CN110539103A - Open arc self-protection flux-cored wire for surfacing of continuous casting roller at horizontal section of continuous casting machine and manufacturing method thereof - Google Patents
Open arc self-protection flux-cored wire for surfacing of continuous casting roller at horizontal section of continuous casting machine and manufacturing method thereof Download PDFInfo
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- CN110539103A CN110539103A CN201910930361.9A CN201910930361A CN110539103A CN 110539103 A CN110539103 A CN 110539103A CN 201910930361 A CN201910930361 A CN 201910930361A CN 110539103 A CN110539103 A CN 110539103A
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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
- B23K35/02—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
- B23K35/24—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
- B23K35/3066—Fe as the principal constituent with Ni as next major 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
- B23K35/40—Making wire or rods for soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Nonmetallic Welding Materials (AREA)
Abstract
An open arc self-protection flux-cored wire for overlaying welding of a continuous casting roller at the horizontal section of a continuous casting machine comprises powder and a low-carbon steel strip. The powder accounts for 36-40% of the total weight of the welding wire, and the powder comprises the following components in percentage by mass: 3.2-4.5% of metallic nickel powder, 0.8-1.8% of ferromolybdenum, 0.4-0.7% of ferrovanadium, 0.3-0.8% of ferroniobium, 18-24% of micro-carbon ferrochromium, 1.2-2.1% of chromium nitride, 0.8-1.7% of 45# ferrosilicon, 1.8-3.2% of electrolytic manganese, 0.2-0.66% of sodium fluoroaluminate, 0.8-2.1% of dolomite, 3.5-7.5% of rutile, 1.5-3.9% of fluorite, 0.5-1.1% of aluminum powder, 0.25-0.42% of magnesium powder and the balance of iron powder. The basic material is a cold-rolled low-carbon steel strip, and the carbon content is 0.05-0.08%. The invention has the beneficial effects that: the welding process has excellent performance, beautiful shape and less splashing, the metal of the overlaying layer is chromium, nickel, molybdenum, vanadium and niobium low-carbon alloy, the high-temperature strength is high, and the oxidation resistance and the wear resistance are excellent.
Description
Technical Field
The invention belongs to the technical field of surfacing welding, and particularly relates to an open arc self-protection flux-cored wire for surfacing welding of a horizontal-section continuous casting roller and a preparation method thereof.
Background
The continuous casting roll is a main consumable part in continuous casting equipment, and the service life of the continuous casting roll directly determines the cost and the production continuity of a continuous casting process, so that the research on advanced surfacing materials to prolong the service life of the continuous casting roll is of great significance. The continuous casting roll comprises a foot roll, a supporting guide roll, a bending section continuous casting roll, an arc section continuous casting roll, a straightening section continuous casting roll and a horizontal section continuous casting roll. The horizontal continuous casting roll supports a solidified high-temperature casting blank, bending deformation is easy to occur when the solidified high-temperature casting blank bears larger mechanical force, and meanwhile, the iron oxide scale on the surface of the casting blank rolls the roll surface to easily cause serious abrasion, so the failure modes of the horizontal continuous casting roll are bending deformation, roll surface cracking and abrasion.
The traditional horizontal segment continuous casting roller manufacturing method is to weld Cr13 series martensitic stainless steel on the surface of a roller blank by submerged arc surfacing, but due to the defects of insufficient high-temperature strength, low wear resistance and limitation of a submerged arc surfacing process, the conditions of bending deformation, cracking and peeling, serious abrasion and the like are easy to occur in the using process, and the service life of the roller is seriously shortened.
Compared with submerged arc welding, open arc surfacing welding has the main characteristics of less heat input quantity to a workpiece, small workpiece deformation degree, simpler welding process, no need of heat treatment before and after welding, energy conservation, high deposition efficiency, strong stability and uniform hardness of a deposition layer. Therefore, the adoption of the open arc self-protection process for surfacing of the continuous casting roller is a development trend of manufacturing and repairing of the continuous casting roller in the future.
Disclosure of Invention
In view of the problems of the surfacing of the prior horizontal continuous casting roller, a surfacing material with higher high-temperature strength, high-temperature oxidation resistance and wear resistance is selected. The invention aims to develop an open arc self-protection flux-cored wire for overlaying a horizontal segment continuous casting roller and a preparation method thereof so as to prolong the service life of the horizontal segment continuous casting roller.
The technical scheme adopted by the invention is as follows:
An open arc self-protection flux-cored wire for overlaying welding of a continuous casting roller at the horizontal section of a continuous casting machine comprises powder and a low-carbon steel strip. The powder accounts for 36-40% of the total weight of the welding wire, and the powder comprises the following components in percentage by mass: 3.2-4.5% of metallic nickel powder, 0.8-1.8% of ferromolybdenum, 0.4-0.7% of ferrovanadium, 0.3-0.8% of ferroniobium, 18-24% of micro-carbon ferrochromium, 1.2-2.1% of chromium nitride, 0.8-1.7% of 45# ferrosilicon, 1.8-3.2% of electrolytic manganese, 0.2-0.66% of sodium fluoroaluminate, 0.8-2.1% of dolomite, 3.5-7.5% of rutile, 1.5-3.9% of fluorite, 0.5-1.1% of aluminum powder, 0.25-0.42% of magnesium powder and the balance of iron powder. The basic material is a cold-rolled low-carbon steel strip, and the carbon content is 0.05-0.08%.
The nickel powder provides Ni element for the surfacing welding cladding layer, Ni can expand a gamma region, a stable martensite structure of the cladding layer can be ensured even if the content of C is very low, and meanwhile, Ni can improve the tempering resistance of martensite and increase the high-temperature toughness of the martensite. The molybdenum iron contains 55-60% of Mo, and provides Mo element for the surfacing welding cladding layer, and mainly improves the tempering stability and the high-temperature strength. The V content of the ferrovanadium is 48-55%, the V element is transited to the surfacing welding cladding layer, the amount of vanadium carbonitride which is dispersed and precipitated is increased, and therefore the strength is improved. The Nb content of the ferrocolumbium is 62-66%, Nb elements are provided for the surfacing welding cladding layer, the precipitation of niobium carbonitride is mainly increased, and the high-temperature strength and the wear resistance are improved. The micro-carbon ferrochrome is used for transferring Cr and C to a surfacing welding cladding layer, the carbon content is 0.06-0.08%, the chromium content is 65-68%, and Cr has the function of forming Cr nitride on the surface at high temperature so as to improve the oxidation resistance and improve the strength and hardness of the surfacing welding layer. Chromium nitride containing 60% Cr and 5.2% N, which mainly provides Cr and N to the cladding layer metal. The Si and Mn elements in the Si-Fe and electrolytic manganese contribute to deoxidation and transition a certain amount of Si and Mn to the cladding layer. The rest ore powder materials such as sodium fluoroaluminate, dolomite, rutile, fluorite, aluminum powder, magnesium powder and the like mainly play roles in arc stabilization, slagging and gas making.
The diameter of the flux-cored wire is 2.4 mm.
The preparation method of the flux-cored wire comprises the following steps:
1. Mixing the medicinal powders according to the mass percentage to obtain mixed medicinal powders, mixing and stirring for 30-50 minutes, and then putting into a furnace for drying, wherein the drying temperature is 300-350 ℃, and the drying time is 3-5 hours.
2.0.3 mm 16mm low carbon stainless steel band is washed, dried and rolled into U shape.
3. And filling powder into the U-shaped groove, wherein the powder accounts for 36-40% of the total weight of the welding wire.
And 4, rolling the U-shaped groove into a circular shape, and continuously rolling and drawing to reduce the diameter to finally obtain the welding wire with the diameter of 2.4, namely the open arc self-protection flux-cored wire for overlaying welding of the continuous casting roller at the horizontal section of the continuous casting machine.
Compared with the prior art, the invention has the beneficial effects that: the open arc self-protecting flux-cored wire for overlaying welding of the continuous casting roller at the horizontal section of the continuous casting machine has the advantages of excellent welding process performance, attractive forming and less splashing, and the metal of the overlaying welding layer is chromium, nickel, molybdenum, vanadium and niobium low-carbon alloy, so that the high-temperature strength is high, and the oxidation resistance and the wear resistance are excellent.
Detailed Description
The following examples further illustrate embodiments of the present invention.
Example 1: 3.6kg of metallic nickel powder, 0.9kg of ferromolybdenum, 0.4kg of ferrovanadium, 0.4kg of ferroniobium, 20kg of micro-carbon ferrochrome, 1.3kg of chromium nitride, 1.2kg of 45# ferrosilicon, 1.9kg of electrolytic manganese, 0.21kg of sodium fluoroaluminate, 1.4kg of dolomite, 4.5kg of rutile, 1.8kg of fluorite, 0.65kg of aluminum powder, 0.3kg of magnesium powder and 0.5kg of iron powder are fully mixed and stirred for 30 minutes, and then the mixture is put into a furnace to be dried, wherein the powder drying temperature is 320 ℃, and the time is 3 hours. The powder is wrapped by a low-carbon stainless steel with the thickness of 0.3mm multiplied by 16mm, a steel belt is washed, dried and rolled into a U shape, and then the powder is filled into the steel belt, wherein the filling rate is 39%. And rolling the U-shaped groove into a circular shape, and then continuously rolling and drawing and reducing to obtain the finished welding wire with the diameter of 2.4.
Example 2: 3.8kg of metallic nickel powder, 1.1kg of ferromolybdenum, 0.5kg of ferrovanadium, 0.4kg of ferroniobium, 19kg of micro-carbon ferrochrome, 1.2kg of chromium nitride, 1.2kg of 45# ferrosilicon, 1.8kg of electrolytic manganese, 0.21kg of sodium fluoroaluminate, 1.5kg of dolomite, 4.6kg of rutile, 1.6kg of fluorite, 0.65kg of aluminum powder, 0.3kg of magnesium powder and 0.5kg of iron powder are fully mixed and stirred for 30 minutes, and then the mixture is put into a furnace to be dried, wherein the powder drying temperature is 320 ℃, and the time is 3 hours. The powder is wrapped by a low-carbon stainless steel with the thickness of 0.3mm multiplied by 16mm, a steel belt is washed, dried and rolled into a U shape, and then the powder is filled into the steel belt, wherein the filling rate is 38%. And rolling the U-shaped groove into a circular shape, and then continuously rolling and drawing and reducing to obtain the finished welding wire with the diameter of 2.4.
Example 3: 4.0kg of metallic nickel powder, 0.9kg of ferromolybdenum, 0.5kg of ferrovanadium, 0.5kg of ferroniobium, 21kg of micro-carbon ferrochrome, 1.2kg of chromium nitride, 1.2kg of 45# ferrosilicon, 1.8kg of electrolytic manganese, 0.4kg of sodium fluoroaluminate, 1.4kg of dolomite, 4.8kg of rutile, 1.8kg of fluorite, 0.5kg of aluminum powder and 0.3kg of magnesium powder are fully mixed and stirred for 30 minutes and then put into a furnace for drying, and the powder drying temperature is 320 ℃ for 3 hours. Coating the powder with 0.3mm × 16mm low-carbon stainless steel, cleaning, oven drying, rolling into U-shape, and filling the powder with a filling rate of 40%. And rolling the U-shaped groove into a circular shape, and then continuously rolling and drawing and reducing to obtain the finished welding wire with the diameter of 2.4.
Example 4: 3.5kg of metallic nickel powder, 0.9kg of ferromolybdenum, 0.5kg of ferrovanadium, 0.4kg of ferroniobium, 20kg of micro-carbon ferrochrome, 1.5kg of chromium nitride, 1.1kg of 45# ferrosilicon, 1.9kg of electrolytic manganese, 0.3kg of sodium fluoroaluminate, 1.4kg of dolomite, 4.8kg of rutile, 1.8kg of fluorite, 0.65kg of aluminum powder, 0.3kg of magnesium powder and 0.5kg of iron powder are fully mixed and stirred for 30 minutes, and then the mixture is put into a furnace to be dried, wherein the powder drying temperature is 320 ℃, and the time is 3 hours. The powder is wrapped by a low-carbon stainless steel with the thickness of 0.3mm multiplied by 16mm, the steel strip is washed, dried and rolled into a U shape, and then the powder is filled into the U-shaped steel strip, wherein the filling rate is 39.5 percent. And rolling the U-shaped groove into a circular shape, and then continuously rolling and drawing and reducing to obtain the finished welding wire with the diameter of 2.4.
Example 5: 3.2kg of metallic nickel powder, 0.8kg of ferromolybdenum, 0.5kg of ferrovanadium, 0.4kg of ferroniobium, 20.5kg of micro-carbon ferrochromium, 1.2kg of chromium nitride, 1.2kg of 45# ferrosilicon, 1.8kg of electrolytic manganese, 0.25kg of sodium fluoroaluminate, 1.2kg of dolomite, 4.6kg of rutile, 1.8kg of fluorite, 0.65kg of aluminum powder, 0.35kg of magnesium powder and 0.5kg of iron powder are fully mixed and stirred for 30 minutes and then put into a furnace for drying, and the drying temperature is 320 ℃ for 3 hours. The powder is wrapped by a low-carbon stainless steel with the thickness of 0.3mm multiplied by 16mm, a steel belt is washed, dried and rolled into a U shape, and then the powder is filled into the steel belt, wherein the filling rate is 39%. And rolling the U-shaped groove into a circular shape, and then continuously rolling and drawing and reducing to obtain the finished welding wire with the diameter of 2.4.
The flux-cored wires prepared in the above examples were used for build-up welding of continuous casting rolls in the horizontal section of a continuous casting machine, and the welding process performance and the hardness of the build-up welding layer are shown in table 1.
Table 1: performance index of the product of each example
| Example numbering | 1 | 2 | 3 | 4 | 5 |
| Welding process performance | Good effect | Good effect | Good effect | Good effect | Good effect |
| hardness/HRC of the cladding layer | 47.5 | 47.9 | 48.2 | 47.8 | 47.2 |
| Crack(s) | Is free of | Is free of | Is free of | Is free of | Is free of |
| Air hole | Is free of | Is free of | Is free of | Is free of | Is free of |
the open arc self-protection flux-cored wire for surfacing of the continuous casting roller at the horizontal section of the continuous casting machine has excellent process performance and moderate hardness of a cladding layer, and is obviously superior to the traditional horizontal continuous casting roller for surfacing of the submerged arc through practical continuous casting process examination on the steel passing amount and service life, and the roller surface of the offline roller has no obvious cracks and severe abrasion.
Claims (2)
1. The open arc self-protection flux-cored wire for surfacing of the continuous casting roller at the horizontal section of the continuous casting machine is composed of powder and a low-carbon steel strip, and is characterized in that the powder accounts for 36-40% of the total weight of the wire, and the powder comprises the following components in percentage by mass: 3.2-4.5% of metallic nickel powder, 0.8-1.8% of ferromolybdenum, 0.4-0.7% of ferrovanadium, 0.3-0.8% of ferroniobium, 18-24% of micro-carbon ferrochromium, 1.2-2.1% of chromium nitride, 0.8-1.7% of 45# ferrosilicon, 1.8-3.2% of electrolytic manganese, 0.2-0.66% of sodium fluoroaluminate, 0.8-2.1% of dolomite, 3.5-7.5% of rutile, 1.5-3.9% of fluorite, 0.5-1.1% of aluminum powder, 0.25-0.42% of magnesium powder and the balance of iron powder.
2. The open arc self-shielded flux-cored wire for continuous casting roller overlaying of the horizontal segment of the continuous casting machine according to claim 1, wherein the carbon content of the low-carbon steel strip is in a range of 0.05-0.08%.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910930361.9A CN110539103A (en) | 2019-09-29 | 2019-09-29 | Open arc self-protection flux-cored wire for surfacing of continuous casting roller at horizontal section of continuous casting machine and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910930361.9A CN110539103A (en) | 2019-09-29 | 2019-09-29 | Open arc self-protection flux-cored wire for surfacing of continuous casting roller at horizontal section of continuous casting machine and manufacturing method thereof |
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| CN110539103A true CN110539103A (en) | 2019-12-06 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975197A (en) * | 2021-02-24 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Flux-cored wire for surfacing hard surface layer of efficient welding hot forging die |
| CN112975196A (en) * | 2021-02-24 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Flux-cored wire for efficient welding hot forging die surfacing transition layer |
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| CN104690451A (en) * | 2015-02-27 | 2015-06-10 | 首钢总公司 | High-hardness self-protecting flux-cored welding wire for overlaying repair of continuous casting roller |
| CN105057926A (en) * | 2015-09-22 | 2015-11-18 | 山东大学 | Special flux-cored wire for hot-working die repairing surfacing |
| CN107252994A (en) * | 2017-05-12 | 2017-10-17 | 天长市通联焊业有限公司 | A kind of wear-resisting high rigidity flux-cored wire |
| CN108994425A (en) * | 2018-07-16 | 2018-12-14 | 中冶建筑研究总院有限公司 | A kind of compound (again) manufactures Continuous Casting Rolls self-protection flux-cored wire and technique |
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2019
- 2019-09-29 CN CN201910930361.9A patent/CN110539103A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009119497A (en) * | 2007-11-15 | 2009-06-04 | Nippon Steel & Sumikin Welding Co Ltd | Flux-cored wire for self-shielded arc welding for fire resistant steel |
| CN104690451A (en) * | 2015-02-27 | 2015-06-10 | 首钢总公司 | High-hardness self-protecting flux-cored welding wire for overlaying repair of continuous casting roller |
| CN105057926A (en) * | 2015-09-22 | 2015-11-18 | 山东大学 | Special flux-cored wire for hot-working die repairing surfacing |
| CN107252994A (en) * | 2017-05-12 | 2017-10-17 | 天长市通联焊业有限公司 | A kind of wear-resisting high rigidity flux-cored wire |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112975197A (en) * | 2021-02-24 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Flux-cored wire for surfacing hard surface layer of efficient welding hot forging die |
| CN112975196A (en) * | 2021-02-24 | 2021-06-18 | 天津市金桥焊材集团股份有限公司 | Flux-cored wire for efficient welding hot forging die surfacing transition layer |
| CN112975196B (en) * | 2021-02-24 | 2023-02-21 | 天津市金桥焊材集团股份有限公司 | Flux-cored wire for efficient welding hot forging die surfacing transition layer |
| CN112975197B (en) * | 2021-02-24 | 2023-02-21 | 天津市金桥焊材集团股份有限公司 | Flux-cored wire for surfacing hard surface layer of efficient welding hot forging die |
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Application publication date: 20191206 |