CN106141484B - A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding and preparation method thereof - Google Patents
A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding and preparation method thereof Download PDFInfo
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- CN106141484B CN106141484B CN201610612201.6A CN201610612201A CN106141484B CN 106141484 B CN106141484 B CN 106141484B CN 201610612201 A CN201610612201 A CN 201610612201A CN 106141484 B CN106141484 B CN 106141484B
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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
- B23K35/308—Fe as the principal constituent with Cr as next major constituent
- B23K35/3086—Fe as the principal constituent with Cr as next major constituent containing Ni or Mn
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
- B23K35/0266—Rods, electrodes, wires flux-cored
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—Selection of non-metallic compositions of core materials either alone or conjoint with selection of soldering or welding materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
Abstract
The present invention discloses a kind of very high content vanadium and is modified self-protecting flux-cored wire for overlaying welding and preparation method thereof, and using mild-carbon steel strip as crust, drug core component is by mass percentage：The medicine core includes the component of following mass percentage：The high carbon ferro-chrome of 52~58wt%, the vanadium iron of 28~36wt%, the graphite of 1~2wt%, the almag of 1~4wt%, the silicomangan of 3~9wt%, surplus are iron powder, wherein, graphite, almag and silicomangan are added respectively at least two different grain sizes.Welding wire provided by the invention, by adding varigrained medicine core component, it ensure that good welding technological properties, and by adding in suitable V in medicine core, promote rich chromium cast iron is hypereutectic to organize to change to hypoeutectic, overlay cladding toughness is obviously improved, hardness is high, and wearability is splendid, and welding technological properties is good, deposition efficiency is high, and multilayer welding is without scarfing cinder.
Description
Technical field
The invention belongs to the welding fields in Materials Processing Engineering, are modified built-up welding more particularly to a kind of very high content vanadium and use
Self-protection flux-cored wire and preparation method thereof.
Background technology
Built-up welding is widely used in the reparation of all kinds of wear parts or remanufactures as a kind of green manufacturing technique.Due into
This is cheap in addition convenient for preparing, with Cr7C3Type carbide is used widely for the rich chromium cast iron hardfacing alloy of wear-resisting skeleton.It is high
Coarse Cr in the hypereutectic tissue of chrome cast iron hardfacing alloy7C3On the one hand type carbide has benifit, separately more for improving wearability
On the one hand metallurgical imperfection and micro-crack itself are susceptible to, brittleness is very big, becomes hardfacing alloy and is developed into during being on active service
For the macroscopic cracking even major reason of cracking destruction.Therefore, overcome lacking for traditional high-chromium cast iron-type hardfacing alloy crack resistance difference
It falls into, is a hot subject for developing technique for overlaying in recent years.
Generally use reduces the method for C and alloying element content so that high-chromium cast iron-type hardfacing alloy is by hypereutectic tissue
Change to hypoeutectic structure, to obtain enough toughness；However it reduces C and alloying element content to also result in hardfacing alloy hard
Degree is decreased obviously, and wearability can not also be ensured.
V is usually added into rich chromium cast iron hardfacing alloy, using V and carbon preferentially form wearability more vanadium carbide come
Improve hardfacing alloy wearability.Such as patent document 1 (CN101837522B, vanadium-reinforced wear-resistant submerged-arc surfacing flux-cored welding wire), powder
Medicine core includes high carbon ferro-chrome, deoxidier, iron powder and vanadium iron, and the wherein addition content of vanadium iron is 8-20%；Patent document 2
(CN105127614A, a kind of grinding roll overlaying is without slag self-protection flux-cored wire) then adds in Fe-Cr-C-Ti-V-P alloy systems
Trace alloying element advanced optimizes the performance of flux-cored wire, and the wherein additive amount of vanadium iron is 4~6%, is formed in overlay cladding
It is in granular form the carbide and nitride of equally distributed V；Patent document 3 (CN103182613A, a kind of impact resistance thin footpath self-insurance
Shield flux-cored wire) a kind of medicine core component for adding high-content vanadium iron is disclosed, including：High carbon ferro-chrome：10~50%, molybdenum
Iron：1~4%, high silicon ferrosilicon：1~4%, manganese metal：8~14%, vanadium iron：25~35%, ferro-boron：2~6%, ferro-niobium：5~
8%, aluminium powder：2~5%, rutile：3~6%, potassium carbonate：2~5%, sodium fluoride：1~3%, slag making is added in the patent
Agent rutile, the lighter weight of rutile occupy most space in medicine core, limit adding for ferroalloy and metal powder
Dosage, the raising of wear-resisting property can be restricted.
In addition, in entire welding process, the molten drop stage of existing extreme temperatures, and the molten bath stage for having temperature slightly lower,
Whichever is required for effectively avoiding air pollution that from just obtaining qualified welding deposited metal in the stage.The prior art typically exists
The effect that deoxidier realizes deoxidation, and a kind of granularity of each deoxidier multiselect are added in medicine core.Due to varigrained powder
With different oxidation activities, the self-shield effect of welding wire can be obviously improved by varigrained above-mentioned medicine core component.Mesh
Before, there is not yet the technology for improving welding wire self-shield effect by control composition granularity discloses.
Invention content
Goal of the invention：For defect in the prior art, the present invention provides a kind of very high content vanadium and is modified built-up welding use
Self-protection flux-cored wire, it is a further object of the present invention to provide the preparation methods of the flux-cored wire.
Technical solution：To achieve the above object, the present invention uses following technical scheme：
The very high content vanadium of the present invention is modified self-protecting flux-cored wire for overlaying welding, and including mild-carbon steel strip and medicine core, medicine core is filled out
It fills in steel band, medicine core includes the component of following mass percentage：The high carbon ferro-chrome of 52~58wt%, the vanadium of 28~36wt%
Iron, the graphite of 1~2wt%, the almag of 1~4wt%, the silicomangan of 3~9wt%, surplus are iron powder, wherein, graphite,
Almag and silicomangan are added respectively at least two different grain sizes, and wherein at least one of different grain size is compared with coarse grain
Degree, such as 40 mesh, 50 mesh, 60 mesh, 70 mesh, 80 mesh, other also at least a kind of finer grain, as 160 mesh, 170 mesh, 180 mesh,
200 mesh, 250 mesh, 300 mesh etc..
Further, the high carbon ferro-chrome phosphorus content is 9~10wt%, and chrome content is 60~70wt%, remaining is iron；Institute
The vanadium iron vanadium content stated is 35~50wt%, remaining is iron；The almag aluminum content is 47~53wt%, remaining is
Magnesium；The silicomangan silicon content is 47~53wt%, remaining is manganese.
Further, the high carbon ferro-chrome, vanadium iron, iron powder granularity be 80 mesh.
Further, the varigrained graphite by the graphite of 60 mesh and 200 mesh according to mass ratio 1:1 is composed.
When mass ratio is less than 1:1, then overlay cladding easily there is stomata, when mass ratio be more than 1:1, then overlay cladding easily there is slag inclusion or be mingled with
Shortcoming, but it is superior to the effect of Monosized powder.
Further, the varigrained almag by the almag of 60 mesh and 200 mesh according to mass ratio 1:1 group
It closes.Mass ratio non-1:Effect same graphite when 1.
Further, the varigrained silicomangan by the silicomangan of 60 mesh and 200 mesh according to mass ratio 1:1 group
It closes.Mass ratio non-1:Effect same graphite when 1.
Further, the mild-carbon steel strip thickness × width is 0.5 × 21mm.
Further, any one in a diameter of 2.8mm, 3.2mm, 3.5mm, 3.8mm and 4.2mm of the welding wire.
Further, the medicine core accounts for the 50-55wt% of welding wire gross weight.
Present invention further propose that above-mentioned very high content vanadium is modified the preparation method of self-protecting flux-cored wire for overlaying welding, including
Following steps：
(1) mild-carbon steel strip is rolled into U-shaped using molding roller, then by dust feeder by any one of claim 1-9
The powder of the medicine core is added in U-lag；
(2) U-lag is healed up, makes medicine core package wherein, by wire drawing die, by road drawing, tube reducing, finally reach diameter
2.8~4.2mm obtains final products.
Each component main function is as follows in above-mentioned medicine core：
High carbon ferro-chrome：Form Cr7C3, Cr23C6, Cr3The carbide of the chromium such as C；And the transition alloy elements into matrix
Cr, and C element is provided.
Vanadium iron：On the one hand vanadium carbide hard phase is formed, on the other hand promotes rich chromium cast iron is hypereutectic to organize to turn to hypoeutectic
Become, overlay cladding toughness is obviously improved.
Graphite：C element is provided, deoxidation forms CO and causes molten bath micro-boiling, reduces stomata sensitivity, and reduce welding atmosphere
In partial pressure of oxygen and nitrogen partial pressure.
Almag：Deoxidation, fixed nitrogen enhance self-shield effect.
Silicomangan：Deoxidation enhances self-shield effect；There is provided transition alloy elements Mn and elements Si simultaneously.
By the effect summary of each component in above-mentioned technical proposal and medicine core it is understood that the present invention in medicine core due to adding
Large content of vanadium, preferentially react disperse educt vanadium carbide in Welding Metallurgy melt with carbon, compared with the heat of chromium carbide
Stability is more preferable, hardness higher, simultaneously because consuming a large amount of carbon during vanadium carbide is formed so that in remaining molten bath
The content value of carbon on the right of eutectic point by moving on the left of eutectic point, it is meant that rich chromium cast iron hardfacing alloy tissue is by hypereutectic tissue
(first eutectoid carbide+eutectic product) changes to hypoeutectic (first analysing austenite+eutectic product).Wherein, eutectic product is by remaining difficult to understand
Family name's body, martensite and tiny carbide mixture are formed.Finally, alloying element or carbon content not anti-reflection increase (significantly in medicine core
Increase content of vanadium) under conditions of, the microscopic structure of High-chromium Cast Iron Flux Cored Wire For Self-shielded is by vanadium carbide+austenite+eutectic carbon
Compound+martensite forms, and vanadium carbide improves high rigidity and high thermal stability in the tissue；Austenite is to obtain enough chromium members
The austenite of plain solution strengthening, it is strong, tough to have both；Eutectic carbide size is tiny, is evenly distributed；Martensite further improves heap
The hardness of solder alloy.In conclusion it is showed by the High-chromium Cast Iron Flux Cored Wire For Self-shielded that very high content v element is modified
Ideal microscopic structure and ingredient, thus determine that the hardfacing alloy has ideal wear-resisting property.
In addition, in medicine core the granularity of graphite, almag and silicomangan it is equal there are two types of：60 mesh and 200 mesh, it is poor with granularity
The mode of different combination is added, it is noted that the combination of other different thicknesses granularities, as long as being that by the technique effect
, also fall into the design of the present invention.In entire welding process, the molten drop stage of existing extreme temperatures, and have the temperature slightly lower
In the molten bath stage, whichever is required for effectively avoiding air pollution that from just obtaining qualified welding deposited metal, seminar in the stage
It is found by a large amount of engineer testing early period, the self-shield of welding wire can be obviously improved by varigrained above-mentioned medicine core component
Effect.This is that varigrained powder has different oxidation activities.Chemical metallurgy reactivity is controlled by component particle size
New approaches add superfine 200 mesh graphite, almag and silicomangan in medicine core, using its welding the temperature rise period into
The effective precedent desoxydation of row, while thicker 60 mesh graphite, almag and silicomangan are added in medicine core, it is allowed in molten drop
Hot stage and molten bath stage can also carry out effective deoxidation gas making, so as to ensureing to be heated in entire welding wire, melting, being formed
Molten drop, the droplet transfer, formed molten bath and start solidification Welding Metallurgy whole process be provided with good self-shield effect, so as to fulfill
This welding wire remains able to have good welding technological properties and weldering in the case of no any mineral powder slag former of addition
Connect metal surface forming.Meanwhile the addition of more granularity deoxidiers, ensure under the adding conditional of smaller deoxidier, obtain good
Self-shield effect, enough additions that medium high carbon ferrochrome, vanadium iron etc. are formulated for medicine core create steric requirements.
Advantageous effect：Compared with prior art, the present invention has the following advantages：
(1) present invention is preferentially occurred by being added to large content of vanadium in medicine core in Welding Metallurgy melt with vanadium
React disperse educt vanadium carbide so that the content value of carbon promotes height by being moved on the right of eutectic point on the left of eutectic point in remaining molten bath
Chrome cast iron hardfacing alloy tissue (is first analysed austenite+eutectic to produce from hypereutectic tissue (first eutectoid carbide+eutectic product) to hypoeutectic
Object) transformation, ideal composition and tissue that vanadium carbide+austenite+eutectic carbide+martensite is formed finally are obtained, improves heap
The toughness and hardness of solder alloy, substantially increase its wearability.
(2) present invention controls the new approaches of chemical metallurgy reactivity by component particle size, is respectively combined and adds in medicine core
Add 200 superfine mesh and thicker 60 mesh graphite, almag and silicomangan, be effectively ensured be heated in entire welding wire, melt,
Formed molten drop, the droplet transfer, formed molten bath and start solidification Welding Metallurgy whole process be provided with good self-shield effect, so as to
This welding wire is realized in the case of no any mineral powder slag former of addition, remains able to have good welding technological properties
And welding bead shaping surface.
(3) flux-cored wire welding procedure performance of the invention is good, and homogenization degree is high, and overlay surface hardness is equal
Even, average hardness is in 58.5~64HRC ranges.Wearability is 30 times or so of Q235.
(4) preparation method of flux-cored wire of the present invention is simple and reliable, is easy to produce in batches, prepared welding wire welding procedure
Functional, deposition efficiency is high, and multilayer welding is without scarfing cinder.
Specific embodiment
The present invention is further explained with reference to embodiment.Because of understanding, following described tools of embodiment
The proportioning of body medicine core component, process conditions and as a result, in order to preferably explain the present invention, the present invention is protected without forming
The restriction of range.Wherein, the high carbon ferro-chrome phosphorus content used in following examples is 9~10wt%, chrome content for 60~
70wt%, remaining is iron；The vanadium iron vanadium content is 35~50wt%, remaining is iron；The almag aluminum content is
47~53wt%, remaining is magnesium；The silicomangan silicon content is 47~53wt%, remaining is manganese.
Embodiment 1
A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding, including mild-carbon steel strip and medicine core, flux cored filler in
In steel band, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 58g, the 80 mesh vanadium iron of 28g, the graphite of 1g, 1g
Almag, the silicomangan of 9g, the 80 mesh iron powders of 3g, wherein, graphite, almag and silicomangan with 60 mesh and
200 two kinds of mesh granularities are added, and the mass fraction of 60 mesh and 200 mesh respectively accounts for 50% in each powder added.By institute
It takes in the various mixed powder machines of powder merging, mixes 40 minutes, then mixed-powder is added in the H08A carbon steels of 21 × 0.5mm of U-shaped
In steel band slot, filling rate 50%.U-lag is healed up again, makes medicinal powder package wherein.Then make it respectively by a diameter of
It is one or more in the wire drawing die of 4.2mm, 3.8mm, 3.5mm, 3.2mm, 2.8mm, by road drawing, tube reducing, finally obtain straight
Diameter is the product of 2.8~4.2mm.Welding current is 280~420A, and weldingvoltage is 30~42V, speed of welding 0.4m/
Min, interlayer temperature control is at 150~250 DEG C, 3 layers of built-up welding.Deposited metal hardness and wearability are shown in Table 1.
Embodiment 2
A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding, including mild-carbon steel strip and medicine core, flux cored filler in
In steel band, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 52g, the 80 mesh vanadium iron of 36g, the graphite of 1.5g,
The almag of 3g, the silicomangan of 3g, the 80 mesh iron powders of 4.5g, wherein, graphite, almag and silicomangan are with 60 mesh
It is added, and the mass fraction of 60 mesh and 200 mesh respectively accounts for 50% in each powder added with 200 mesh, two kinds of granularities.It will
It takes in the various mixed powder machines of powder merging, mixes 40 minutes, then mixed-powder is added in the H08A carbon of 21 × 0.5mm of U-shaped
In steel steel band slot, filling rate 54%.U-lag is healed up again, makes medicinal powder package wherein.Then make it respectively by a diameter of
It is one or more in the wire drawing die of 4.2mm, 3.8mm, 3.5mm, 3.2mm, 2.8mm, by road drawing, tube reducing, finally obtain straight
Diameter is the product of 2.8~4.2mm.Welding current is 280~420A, and weldingvoltage is 30~42V, speed of welding 0.4m/
Min, interlayer temperature control is at 150~250 DEG C, 3 layers of built-up welding.Deposited metal hardness and wearability are shown in Table 1.
Embodiment 3
A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding, including mild-carbon steel strip and medicine core, flux cored filler in
In steel band, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 54g, the 80 mesh vanadium iron of 30g, the graphite of 2g, 4g
Almag, the silicomangan of 5g, the 80 mesh iron powders of 5g, wherein, graphite, almag and silicomangan with 60 mesh and
200 two kinds of mesh granularities are added, and the mass fraction of 60 mesh and 200 mesh respectively accounts for 50% in each powder added.By institute
It takes in the various mixed powder machines of powder merging, mixes 40 minutes, then mixed-powder is added in the H08A carbon steels of 21 × 0.5mm of U-shaped
In steel band slot, filling rate 52%.U-lag is healed up again, makes medicinal powder package wherein.Then make it respectively by a diameter of
It is one or more in the wire drawing die of 4.2mm, 3.8mm, 3.5mm, 3.2mm, 2.8mm, by road drawing, tube reducing, finally obtain straight
Diameter is the product of 2.8~4.2mm.Welding current is 280~420A, and weldingvoltage is 30~42V, speed of welding 0.4m/
Min, interlayer temperature control is at 150~250 DEG C, 3 layers of built-up welding.Deposited metal hardness and wearability are shown in Table 1.
Embodiment 4
A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding, including mild-carbon steel strip and medicine core, flux cored filler in
In steel band, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 56g, the 80 mesh vanadium iron of 32g, the graphite of 1.5g,
The almag of 2g, the silicomangan of 7g, the 80 mesh iron powders of 1.5g, wherein, graphite, almag and silicomangan are with 60 mesh
It is added, and 60 mesh and 200 purposes in each graphite, almag and the silicomangan powder added with 200 mesh, two kinds of granularities
Mass fraction respectively accounts for 50%.By in the taken various mixed powder machines of powder merging, mix 40 minutes, mixed-powder is then added in U
In the H08A carbon steel steel band slots of 21 × 0.5mm of shape, filling rate 55%.U-lag is healed up again, makes medicinal powder package wherein.It connects
Makes it respectively by one or more in the wire drawing die of a diameter of 4.2mm, 3.8mm, 3.5mm, 3.2mm, 2.8mm, by road
Drawing, tube reducing finally obtain the product of a diameter of 2.8~4.2mm.Welding current is 280~420A, weldingvoltage for 30~
42V, speed of welding 0.4m/min, interlayer temperature control is at 150~250 DEG C, 3 layers of built-up welding.Deposited metal hardness and wearability
It is shown in Table 1.
Hardness test uses HR-150A Rockwell apparatuses in table 1, and load 150Kg takes 5 point hardnesses to each test specimens,
Calculate average hardness value.Wear test uses MLS-225 type wet type rubber foot wheel abrasion testers.
The overlay cladding of each embodiment is cut into five sizes as 57 × 25 × 6mm Wear specimens.Wear test parameter is as follows：
Rubber wheel diameter：178mm, rubber wheel speed：240 revs/min, rubber wheel hardness：70 (Shao Er hardness), load：10Kg, rubber wheel
Revolution：1000 turns of pre-grinding, formal test turn 1000 turns, abrasive material：The quartz sand of 40~70 mesh.The wear-resisting property of deposited metal is with just
The weight loss of formula abrasion is weighed.Every time test it is forward and backward sample merging is filled into the beaker of acetone soln, it is clear in ultrasonic wave
It washes in instrument and cleans 3~5 minutes, record of weighing after dry.Experiment Q235 steel sample as a comparison, contrast piece weight loss and measuring piece
Relative wear resistance ε of the ratio between the weight loss as built-up welding sample.
1 each embodiment deposited metal hardness and wear resistance of table
Above example is to play the role of illustrating example to the technical concept of the present invention, can not limit the present invention with this
Protection domain, those skilled in the art modify and are equal in the spirit and scope for not departing from technical solution of the present invention
It replaces, should all fall within the scope and spirit of the invention.
Claims (7)
1. a kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding, including mild-carbon steel strip and medicine core, flux cored filler is in steel
In band, it is characterised in that：The medicine core includes the component of following mass percentage：The high carbon ferro-chrome of 52~58wt%, 28~
The vanadium iron of 36wt%, the graphite of 1~2wt%, the almag of 1~4wt%, the silicomangan of 3~9wt%, surplus are iron powder,
Wherein, graphite, almag and silicomangan are added respectively at least two different grain sizes；The varigrained graphite is by 60
The graphite of mesh and 200 mesh is composed according to mass ratio 1: 1；The varigrained almag is by 60 mesh and the aluminium of 200 mesh
Magnesium alloy is composed according to mass ratio 1: 1；The varigrained silicomangan by the silicomangan of 60 mesh and 200 mesh according to
Mass ratio 1: 1 is composed.
2. very high content vanadium according to claim 1 is modified self-protecting flux-cored wire for overlaying welding, it is characterised in that：The height
Carbon ferrochrome phosphorus content is 9~10wt%, and chrome content is 60~70wt%, remaining is iron；The vanadium iron vanadium content for 35~
50wt%, remaining is iron；The almag aluminum content is 47~53wt%, remaining is magnesium；The silicomangan is siliceous
It measures as 47~53wt%, remaining is manganese.
3. very high content vanadium according to claim 1 is modified self-protecting flux-cored wire for overlaying welding, it is characterised in that：The height
Carbon ferrochrome, vanadium iron, iron powder granularity mesh number be 80 mesh.
4. very high content vanadium according to claim 1 is modified self-protecting flux-cored wire for overlaying welding, it is characterised in that：It is described low
Carbon steel tape thickness × width is 0.5 × 21mm.
5. very high content vanadium according to claim 1 is modified self-protecting flux-cored wire for overlaying welding, it is characterised in that：The weldering
Silk a diameter of 2.8mm, 3.2mm, 3.5mm, 3.8mm and 4.2mm in any one.
6. very high content vanadium according to claim 1 is modified self-protecting flux-cored wire for overlaying welding, it is characterised in that：The medicine
Core accounts for the 50-55wt% of welding wire gross weight.
7. a kind of preparation side that self-protecting flux-cored wire for overlaying welding is modified such as claim 1-6 any one of them very high contents vanadium
Method, it is characterised in that：Include the following steps：
(1) mild-carbon steel strip is rolled into U-shaped using molding roller, medicine core powder is then pressed by welding wire gross weight by dust feeder
50-55wt% is added in U-lag；
(2) U-lag is healed up, makes medicine core package wherein, by wire drawing die, by road drawing, tube reducing, finally diameter is made to reach 2.8
~4.2mm, obtains final products.
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| CN201610612201.6A CN106141484B (en) | 2016-07-28 | 2016-07-28 | A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding and preparation method thereof |
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| CN201610612201.6A CN106141484B (en) | 2016-07-28 | 2016-07-28 | A kind of very high content vanadium is modified self-protecting flux-cored wire for overlaying welding and preparation method thereof |
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| CN112643244B (en) * | 2020-11-30 | 2023-02-14 | 山东聚力焊接材料有限公司 | Self-protection flux-cored wire and preparation method thereof |
| CN112605555A (en) * | 2020-12-04 | 2021-04-06 | 上海焊接器材有限公司 | Self-protection flux-cored wire and preparation method thereof |
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