CN104708234B - Iron-based self-protection flux-cored wire, surfacing alloy manufactured with iron-based self-protection flux-cored wire and method for manufacturing iron-based self-protection flux-cored wire - Google Patents
Iron-based self-protection flux-cored wire, surfacing alloy manufactured with iron-based self-protection flux-cored wire and method for manufacturing iron-based self-protection flux-cored wire Download PDFInfo
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- CN104708234B CN104708234B CN201310676726.2A CN201310676726A CN104708234B CN 104708234 B CN104708234 B CN 104708234B CN 201310676726 A CN201310676726 A CN 201310676726A CN 104708234 B CN104708234 B CN 104708234B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/368—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
- B23K35/22—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
- B23K35/40—Making wire or rods for soldering or welding
- B23K35/406—Filled tubular wire or rods
-
- 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
- B23K9/00—Arc welding or cutting
Abstract
The invention belongs to the field of material machining and welding, and particularly relates to an iron-based self-protection flux-cored wire, a surfacing alloy manufactured with the iron-based self-protection flux-cored wire and a method for manufacturing the iron-based self-protection flux-cored wire. Flux-cored powder is wrapped by a carbon steel strip, and the mass percent of the flux-cored powder in the flux-cored wire ranges from 46 percent to 50 percent. The flux-cored powder comprises, by mass, 50 percent to 64 percent of high carbon ferro chrome, 5.5 percent to 11 percent of ferroboron, 1 percent to 6 percent of ferromolybdenum, 1 percent to 3 percent of electrolytic manganese powder, 3 percent to 8 percent of ferrosilicon, 2 percent to 7 percent of graphite, and the balanced reduced iron powder. According to setting of welding process parameters, the voltage ranges from 30 V to 35 V, the current ranges from 320 V to 380 V, the feeding speed ranges from 430 mm/min to 500 mm/min, and the length of the part, stretching out of a contact tube, of the flux-cored wire ranges from 15 mm to 30 mm. The number of chromium elements in the iron-based self-protection flux-cored wire is lower than that of chromium elements in a traditional grinding roller surfacing welding wire, so that the iron-based self-protection flux-cored wire is an environmentally-friendly welding material; and meanwhile the iron-based self-protection flux-cored wire has the high hardness and high wear resistance, and is good in surfacing welding manufacturability and attractive in formation of weld.
Description
Technical field
The invention belongs to materials processing field of welding material, particularly to a kind of iron-based self-protection flux-cored wire and its made
Standby hardfacing alloy and method.
Background technology
The mill roll sleeve of coal pulverizer and mill lining tile are one of power plant's workpiece easy to wear, with the demand of modern power consumption
Increase, power plant load is increasing, the manufacture of these workpiece easy to wear and reparation problem are more and more prominent.Typically there are two kinds at present
Manufacture method, a kind of is entirety or piecemeal another kind by the way of rich chromium cast iron casting is to be carried out by the way of cast steel built-up welding
Produce.The workpiece of casting and built-up welding can be repaired original size by the way of flux-cored wire built-up welding upon wear and continue
Use.
At present, the widely used flux-cored wire of coal-grinding roller Bead weld repair is mainly the medicated core weldering based on high ferrochrome based alloy
Silk, it is wear-resisting that this kind of resurfacing welding material improves wearing layer by the substantial amounts of carbon of addition and chromium formation carbide hard phase
Property, but when flux-cored wire kind carbon content >=5% easily causes the deterioration of welding procedure, splashing particle size becomes big, and quantity becomes many, weldering
The type that is seamed into is deteriorated, and reduces welding efficiency.Meanwhile, in flux-cored wire the addition of a large amount of chromiums so that meeting in welding process
Produce substantial amounts of flue dust and toxic gas, pollution is produced to environment.Therefore, part chromium is replaced to strengthen with boron, molybdenum element
Matrix, thus improving the wearability of wearing layer, has adapted to the environmental protection concept of environment sustainable development.
Content of the invention
The technical problem to be solved is to provide a kind of coal pulverizer abrasion-proof overlaying welding flux-cored wire, for the row that generates electricity
Large-scale coal-grinding equipment (coal-grinding roller, mill etc.) in industry in the case of long abrasive wear, the surface of parts often by
Scrap inefficacy in abrasion, need periodically coal-grinding equipment to be changed and maintenance surface, adapt to power plant large-scale coal-grinding equipment
Low stress abrasive wear working condition, have high-hardness, wearable self-shield effect, reduce existing welding material simultaneously and exist
Pollution problem to environment during use.
Not enough for prior art, the invention provides a kind of iron-based self-protection flux-cored wire and its prepared heap seam
Gold and method.
A kind of coal-grinding roller iron-based self protection pile-up welding flux core welding wire, described flux-cored wire wraps up medicated core powder by carbon steel steel band
Constitute, wherein mass fraction in flux-cored wire for the medicated core powder is 46%-50%, and in described medicated core powder, each component and quality are divided
Number is as follows：High carbon ferro-chrome：50%-64%；Ferro-boron：5.5%-11%；Molybdenum-iron：1%-6%；Electrolytic manganese powder：1%-3%；Ferrosilicon：3%-8%；Stone
Ink：2%-7%, remaining composition is reduced iron powder.
The preparation method of described flux-cored wire is as follows：
A, roll carbon steel steel band so as to form U-lag, then add in gained U-lag and account for prepared flux-cored wire gross weight
The medicated core powder of 46%-50%；
B, U-lag is healed up, so that medicated core powder is wrapped in carbon steel steel band, by wire drawing die, by road drawing, tube reducing,
After make its diameter reach 2.8mm, obtain final products.
A kind of M containing Dispersed precipitate is prepared with iron-based self protection pile-up welding flux core welding wire using a kind of coal-grinding roller7C3、Fe2B hard
The method of the iron-based abrasion resistant overlaying-welding alloy of phase, it comprises the following steps that：
（1）Prepare medicated core powder according to flux-cored wire, together roll with carbon steel steel band, obtain flux-cored wire；
（2）Hardfacing alloy is prepared using direct-current arc Welding.
Described electronic arc welding technological parameter is：Voltage：30V-35V；Electric current：320A-380A；Wire feed rate：430mm/
min-500mm/min；Welding wire stretches out the length of ignition tip：15mm-30mm.
In the hardfacing alloy being obtained, each component and mass fraction are as follows：C：3%-5%；Cr：16%-22%；Mo：0.4%-
1.8%；B：0.4%-1.3%；Mn：0.9%-2.1%；Si：0.4%-1.6%；Remaining composition is Fe.
The each component of medicated core powder in the flux-cored wire being adopted and mass fraction are preferably as follows：High carbon ferro-chrome：52%-
62%；Ferro-boron：6%-10%；Molybdenum-iron：1.5%-5%；Electrolytic manganese powder：1.5%-2.5%；Ferrosilicon：4%-7.5%；Graphite：2.5%-6.5%,
Remaining composition is reduced iron powder；In the hardfacing alloy being obtained, each component and mass fraction are as follows：C：3.5%-4.5%；Cr：17%-
21%；Mo：0.5%-1.5%；B：0.5%-1.2%；Mn：1.0%-2.0%；Si：0.5%-1.5%；Remaining composition is Fe.
The each component of medicated core powder in the flux-cored wire being adopted and mass fraction are further preferably as follows：High carbon ferro-chrome：
55%-60%；Ferro-boron：6.5%-9%；Molybdenum-iron：2%-4%；Electrolytic manganese powder：1.75%-2.45%；Ferrosilicon：5%-7%；Graphite：3%-6%, its
Remaining composition is reduced iron powder；In the hardfacing alloy being obtained, each component and mass fraction are as follows：C：4%-4.25%；Cr：18%-
20.5%；Mo：0.6%-1.4%；B：0.6%-1.1%；Mn：1.1%-1.9%；Si：0.6%-1.4%；Remaining composition is Fe.
In described medicated core powder, various component effects are as follows：
High carbon ferro-chrome：It is the main source of carbon and chromium in weld metal, be the essential condition generating a large amount of primary carbides,
It is the guarantee of high rigidity and high-wearing feature.In the design of resurfacing welding material, carbon is most important intensified element, and it is solid that carbon has gap
The effect of molten strengthening, increases the content of the carbon in material, it will increase carbide quantity, obtains high hardness.In matrix
It is dispersed with substantial amounts of primary carbide M7C3So that surfacing layer metal hardness is high, wearability is good.
Ferro-boron：To weld metal transition boron element, primarily to obtaining the boride of high rigidity, thus improving heap seam
The wearability of gold.Hardfacing alloy hardness and relative wear resistance improve with the increase of Boron contents, but Boron contents are too high easily causes
" boron is crisp ", reduces Wear Resistance, and therefore the present invention designs the ferro-boron content adding in flux-cored wire is 5.5wt.%-11wt.%.
Molybdenum-iron：Molybdenum is generally present in solid solution phase or Carbide Phases in the alloy.Molybdenum forms compound oozing with ferrum and carbon
Carbon body, meanwhile, molybdenum also has the dissolubility slowing down carbide in austenite, effectively suppression cementite at high temperature poly-
Collection, promote disperse the precipitation of alloy carbide the effects such as, thus serving good invigoration effect in the alloy.
Electrolytic manganese powder, ferrosilicon：Using manganese silicon combined deoxidation, improve transfer coefficient of element.
Graphite：Graphite main component is free carbon, mainly makes up the deficiency of carbon in alloying component, and carbon has gap solid solution
The effect of strengthening, promotes the formation of twin crystal martensite, increases carbide quantity, reduces carbonization material dot spacing high hard to obtain
Degree.Additionally, flake graphite is more beneficial for stablizing of welding arc, reduces and splash.
Reduced iron powder：Fill up surplus.
Coal-grinding roller hardfacing alloy adopts non gas shielded welding technique to prepare, and according to coal-grinding roller working condition requirement, welding current selects
320A-380A；Voltage 30V-35V；Wire feed rate：430mm/min-500mm/min；Welding wire stretches out the length of ignition tip：15mm-
30mm.The wearing layer hardfacing alloy layer meeting coal-grinding roller working condition requirement can be prepared using this technological parameter.
Beneficial effects of the present invention are：
1st, reduce the use of chromium, decrease the pollution to environment, be a kind of environmentally friendly welding material；
2nd, adopt the alloy structure of flux-cored wire built-up welding of the present invention uniformly, the M7C3 hard phase of formation and Fe2B hard phase are more
Scattered is distributed on matrix, thus ensure that the combination property of high-wearing feature；
3rd, bead-welding technology is good：Splash in welding process little, appearance of weld is attractive in appearance.
Brief description
Fig. 1 is the metallographic microstructure figure after 500 times of hardfacing alloy amplification in the embodiment of the present invention 3；
Fig. 2 is hardfacing alloy relative wear resistance Changing Pattern figure in the embodiment of the present invention 3.
Specific embodiment
The invention provides a kind of iron-based self-protection flux-cored wire and its prepared hardfacing alloy and method, with reference to
The present invention will be further described for the drawings and specific embodiments.
In each embodiment, same section is as described below：
1st, in embodiment, flux-cored wire crust selects specification is 16mm × 0.3mm（Width is 16mm, and thickness is 0.3mm）'s
SPCC carbon steel steel band, flux for flux-cored wire composition illustrates in an embodiment, and selected various drug core component powder cross 60 respectively
Mesh sieve, selected various drug core component powder is put into and mixes in mixed powder machine 2 hours, then the medicated core obtaining powder is added U
In the steel band groove of shape, U-lag is healed up, so that medicated powder is wrapped up wherein.Then respectively through wire drawing die, by road drawing, tube reducing, finally
Make its diameter reach 2.8mm, obtain coal-grinding roller flux-cored wire.
2nd, during welding wire built-up welding, technological parameter is all set as：Voltage：30V-35V；Electric current：320A-380A；Wire feed speed
Degree：430mm/min-500mm/min；Welding wire stretches out the length of ignition tip：15mm-30mm.
Embodiment 1
Take 5 kilograms of high carbon ferro-chrome, 0.55 kilogram of ferro-boron, 0.1 kilogram of molybdenum-iron, 0.1 kilogram of electrolytic manganese powder, 0.3 kilogram of ferrosilicon,
0.2 kilogram of graphite, 3.75 kilograms of reduced iron powder.The medicated core obtaining powder is added in the steel band groove of U-shaped, U-lag is healed up, obtains
To the coal-grinding roller flux-cored wire of a diameter of 2.8mm, filling rate is 48%, prepares hardfacing alloy by above-mentioned technique, is obtained
In hardfacing alloy, each composition and mass fraction are respectively：C：3%；Cr：16%；Mo：0.4%；B：0.4%；Mn：0.9%；Si：0.4%；
Remaining composition is Fe.
Embodiment 2
Take 5.2 kilograms of high carbon ferro-chrome, 0.6 kilogram of ferro-boron, 0.15 kilogram of molybdenum-iron, 0.15 kilogram of electrolytic manganese powder, ferrosilicon 0.4 thousand
Gram, 0.25 kilogram of graphite, 3.25 kilograms of reduced iron powder.The medicated core obtaining powder is added in the steel band groove of U-shaped, U-lag is closed
Mouthful, obtain the coal-grinding roller flux-cored wire of a diameter of 2.8mm, filling rate is 48%, prepares hardfacing alloy by above-mentioned technique, institute
In the hardfacing alloy obtaining, each composition and mass fraction are respectively：C：3.5%；Cr：17%；Mo：0.5%；B：0.5%；Mn：1.0%；
Si：0.5%；Remaining composition is Fe.
Embodiment 3
Take 5.5 kilograms of high carbon ferro-chrome, 0.65 kilogram of ferro-boron, 0.2 kilogram of molybdenum-iron, 0.175 kilogram of electrolytic manganese powder, ferrosilicon 0.5
Kilogram, 0.3 kilogram of graphite, 2.675 kilograms of reduced iron powder.The medicated core obtaining powder is added in the steel band groove of U-shaped, by U-lag
Heal up, obtain the coal-grinding roller flux-cored wire of a diameter of 2.8mm, filling rate is 48%, prepares hardfacing alloy by above-mentioned technique,
In the hardfacing alloy being obtained, each composition and mass fraction are respectively：C：4%；Cr：18%；Mo：0.6%；B：0.6%；Mn：1.1%；
Si：0.6%；Remaining composition is Fe.
Embodiment 4
Take 6 kilograms of high carbon ferro-chrome, 0.9 kilogram of ferro-boron, 0.4 kilogram of molybdenum-iron, 0.245 kilogram of electrolytic manganese powder, ferrosilicon 0.7 thousand
Gram, 0.6 kilogram of graphite, 1.155 kilograms of reduced iron powder.The medicated core obtaining powder is added in the steel band groove of U-shaped, U-lag is closed
Mouthful, obtain the coal-grinding roller flux-cored wire of a diameter of 2.8mm, filling rate is 48%, prepares hardfacing alloy by above-mentioned technique, institute
In the hardfacing alloy obtaining, each composition and mass fraction are respectively：C：4.25%；Cr：20.5%；Mo：1.4%；B：1.1%；Mn：
1.9%；Si：1.4%；Remaining composition is Fe.
Embodiment 5
Take 6.2 kilograms of high carbon ferro-chrome, 1 kilogram of ferro-boron, 0.5 kilogram of molybdenum-iron, 0.25 kilogram of electrolytic manganese powder, ferrosilicon 0.75 thousand
Gram, 0.65 kilogram of graphite, 0.65 kilogram of reduced iron powder.The medicated core obtaining powder is added in the steel band groove of U-shaped, U-lag is closed
Mouthful, obtain the coal-grinding roller flux-cored wire of a diameter of 2.8mm, filling rate is 48%, prepares hardfacing alloy by above-mentioned technique, institute
In the hardfacing alloy obtaining, each composition and mass fraction are respectively：C：4.5%；Cr：21%；Mo：1.5%；B：1.2%；Mn：2.0%；
Si：1.5%；Remaining composition is Fe.
Embodiment 6
Take 6.4 kilograms of high carbon ferro-chrome, 1.1 kilograms of ferro-boron, 0.6 kilogram of molybdenum-iron, 0.3 kilogram of electrolytic manganese powder, ferrosilicon 0.8 thousand
Gram, 0.7 kilogram of graphite, 0.1 kilogram of reduced iron powder.The medicated core obtaining powder is added in the steel band groove of U-shaped, U-lag is healed up,
Obtain the coal-grinding roller flux-cored wire of a diameter of 2.8mm, filling rate is 48%, prepares hardfacing alloy by above-mentioned technique, is obtained
Hardfacing alloy in each composition and mass fraction be respectively：C：4.5%；Cr：22%；Mo：1.5%；B：1.2%；Mn：2.0%；Si：
1.5%；Remaining composition is Fe.
Hardfacing alloy performance detection prepared by each embodiment is as described below：
1. as follows to example hardfacing alloy deposited metal hardness test：
Table 1 is Rockwell hardness number, and described hardness is all tested using HR～150A Rockwell hardness machine, and load is 150Kg,
Average after making a call to five points.
The each embodiment hardfacing alloy deposited metal hardness number of table 1（HRC）
2. pair hardfacing alloy prepared by each example carries out wear-resistant experiment, using the wheeled abrasive particle of MLS-225 type damp sand rubber
Abrasion tester is carried out.Wear specimens a size of 57mm × 25.5mm × 6mm, test parameterss are as follows：Rubber wheel speed：240r/
min；Rubber wheel diameter：178mm；Rubber wheel hardness：60 (continue that hardness)；Load 100N；Rubber wheel revolution：1000 turns of pre-grinding,
Fine grinding 3000 turns, abrasive material：Granularity 40-70 mesh quartz sand.Material wear-resistant performance is weighed with the weight loss of abrasion.Before experiment,
Afterwards, sample is put in the beaker filling acetone soln, in ultrasonic washing instrument, clean 3-5 minute, with 45 quenchings in experiment
Steel sample as a comparison, numbering is embodiment 0.Contrast piece weight loss is used for the relative resistance to of this formula with measuring piece weight loss
Mill property.
Embodiment 0-6 gained hardfacing alloy relative wear resistance Changing Pattern experimental result is as shown in Figure 2.
Claims (9)
1. a kind of coal-grinding roller with iron-based self protection pile-up welding flux core welding wire it is characterised in that：Described flux-cored wire is by carbon steel steel band bag
Wrap up in medicated core powder to constitute, wherein mass fraction in flux-cored wire for the medicated core powder is 46%-50%, each in described medicated core powder
Component and mass fraction are as follows：High carbon ferro-chrome：50%-64%；Ferro-boron：5.5%-11%；Molybdenum-iron：1%-6%；Electrolytic manganese powder：
1%-3%；Ferrosilicon：3%-8%；Graphite：2%-7%, remaining composition is reduced iron powder.
2. a kind of coal-grinding roller according to claim 1 with iron-based self protection pile-up welding flux core welding wire it is characterised in that：Described medicine
Carbon steel steel band used by core welding wire crust is SPCC carbon steel steel band.
3. a kind of coal-grinding roller according to claim 1 with iron-based self protection pile-up welding flux core welding wire it is characterised in that：Described
In medicated core powder, each component and mass fraction are as follows：High carbon ferro-chrome：52%-62%；Ferro-boron：6%-10%；Molybdenum-iron：1.5%-
5%；Electrolytic manganese powder：1.5%-2.5%；Ferrosilicon：4%-7.5%；Graphite：2.5%-6.5%, remaining composition is reduced iron powder.
4. a kind of coal-grinding roller according to claim 1 with iron-based self protection pile-up welding flux core welding wire it is characterised in that：Described
In medicated core powder, each component and mass fraction are as follows：High carbon ferro-chrome：55%-60%；Ferro-boron：6.5%-9%；Molybdenum-iron：2%-
4%；Electrolytic manganese powder：1.75%-2.45%；Ferrosilicon：5%-7%；Graphite：3%-6%, remaining composition is reduced iron powder.
5. adopt a kind of coal-grinding roller iron-based self protection pile-up welding flux core welding wire to prepare a kind of M containing Dispersed precipitate7C3、Fe2B hard phase
Iron-based abrasion resistant overlaying-welding alloy method it is characterised in that comprising the following steps that：
(1) prepare medicated core powder according to flux-cored wire, together roll with carbon steel steel band, obtain flux-cored wire；
(2) hardfacing alloy is prepared using direct-current arc Welding；
In the flux-cored wire being adopted, each component of medicated core powder and mass fraction are as follows：High carbon ferro-chrome：50%-64%；Ferro-boron：
5.5%-11%；Molybdenum-iron：1%-6%；Electrolytic manganese powder：1%-3%；Ferrosilicon：3%-8%；Graphite：2%-7%, remaining composition is
Reduced iron powder；
In the hardfacing alloy being obtained, each component and mass fraction are as follows：C：3%-5%；Cr：16%-22%；Mo：0.4%-
1.8%；B：0.4%-1.3%；Mn：0.9%-2.1%；Si：0.4%-1.6%；Remaining composition is Fe.
6. method according to claim 5 is it is characterised in that the comprising the following steps that of described step (1)：
A, roll carbon steel steel band so as to form U-lag, then add in gained U-lag and account for prepared flux-cored wire gross weight 46%-
50% medicated core powder；
B, U-lag is healed up, so that medicated core powder is wrapped in carbon steel steel band, by wire drawing die, by road drawing, tube reducing, finally make
Its diameter reaches 2.8mm, obtains final products.
7. method according to claim 5 it is characterised in that：Described electronic arc welding technological parameter is：Voltage：30V-
35V；Electric current：320A-380A；Wire feed rate：430mm/min-500mm/min；Welding wire stretches out the length of ignition tip：15mm-
30mm.
8. using the preparation of claim 5 methods described hardfacing alloy it is characterised in that medicated core powder in the flux-cored wire that adopted
The each component in end and mass fraction are as follows：High carbon ferro-chrome：52%-62%；Ferro-boron：6%-10%；Molybdenum-iron：1.5%-5%；Electrolytic manganese
Powder：1.5%-2.5%；Ferrosilicon：4%-7.5%；Graphite：2.5%-6.5%, remaining composition is reduced iron powder；
In the hardfacing alloy being obtained, each component and mass fraction are as follows：C：3.5%-4.5%；Cr：17%-21%；Mo：
0.5%-1.5%；B：0.5%-1.2%；Mn：1.0%-2.0%；Si：0.5%-1.5%；Remaining composition is Fe.
9. using the preparation of claim 5 methods described hardfacing alloy it is characterised in that medicated core powder in the flux-cored wire that adopted
The each component in end and mass fraction are as follows：High carbon ferro-chrome：55%-60%；Ferro-boron：6.5%-9%；Molybdenum-iron：2%-4%；Electrolytic manganese
Powder：1.75%-2.45%；Ferrosilicon：5%-7%；Graphite：3%-6%, remaining composition is reduced iron powder；
In the hardfacing alloy being obtained, each component and mass fraction are as follows：C：4%-4.25%；Cr：18%-20.5%；Mo：
0.6%-1.4%；B：0.6%-1.1%；Mn：1.1%-1.9%；Si：0.6%-1.4%；Remaining composition is Fe.
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| CN105537797B (en) * | 2015-11-27 | 2017-12-05 | 湘潭大学 | One kind control high boron flux-cored wire of carbon toughening type self-shield open arc |
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