CN106001993B - A kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire and preparation method thereof - Google Patents
A kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire and preparation method thereof Download PDFInfo
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- CN106001993B CN106001993B CN201610606654.8A CN201610606654A CN106001993B CN 106001993 B CN106001993 B CN 106001993B CN 201610606654 A CN201610606654 A CN 201610606654A CN 106001993 B CN106001993 B CN 106001993B
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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
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- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
The present invention discloses a kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, and using mild-carbon steel strip as crust, drug core component is by mass percentage：50~60% high carbon ferro-chrome, 30~38% self-fluxing alloyed powder, 1~3% 60 mesh graphite, 1~5% 200 mesh graphite, 1~2% 60 mesh almags, 1~2% 200 mesh almags, 1~2% 60 mesh manganese powders, 1~3% 200 mesh manganese powders, surplus is iron powder, wherein self-fluxing alloyed powder is the mixture of ferro-boron and ferrosilicon, mass ratio：Ferro-boron：Ferrosilicon=1~2, medicine core powder account for the 50 55% of welding wire gross weight.Welding wire provided by the invention, by adding varigrained medicine core component, it ensure that good welding technological properties, and by adding in the self-melting alloy element such as B, Si simultaneously in medicine core, effectively reduce bead welding surface tension, bead welding shaping is effectively improved, built-up welding efficiency is effectively improved, effectively expands welding parameter.
Description
Technical field
The invention belongs to the welding fields in Materials Processing Engineering, change more particularly to a kind of doping of self-fluxing alloyed powder
Property self protection pile-up welding flux core welding 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.Heap soldering
The wear-resisting property of gold depends greatly on the additive amount of alloy powder, i.e. alloy powder ratio shared in medicine core.
In order to increase the loadings of alloy powder in flux-cored wire, seminar has developed a series of no slag self-shield heap welding agent in recent years
Core welding wire, almost without adding any mineral powder in the medicine core of such novel welding wire so that the loadings of alloy obtain maximum journey
The increase of degree, and add with this fill factor of flux-cored wire, effectively increase carbide quantity in hardfacing alloy and
Hardness becomes one of most potential material with prospect in built-up welding field.
However, due in medicine core alloy amount it is excessive, frequently result in that hardfacing alloy surface tension is excessive, and mobility is poor, weldering
Road height is narrow, affects the welding technological properties of hardfacing alloy, and limit non-slag self-protection build applies range.
The content of the invention
Goal of the invention：To solve technical problem in the prior art, the present invention provides a kind of self-fluxing alloyed powder
Doping vario-property self protection pile-up welding flux core welding wire and preparation method thereof.
Technology contents：To realize above-mentioned technical purpose, the present invention proposes a kind of self-fluxing alloyed powder doping vario-property self-insurance
Flux-cored wire is protected, including mild-carbon steel strip and medicine core, flux cored filler is in steel band, the drug core component mass percentage
Scope is as follows：50~60% high carbon ferro-chrome, 30~38% self-fluxing alloyed powder, 1~3% 60 mesh graphite, 1~5%
200 mesh graphite, 1~2% 60 mesh almags, 1~2% 200 mesh almags, 1~2% 60 mesh manganese powders, 1~
3% 200 mesh manganese powders, surplus is iron powder, and wherein self-fluxing alloyed powder is the mixture of ferro-boron and ferrosilicon, mass ratio：Boron
Iron：Ferrosilicon=1~2, medicine core powder account for the 50-55% of welding wire gross weight.
Preferably, the high carbon ferro-chrome phosphorus content is 9~10wt%, and chrome content is 60~70wt%, remaining is iron；
The ferrosilicon silicon content is 72~80wt%, remaining is iron；The ferro-boron boron content is 19~25wt%, remaining is iron；
The almag aluminum content is 47~53wt%, remaining is magnesium.
Preferably, varigrained graphite in the medicine core：The graphite of the graphite of 60 mesh and 200 mesh, and with mass ratio 1~
3：The mode of 1~5 combination adds in.
Preferably, in the medicine core different-grain diameter almag：The almag of the almag of 60 mesh and 200 mesh,
And with mass ratio 1~2：The mode of 1~2 combination adds in.
Preferably, in the medicine core different-grain diameter manganese powder：The manganese powder of the manganese powder of 60 mesh and 200 mesh, and with mass ratio 1~
2：The mode of 1~3 combination adds in.
Preferably, in the medicine core, the grain size of high carbon ferro-chrome, ferrosilicon, ferro-boron and iron powder component in the medicine core is impartial
In 80 mesh.
Preferably, in the medicine core, the mild-carbon steel strip thickness × width is 0.5 × 21mm.
Preferably, in the medicine core, in a diameter of 2.8mm, 3.2mm, 3.5mm, 3.8mm and 4.2mm of the welding wire
Any one.
The preparation method of above-mentioned self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, includes the following steps：
(1) mild steel steel band is rolled into U-shaped using molding roller, it is then by dust feeder that medicine core powder is total by welding wire
The 50-55% of weight 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 its diameter
To 2.8~4.2mm, final products are obtained.
Each component main function is as follows in above-mentioned medicine core：
High carbon ferro-chrome：The transition alloy elements Cr into deposited metal, and C element is provided.
Ferro-boron and ferrosilicon：As self-melting alloy element, welding wire fusing point is effectively reduced, reduces weld pool surface tension, is improved
Molten bath mobility optimizes figuration of bead.
Graphite：C element is provided, deoxidation forms CO, and reduces the partial pressure of oxygen in welding atmosphere and nitrogen partial pressure.
Almag：Deoxidation, fixed nitrogen enhance self-shield effect.
Manganese powder：Deoxidation enhances self-shield effect；Transition alloy elements Mn.
By the effect summary of each component in above-mentioned technical proposal and medicine core it is understood that the present invention is due to by medicine core
The self-melting alloy element such as B, Si is added in simultaneously, the self-shield effect of welding wire is not only enhanced, and effectively reduces bead welding
Surface tension is effectively improved bead welding shaping, effectively improves built-up welding efficiency, effectively expand welding parameter.Experimental study
Show in this flux for flux-cored wire components system, 80 mesh self-fluxing alloyed powders of addition 30~38% (ferro-boron and ferrosilicon it is mixed
Close object), and its mass ratio：Ferro-boron：During ferrosilicon=1~2, built-up welding resultant effect is preferable.If self-melting alloy element additive amount
It is very few, welding wire fusing point can not be effectively reduced, improves figuration of bead quality, if self-melting alloy element additive amount is excessive, heap
The tearing tendency increase of solder alloy.If quality compares ferro-boron in mixture：Ferrosilicon>2, then overlay cladding crack resistance is insufficient, mass ratio
Ferro-boron：Ferrosilicon<1, then hardfacing alloy rough surface, matt.
In addition, in medicine core the granularity of graphite, almag and manganese powder it is equal there are two types of：60 mesh and 200 mesh, with particle size differences group
The mode of conjunction is added.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, and seminar is big by early period
The engineer testing of amount is found, the self-shield effect of welding wire can be obviously improved by varigrained above-mentioned medicine core component.This is
Varigrained powder has different oxidation activities.The new approaches of chemical metallurgy reactivity are controlled by component particle size,
Superfine 200 mesh graphite, almag and manganese powder are added in medicine core, in the welding temperature rise period effectively take off in advance using it
Oxygen, while thicker 60 mesh graphite, almag and manganese powder are added in medicine core, using being retained in molten drop hot stage and molten bath
Stage can also carry out effective deoxidation gas making, so as to ensure to be heated in entire welding wire, melt, formed molten drop, the droplet transfer,
The Welding Metallurgy whole process for forming molten bath and starting to solidify is provided with good self-shield effect, it is achieved thereby that this welding wire is not having
In the case of adding any mineral powder slag former, remain able to possess good welding technological properties and welding metal surface into
Shape.Meanwhile the addition of more granularity deoxidiers, ensure under the adding conditional of smaller deoxidier, obtain good self-shield effect, be
Enough additions of medicine core formula medium high carbon ferrochrome, self-fluxing alloyed powder create steric requirements.
Advantageous effect：The present invention not only enhances weldering by adding in the self-melting alloy element such as B, Si simultaneously in medicine core
The self-shield effect of silk, and bead welding surface tension is effectively reduced, bead welding shaping is effectively improved, effectively improves built-up welding
Deposition efficiency effectively expands welding parameter.In addition, the new think of of chemical metallurgy reactivity is also controlled by component particle size
Road is respectively combined in medicine core and adds 200 superfine mesh and thicker 60 mesh graphite, almag and manganese powder, is effectively ensured
Entire welding wire is heated, melts, forms molten drop, droplet transfer, the Welding Metallurgy whole process that forms molten bath and start to solidify be provided with it is good
Good self-shield effect, it is achieved thereby that this welding wire remains able to have in the case of no any mineral powder slag former of addition
Standby good welding technological properties.The flux-cored wire welding procedure performance of the present invention is good, and welding condition window is wide, built-up welding effect
Rate is high, figuration of bead is beautiful, overlay surface hardness is uniform, and wearability is good.
Specific embodiment
According to following embodiments, the present invention may be better understood.However, the described specific medicine core component of embodiment
Proportioning, process conditions and its result are merely to illustrate the present invention, are retouched in detail without that should will not limit in claims
The present invention stated.Wherein, the high carbon ferro-chrome phosphorus content used in following examples is 9~10wt%, chrome content for 60~
70wt%, remaining is iron；The ferrosilicon silicon content is 72~80wt%, remaining is iron；The ferro-boron boron content for 19~
25wt%, remaining is iron；The almag aluminum content is 47~53wt%, remaining is magnesium.
Embodiment 1
A kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core, medicine core
It is filled in steel band, drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler in steel band,
Drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band, and drug core component is by following
Quality is prepared：The 80 mesh high carbon ferro-chromes of 60g, the 80 mesh self-fluxing alloyed powders of 32g, the 60 mesh graphite of 1g, 200 mesh of 2g
Graphite, the 60 mesh almags of 1g, the 200 mesh almags of 1g, the 60 mesh manganese powders of 1g, the 200 mesh manganese powders of 1g, the 80 mesh iron of 1g
Powder, wherein self-fluxing alloyed powder are the mixture of ferro-boron and ferrosilicon, mass ratio：Ferro-boron：Ferrosilicon=1.By taken various powder
End is inserted in mixed powder machine, is mixed 40 minutes, in the H08A carbon steel steel band slots for the 21 × 0.5mm for then mixed-powder being added in U-shaped,
Filling rate is 55%.U-lag is healed up again, makes medicinal powder package wherein.Then make its respectively by a diameter of 4.2mm, 3.8mm,
One or more in the wire drawing die of 3.5mm, 3.2mm, 2.8mm, by road drawing, tube reducing, finally obtain a diameter of 2.8~
The product of 4.2mm.Welding current be 280~420A, weldingvoltage be 30~42V, speed of welding 0.4m/min, interlayer temperature
Control is at 150~250 DEG C, 3 layers of built-up welding.Overlaying shaping, hardness and wearability are shown in Table 1.
Embodiment 2
A kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core, medicine core
It is filled in steel band, drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler in steel band,
Drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band, and drug core component is by following
Quality is prepared：The 80 mesh high carbon ferro-chromes of 50g, the 80 mesh self-fluxing alloyed powders of 38g, the 60 mesh graphite of 3g, 200 mesh of 1g
Graphite, the 60 mesh almags of 2g, the 200 mesh almags of 2g, the 60 mesh manganese powders of 2g, the wherein 200 mesh manganese powders of 2g, self-fluxing nature
Alloy powder is the mixture of ferro-boron and ferrosilicon, mass ratio：Ferro-boron：Ferrosilicon=2.Taken various powder are inserted into mixed powder machine
It is interior, it mixes 40 minutes, in the H08A carbon steel steel band slots for the 21 × 0.5mm for then mixed-powder being added in U-shaped, filling rate is
50%.U-lag is healed up again, makes medicinal powder package wherein.Then make its respectively by a diameter of 4.2mm, 3.8mm, 3.5mm,
One or more in the wire drawing die of 3.2mm, 2.8mm by road drawing, tube reducing, finally obtain the production of a diameter of 2.8~4.2mm
Product.Welding current is 280~420A, and weldingvoltage is 30~42V, and speed of welding 0.4m/min, interlayer temperature control is 150
~250 DEG C, 3 layers of built-up welding.Overlaying shaping, hardness and wearability are shown in Table 1.
Embodiment 3
A kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core, medicine core
It is filled in steel band, drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler in steel band,
Drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band, and drug core component is by following
Quality is prepared：The 80 mesh high carbon ferro-chromes of 52g, the 80 mesh self-fluxing alloyed powders of 34g, the 60 mesh graphite of 2g, 200 mesh of 5g
Graphite, the 60 mesh almags of 1.5g, the 200 mesh almags of 1.5g, the 60 mesh manganese powders of 1.5g, the 200 mesh manganese powders of 2g, 0.5g
80 mesh iron powders, wherein self-fluxing alloyed powder is the mixture of ferro-boron and ferrosilicon, mass ratio：Ferro-boron：Ferrosilicon=1.5.It will
Various powder is taken to insert in mixed powder machine, are mixed 40 minutes, then mixed-powder are added in the H08A carbon of 21 × 0.5mm of U-shaped
In steel steel band slot, filling rate 52%.U-lag is healed up again, makes medicinal powder package wherein.Then it is made respectively by a diameter of
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
Footpath 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.Overlaying shaping, hardness and wearability are shown in Table 1.
Embodiment 4
A kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core, medicine core
It is filled in steel band, drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler in steel band,
Drug core component is prepared by following quality：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band, and drug core component is by following
Quality is prepared：The 80 mesh high carbon ferro-chromes of 55g, the 80 mesh self-fluxing alloyed powders of 30g, the 60 mesh graphite of 1g, 200 mesh of 3g
Graphite, the 60 mesh almags of 1g, the 200 mesh almags of 1.5g, the 60 mesh manganese powders of 1.5g, the 200 mesh manganese powders of 3g, the 80 of 4g
Mesh iron powder, wherein self-fluxing alloyed powder are the mixture of ferro-boron and ferrosilicon, mass ratio：Ferro-boron：Ferrosilicon=1.5.It will be taken
Various powder are inserted in mixed powder machine, are mixed 40 minutes, then mixed-powder are added in the H08A carbon steel steel of 21 × 0.5mm of U-shaped
In trough of belt, filling rate 54%.U-lag is healed up again, makes medicinal powder package wherein.Then make its respectively by a diameter of 4.2mm,
One or more in the wire drawing die of 3.8mm, 3.5mm, 3.2mm, 2.8mm by road drawing, tube reducing, finally obtain a diameter of 2.8
The product of~4.2mm.Welding current be 280~420A, weldingvoltage be 30~42V, speed of welding 0.4m/min, interlayer temperature
Degree control is at 150~250 DEG C, 3 layers of built-up welding.Overlaying shaping, hardness and wearability are shown in Table 1.
Table 1 beats hardness using HR-150A Rockwell apparatuses, and load 150Kg takes each test specimens 5 point hardnesses, counts
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.It is clear in ultrasonic wave in testing forward and backward every time by sample and inserting and fill the beaker of acetone soln
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
The present invention not only enhances the self-shield of welding wire by adding in the self-melting alloy element such as B, Si simultaneously in medicine core
Effect, and bead welding surface tension is effectively reduced, bead welding shaping is effectively improved, effectively improves built-up welding deposition efficiency,
Effectively expand welding parameter.In addition, the new approaches of chemical metallurgy reactivity are also controlled by component particle size, in medicine core
Be respectively combined and add 200 superfine mesh and thicker 60 mesh graphite, almag and manganese powder, be effectively ensured entire welding wire by
Heat, fusing, formed molten drop, the droplet transfer, formed molten bath and start solidification Welding Metallurgy whole process be provided with good self-shield
Effect, it is achieved thereby that this welding wire remains able to possess good weldering in the case of no any mineral powder slag former of addition
Connect processing performance.The flux-cored wire welding procedure performance of the present invention is good, and welding condition window is wide, built-up welding is efficient, welding bead
Shaping is beautiful, overlay surface hardness is uniform, and wearability is good.
Claims (8)
1. a kind of self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core, medicine core is filled out
It fills in steel band, which is characterized in that the drug core component mass percentage scope is as follows：50~60% high carbon ferro-chrome, 30
~38% self-fluxing alloyed powder, 1~3% 60 mesh graphite, 1~5% 200 mesh graphite, 1~2% 60 mesh almags, 1
~2% 200 mesh almags, 1~2% 60 mesh manganese powders, 1~3% 200 mesh manganese powders, surplus is iron powder, and wherein self-fluxing nature is closed
Bronze is last for ferro-boron and the mixture of ferrosilicon, mass ratio：Ferro-boron：Ferrosilicon=1~2, medicine core powder account for the 50- of welding wire gross weight
55%, wherein, the high carbon ferro-chrome phosphorus content is 9~10wt%, and chrome content is 60~70wt%, remaining is iron；The ferrosilicon
Silicon content is 72~80wt%, remaining is iron；The ferro-boron boron content is 19~25wt%, remaining is iron；The magnalium closes
Golden aluminum content is 47~53wt%, remaining is magnesium.
2. according to claim 1 contain self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, feature
It is varigrained graphite：The graphite of the graphite of 60 mesh and 200 mesh, and with mass ratio（1~3）：（1~5）The mode of combination adds
Enter.
3. according to claim 1 contain self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, feature
It is the almag of different-grain diameter：The almag of the almag of 60 mesh and 200 mesh, and with mass ratio 1 ~ 2：1 ~ 2 combination
Mode add in.
4. according to claim 1 contain self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, feature
It is the manganese powder of different-grain diameter：The manganese powder of the manganese powder of 60 mesh and 200 mesh, and with mass ratio 1 ~ 2：The mode of 1 ~ 3 combination adds in.
5. according to claim 1 contain self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, feature
It is, the grain size of high carbon ferro-chrome, ferro-boron, ferrosilicon and iron powder component in the medicine core is equal to 80 mesh.
6. according to claim 1 contain self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, feature
It is, the mild-carbon steel strip thickness × width is 0.5 × 21 mm.
7. according to claim 1 contain self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire, feature
It is, any one in a diameter of 2.8 mm of the welding wire, 3.2 mm, 3.5 mm, 3.8 mm and 4.2mm.
8. the preparation method described in claim 1 containing self-fluxing alloyed powder doping vario-property self protection pile-up welding flux core welding wire,
It is characterised in that it includes following steps：
（1）Mild steel steel band is rolled into U-shaped using molding roller, medicine core powder is then pressed by welding wire gross weight by dust feeder
50-55% 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 reaches its diameter
2.8~4.2 mm, obtain final products.
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