weld metal.Therefore, SiO 2the percentage accounting for described medicine core powder gross mass is 4 ~ 11%.
NaF or CaF 2or the mixture of the two any ratio can dehydrogenation, when addition is large, arc stability is bad, increases spatter and flue dust, and pore load mould, easily appears in the few dehydrogenation scarce capacity of addition.Therefore, NaF or CaF 2or the percentage that the two mixture accounts for described medicine core powder gross mass is 0.5 ~ 3%.
Fe 3o 4can slag be diluted, cause suitable slag surface tension force and viscosity, improve the wellability of slag and molten iron.Add Fe 3o 4when amount is greater than 1.5%, slag surface tension force is too small, and slag can not hold molten iron, vertical position welding difficulty.Therefore, Fe 3o 4the percentage accounting for described medicine core powder gross mass is 0.5 ~ 1.5%.
Ni adds as anticorrosive element, and Ni is favourable to raising low-temperature impact toughness simultaneously.But Ni too high levels then can increase hot tearing sensitiveness.Therefore, Ni accounts for the percentage of described medicine core powder gross mass is 2 ~ 5%.
Mn is main deoxidier, reduces the oxygen content of weld metal, increases weld metal intensity and crack resistance, improves low-temperature impact toughness, regulates molten iron flow.Add weld strength when Mn amount is greater than 16% too high, low-temperature impact toughness reduces.Therefore Mn accounts for the percentage of described medicine core powder gross mass is 12 ~ 16%.
Mg is strong deoxidier, improves low-temperature impact toughness, improves low-temperature impact toughness scarce capacity when addition is less than 3%, add Mg amount when being greater than 7%, 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 mass is 3 ~ 7%.
In ferro-titanium, the mass percent of Ti is 25.0 ~ 35.0%, adds as main deoxidier, the Ti of transition simultaneously element, crystal grain thinning.
In Antaciron, the mass percent of Si is 43 ~ 47%, adds as deoxidier, with Ti, Mn combined deoxidation.
Ferro-boron adds as deoxidier, and the B element of transition simultaneously, coordinates crystal grain thinning with Ti.Wherein preferred W100B ferro-boron, in W100B ferro-boron, the mass percent of boron is 0.9 ~ 1.5%.
Iron powder, can improve conditions at the arc, and regulate molten iron fusing point and viscosity, surplus adds.
Cu is a kind of important corrosion resistance element, can improve weld metal intensity simultaneously.Low-temperature impact toughness can be caused to decline because intensity is too high when content is too much, also can increase the sensitiveness producing fire check.Therefore, Cu accounts for the percentage of described medicine core powder gross mass is 0.5 ~ 2%.
Molybdenum, Mo is improved the effect of intensity, simultaneously can crystal grain thinning, can improve low-temperature impact toughness in certain scope.When content is too much, intensity increases too much, can increase weld metal Sensitivity of Stress Corrosion.Content of the present invention controls at 0.3 ~ 0.7% (percentage of quality).
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.The present invention removes impurity element by the method for chemical metallurgy, separately adopts the raw material that S, P content is low.
Preferably, the sulphur mass percentage of described iron powder is lower than 0.008%, and phosphorus mass percentage is lower than 0.008%.Add the iron powder that S, P content is low, be more conducive to improve its deposition efficiency.
Preferably, described crust is carbon steel steel band, and its sulphur mass percentage is lower than 0.009%, and phosphorus mass percentage is lower than 0.01%.
Preferably, described ferro-boron is W100B ferro-boron.
Preferably, the mass percentage that described crust accounts for flux-cored wire is 80 ~ 87%, and the mass percentage that medicine core accounts for flux-cored wire is 13 ~ 20%.
Preferably, after crust parcel medicine core, the sealing mode sealing of docking O type or overlap joint O type is adopted.
Compared with prior art, the invention has the beneficial effects as follows:
(1) the present invention adopts rutile type slag, welding arc stablility, and slag fluidity is good, and appearance of weld is attractive in appearance, and all positon operating procedure is good.Weld metal stable mechanical property, crack resistance are good.
(2) require to detect according to the hic resistance of NACE TM 0284-2003 standard-required, crack-sensitivity rate (CSR)≤2%, crack length rate (CLR)≤15%, crack thickness rate (CTR)≤5%; Tension test is carried out according to NACE TM 0177-2005 standard A method standard, test uses purity nitrogen, hydrogen sulfide gas, adopt and analyze pure chemistry agent, solution is made up of the glacial acetic acid of the sodium chloride and 0.5% that are dissolved in 5.0% in distilled water, test carries out 720h according to standard, loading ratio is 90% SMYS of material, and sample produces without any cracking and crackle; Corrosion resistance test is carried out according to " CCS crude oil tanker oil cargo tank corrosion-resistant steel inspection guide " Welded Joints, the test of wherein simulating upper deck working condition carries out 98 days, in simulation, 168h is carried out in the test of end working condition, without noncontinuous surface (as stepped) between mother metal and weld metal, meet anti-corrosion requirement.
(3) adopt the carbon steel steel band of low S, P, improve the low-temperature flexibility of flux-cored wire, anti-cold cracking ability and decay resistance.
(4) adopt the Fe powder of low S, P, improve the low-temperature flexibility of flux-cored wire, anti-cold cracking ability and decay resistance.
(5) flux-cored wire deposited metal-40 DEG C of KV in the present invention 2average > 100J.
(6) flux-cored wire of the present invention strictly controls component of weld wire, the basis of low C, low Si is added micro-corrosion resistant alloying element, strictly control the content of impurity element S, P simultaneously, ensureing that weld metal has on the basis of some strength and low-temperature impact toughness, there is good corrosion resistance.Add the composition of crystal grain thinning, purification crystal boundary in flux-cored wire, control cleanliness factor and the microstructure of weld seam, realize the allowance of weld seam low-temperature impact toughness, guarantee that Welding Structure is safe and reliable.Ensure certain Ni content, and add appropriate Ti, B, Mo, ensure that weld metal crystal grain is tiny, thus obtain stable high tenacity weld seam.Utilize Mn-Mg-Si-Ti combined deoxidation, add rare earth element, reduce the content of O and S, P, ensure low-temperature flexibility.Adopt rutile type slag, coordinate 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.Add the corrosion resisting alloy element of trace in welding wire, meet the decay resistance of welding wire.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, and to make those skilled in the art the present invention may be better understood and can be implemented, but illustrated embodiment is not as a limitation of the invention.
Experimental example 1
Corrosion resisting steel flux-cored wire adopts the carbon steel steel band of low S, P, and its chemical composition and content account for steel band quality % in table 1.
Table 1 steel band chemical composition mass percentage (%) (example)
C Si Mn S P
0.071 0.11 0.42 0.004 0.005
Flux-cored wire adopts the iron powder of low S, P, and its chemical composition and content account for iron powder quality % in table 2.
Table 2 iron powder chemical composition mass percentage (%) (example)
C Si Mn S P
0.0036 0.0066 0.088 0.0046 0.0045
Table 3
Note: in embodiment 1, ferro-boron is W100B ferro-boron.
The deposited metal composition test of the flux-cored wire prepared by embodiment 1-6, result is as table 4.
Table 4 deposited metal composition mass percentage (%)
Numbering C Si Mn S P Ni Cu Mo
Embodiment 1 0.043 0.23 0.9 0.0074 0.0091 0.5 0.26 0.11
Embodiment 2 0.03 0.26 1.07 0.0055 0.0090 0.46 0.27 0.095
Embodiment 3 0.024 0.27 1.17 0.0055 0.011 0.47 0.24 0.11
Embodiment 4 0.041 0.23 1.21 0.0077 0.0083 0.45 0.26 0.13
Embodiment 5 0.044 0.25 1.17 0.0072 0.0088 0.45 0.28 0.089
Embodiment 6 0.042 0.22 1.06 0.0068 0.010 0.39 0.25 0.099
The deposited metal Mechanics Performance Testing of the flux-cored wire prepared by embodiment 1-6, result is as table 5.
Table 5 deposited metal mechanical property
The flat banjo fixing butt jointing Mechanics Performance Testing of the flux-cored wire prepared by embodiment 1-6, result is as table 6.
The flat banjo fixing butt jointing mechanical property of table 6
The vertical banjo fixing butt jointing Mechanics Performance Testing of the flux-cored wire prepared by embodiment 1-6, result is as table 7.
Table 7 founds banjo fixing butt jointing mechanical property
Deposited metal diffusible hydrogen test (mercury process) of the flux-cored wire prepared by embodiment 1-6, test result is as table 8
Table 8 deposited metal diffusible hydrogen content (mercury process)
The banjo fixing butt jointing decay resistance of the flux-cored wire prepared by embodiment 1-6.The test of wherein simulating upper deck working condition carries out 98 days, and in simulation, 168h is carried out in the test of end working condition.
The corrosion resistance test of table 9 welding point
Require that carrying out test prepares and carry out hic resistance detection according to NACE TM 0284, result of the test is in table 10.
Table 10 welding point Properties of HIC resistance detects
The flux-cored wire adopting embodiment 1 ~ 6 to prepare is welded test plate (panel), SSC testing inspection is carried out according to NACE TM 0177-2005 standard, test adopts A method to carry out tension test, test uses purity nitrogen, hydrogen sulfide gas, adopt and analyze pure chemistry agent, solution is made up of the glacial acetic acid of the sodium chloride and 0.5% that are dissolved in 5.0% in distilled water, tests and carries out 720h according to standard, loading ratio is 90% SMYS of material, and result of the test is in table 11.
Table 11 welding point SSC testing inspection
? Load Soak time Disconnected no Evaluation
Embodiment 1 90％ReL 720h No Pass through
Embodiment 2 90％ReL 720h No Pass through
Embodiment 3 90％ReL 720h No Pass through
Embodiment 4 90％ReL 720h No Pass through
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.

Claims (6)

1. a corrosion-resisting steel flux-cored wire, comprises crust and medicine core, it is characterized in that, the composition of medicine core and mass percentage thereof are: TiO 235 ~ 45%; NaF and CaF 2in one or both 0.5 ~ 3.0%; SiO 24 ~ 11%; Ferro-titanium 3 ~ 6%; Antaciron 1 ~ 3%; Rare earth fluoride or rare earth oxide 0.15 ~ 0.44%; Mg 3 ~ 7%; Mn 12 ~ 16%; Mo 0.3 ~ 0.7%; Fe 3o 40.5 ~ 1.5%; Ni2 ~ 5%; Ferro-boron 4 ~ 8%; Cu 0.5 ~ 2%; Surplus is iron powder.
2. corrosion-resisting steel flux-cored wire according to claim 1, is characterized in that, the sulphur mass percentage of described iron powder is lower than 0.008%, and phosphorus mass percentage is lower than 0.008%.
3. corrosion-resisting steel flux-cored wire according to claim 1, is characterized in that, described crust is carbon steel steel band, and its sulphur mass percentage is lower than 0.009%, and phosphorus mass percentage is lower than 0.01%.
4. corrosion-resisting steel flux-cored wire according to claim 1, is characterized in that, described ferro-boron is W100B ferro-boron.
5., according to the arbitrary described corrosion-resisting steel flux-cored wire of Claims 1 to 4, it is characterized in that, the mass percentage that described crust accounts for flux-cored wire is 80 ~ 87%, and the mass percentage that medicine core accounts for flux-cored wire is 13 ~ 20%.
6. according to the arbitrary described corrosion-resisting steel flux-cored wire of Claims 1 to 4, it is characterized in that, after crust parcel medicine core, adopt the sealing mode sealing of docking O type or overlap joint O type.
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104741834A (en) * 2015-03-06 2015-07-01 西安理工大学 Flux-cored wire for welding X90 pipeline steel and preparing method thereof
CN105397342A (en) * 2015-12-18 2016-03-16 天津宝庆峰焊业有限公司 Gas shielded flux-cored wire, preparation method thereof and gas shielded welding method
CN106624445A (en) * 2016-12-14 2017-05-10 安徽华众焊业有限公司 Flux-cored wire for corrosion-resistant steel
CN107052617A (en) * 2017-03-20 2017-08-18 武汉铁锚焊接材料股份有限公司 A kind of 1000MPa grade high-strengths all positon ultralow-hydrogen low flux-cored wire and its welding method
CN107252992A (en) * 2017-05-09 2017-10-17 安徽飞弧焊业股份有限公司 A kind of pipe line steel self-protection flux-cored wire
CN107252996A (en) * 2017-06-23 2017-10-17 天津市永昌焊丝有限公司 A kind of marine atmosphere corrosion-resisting steel titania type gas-shielded flux-cored wire
CN107283084A (en) * 2017-06-23 2017-10-24 天津市永昌焊丝有限公司 A kind of marine atmosphere corrosion-resisting steel submerged arc flux-cored wire
CN108406159A (en) * 2018-01-18 2018-08-17 洛阳双瑞特种合金材料有限公司 A kind of high tenacity titanium alkaline seamless flux-cored wire suitable for all-position welding
CN108788533A (en) * 2018-07-09 2018-11-13 天津市永昌焊丝有限公司 A kind of 50 feather weight marine atmosphere corrosion-resisting steel titania type gas-shielded flux-cored wires
CN109894767A (en) * 2019-04-29 2019-06-18 江苏九洲新材料科技有限公司 A kind of ilmenite type E308 flux-cored wire
CN110202291A (en) * 2019-05-29 2019-09-06 武汉铁锚焊接材料股份有限公司 50 kg all-position welding weathering steel flux-cored wires of one kind and its application
CN110202290A (en) * 2019-05-29 2019-09-06 武汉铁锚焊接材料股份有限公司 A kind of high-strength weathering steel flux-cored wire and its application

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* Cited by examiner, † Cited by third party
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CN104741834A (en) * 2015-03-06 2015-07-01 西安理工大学 Flux-cored wire for welding X90 pipeline steel and preparing method thereof
CN105397342A (en) * 2015-12-18 2016-03-16 天津宝庆峰焊业有限公司 Gas shielded flux-cored wire, preparation method thereof and gas shielded welding method
CN106624445A (en) * 2016-12-14 2017-05-10 安徽华众焊业有限公司 Flux-cored wire for corrosion-resistant steel
CN107052617A (en) * 2017-03-20 2017-08-18 武汉铁锚焊接材料股份有限公司 A kind of 1000MPa grade high-strengths all positon ultralow-hydrogen low flux-cored wire and its welding method
CN107052617B (en) * 2017-03-20 2019-08-16 武汉铁锚焊接材料股份有限公司 A kind of 1000MPa grade high-strength all positon ultralow-hydrogen low flux-cored wire and its welding method
CN107252992A (en) * 2017-05-09 2017-10-17 安徽飞弧焊业股份有限公司 A kind of pipe line steel self-protection flux-cored wire
CN107283084B (en) * 2017-06-23 2019-09-20 天津市永昌焊丝有限公司 A kind of marine atmosphere corrosion-resisting steel submerged arc flux-cored wire
CN107252996A (en) * 2017-06-23 2017-10-17 天津市永昌焊丝有限公司 A kind of marine atmosphere corrosion-resisting steel titania type gas-shielded flux-cored wire
CN107283084A (en) * 2017-06-23 2017-10-24 天津市永昌焊丝有限公司 A kind of marine atmosphere corrosion-resisting steel submerged arc flux-cored wire
CN107252996B (en) * 2017-06-23 2020-02-21 天津市永昌焊丝有限公司 Titanium type gas shielded flux-cored wire for marine atmospheric corrosion resistant steel
CN108406159A (en) * 2018-01-18 2018-08-17 洛阳双瑞特种合金材料有限公司 A kind of high tenacity titanium alkaline seamless flux-cored wire suitable for all-position welding
CN108406159B (en) * 2018-01-18 2020-06-30 洛阳双瑞特种合金材料有限公司 High-toughness titanium-alkali seamless flux-cored wire suitable for all-position welding
CN108788533A (en) * 2018-07-09 2018-11-13 天津市永昌焊丝有限公司 A kind of 50 feather weight marine atmosphere corrosion-resisting steel titania type gas-shielded flux-cored wires
CN109894767A (en) * 2019-04-29 2019-06-18 江苏九洲新材料科技有限公司 A kind of ilmenite type E308 flux-cored wire
CN110202290A (en) * 2019-05-29 2019-09-06 武汉铁锚焊接材料股份有限公司 A kind of high-strength weathering steel flux-cored wire and its application
CN110202291A (en) * 2019-05-29 2019-09-06 武汉铁锚焊接材料股份有限公司 50 kg all-position welding weathering steel flux-cored wires of one kind and its application

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