CN106392361A - Silicon annealed high-chromium cast iron type self-protection flux-cored wire and preparation method thereof - Google Patents
Silicon annealed high-chromium cast iron type self-protection flux-cored wire and preparation method thereof Download PDFInfo
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- CN106392361A CN106392361A CN201610605420.1A CN201610605420A CN106392361A CN 106392361 A CN106392361 A CN 106392361A CN 201610605420 A CN201610605420 A CN 201610605420A CN 106392361 A CN106392361 A CN 106392361A
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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
-
- 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 invention discloses a silicon annealed high-chromium cast iron type self-protection flux-cored wire. A mild-carbon steel strip serves as the skin. A flux core is composed of, by mass, 60-75% of 80-mesh high-carbon ferro-chrome, 12-16% of 80-mesh silicon iron, 0.5-1% of 60-mesh graphite, 1-2% of 200-mesh graphite, 1-5% of 60-mesh ferro-boron, 1-3% of 200-mesh ferro-boron, 1-2% of 60-mesh aluminum magnesium alloy, 1-2% of 200-mesh aluminum magnesium alloy, 1-2% of 60-mesh manganese powder, 1-3% of 200-mesh manganese powder, and the balance 80-mesh iron powder. According to the wire provided by the invention, excellent welding technological performance is guaranteed by adding flux core components with different particle sizes; a proper amount of Si is added into the flux core, (Cr,Fe)7C3 carbide in the surfacing alloy high-chromium cast iron type hypereutectic structures is refined, the Fe3Si phase is formed, the toughness of a surfacing layer is remarkably improved, and the abrasion resistance is good; and in addition, the welding technological performance is excellent, the melting efficiency is high, slag removal is not needed during multilayer welding, and the manufacturing cost of the wire is low.
Description
Technical field
The invention belongs to the welding field in Materials Processing Engineering, more particularly to a kind of silicon toughening high-chromium cast iron-type self-insurance
Shield flux-cored wire and preparation method thereof.
Background technology
Built-up welding, as a kind of green manufacturing technique, is widely used in the reparation of all kinds of wear parts or remanufactures.Due to becoming
Basis is cheap to be easy to prepare, with M in addition7C3Type carbide (M=Cr, Fe) is that the rich chromium cast iron hardfacing alloy of wear-resisting skeleton obtains extensively
General application.Thick M in the hypereutectic tissue of rich chromium cast iron hardfacing alloy7C3Type carbide, on the one hand for improve wearability more have
, on the other hand itself easily metallurgical imperfection and micro-crack, fragility is very big in benifit, become hardfacing alloy under arms during
Develop into the major reason of macroscopic cracking or even cracking destruction.Therefore, overcome traditional high-chromium cast iron-type hardfacing alloy crack resistance
The defect of difference, is a hot subject developing technique for overlaying in recent years.
Generally adopt the method reducing 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；But reducing C and alloying element content, to also result in hardfacing alloy hard
Degree is decreased obviously, and wearability also cannot be ensured.
Content of the invention
Goal of the invention：For solving technical problem present in prior art, the present invention provides a kind of silicon toughening rich chromium cast iron
Type self-protection flux-cored wire and preparation method thereof.
Technology contents：For realizing above-mentioned technical purpose, the present invention proposes a kind of silicon toughening high-chromium cast iron-type self-shield medicated core
Welding wire, including mild-carbon steel strip and medicated core, in steel band, described drug core component weight/mass percentage composition scope is as follows for flux cored filler：
60～75% 80 mesh high carbon ferro-chromes, 12～16% 80 mesh ferrosilicon, 0.5～1% 60 mesh graphite, 1～2% 200 mesh stones
Ink, 1～5% 60 mesh ferro-borons, 1～3% 200 mesh ferro-borons, 1～2% 60 mesh almags, 1～2% 200 mesh magnaliums
Alloy, 1～2% 60 mesh manganese powders, 1～3% 200 mesh manganese powders, balance of 80 mesh iron powders, medicated core powder presses welding wire gross weight
52-56%.
Preferably, described high carbon ferro-chrome phosphorus content is 9～10wt%, chrome content is 60～70wt%, and remaining is ferrum；
Described ferrosilicon silicon content is 72～80wt%, and remaining is ferrum；Described ferro-boron boron content is 19～25wt%, and remaining is ferrum；
Described almag aluminum content is 47～53wt%, and remaining is magnesium.
Preferably, varigrained graphite in described medicated core：The graphite of 60 mesh and the graphite of 200 mesh, and with mass ratio 0.5
～1：The mode of 1～2 combination adds.
Preferably, varigrained ferro-boron in described medicated core：The graphite of 60 mesh and the ferro-boron of 200 mesh, and with mass ratio 1～
5：The mode of 1～3 combination adds.
Preferably, in described medicated core different-grain diameter almag：The almag of 60 mesh and the almag of 200 mesh,
And with mass ratio 1～2：The mode of 1～2 combination adds.
Preferably, in described medicated core different-grain diameter manganese powder：The manganese powder of 60 mesh and the manganese powder of 200 mesh, and with mass ratio 1～
2：The mode of 1～3 combination adds.
Preferably, in described medicated core, the particle diameter of high carbon ferro-chrome, ferrosilicon and iron powder component in described medicated core is equal to 80
Mesh.
Preferably, in described medicated core, described mild-carbon steel strip thickness × width is 0.5 × 21mm.
Preferably, in described medicated core, in a diameter of 2.8mm, 3.2mm, 3.5mm, 3.8mm and 4.2mm of described welding wire
Any one.
The preparation method of above-mentioned silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded, comprises the steps：
(1) using molding roller, mild steel steel band is rolled into U-shaped, then pass through dust feeder and medicated core powder is pressed the present invention
The 52-56% of welding wire gross weight is added in U-lag；
(2) U-lag is healed up, so that medicated core is wrapped up wherein, by wire drawing die, by road drawing, tube reducing, finally make it diameter of up to
To 2.8～4.2mm, obtain final products.
In above-mentioned medicated core, each component Main Function is as follows：
High carbon ferro-chrome：Transition alloy elements Cr in deposited metal, and C element is provided.
Ferrosilicon：Refinement M7C3Carbide, and form Fe3Si phase, solution strengthening matrix.
Ferro-boron：Deoxidation, reduces weld pool surface tension force, improves figuration of bead.
Graphite：There is provided C element, deoxidation forms CO, and reduces the partial pressure of oxygen in welding atmosphere and nitrogen partial pressure.
Almag：Deoxidation, fixed nitrogen, strengthen self-shield effect.
Manganese powder：Deoxidation, strengthens self-shield effect；Transition alloy elements Mn.
By the effect summary of each component in technique scheme and medicated core it is understood that the present invention is due to adding in medicated core
More large content of Si element, it is gathered among matrix in hardfacing alloy tissue, and is not present in M7C3In, to M7C3Carbon
Inhibition is played in the growth of compound so that M in high-chromium cast iron-type hardfacing alloy7C3Carbide becomes tiny and disperse, and this will
It is highly advantageous to and improves alloy ductility, improve its crack resistance.On the other hand, due to enough Si, the Fe in matrix combines to form
Fe3Si phase, also functions to certain invigoration effect.The first analysis M that built-up welding tissue is distributed by small and dispersed7C3Carbide, M3C carbide,
Fe3Si phase, the austenite of martensite and Si solution strengthening is constituted, and this microstructure is the base that hardfacing alloy has excellent wear
Plinth.
Additionally, the granularity of graphite, ferro-boron, almag and manganese powder all has two kinds in medicated core：60 mesh and 200 mesh, with granularity
The mode of difference combination is added.In whole welding process, in the molten drop stage of existing extreme temperatures, there is the slightly lower molten bath of temperature again
In the stage, whichever is required for being prevented effectively from air pollution and just can obtain qualified welding deposited metal in stage, and seminar passes through
The substantial amounts of engineer testing of early stage finds, can be obviously improved the self-shield effect of welding wire by varigrained above-mentioned medicated core component
Really.This is that varigrained powder has different oxidation activities.The new of chemical metallurgy reactivity is controlled by component particle size
Thinking, adds 200 superfine mesh graphite, ferro-boron, almag and manganese powder in medicated core, is carried out in the welding temperature rise period using it
Effectively precedent desoxydation, adds 60 thicker mesh graphite, almag and manganese powder in medicated core simultaneously, is allowed to be retained in molten drop height
Thermophase and molten bath stage are it is also possible to carry out effective deoxidation gas making, thus ensureing be heated, melt, being formed and melt in whole welding wire
Drip, the droplet transfer, formed molten bath and start solidify Welding Metallurgy whole process be provided with good self-shield effect, it is achieved thereby that
This welding wire, in the case of not adding any mineral powder slag former, remains able to possess good welding technological properties and welding
Metal surface shapes.Meanwhile, the interpolation of many granularities deoxidizer is it is ensured that under the adding conditional of less deoxidizer, obtain well certainly
Protected effect, is that enough interpolations of medicated core formula medium high carbon ferrochrome, ferrosilicon etc. create steric requirements.
Beneficial effect：The present invention passes through to the addition of more large content of Si element in medicated core, has effectively refined high chromium casting
First analysis M in swage hardfacing alloy7C3Carbide, and form the Fe playing certain invigoration effect3Si phase.Built-up welding is organized by tiny
The first analysis M of Dispersed precipitate7C3Carbide, M3C carbide, Fe3Si phase, the austenite of martensite and Si solution strengthening is constituted, this type
Tissue is very advantageous in the anti-wear performance of hardfacing alloy.Additionally, controlling the new of chemical metallurgy reactivity also by component particle size
Thinking, is respectively combined in medicated core and adds 200 superfine mesh and 60 thicker mesh graphite, ferro-boron, almag and manganese powder, effectively
Ensure be heated, melt, form molten drop, droplet transfer, form molten bath and start the Welding Metallurgy whole process solidifying all in whole welding wire
Possesses good self-shield effect, it is achieved thereby that this welding wire is not in the case of adding any mineral powder slag former, still
Can possess good welding technological properties and welding bead shaping surface.The flux-cored wire welding procedure performance of the present invention is good, alloy
Substantially, uniformly, preferably, average hardness is in 59～65HRC scope for toughness for overlay surface hardness for structure refinement.Wearability is Q235
30 times about.
Specific embodiment
According to following embodiments, the present invention may be better understood.However, the specific medicated core component described by embodiment
Proportioning, process conditions and its result are merely to illustrate the present invention, and should not also retouch in detail without limitation in claims
The present invention stating.Wherein, the high carbon ferro-chrome phosphorus content used in following examples be 9～10wt%, chrome content be 60～
70wt%, remaining is ferrum；Described ferrosilicon silicon content is 72～80wt%, and remaining is ferrum；Described ferro-boron boron content be 19～
25wt%, remaining is ferrum；Described almag aluminum content is 47～53wt%, and remaining is magnesium.
Embodiment 1
A kind of silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded, including mild-carbon steel strip and medicated 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 75g, the 80 mesh ferrosilicon of 12g, the 60 mesh graphite of 0.5g,
The 200 mesh graphite of 1g, the 60 mesh ferro-borons of 1g, the 200 mesh ferro-borons of 2g, the 60 mesh almags of 1g, the 200 mesh almags of 1g,
The 60 mesh manganese powders of 1.5g, the 200 mesh manganese powders of 1g, the 80 mesh iron powders of 4g.Taken various powder are inserted in mixed powder machine, mixes 40 points
Clock, then adds mixed-powder in the H08A carbon steel steel band groove of 21 × 0.5mm of U-shaped, filling rate is 52%.Again by U-lag
Heal up, so that medicated powder is wrapped up wherein.Then make it respectively by the wire drawing of a diameter of 4.2mm, 3.8mm, 3.5mm, 3.2mm, 2.8mm
One or more of mould, by road drawing, tube reducing, finally obtains the product of a diameter of 2.8～4.2mm.Welding current be 280～
420A, weldingvoltage is 30～42V, and speed of welding is 0.4m/min, and interlayer temperature controls 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 silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded, including mild-carbon steel strip and medicated 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 60g, the 80 mesh ferrosilicon of 16g, the 60 mesh graphite of 1g,
The 200 mesh graphite of 1.5g, the 60 mesh ferro-borons of 5g, the 200 mesh ferro-borons of 3g, the 60 mesh almags of 2g, the 200 mesh magnaliums of 1.5g close
Gold, the 60 mesh manganese powders of 2g, the 200 mesh manganese powders of 1.5g, the 80 mesh iron powders of 6.5g.Taken various powder are inserted in mixed powder machine, mixes
Close 40 minutes, then mixed-powder is added in the H08A carbon steel steel band groove of 21 × 0.5mm of U-shaped, filling rate is 56%.Again will
U-lag heals up, and so that medicated powder is wrapped up wherein.Then it is made to pass through a diameter of 4.2mm, 3.8mm, 3.5mm, 3.2mm, 2.8mm respectively
One or more of wire drawing die, by road drawing, tube reducing, finally obtain the product of a diameter of 2.8～4.2mm.Welding current
For 280～420A, weldingvoltage is 30～42V, and speed of welding is 0.4m/min, and interlayer temperature controls at 150～250 DEG C, heap
3 layers of weldering.Deposited metal hardness and wearability are shown in Table 1.
Embodiment 3
A kind of silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded, including mild-carbon steel strip and medicated 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 65g, the 80 mesh ferrosilicon of 15g, the 60 mesh graphite of 0.6g,
The 200 mesh graphite of 2g, the 60 mesh ferro-borons of 3g, the 200 mesh ferro-borons of 1.5g, the 60 mesh almags of 1.2g, the 200 mesh magnaliums of 1.8g
Alloy, the 60 mesh manganese powders of 1.6g, the 200 mesh manganese powders of 3g, the 80 mesh iron powders of 5.3g.Taken various powder are inserted in mixed powder machine,
Mixing 40 minutes, then adds mixed-powder in the H08A carbon steel steel band groove of 21 × 0.5mm of U-shaped, filling rate is 55%.Again
U-lag is healed up, so that medicated powder is wrapped up wherein.Then make its respectively pass through a diameter of 4.2mm, 3.8mm, 3.5mm, 3.2mm,
One or more of wire drawing die of 2.8mm, by road drawing, tube reducing, finally obtains the product of a diameter of 2.8～4.2mm.Welding
Electric current is 280～420A, and weldingvoltage is 30～42V, and speed of welding is 0.4m/min, and interlayer temperature controls 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 silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded, including mild-carbon steel strip and medicated 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 70g, the 80 mesh ferrosilicon of 13g, the 60 mesh graphite of 0.8g,
The 200 mesh graphite of 1.8g, the 60 mesh ferro-borons of 2g, the 200 mesh ferro-borons of 1g, the 60 mesh almags of 1.5g, the 200 mesh magnaliums of 2g close
Gold, the 60 mesh manganese powders of 1g, the 200 mesh manganese powders of 2g, the 80 mesh iron powders of 4.9g.Taken various powder are inserted in mixed powder machine, mixing
40 minutes, then mixed-powder is added in the H08A carbon steel steel band groove of 21 × 0.5mm of U-shaped, filling rate is 53%.Again by U
Shape groove heals up, and so that medicated powder is wrapped up wherein.Then it is made to pass through a diameter of 4.2mm, 3.8mm, 3.5mm, 3.2mm, 2.8mm respectively
One or more of wire drawing die, by road drawing, tube reducing, finally obtains the product of a diameter of 2.8～4.2mm.Welding current is
280～420A, weldingvoltage is 30～42V, and speed of welding is 0.4m/min, and interlayer temperature controls at 150～250 DEG C, built-up welding 3
Layer.Deposited metal hardness and wearability are shown in Table 1.
The beaten hardness of table 1 adopts HR-150A Rockwell apparatus, load 150Kg, and each test specimens is taken with 5 point hardnesses, meter
Calculate average hardness value.
Wear test adopts MLS-225 type wet type rubber foot wheel abrasion tester.
The overlay cladding of each embodiment is cut five a size of 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 turns 1000 turns, abrasive material：The quartz sand of 40～70 mesh.The anti-wear performance of deposited metal is with just
The weight loss of formula abrasion is weighing.Sample is inserted in the beaker filling acetone soln each experiment is forward and backward, clear in ultrasound wave
Wash in instrument and clean 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 being used for built-up welding sample of weight loss.
The each embodiment deposited metal hardness and wear resistance of table 1
The present invention passes through to the addition of more large content of Si element in medicated core, has effectively refined high-chromium cast iron-type heap seam
First analysis M in gold7C3Carbide, and form the Fe playing certain invigoration effect3Si phase.Built-up welding tissue is distributed by small and dispersed
First analyse M7C3Carbide, M3C carbide, Fe3Si phase, the austenite of martensite and Si solution strengthening is constituted, and this type tissue extremely has
Anti-wear performance beneficial to hardfacing alloy.Additionally, controlling the new approaches of chemical metallurgy reactivity also by component particle size, in medicated core
In be respectively combined and add superfine 200 mesh and 60 thicker mesh graphite, ferro-boron, almag and manganese powder, be effectively ensured whole
The Welding Metallurgy whole process that welding wire is heated, melts, forming molten drop, droplet transfer, formation molten bath and start to solidify is provided with good
Self-shield effect, it is achieved thereby that this welding wire is not in the case of adding any mineral powder slag former, remains able to possess good
Good welding technological properties and welding bead shaping surface.The flux-cored wire welding procedure performance of the present invention is good, and alloy structure refinement is bright
Aobvious, uniformly, preferably, in 59～65HRC scope, wearability is 30 times of left sides of Q235 to average hardness to toughness to overlay surface hardness
Right.
Claims (10)
1. a kind of silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded, including mild-carbon steel strip and medicated core, flux cored filler in steel band,
It is characterized in that, described drug core component weight/mass percentage composition scope is as follows：60～75% 80 mesh high carbon ferro-chromes, 12～16%
80 mesh ferrosilicon, 0.5～1% 60 mesh graphite, 1～2% 200 mesh graphite, 1～5% 60 mesh ferro-borons, the 200 of 1～3%
Mesh ferro-boron, 1～2% 60 mesh almags, 1～2% 200 mesh almags, 1～2% 60 mesh manganese powders, 1～3%
200 mesh manganese powders, balance of 80 mesh iron powders, medicated core powder presses the 52-56% of welding wire gross weight.
2. silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded according to claim 1 is it is characterised in that described high-carbon
Ferrochrome phosphorus content is 9～10wt%, and chrome content is 60～70wt%, and remaining is ferrum；Described ferrosilicon silicon content be 72～
80wt%, remaining is ferrum；Described ferro-boron boron content is 19～25wt%, and remaining is ferrum；Described almag aluminum content is
47～53wt%, remaining is magnesium.
3. according to claim 1 containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded it is characterised in that different grain
The graphite of degree：The graphite of 60 mesh and the graphite of 200 mesh, and with mass ratio 0.5～1：The mode of 1～2 combination adds.
4. according to claim 1 containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded it is characterised in that different grain
The ferro-boron of degree：The ferro-boron of 60 mesh and the ferro-boron of 200 mesh, and with mass ratio 1～5：The mode of 1～3 combination adds.
5. according to claim 1 containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded it is characterised in that different grain
The almag in footpath：The almag of 60 mesh and the almag of 200 mesh, and with mass ratio 1～2：The mode of 1～2 combination adds
Enter.
6. according to claim 1 containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded it is characterised in that different grain
The manganese powder in footpath：The manganese powder of 60 mesh and the manganese powder of 200 mesh, and with mass ratio 1～2：The mode of 1～3 combination adds.
7. according to claim 1 containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded it is characterised in that described medicine
The particle diameter of the high carbon ferro-chrome in core, ferrosilicon and iron powder component is equal to 80 mesh.
8. according to claim 1 containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded it is characterised in that described low
Carbon steel tape thickness × width is 0.5 × 21mm.
9. according to claim 1 containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded it is characterised in that described weldering
Any one in a diameter of 2.8mm, 3.2mm, 3.5mm, 3.8mm and 4.2mm of silk.
10. the preparation method containing silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded described in claim 1, its feature exists
In comprising the steps：
(1) using molding roller, mild steel steel band is rolled into U-shaped, then medicated core powder is pressed by welding wire gross weight by dust feeder
52-56% is added in U-lag；
(2) U-lag is healed up, so that medicated core is wrapped up wherein, by wire drawing die, by road drawing, tube reducing, so that its diameter is reached
2.8～4.2mm, obtains final products.
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| CN201610605420.1A CN106392361B (en) | 2016-07-28 | 2016-07-28 | A kind of silicon toughening High-chromium Cast Iron Flux Cored Wire For Self-shielded and preparation method thereof |
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