CN106944765B - A kind of self-protection flux-cored wire for X80 pipe line steel - Google Patents
A kind of self-protection flux-cored wire for X80 pipe line steel Download PDFInfo
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- CN106944765B CN106944765B CN201710345034.8A CN201710345034A CN106944765B CN 106944765 B CN106944765 B CN 106944765B CN 201710345034 A CN201710345034 A CN 201710345034A CN 106944765 B CN106944765 B CN 106944765B
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- fluoride
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- cored wire
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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
- B23K35/36—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
-
- 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
- B23K35/3608—Titania or titanates
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention provides a kind of self-protection flux-cored wire for X80 pipe line steel; welding wire crust and medicine core including mild-carbon steel strip; it is characterized by: the medicine core medicinal powder formula is according to mass percent by barium fluoride 40%-50%, calcirm-fluoride 10%-20%, lithium fluoride 5%-10%, barium carbonate 2%-5%, cerium fluoride 1%-5%; di-iron trioxide 1%-2%, zirconium oxide 0%-2%, titanium dioxide 0%-4%, magnesium powder 5%-8%, aluminium powder 5-10%, low-carbon ferromanganese 6%-8%, metallic nickel 6%-8%; aluminium zircaloy 5%-10%; quartzy 1%-5%, iron powder 0%-5% composition.Self-protection flux-cored wire of the invention is suitble to pipeline all-position welding, and welding usability is good, and deposited metal has good mechanical performance, and -40 DEG C of v-notch impact absorbing energies of welding wire deposited metal reach 100J or more, meet the requirement of its welding seam toughness.
Description
Technical field
The present invention relates to it is a kind of for metal welding flux-cored wire, it is especially a kind of for X80 pipe line steel welding from
Protect flux-cored wire.
Background technique
With the construction and use of China's oil gas pipeline on a large scale, the requirement to pipe line steel is also increasingly stringenter.
Under the premise of guaranteeing economical, operation the safety and reliability of feed-line construction, pipe line steel itself is not required nothing more than and is had
There is excellent toughness, and requires its mating welding material that there is excellent toughness.Due to the spy of welding process inherently
Property, often make the toughness of Pipeline Welded Joints poor, this just becomes the weak link of feed-line, improves pipe line steel and matches
The toughness of set welding material deposited metal and welding point just becomes one of urgent problem.Self-protection flux-cored wire its
It is mainly characterized by being not necessarily to any protective gas, deposition efficiency height when welding, this makes its suitable field work easy to use, especially
It is suitble to open air site welding.Vast territory and abundant resources in China, with a varied topography, and self-protection flux-cored wire is since its convenience is in " West-east Gas
It is largely used in engineering.
103612033 A of patent CN discloses " high-toughness self-protection flux-cored welding wire of X80 pipe line steel welding ", it is intended to adopt
With fluoride and carbonate gas making, aluminum oxide and aluminum oxide adjust slag fusing point, viscosity and surface tension, cerium oxide
Inclusion size and aluminium powder, almag, manganese metal and metallic nickel are controlled as alloying constituent with lanthana.Its recipe ingredient
More and more complex, process is cumbersome.It has preferable -40 DEG C of notched bar impact strengths, however tensile strength is only full reluctantly
Foot requires.
104043912 B of patent CN discloses " one kind is for pipe line steel welding self-protection flux-cored wire ", invention examination
Figure using alumina silicate and rare earth oxide as slag former, oxalic acid aluminium as gas-forming agent and germanium, manganese, silicon as deoxidier,
Ti, Ni, Al achieve the purpose that self-shield as alloying constituent, and the flue dust generated in the welding process is less, and splash small, electric arc
Stablize.However its low-temperature impact toughness and elongation percentage are lower, -20 DEG C of cold impact values only 60J or so.
101234461 B of patent CN discloses a kind of " self-protecting complete position high tenacity for the welding of X80 level pipeline pipeline
Flux-cored wire ", the invention attempt based on carbonate gas making, and fluoride accounting reduces, and manganese metal and nickel are as alloying constituent, oxidation
Aluminium adjusts Slag Properties, and almag carries out deoxidation.Its deposited metal has preferable tensile strength and ductility, however low temperature
- 30 DEG C of notched bar impact strength only 120J or so.
105345315 A of patent CN discloses a kind of " high Ni self-shield fluxed-cored welding suitable for high-grade pipe welding
Silk ", the patent attempt to improve the purpose that the content of metallic nickel improves deposited metal impact flexibility to 12-25%.Formula group
At predominantly fluoride and electrolytic manganese, nickel powder and metal zirconium.Wherein the usage amount of metal zirconium is 0.1%-0.6%.Its deposition
Metal tensile strength with higher, and -20 DEG C of low-temperature impact toughness values are only 100J or so.
In summary, the main of self-protection flux-cored wire is protected at present with fluoride and carbonate slag making gas making, cooperation with
Strengthening and Toughening alloying component adjusts mechanical property, and oxide adjusts Slag Properties.However the deposited metal of these patent formulation welding wires
There is certain disadvantage in mechanical property.The present invention presently, there are aiming at the problem that, propose a kind of new self-shield medicine core
Solder wire formula can reach preferable low temperature impact properties while meeting intensity.
Summary of the invention
Still guarantee excellent in toughness the purpose of the present invention is to provide a kind of suitable pipeline all-position welding, in low-temperature condition
Self-protection flux-cored wire for X80 pipe line steel.
In view of the problems of the existing technology, the present invention be solve the problems, such as the technical solution adopted is as follows:
A kind of self-protection flux-cored wire for X80 pipe line steel, welding wire crust and medicine core including mild-carbon steel strip, the medicine
Core medicinal powder formula is according to mass percent by barium fluoride 40%-50%, calcirm-fluoride 10%-20%, lithium fluoride 5%-10%, carbonic acid
Barium 2%-5%, cerium fluoride 1%-5%, di-iron trioxide 1%-2%, zirconium oxide 0%-2%, titanium dioxide 0%-4%, magnesium powder
5%-8%, aluminium powder 5-10%, low-carbon ferromanganese 6%-8%, metallic nickel 6%-8%, aluminium zircaloy 5%-10%, quartzy 1%-
5%, iron powder 0%-5% composition.
The medicine core medicinal powder granularity control is in 50-60 mesh.It, could be preferably after medicine core powder particles reach suitable partial size
The rolling speed of powder particles is controlled, and then preferably controls filling rate.
Welding wire medicinal powder filling rate is controlled in 20-21%.To reach suitable gas making self-shield effect, while guaranteeing in metal
The amount of alloy, and then guarantee deposited metal mechanical property, the more or few performance of medicinal powder filling has difference.Under this patent formula
It selects the filling rate that powder is enabled more steadily to play energy protective effect to metal bath, and then guarantees deposited metal
Energy.
The flux-cored wire steel band is H08A carbon steel steel band.
Fluoride, oxide and carbonate in the medicine core need to be granulated by 700 DEG C of baking pretreatments.Due to powder
Grain it is thinner, such powder is easy to unite, wire drawing filling when will sometimes made ground it is more, made ground is few sometimes, so that filling rate
It is unstable.Conventional in the prior art to be granulated using waterglass, this method granulation outcome is bad, will affect the performance of material.Pass through
After 700 DEG C bake, low-melting matter melts of minority in powder get up surrounding unmelted substance bonding, play by
Little particle becomes the effect of bulky grain, so that powder particles partial size becomes larger.
The self-protection flux-cored wire diameter is 2.0mm.
The preparation method of the above-mentioned self-protection flux-cored wire for X80 pipe line steel, comprising the following steps:
Step 1: mild steel steel band being rolled into U-shaped using molding roller, with dust feeder by medicine core powder according to 20-21%
It is filled into U-lag；
Step 2: U-lag being healed up, medicine core is wrapped in wherein, is reduced the diameter using wire-drawing process by road drawing
2.0mm obtains final products.
The main function of each component is as follows in above-mentioned medicine core:
Barium fluoride and calcirm-fluoride: gas making slag making dehydrogenation in the welding process realizes the protection to molten bath, improves all position welding
Connect performance.
Lithium fluoride: arc stability is improved in the welding process.
Barium carbonate；Gas making is improved in the welding process protects molten bath.
Cerium fluoride: arc stability gas making is improved in the welding process and protects molten bath, and inclusion size is effectively reduced, is promoted
Into acicular ferrite nucleating, improve Low Temperature Toughness of Deposited Metals.
Zirconium oxide and titanium dioxide: slag making is mainly played in the welding process, adjusts slag fusing point, viscosity and surface tension
Effect, and improve welding technological properties.
Di-iron trioxide: blow force of arc is improved in the welding process.
Magnesium powder and aluminium powder: the reaction of deoxidation fixed nitrogen occurs in the welding process can eliminate the oxygen nitrogen in air to the wound in molten bath
Evil effectively eliminates stomata and fixed free nitrogen.
Low-carbon ferromanganese: playing deoxidation in the welding process, and is transitioned into deposited metal and improves intensity.
Metallic nickel: deposited metal mechanical property, especially low-temperature impact toughness are improved.
Aluminium zircaloy；Inclusion size is effectively reduced, promotes acicular ferrite nucleating, improves Low Temperature Toughness of Deposited Metals.
Quartz: deoxidation is played in the welding process, and can improve metal bath mobility.
Iron powder: it is added as medicine core component surplus.
The utility model has the advantages that compared with prior art, the present invention has the following technical effect that
1, the usage amount for improving fluoride, in the range of 55-85%, by barium fluoride, calcirm-fluoride, lithium fluoride, cerium fluoride,
Barium carbonate, zirconium oxide, titanium dioxide, the rational allocation of magnesium powder, aluminium powder, low-carbon ferromanganese, aluminium zircaloy and quartz etc., improve weldering
The ability of silk self-shield, avoids stomata.
2, due to cerium fluoride, the addition of magnesium powder, aluminium powder, low-carbon ferromanganese and a small amount of aluminium zircaloy, so that deposited metal tissue
The increasing proportion of middle acicular ferrite improves the low-temperature impact toughness of deposited metal, -40 DEG C of v-notch of welding wire deposited metal
Impact absorbing energy reaches 100J or more.Meet the requirement of welding seam toughness.
3, due to the addition of zirconium oxide and titanium dioxide, so that welding wire welding technological properties is good, weldering is especially improved
The removability of slag energy of slag is connect, appearance of weld is beautiful.
4, by 700 DEG C of powder baking process of innovation, filling capacity is improved, so that welding wire filling is uniform.
Specific embodiment
Below by embodiment, the technical solutions of the present invention will be further described: one kind being used for X80 pipe line steel
All-position welding high-toughness self-protection flux-cored welding wire uses commercially available common H08A steel band for welding wire crust, using alloy transition side
Formula is made using general flux-cored wire production technology.
Table 1 is the medicine core powder chemical constituent of self-protection flux-cored wire in each embodiment
The test piece for welding of the Deposited Metal of Self-shielded Flux mechanical property of embodiment 1,2 and 3 prepares as follows: test plate (panel)
It is prepared referring to AWS A5.29/A5.29M, test plate (panel) selects Q235 steel plate 250mm × 250mm × 20mm, and it is 9mm that backing plate, which is selected,
Q235 steel plate.Test plate (panel) groove is V-arrangement, and bevel angle is 45 °.
Embodiment 1,2 and the welding conditions of 3 self-protection flux-cored wires are as follows: weldingvoltage 24.5V, welding current 220-
250A, using DCEN DC reverse connection, 150 DEG C of weld preheating, interlayer temperature is less than 150 DEG C, and for postwelding without heat treatment, welding wire is straight
Diameter is 2.0mm.
After the completion of embodiment 1,2 and 3 is welded, microstructure observation is carried out to deposited metal, test result is as follows, deposition gold
Belonging to tissue is acicular ferrite and granular ferrite and a small amount of pearlite and bainite.Deposited metal mechanical performance such as table 2
Shown, deposited metal tensile strength and elongation percentage reach requirement, and -40 DEG C of low-temperature impact toughness are greater than 100J.Test result table
It is bright: using self-protection flux-cored wire described in inventive formulation, after being invented the specification welding, deposited metal mechanics
Performance meets the intensity requirement of X80 steel, and has -40 DEG C of very excellent impact flexibility.
Table 2 is each embodiment Deposited Metal of Self-shielded Flux mechanical property
In actual welding operation, self-protection flux-cored wire of the present invention, slag has suitable viscosity and coagulating property, takes off
Slag is good, splashes small, can all-position welding；And welding usability is good, arc stability operation is easy, and appearance of weld is beautiful.According to upper
Experimental data is stated it is found that its deposited metal low temperature with higher (- 40 DEG C) impact flexibility.The setting temperature of slag, surface
Power suitably may make molten drop injection excessive.The transition alloy elements of appropriate amount, it is ensured that weld metal has excellent intensity
With higher low-temperature impact toughness.
Protection scope of the present invention is not limited to the above embodiments, it is clear that those skilled in the art can be to this hair
It is bright to carry out various changes and deformation without departing from scope and spirit of the present invention.If these changes and deformation belong to power of the present invention
In the range of benefit requirement and its equivalent technologies, then including the intent of the present invention also includes these changes and deforms.
Claims (5)
1. a kind of self-protection flux-cored wire for X80 pipe line steel, welding wire crust and medicine core, feature including mild-carbon steel strip exist
In: the medicine core medicinal powder formula is according to mass percent by barium fluoride 40%-50%, calcirm-fluoride 10%-20%, lithium fluoride 5%-
10%, barium carbonate 2%-5%, cerium fluoride 1%-5%, di-iron trioxide 1%-2%, zirconium oxide 0%-2%, titanium dioxide 0%-
4%, magnesium powder 5%-8%, aluminium powder 5-10%, low-carbon ferromanganese 6%-8%, metallic nickel 6%-8%, aluminium zircaloy 5%-10%, stone
English 1%-5%, iron powder 0%-5% composition.
2. a kind of self-protection flux-cored wire for X80 pipe line steel as described in claim 1, it is characterised in that: the medicine core
Medicinal powder granularity is controlled in 50-60 mesh.
3. a kind of self-protection flux-cored wire for X80 pipe line steel as described in claim 1, it is characterised in that: welding wire medicinal powder
Filling rate is controlled in 20-21%.
4. a kind of self-protection flux-cored wire for X80 pipe line steel as described in claim 1, it is characterised in that: the medicine core
In fluoride, oxide and carbonate need to be by 700 DEG C of baking pretreatment granulation.
5. a kind of self-protection flux-cored wire for X80 pipe line steel as described in claim 1, it is characterised in that: the self-insurance
Shield flux-cored wire diameter is 2.0mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710345034.8A CN106944765B (en) | 2017-05-16 | 2017-05-16 | A kind of self-protection flux-cored wire for X80 pipe line steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710345034.8A CN106944765B (en) | 2017-05-16 | 2017-05-16 | A kind of self-protection flux-cored wire for X80 pipe line steel |
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| CN106944765A CN106944765A (en) | 2017-07-14 |
| CN106944765B true CN106944765B (en) | 2019-04-26 |
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| 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 |
| CN109530960B (en) * | 2018-11-21 | 2021-03-26 | 武汉铁锚焊接材料股份有限公司 | Small-specification self-protection flux-cored wire suitable for all-position welding and application thereof |
| CN109719424A (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 anti-stomata self-protection flux-cored wire |
| CN109719428A (en) * | 2019-03-12 | 2019-05-07 | 江苏南通瑞舶莱焊业科技有限公司 | The resistance to stomata steel of resistance to preliminary larquering flux-cored wire |
| CN111745325B (en) * | 2020-06-30 | 2022-04-22 | 武汉铁锚焊接材料股份有限公司 | Self-protection flux-cored wire for X70 pipeline steel |
| CN111805121A (en) * | 2020-08-26 | 2020-10-23 | 武汉科技大学 | Flux core for X70 pipeline steel, self-protection flux-cored wire and preparation method thereof |
| CN112222682B (en) * | 2020-09-07 | 2022-03-29 | 南京工程学院 | High-fluorine-alkali type powder, preparation method and self-shielded flux-cored wire |
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| CN112975193B (en) * | 2021-02-09 | 2023-03-17 | 天津市金桥焊材集团股份有限公司 | High-toughness alkaline flux-cored wire slag system with excellent all-position weldability and flux-cored wire |
| CN113579548B (en) * | 2021-07-07 | 2023-07-28 | 四川大西洋焊接材料股份有限公司 | Welding rod, preparation method and application thereof and deposited metal |
| CN115922142A (en) * | 2022-12-07 | 2023-04-07 | 山东聚力焊接材料有限公司 | Self-protection flux-cored wire and preparation method thereof |
| CN115922151A (en) * | 2022-12-09 | 2023-04-07 | 四川大西洋焊接材料股份有限公司 | Coating of welding rod for reactor internals of nuclear power plant, welding rod and preparation method |
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