CN106001995B - A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire - Google Patents
A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire Download PDFInfo
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- CN106001995B CN106001995B CN201610609701.4A CN201610609701A CN106001995B CN 106001995 B CN106001995 B CN 106001995B CN 201610609701 A CN201610609701 A CN 201610609701A CN 106001995 B CN106001995 B CN 106001995B
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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 multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire, and using mild-carbon steel strip as crust, drug core component is by mass percentage：6~45% high carbon ferro-chrome, 3~10% TiN, 3~10% BN, 3~10% B4C, 3~10% TiB2, 3~10% ZrB21~3% graphite, 0.5~1% 60 mesh cellulose powders, 0.5~1% 200 mesh cellulose powders, 1~3% 60 mesh almags, 1~3% 200 mesh almags, 2~5% 60 mesh silicomangans, 2~5% 200 mesh silicomangans, surplus is iron powder, and medicine core powder accounts for the 50 54% 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 pass through the rational proportion with other alloy powders, it is allowed to disperse educt multicomponent nitride and boride in the welding process, there is the features such as hardness is high and uniform, and wearability is good, and welding bead surface, substantially without slag, multilayer welding is not necessarily to scarfing cinder.
Description
Technical field
The invention belongs to the welding fields in Materials Processing Engineering, are assisted more particularly to a kind of multicomponent nitride and boride
With enhancing self-protection flux-cored wire.
Background technology
The hardfacing flux-cored wire of Bead weld repair at present, generally relies on M7C3Based on chromium carbide silicon carbide object
Its hardness, M are provided7C3Microhardness is 1200-1700 HV.Researchers often through addition carbide Nb,
Ti etc. further increases its hardness.On the whole, wear-resistant skeleton function is played in hardfacing alloy tissue by carbide, to carry
The wearability of high hardfacing alloy is the general choice of current welding material manufacturer.
Compared with Carbide Phases, boride and nitride often have higher hardness, to theoretically be capable of providing more
Excellent wear-resisting property, such as B4C, BN is the two of three kinds of most hard materials of currently known nature, and microhardness reaches
3500HV or so.However, in traditional welding process, the brittleness that addition B is easy to cause deposited metal increases, and is primarily due to
In high-temperature fusant process of setting, B reacts generation with other elements and nets dendritic boride, such boride poor toughness is easily produced
Raw crackle, limits its wearability significantly；In addition, the addition of N then easily causes nitrogen pore.
Invention content
Goal of the invention：To solve the technical problems existing in the prior art, a kind of multicomponent nitride of present invention offer and boron
Compound collaboration enhancing self-protection flux-cored wire and preparation method thereof.
Technology contents：To realize the above-mentioned technical purpose, a kind of multicomponent nitride of present invention proposition and boride collaboration enhancing
Self-protection flux-cored wire, including mild-carbon steel strip and medicine core, flux cored filler is in steel band, the drug core component mass percentage
Range is as follows：6~45% high carbon ferro-chrome, 3~10% TiN, 3~10% BN, 3~10% B4C, 3~10%
TiB2, 3~10% ZrB2, 1~3% graphite, 0.5~1% 60 mesh cellulose powders, 0.5~1% 200 mesh celluloses
Powder, 1~3% 60 mesh almags, 1~3% 200 mesh almags, 2~5% 60 mesh silicomangans, 2~5%
200 mesh silicomangans, surplus are iron powder, and medicine core powder accounts for the 50-54% of welding wire gross weight.
Preferably, in the medicine core different-grain diameter cellulose：The cellulose powder of the cellulose of 60 mesh and 200 mesh, with
Mass ratio is 0.5~1：The mode of 0.5~1 combination is added.
The almag of different-grain diameter in the medicine core：The almag of the almag of 60 mesh and 200 mesh, with mass ratio
It is 1~3：The mode of 1~3 combination is added.
The silicomangan of different-grain diameter in the medicine core：The silicomangan of the silicomangan of 60 mesh and 200 mesh, with mass ratio
It is 2~5：The mode of 2~5 combinations is added.
Preferably, the high carbon ferro-chrome in the medicine core, TiN, BN, B4C、TiB2、ZrB2, graphite and iron powder component grain size
It is all higher than or is equal to 80 mesh.
Preferentially, the high carbon ferro-chrome phosphorus content is 9.0~9.5wt%, and chrome content is 62~72wt%, remaining is
Iron；The almag aluminum content is 47~53wt%, remaining is magnesium；The silicomangan silicon content be 47~
53wt%, remaining is manganese.
Preferentially, the mild-carbon steel strip thickness × width is 0.5 × 21 mm.
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.
The preparation method of above-mentioned multicomponent nitride and boride collaboration enhancing self-protection flux-cored 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 50-54% 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 reaches its diameter
To 2.8~4.2 mm, final products are obtained.
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 C into matrix.
TiN、BN、B4C、TiB2And ZrB2：Dispersed precipitate provides ideal wear-resisting object phase in hardfacing alloy tissue；Simultaneously
Refine hardfacing alloy tissue.
Graphite：C element, deoxidation are provided, gas making (CO) reduces stomata sensitivity.
Cellulose：Deoxidation, gas making enhance self-shield effect.
Almag：Deoxidation, fixed nitrogen (from the N invaded in air in welding metal), enhances self-shield effect.
Silicomangan：Deoxidation enhances self-shield effect；Transition alloy elements Mn and elements Si.
By the effect summary of each component in above-mentioned technical proposal and medicine core it is understood that the present invention due to simultaneously in medicine core
Add polynary high rigidity nitride and boride TiN, BN, B4C、TiB2And ZrB2, analysed in advance in weld physics metallurgical melt
Go out, and Dispersed precipitate.To make tissue be fined, and the formation that tradition nets dendritic boride is avoided, this can all increase heap
Weld metal obdurability.Also, due to first analysing TiN, BN, B4C、TiB2And ZrB2With than its (Cr, Fe)7C3Carbide is higher hard
Degree and thermal stability, greatly improve the hardness and wearability of deposited metal.Also the expensive alloying elements such as niobium, vanadium are not added with, significantly
Welding wire manufacturing cost has been saved, a small amount of multielement enhanced original intention has been realized, has reached the purpose of the present invention.
In the above-mentioned technical solutions, the addition manner of the nitride and boride is multiplexed combination.This is because
On the one hand, TiN, BN, B4C、TiB2And ZrB2High rigidity, high heat stability performance be approximate convergent, this all greatly contributes to heap
Solder alloy wearability；On the other hand, TiN, BN, B4C、TiB2And ZrB2The physical and chemical performances such as fusing point, form difference again, this
It not only improves hard particle and is precipitated in the wider high-temperature temperature section successive of welding early solidification and strengthened carefully with constituting graded multicomponent
Change effect, and the ingredient for being conducive to abundant hard phase provides more effectively to resist the grinding under especially complex working conditions
Stable excellent wear.
In medicine core the granularity of cellulose, almag and silicomangan it is equal there are two types of：60 mesh and 200 mesh, with particle size differences
The mode of combination is added.In the whole welding process, the molten drop stage of existing extreme temperatures, and the molten bath rank for having temperature slightly lower
Section, whichever are required for effectively avoiding air pollution just that qualified welding deposited metal can be obtained in stage, before seminar passes through
Phase, a large amount of engineer testing was found, the self-shield effect of welding wire can be obviously improved by varigrained above-mentioned medicine core component.
This, which is varigrained powder, has different oxidation activities.The new think of of chemical metallurgy reactivity is controlled by component particle size
Superfine 200 mesh celluloses, almag and silicomangan are added in road in medicine core, are carried out in the welding temperature rise period using it
Effective precedent desoxydation, while thicker 60 mesh celluloses, almag and silicomangan are added in medicine core, it is allowed to be retained in
Molten drop hot stage and molten bath stage can also carry out effective deoxidation gas making, to ensure entire welding wire is heated, fusing,
Molten drop, droplet transfer are formed, molten bath is formed and the Welding Metallurgy whole process for starting to solidify is provided with good self-shield effect, to
This welding wire is realized in the case of any mineral powder slag former of no addition, remains able to have good welding technological properties
And welding metal shaping surface.
Advantageous effect：The present invention in medicine core by adding multicomponent nitride and boride TiN, BN, B simultaneously4C、TiB2And
ZrB2, a large amount of disperse educts are precipitated in advance during Welding Metallurgy, high rigidity, high thermal stability and thinning microstructure are provided, and
By avoiding single multicomponent mixture addition manner from efficiently using TiN, BN, B4C、TiB2And ZrB2Fusing point, form etc. in materialization
Difference in performance obtains high-temperature temperature section successive and is precipitated and strengthen thinning effect to constitute graded multicomponent, is also beneficial to enrich
The ingredient of hard phase provides more stable excellent wear effectively to resist the grinding under especially complex working conditions.And
And the new approaches of chemical metallurgy reactivity are controlled by component particle size, be respectively combined in medicine core add superfine 200 mesh and
Thicker 60 mesh celluloses, almag and silicomangan, be effectively ensured entire welding wire it is heated, fusing, form molten drop, molten drop
Transition, formed molten bath and start solidification Welding Metallurgy whole process be provided with good self-shield effect, to realize this welding wire
In the case of any mineral powder slag former of no addition, remain able to have good welding technological properties and welding bead surface at
Shape.The flux-cored wire welding procedure performance of the present invention is good, and homogenization degree is high, and overlay surface hardness is uniform, average hard
Degree is in 60~66 HRC ranges.Wearability is 25~36 times of Q235.
Specific implementation mode
According to following embodiments, the present invention may be better understood.However, specific medicine core component described in 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 9.0~9.5wt%, chrome content 62
~72wt%, remaining is iron；The almag aluminum content is 47~53wt%, remaining is magnesium；The silicomangan contains
Silicon amount is 47~53wt%, remaining is manganese.
Embodiment 1
A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core,
Flux cored filler in steel band, by following quality prepared by drug core component：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band
In, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 45 g, the 80 mesh TiN of 8 g, 10 g 80 mesh BN, 3
The 80 mesh B of g4C, the 80 mesh TiB of 5 g2, 6 g 80 mesh ZrB2, the 80 mesh graphite of 1 g, the 60 mesh cellulose powders of 0.5 g, 0.5
The 200 mesh cellulose powders of g, the 60 mesh almags of 1 g, the 200 mesh almags of 3 g, 60 mesh silicomangans, 3 g of 2 g
200 mesh silicomangans, the 80 mesh iron powders of 12 g.Taken various powder mergings are mixed in powder machine, are mixed 40 minutes, then mixed
In the H08A carbon steel steel band slots for closing 21 × 0.5 mm that U-shaped is added in powder, filling rate 54%.U-lag is healed up again, makes medicinal powder
Package is wherein.Then make its respectively by a diameter of 4.2 mm, 3.8 mm, 3.5 mm, 3.2 mm, 2.8 mm wire drawing die in
It is one or more, by road drawing, tube reducing, finally obtain the product of a diameter of 2.8~4.2 mm.Welding current is 280~420
A, weldingvoltage are 30~42 V, and speed of welding is 0.4 m/min, and interlayer temperature control is at 150~250 DEG C, 3 layers of built-up welding.Heap
Weldering metal hardness and wearability are shown in Table 1.
Embodiment 2
A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core,
Flux cored filler in steel band, by following quality prepared by drug core component：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band
In, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 40 g, the 80 mesh TiN of 3 g, 5 g 80 mesh BN, 10
The 80 mesh B of g4C, the 80 mesh TiB of 4 g2, 3 g 80 mesh ZrB2, the 80 mesh graphite of 2 g, the 60 mesh cellulose powders of 1g, 1 g
200 mesh cellulose powders, the 60 mesh almags of 2 g, the 200 mesh almags of 2 g, the 60 mesh silicomangans of 5 g, 2 g
200 mesh silicomangans, the 80 mesh iron powders of 20 g.Taken various powder mergings are mixed in powder machine, are mixed 40 minutes, then mixing
Powder is added in the H08A carbon steel steel band slots of 21 × 0.5 mm of U-shaped, filling rate 50%.U-lag is healed up again, makes medicinal powder package
It wraps up in wherein.Then make its respectively by a diameter of 4.2 mm, 3.8 mm, 3.5 mm, 3.2 mm, 2.8 mm wire drawing die in one
Kind is a variety of, by road drawing, tube reducing, finally obtains the product of a diameter of 2.8~4.2 mm.Welding current is 280~420 A,
Weldingvoltage is 30~42 V, and speed of welding is 0.4 m/min, and interlayer temperature control is at 150~250 DEG C, 3 layers of built-up welding.Built-up welding
Metal hardness and wearability are shown in Table 1.
Embodiment 3
A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core,
Flux cored filler in steel band, by following quality prepared by drug core component：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band
In, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 36 g, the 80 mesh TiN of 10 g, 7 g 80 mesh BN, 5
The 80 mesh B of g4C, the 80 mesh TiB of 3 g2, 10 g 80 mesh ZrB2, the 80 mesh graphite of 3 g, the 60 mesh cellulose powders of 0.6 g,
60 mesh silicomanganese of the 200 mesh cellulose powders of 0.6 g, the 60 mesh almags of 2 g, the 200 mesh almags of 1 g, 3 g close
200 mesh silicomangans of gold, 5 g, the 80 mesh iron powders of 13.8 g.Taken various powder mergings are mixed in powder machine, are mixed 40 minutes,
Then mixed-powder is added in the H08A carbon steel steel band slots of 21 × 0.5 mm of U-shaped, filling rate 53%.U-lag is closed again
Mouthful, make medicinal powder package wherein.Then make it respectively by a diameter of 4.2 mm, 3.8 mm, 3.5 mm, 3.2 mm, 2.8 mm
It is one or more in wire drawing die, by road drawing, tube reducing, finally obtain the product of a diameter of 2.8~4.2 mm.Welding current is
280~420 A, weldingvoltage are 30~42 V, and speed of welding is 0.4 m/min, and interlayer temperature control is at 150~250 DEG C, heap
3 layers of weldering.Deposited metal hardness and wearability are shown in Table 1.
Embodiment 4
A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core,
Flux cored filler in steel band, by following quality prepared by drug core component：Including mild-carbon steel strip and medicine core, flux cored filler is in steel band
In, drug core component is prepared by following quality：The 80 mesh high carbon ferro-chromes of 38 g, the 80 mesh TiN of 5 g, the 80 mesh BN, 8 g of 3 g
80 mesh B4C, the 80 mesh TiB of 10 g2, 5 g 80 mesh ZrB2, the 80 mesh graphite of 2 g, the 60 mesh cellulose powders of 1g, 1 g
200 mesh cellulose powders, the 60 mesh almags of 3 g, the 200 mesh almags of 1 g, the 60 mesh silicomangans of 4 g, 4 g
200 mesh silicomangans, the 80 mesh iron powders of 15 g.Taken various powder mergings are mixed in powder machine, are mixed 40 minutes, then mixing
Powder is added in the H08A carbon steel steel band slots of 21 × 0.5 mm of U-shaped, filling rate 52%.U-lag is healed up again, makes medicinal powder package
It wraps up in wherein.Then make its respectively by a diameter of 4.2 mm, 3.8 mm, 3.5 mm, 3.2 mm, 2.8 mm wire drawing die in one
Kind is a variety of, by road drawing, tube reducing, finally obtains the product of a diameter of 2.8~4.2 mm.Welding current is 280~420 A,
Weldingvoltage is 30~42 V, and speed of welding is 0.4 m/min, and interlayer temperature control is at 150~250 DEG C, 3 layers of built-up welding.Built-up welding
Metal hardness and wearability are shown in Table 1.
1 beaten hardness of table uses HR-150A Rockwell apparatuses, 150 Kg of load to take 5 point hardnesses to each test specimens,
Calculate average hardness value.
Wear test uses MLS-225 type wet type rubber foot wheel abrasion testers.
It is 57 × 25 × 6 mm Wear specimens that the overlay cladding of each embodiment, which is cut five sizes,.Wear test parameter is such as
Under：Rubber wheel diameter：178 mm, rubber wheel speed：240 revs/min, rubber wheel hardness：70 (Shao Er hardness), load：10 Kg,
Rubber wheel revolution：1000 turns of pre-grinding, formal test turn 1000 turns, abrasive material：The quartz sand of 40~70 mesh.The wearability of deposited metal
It can be weighed with the weight loss that formally wears.Every time test it is forward and backward sample merging is filled into the beaker of acetone soln, super
It is cleaned 3~5 minutes in sound wave cleaning device, record of weighing after dry.Experiment Q235 steel sample as a comparison, contrast piece weight loss with
Relative wear resistance ε of the ratio between the measuring piece weight loss as built-up welding sample.
1 each embodiment deposited metal hardness and wear resistance of table
In conclusion welding wire provided by the invention ensure that good welding by adding varigrained medicine core component
Processing performance, and by the rational proportion with other alloy powders, be allowed to disperse educt multicomponent nitride in the welding process and
Boride has the features such as hardness is high and uniform, and wearability is good, and welding bead surface, substantially without slag, multilayer welding is not necessarily to scarfing cinder.
Claims (9)
1. a kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire, including mild-carbon steel strip and medicine core, medicine
Core is filled in steel band, which is characterized in that the drug core component is by mass percentage：6~45% high carbon ferro-chrome, 3~
10% TiN, 3~10% BN, 3~10% B4C, 3~10% TiB2, 3~10% ZrB2, 1~3% graphite, 0.5~1%
60 mesh cellulose powders, 0.5~1% 200 mesh cellulose powders, 1~3% 60 mesh almags, 1~3% 200 mesh aluminium
Magnesium alloy, 2~5% 60 mesh silicomangans, 2~5% 200 mesh silicomangans, surplus is iron powder, and medicine core powder accounts for welding wire gross weight
50-54%.
2. multicomponent nitride according to claim 1 and boride collaboration enhancing self protection pile-up welding flux core welding wire, feature
It is the cellulose of different-grain diameter：The cellulose powder of the cellulose of 60 mesh and 200 mesh, with mass ratio for 0.5 ~ 1：0.5 ~ 1 group
The mode of conjunction is added.
3. multicomponent nitride according to claim 1 and boride collaboration enhancing 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, with mass ratio for 1 ~ 3：1 ~ 3 combination
Mode be added.
4. multicomponent nitride according to claim 1 and boride collaboration enhancing self protection pile-up welding flux core welding wire, feature
It is the silicomangan of different-grain diameter：The silicomangan of the silicomangan of 60 mesh and 200 mesh, with mass ratio for 2 ~ 5：2 ~ 5 combinations
Mode be added.
5. multicomponent nitride according to claim 1 and boride collaboration enhancing self protection pile-up welding flux core welding wire, feature
It is, high carbon ferro-chrome, TiN, BN, B in the medicine core4C、TiB2、ZrB2, graphite and iron powder component grain size be all higher than or wait
In 80 mesh.
6. multicomponent nitride according to claim 1 and boride collaboration enhancing self protection pile-up welding flux core welding wire, feature
It is, the high carbon ferro-chrome phosphorus content is 9.0~9.5wt%, and chrome content is 62~72wt%, remaining is iron；The magnalium
Alloy containing aluminum amount is 47~53wt%, remaining is magnesium；The silicomangan silicon content is 47~53wt%, remaining is manganese.
7. multicomponent nitride according to claim 1 and boride collaboration enhancing self protection pile-up welding flux core welding wire, feature
It is, the mild-carbon steel strip thickness × width is 0.5 × 21 mm.
8. multicomponent nitride according to claim 1 and boride collaboration enhancing 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.
9. the preparation method of multicomponent nitride described in claim 1 and boride collaboration enhancing 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
50-54% 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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| CN201610609701.4A CN106001995B (en) | 2016-07-28 | 2016-07-28 | A kind of multicomponent nitride and boride collaboration enhancing self protection pile-up welding flux core welding wire |
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| CN107186379A (en) * | 2017-05-12 | 2017-09-22 | 天长市通联焊业有限公司 | A kind of low-alloy structural steel flux-cored wire and preparation method thereof |
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| CN106001995A (en) | 2016-10-12 |
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