CN106964918B - A kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment - Google Patents
A kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment Download PDFInfo
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- CN106964918B CN106964918B CN201710250160.5A CN201710250160A CN106964918B CN 106964918 B CN106964918 B CN 106964918B CN 201710250160 A CN201710250160 A CN 201710250160A CN 106964918 B CN106964918 B CN 106964918B
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- welding
- cored wire
- medicine core
- deepwater environment
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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
- B23K35/3033—Ni as the principal constituent
- B23K35/304—Ni as the principal constituent with Cr as the 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
- 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
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al 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
- B23K35/3601—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
- B23K35/3603—Halide salts
- B23K35/3605—Fluorides
Abstract
The invention belongs to technical field of welding materials, disclose a kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment, including metal sheath and medicine core, metal sheath is rolled by N6 nickel strap, the basic slag system of medicine core is alkaline calcirm-fluoride-aluminium-magnesium slag system, the chemical component (wt.%) of N6 nickel strap are as follows: Ni+Co >=99.5%, Cu≤0.06%, Fe≤0.10%, Mn≤0.05%, C≤0.10%, Si≤0.10%, S≤0.005%, the component and mass fraction of medicine core are as follows: fluoride 52%-67%, Al-Mg alloy powder 14%-20%, calcium carbonate 5-10%, manganese iron 5%-15%, chromium 3%-10%, titanium 4%-10%, rare earth 1.5%-5%, the filling of medicine core in flux-cored wire Rate is 24%-32%.Scheme provided by the invention can be used for the welding of the underwater 100-200 meters of depth of water, easy starting the arc when welding, arc burning is stablized, without blow-out current interruption phenomenon, gained appearance of weld is beautiful, postwelding deposited metal tensile strength is greater than 500MPa, has good impact flexibility, meets the all-position welding of middle low carbon steel and low-alloy high-strength steel under deepwater environment.
Description
Technical field
The invention belongs to technical field of welding materials, and in particular to a kind of all positon underwater wet welding use of deepwater environment
Self-protection flux-cored wire.
Background technique
With the increasing of ocean engineering construction scale, the application of Underwater Welding is also increasingly frequent.For exploitation deep-sea resources
Demand, the construction depth of Underwater Welding is continuously increased, therefore mentions to the welding quality and production efficiency that improve under deepwater environment
Urgent demand is gone out.Underwater wet welding is with self-protection flux-cored wire can be under no drainage arrangement and unprotect atmosphere directly
The welding material for carrying out welding in water is connect, there is when Underwater Welding easy to operate, high efficiency, high quality and can automatic welding
The characteristics of, it can satisfy the welding demand under deepwater environment.But compared with the welding under shallow-water environment, welding is gone back under deepwater environment
There are the following problems: (1) under the action of water pressure, welding arc is shunk seriously, and electric arc is unstable, is easily frequent blow-out phenomenon；(2)
Alloying element scaling loss is serious, the chilling effect of external adding water, and welding point brittleness is very big.Therefore, for the welding under deepwater environment
Feature develops deepwater environment welding flux-cored wire special with independent intellectual property rights, to the welding matter improved under deepwater environment
It measures most important.
Welding process stability is most important when underwater wet welding.CN104874939A describes a kind of high stability water
Lower welding electrodes coating can be no more than 20 meters in the depth of water, and water velocity is not higher than under conditions of 1.2 meter per seconds, is kept smooth
Striking, continued stable combustion, no arc extinction phenomenon, deposited metal tensile strength Rm >=400MPa.But the welding of such welding rod
The depth of water is no more than 20 meters, and the welding under deepwater environment is restricted.
Underwater semi-automatic and Full-automatic welding can be realized using underwater wet process self-protection flux-cored wire, therefore can be applicable in
It is welded under deepwater environment.CN103084761B and CN104057214B describes a kind of underwater wet welding self-shield respectively
Flux-cored wire, used sheath are rolled by mild steel steel band and N6 nickel strap respectively, and when Underwater Welding has the starting the arc and is easy, electric arc
The features such as flameholding, restarting is good, and appearance of weld is good, excellent in mechanical performance.But due to being influenced by hydraulic pressure, deep water ring
Welding can there are great differences under border and shallow-water environment, and both flux-cored wires are without being directed to deepwater environment weld characteristics pair
Drug core component is specially designed, and is not also integrated to the mechanical property etc. of weldability and connector under deepwater environment
Evaluation, therefore not can determine that whether both flux-cored wires adapt to the welding under deepwater environment.
Summary of the invention
In view of the deficiencies of the prior art, the present invention is intended to provide a kind of arcing is stable, work efficiency is high, it is suitable for 100-
The all positon underwater wet welding self-protection flux-cored wire of 200 meters of deepwater environments.The tensile strength of postwelding deposited metal is greater than
500MPa, and there is good impact flexibility, middle low carbon steel and low-alloy high-strength steel can be substantially met under deepwater environment
All-position welding requirement.A variety of arc stabilizers are added in medicine core to guarantee that stablizing for welding arc is burnt under deepwater environment, and led to
The mode for crossing medicine core transition alloy elements into deposited metal improves the mechanical property of deposited metal.In addition to this, by adjusting
The viscosity of slag makes it meet the all-position welding requirement under deepwater environment.
A kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment, including metal sheath and medicine core,
Metal sheath is rolled by N6 nickel strap, and the basic slag system of medicine core is alkaline calcirm-fluoride-aluminium-magnesium slag system, the chemical component of N6 nickel strap
(wt.%) are as follows: Ni+Co >=99.5%, Cu≤0.06%, Fe≤0.10%, Mn≤0.05%, C≤0.10%, Si≤
0.10%, S≤0.005%, the basic slag system of medicine core are alkaline calcirm-fluoride-aluminium-magnesium slag system.In view of the welding under deepwater environment
Feature, in order to guarantee the welding point of welding arc under deepwater environment stablized burning and obtain function admirable, the present invention is internal
Portion's medicine core formula is accordingly designed, and guarantees the steady of welding arc under deepwater environment by adding a variety of arc stabilizers in medicine core
Fixed burning, and the mechanical property of deposited metal by way of transition alloy elements, is improved into deposited metal medicine core.Except this it
Outside, by adjusting the viscosity of slag, it is made to meet the all-position welding requirement under deepwater environment.The component and matter of designed medicine core
Measure score are as follows: fluoride 52%-67%, Al-Mg alloy powder 14%-20%, calcium carbonate 5%-10%, manganese iron 5%-15%, chromium
3%-10%, titanium 4%-10%, rare earth 1.5%-5%.The filling rate of medicine core is 24%-32% in flux-cored wire.
Calcium carbonate primarily serves gas making effect, but calcium carbonate additional amount cannot be too big, and additional amount is generally no more than
10%, it is also easy to produce biggish splashing when otherwise welding, so the additional amount of calcium carbonate is 5%-10% in the present invention；
Manganese iron plays weld seam deoxidation, desulfidation, and can into weld seam transition alloy elements, improve weld seam metallurgical performance,
Ensure the intensity of weld metal.The mass percent that manganese iron is added in the present invention is 5%-15%；
Chromium is added in weld seam as alloying element, forms Ni-Cr solid solution with nickel, and the matrix as weld metal forms
Part has anti-oxidant and erosion-resisting effect, moreover it is possible to mention in addition, chromium is also the main component alloy element in nickel-base alloy
The intensity and impact property of high weld seam.The mass percent that chromium is added in the present invention is 3%-10%；
Deoxidation, denitrogenation and dehydrogenation are played the role of in the addition of titanium, and titanium is carbide, and the TiC generated has
It is very strong to catch Hydrogen Energy power, reduce the diffusible hydrogen content in weld seam.In addition, titanium also easily reacts generation with C, N and O in welding pool
Tiny TiC, TiO and TiN particle, is alternatively arranged as heterogeneous nucleation mass point, plays refinement crystal grain, improves seam organization, and raising connects
The effect of head toughness.The mass percent that titanium is added in the present invention is 4%-10%；
Rare earth metal can significantly improve arc stability, reduce current interruption time and short-circuit number, guarantee in deepwater environment
Under smooth welding.In addition, rare earth metal also has strong deoxidation, denitrogenation and desulfidation, weld seam is purified, it is tough to improve weld seam
Property.The mass percent that rare earth metal is added in the present invention is 1.5%-5%.
Fluoride is with CaF2Based on, add LiF, K2ZrF6And Na2ZrF6, four mass percent is respectively
CaF260%-80%, LiF10%-30%, K2ZrF65%-15%, Na2ZrF65%-15%.Fluoride primarily serves slag making, makes
Gas and shoddye effect.Fluoride ionizes under the high temperature action of welding arc in welding process, the fluorine ion and hydrogen of generation
Ions binding generates the HF gas insoluble in deposited metal, to reduce the diffusible hydrogen content of weld metal.In addition, welding
Fluorochemical portion gasifies in the process, forms air bag, protects welding arc, reduces influence of the water to electric arc.LiF,K2ZrF6With
Na2ZrF6Capacity of decomposition ratio CaF2By force, it is easier to gasify under welding arc effect, therefore is also easier to reduce deposited metal
In hydrogen content, and decomposite come Li, K, Na be alkali metal have stabilising arc effect, it is steady that the electric arc welded under deepwater environment can be improved
Qualitative, Zr also acts as the effect of refinement crystal grain.In addition to this, fluoride also acts as slag making, shoddye effect, adjusts the viscous of slag
Degree.When content of fluoride is excessive, viscosity coefficient of dross is lower, and slag trickling is serious when welding, is unfavorable for all-position welding, downhand welding
When, face of weld exposed metal/bare metal is also resulted in, cannot be played a very good protection.In addition, fluoride additional amount is excessive, can also
Lead to welding arc combustion instability, splashing increases, and welding usability is deteriorated.But when fluoride additional amount is very few, gas making slag making
Deficiency can exist in weld seam and be also easy to produce stomata and the not congruent problem of face of weld slag covering.So fluoride in the present invention
Total additional amount is 52%-67%.
The mass percent of aluminium is 50%-70% in Al-Mg alloy powder, and the mass percent of magnesium is 30%-50%.Aluminium-magnesium
Alloyed powder is strong deoxidier, is reacted in the welding process with oxygen, prevents stomata from generating, at the same reduce in medicine core Si, Mn and
The scaling loss of other alloying elements is conducive to the transition of alloying element, improves appearance of weld, improves weldquality.Aluminium was welding
Oxidation generation aluminium oxide enters slag in journey, mixes with calcirm-fluoride, adjusts the fusing point and viscosity of slag, guarantees slag in weld seam table
The protective effect in face, and meet all position welding features.But when aluminium content is excessive, excessive aluminium oxide is generated, so that slag
Fusing point significantly increases, so that cannot play the role of protecting molten drop, separately compared to medicine core fusing lag inside external metallization band
Outside, slag fusing point is excessively high, and when solidification easily causes weld metal dreg defect.In addition to this, if aluminium additional amount excessively has remnants
When, into weld seam, the toughness of weld seam is caused to reduce.Magnesium reacts under high temperature action generates MgO into people's slag, is conducive to improve molten
The basicity of slag improves the low-temperature flexibility of weld metal.MgO can also improve the conductive capability of slag, improve arc stability, may be used also
Improve the starting the arc and restarting function of flux-cored wire.But content of the magnesia generated in slag should control below 5%.
So total additional amount of Al-Mg alloy powder is 14%-20% in the present invention.
Preferably, the filling rate of medicine core is 24%-32% in flux-cored wire.
Flux-cored wire is made using conventional flux-cored wire technology of preparing.
When technical solution of the present invention carries out Underwater Welding, the easy starting the arc, arc burning is stablized, and restarting is functional, and nothing is put out
Arc current interruption phenomenon can be used for all positon underwater wet welding of the 100-200 meters of depth of waters, and appearance of weld obtained by postwelding is beautiful,
Postwelding deposited metal tensile strength is not less than 500MPa, and has good impact flexibility, can meet middle low carbon steel and low-alloy
All-position welding of the high-strength steel under deepwater environment.
Specific embodiment
Below by specific embodiment, the invention will be further described, but is not limitation of the present invention.
Medicine core powder is prepared according to the above ratio, and the composition content of adjustment medicine core powder prepares 6 kinds of heterogeneities and contain as shown in table 1
The flux-cored wire of amount, the granularity of medicine core powder are 80 mesh.First by each drug core component accurate weighing in proportion, it is then placed in mixed powder machine
Interior mixing is taken out spare after 5 hours.
Preparing flux-cored wire selects N6 nickel strap as flux-cored wire metal sheath, and chemical component is as shown in table 2, nickel strap specification
Are as follows: 0.3mm × 8mm is produced according to common flux-cored wire preparation process, and above-mentioned uniformly mixed medicine core powder is added to
In metal sheath, the flux-cored wire that section is " O " type is prepared, gage of wire is φ 1.6mm, and the filling rate of medicine core is 24%-
32%.
Base material used in embodiment is E40 steel plate, and plate thickness 14mm, soldering test is in the pressure that can simulate the different welding depth of waters
It is carried out in power tank, the welding depth of water is 200 meters, and used welding condition is as shown in table 3, is melted after welding of the embodiment of the present invention
The mechanical property of metallisation is as shown in table 4.
| Serial number | CaF2 | LiF | K2ZrF6 | Na2ZrF6 | Al-Mg alloyed powder | CaCO3 | Mn-Fe | Cr | Ti | Rare earth |
| 1 | 38 | 8 | 4 | 5 | 16 | 7 | 9 | 6 | 5 | 2 |
| 2 | 42 | 7 | 4 | 4 | 15 | 6 | 6 | 6 | 6 | 4 |
| 3 | 46 | 6 | 3 | 4 | 14 | 5 | 7 | 4 | 8 | 3 |
| 4 | 38 | 10 | 5 | 4 | 15 | 6 | 6 | 5 | 5 | 5 |
| 5 | 42 | 10 | 6 | 5 | 18 | 5 | 5 | 3 | 4 | 2 |
| 6 | 45 | 8 | 4 | 4 | 15 | 7 | 5 | 4 | 5 | 3 |
The self-protection flux-cored wire of the present invention of table 1 is with medicine core chemical component (wt.%)
| Ingredient | Ni+Co | Cu | Fe | Mn | C | Si | S |
| Content | ≥99.5 | ≤0.06 | ≤0.10 | ≤0.05 | ≤0.10 | ≤0.10 | ≤0.005 |
2 present invention N6 nickel strap chemical component (wt.%) of table
Welding condition used in 3 embodiment of the present invention of table
4 postwelding deposited metal mechanical property of the embodiment of the present invention of table
Embodiment only illustrates technical solution of the present invention, rather than carries out any restrictions to it；Although with reference to the foregoing embodiments
Invention is explained in detail, for those of ordinary skill in the art, still can be to previous embodiment institute
The technical solution of record is modified or equivalent replacement of some of the technical features；And these modifications or substitutions, and
The essence of corresponding technical solution is not set to be detached from the spirit and scope of claimed technical solution of the invention.
Claims (4)
1. a kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment, including metal sheath and medicine core,
Be characterized in that: metal sheath is rolled by N6 nickel strap, and the basic slag system of medicine core is alkaline calcirm-fluoride-aluminium-magnesium slag system, the change of N6 nickel strap
Learn composition quality percentage are as follows: Ni+Co >=99.5%, Cu≤0.06%, Fe≤0.10%, Mn≤0.05%, C≤0.10%, Si≤
0.10%, S≤0.005%, the component and mass fraction of medicine core are as follows: fluoride 52%-67%, Al-Mg alloy powder 14%-20%, calcium carbonate
5%-10%, manganese iron 5%-15%, chromium 3%-10%, titanium 4%-10%, rare earth 1.5%-5%.
2. a kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment according to claim 1,
It is characterized in that: fluoride CaF2、LiF、K2ZrF6And Na2ZrF6, mass percent CaF260%-80%, LiF10%-30%,
K2ZrF65%-15%, Na2ZrF65%-15%。
3. a kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment according to claim 1,
Be characterized in that: the mass percent of aluminium is 50%-70% in Al-Mg alloy powder, and the mass percent of magnesium is 30%-50%.
4. a kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment according to claim 1,
Be characterized in that: the filling rate of medicine core is 24%-32%.
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| CN201710250160.5A CN106964918B (en) | 2017-04-17 | 2017-04-17 | A kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment |
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| CN201710250160.5A CN106964918B (en) | 2017-04-17 | 2017-04-17 | A kind of all positon underwater wet welding self-protection flux-cored wire of deepwater environment |
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| CN106964918B true CN106964918B (en) | 2019-04-30 |
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Families Citing this family (9)
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| CN108296667B (en) * | 2018-02-12 | 2020-05-29 | 青岛润乾高新科技有限公司 | Flux-cored wire for underwater welding and preparation method |
| CN110340567B (en) * | 2018-04-03 | 2021-04-02 | 青岛润乾高新科技有限公司 | Low-hydrogen flux-cored welding wire suitable for high-strength steel and preparation method thereof |
| CN108515288B (en) * | 2018-05-08 | 2020-10-23 | 山东省科学院海洋仪器仪表研究所 | Welding rod and coating for welding in wading environment and preparation method thereof |
| CN108707895B (en) * | 2018-06-15 | 2020-05-15 | 哈尔滨工程大学 | Composite coating material for underwater laser repairing of copper-based metal and preparation method thereof |
| CN109530959B (en) * | 2018-11-21 | 2021-03-26 | 武汉铁锚焊接材料股份有限公司 | Small-specification self-shielded flux-cored wire suitable for flat welding and transverse welding and application thereof |
| CN110497113B (en) * | 2019-08-23 | 2021-06-01 | 哈尔滨工业大学（威海） | Low-energy-consumption multipurpose underwater wet welding self-protection flux-cored wire |
| CN112719687B (en) * | 2020-12-17 | 2022-06-14 | 中国人民解放军陆军装甲兵学院 | Flux-cored wire for underwater welding |
| CN112743191B (en) * | 2020-12-28 | 2022-10-28 | 哈尔滨工程大学烟台研究院 | Underwater arc additive repair method |
| CN114769932B (en) * | 2022-04-01 | 2023-07-07 | 天津沃盾耐磨材料有限公司 | Nickel-based alloy flux-cored wire and preparation method thereof |
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